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Nick Desnoyer

@NickDesnoyer

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Researcher and artist interested in plant development and design. Timelapse, vectors, and genetic modification as mediums.

Zurich, Switzerland
Joined December 2018
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Fatal Attraction😈 7-hour timelapse showing the precision guidance of pollen tubes (gray) by synergid cells (pink) housed within the ovules (blue). Upon arrival, one synergid dies along with the explosion of the pollen tube allowing for sperm release (see top right ovule).
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Experiments failing? Try this for instant beautiful results ✨ A drop of 50% isopropanol w/ 1% methyl blue over a bed of sunflower oil. Evaporation of the alcohol at the edge causes a difference in surface tension, generating a flow and ejection of droplets (Marangoni effect)
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
10 months
Electrical signaling in Venus Flytrap shown in real-time⚡️ Touching the trigger hairs of the trap causes an influx of calcium ions (shown on top) that spreads rapidly across the leaf. Two action potentials and the leaves quickly close to trap their prey 🪰
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
6 months
With a bit of synthetic biology and classical genetics, I transformed the unremarkable Arabidopsis flower into a beautiful pink rose 🌹🧬 with @bencives . (A thread 🧵)
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
If you can't keep your plates clean, just work with Physcomitrella.. apparently, fungi are scared of it😀 (Anthoceros on the left, Physco on the right).
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Carefully dissected Arabidopsis pistils show the beautiful ovules and journey of the pollen tubes hidden just beneath their carpel walls. Darkfield (left) and GUS staining (right).
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
10 months
The hero of plant science: Arabidopsis thaliana
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
3 months
Circumnutation is a common plant behavior in which plants rotate around a central axis, allowing exploration of the surrounding 3D space. This movement is the achievement of coordinated cell growth and turgor pressure changes, and was first analyzed in detail by Charles Darwin.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Inside look at pollen tube growth and fertilization within the pistil of an Arabidopsis flower just 8 hours (left) and 12 hours (right) after pollination.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
The petals on this alpine flower (Saxifraga rotundifolia) are patterned with polka dots in a gradient from yellow to violet. A closer look shows the spots themselves have an intensity gradient 🧐
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
15 days
Growth of a seedling🌱 The first two "true leaves" of a seedling grow from the meristem, a region of small undifferentiated cells between the two embryonic leaves, or cotyledons. These are usually covered in spiky trichomes as they are vulnerable to herbivory by insects.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
8 months
Someone once told me every Ph.D. involves some repetitive strenuous task. Mine has been dissecting and arranging tiny flower parts to image plant double fertilization.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
28 days
Calcium Biosensing Visual Guide 🧵 Calcium is a divalent cation that plays an important role as a second messenger in the cytosol ([Ca2+]cyt) of plant cells, mediating a myriad of signalling responses throughout development and in response to different environmental stimuli.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
8 months
Calcium waves in a non-vascular land plant, Marchantia polymorpha (wait until 0:10) ⚡️
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
7 months
I tried growing the biggest Arabidopsis thaliana plant possible for fun. Conclusions: hybrids are huge and pot size extends their lifetime dramatically.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
11 months
Germination of an Arabidopsis seed over 7 days. First to emerge is the radicle (embryonic root) followed by the hypocotyl and cotyledons (embryonic shoot/leaves). Growth in the hypocotyl is solely driven by cell expansion making it all wiggly and cute.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Leguminous plants have an amazing way of capturing nitrogen-fixing bacteria called Rhizobia through the formation of root nodules. Popping a soybean nodule is oddly satisfying and shows just how much bacteria they contain.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
4 months
Unlocking the beauty of Arabidopsis with genetics🌸 Various floral morphs and color variations found in segregants of my hybrid A.thaliana roses. Comment your favorite (A-F) and I will give it an upgrade 🧬
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
The most aesthetic Arabidopsis mutant- agamous. Knockout of AGAMOUS leads to a rose-like "double flower" phenotype with an increased number of floral whorls consisting only of sepals and petals.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
4 months
Many flowers open in the morning in response to light and their circadian rhythm to attract pollinators active during the day. In this 3-day timelapse, my Arabidopsis rose variety opens its petals in the morning despite having no pollen :)
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
1 year
Painting floral organs with genetically encoded RUBY, a non-invasive reporter utilizing red betalain synthesis from beets. Lines generated by cloning pro @bencives . For more on RUBY:
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
5 months
Amidst writing my thesis and unending data analysis, my A.thaliana rose varieties in the greenhouse are little motivators that fill me with joy. While there is little love for the aesthetics of A.thaliana, it's the "simplicity" and sheer knowledge it's given us that is beautiful
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
11 months
Arabidopsis bolting be like: steady... almost there... freak out!
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
4 months
Electrical signaling in an Arabidopsis thaliana inflorescence upon leaf wounding. Fluorescence increases (GCaMP) indicate the uptake of calcium in the cells as a result of long-distance signaling. Tools like this reveal the inner workings of plants and their response to stimuli
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Microscopic Explosions 💥 Arabidopsis pollen tubes race to the synergid cells (outlined) to be the first to explode and release their sperm cells. 3 hours in 7 seconds.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
6 months
In the F2 a few pink Arabidopsis roses popped up that were obviously homozygous for agamous, erecta, and the RUBY transgene. To my knowledge, this type of flower is the only one in the world and came just in time for Christmas ✨
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Growth timelapse of the model liverwort Marchantia polymorpha (3 weeks in 12 seconds). Thanks, @AlexGirFon for letting me record your plants 😁
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
3 years
Semi-in Vivo growth and coiling of Arabidopsis pollen tubes in feronia mutant ovules. 8 hours in 7 seconds.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
1 year
“It is hardly an exaggeration to say that the tip of the radicle thus endowed [with sensitivity] and having the power of directing the movements of the adjoining parts, acts like the brain of one of the lower animals" -Charles Darwin, The Power of Movement in Plants
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
1 year
Petal number variation found in Arabidopsis thaliana✨ Which is your favorite?
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
5 months
3-day growth timelapse of a liverwort gemma. Gemmae of Marchantia are cute asexual propagules that are shed to produce new clonal plants. New cell division occurs in the two notches where meristematic cells develop into different tissues. (Scale ~1mm)
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
3 years
apetala1; cauliflower mutant Arabidopsis inflorescences. Maybe instead of applying Arabidopsis research to crop plants, we just make Arabidopsis a crop plant 🧐
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
3 years
Single slice perspective on the ER network and its mesmerizing movements within Nicotiana pavement cells. 1 hour in 30 seconds.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
1 year
Gemma growth of the liverwort, Marchantia polymorpha (10-day timelapse). The gametophyte grows with repeated dichotomous branching at the apex and long single-celled rhizoids emerging mostly from the ventral surface. Such a cool plant.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
6 months
Calcium fireworks in a gemmae cup of the liverwort, Marchantia polymorpha ✨
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
3 months
Flower genetics practical - updated with ruby roses to show dihybrid crosses and incomplete dominance 🌸
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
1 year
Arabidopsis seedling germination- 7 days in 7 seconds
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
1 year
Growth of Anthoceros agrestis, an emerging hornwort model organism! To my knowledge, this is the first timelapse of Anthoceros- perhaps because it is so small (video 1cm in width) and grows so slowly (3 weeks shown in 10 seconds). Thanks, @Alon_Israeli for the plant :)
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
1 year
Our JoVE methods video for live imaging of double fertilization in Arabidopsis with SIV cum septum is now out: Please visit my poster PO-518 at the ICAR conference to learn more!
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
11 months
A visual quick guide to the staging, dissection, and live imaging of double fertilization in Arabidopsis from our recently published JoVE methods paper:
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
3 years
Sperm cell attraction and entrance into the archegonial neck of Marchantia polymorpha. Yes, plants have sperm cells too, and yes some can swim :) 1000X magnification.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
1 month
GFP quick guide! 🧵 Green fluorescent protein, isolated from Aequorea victoria 🪼, has 11 antiparallel beta strands forming a cylinder that contains the chromophore (green). Fluorescence of the chromophore is protected from quenching with water by the stable barrel structure.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
1 year
Migration of sperm cells in pollen tubes targeting embryo sacs in vitro🌸The jittery motion of the fluorescent sperm as they stream through the tube looks like little lightning bugs 🪲
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
3 years
3D reconstruction and segmentation of Arabidopsis synergid cells and their filiform apparatus- a thickened cell wall structure that facilitates secretion of pollen tube attractants. Thanks, @CeliaBaroux for the great Imaris tutorial!
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
1 year
Arabidopsis roses (agamous) and wildtype blossoming in the morning. Happy #PlantAppreciationDay
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Visualizing the intercellular spaces of a leaf 🌱 Syringe infiltration of tobacco leaves using congo red dye 🩸 and bright bottom illumination 💡reveals intercellular spaces connected by stomatal cavities.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
4 months
No, these leaves are not internally bleeding. They are producing the pigment betalain using genes from beetroot with the RUBY system! Among the many uses of RUBY, I find it offers a way to visualize the colonization and efficiency of Agrobacterium within the leaf over time.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
1 year
What's better than finding a four-leaf clover🍀? Finding a 6 petaled flower on wildtype Arabidopsis✨
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 months
Fellow scientists and plant enthusiasts, I invite you to my public PhD defense and first ever art exhibition, Plant Models, on April 29. The defense and exhibition will be at the UZH Botanical Gardens starting at 11:00 and 17:00 CEST respectively. Exhibition details below 🧵
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
1 year
Marchantia polymorpha thallus (left) and a magnified airpore (right) under the scanning electron microscope. Notice the chloroplasts just under the surface of the epidermal cells. Scale bar 50μm.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
8 months
Painting with pollen🌸 An inside look at the invasive growth of pollen tubes through the style and transmitting tract of an Arabidopsis pistil. This 2PEM tiled image shows a living dissected pistil (no staining) with markers for the ovules, embryo sac, and synergid cells.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
These leaf-shaped, chloroplast-containing swimmers aren't plants, but rather protists of the Phacus genus. Their red eyespot guides them to the light of the microscope... even when a water flea stands in the way.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
The Final Interaction 🌹 After several hours of growth through the flower, a pollen tube (pink) arrives at the synergid cells (white), its final destination before both cells die in order to deliver the sperm cells for double fertilization.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
1 month
Thanks to everyone who came to my PhD defense and following art exhibition! It was an amazing day I will never forget :) Pictures of the presentation, committee exam, and exhibition in the thread🧵
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
I always keep my plates after transplanting seedlings to see what is growing in the soil. This week the plates were exceptionally colorful 🤩
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
3D reconstruction of Marchantia polymorpha gemmae- masses of cells by which the plant clonally reproduces. The cell patterning is always so intriguing.. #FluorescenceFriday
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
These trichomes on baby cacti are a beautiful example that spines are actually modified leaves. Thanks, @MartinAle1981 who grew these from seed on MS media.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
5 months
So I'm randomly listening to this podcast and @jrkelly starts talking about the Arabidopsis rose I made (20:44)!!! That made my freaking day, but sadly I did not make it at home in my basement 😅
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@jrkelly
Jason Kelly
@jrkelly
5 months
Enjoyed chatting with @Joubinmir on @kleinerperkins @KPGrit podcast!! 🦖🧬🌸
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
1 year
Swarming pollen tube growth through the transmitting tract of a single Arabidopsis locule (my submission to last years Nikon Small Worlds competition). Congrats to Mizuta et al who just published a similar "single locule" technique using deep 2PEM imaging:
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Fertilization in real-time. Sea urchin eggs injected with sperm under a coverslip are fertilized within seconds. At the site of sperm entry, the vitelline layer is lifted and develops a fertilization envelope to prevent polyspermy.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Arabidopsis thaliana and her bigger sister, Arabidopsis Lyrata. Two closely related species with very different reproductive strategies- can you tell which one is the outcrosser?
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
6 months
Floral design by synthetic biology represents a fascinating research avenue where the phenotype is obvious, beautiful, and easily understood by non-biologists. Check out Sebastian ( @ATinyGreenCell ) who is an amateur biologist and flower designer for more cool works.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
8 months
SEM array tomography of an entire Arabidopsis ovule. This cross-section gives a glimpse into the extreme complexity of this beautiful plant organ. With this false coloring, the starch granules and chalazal end of the embryo sac look like pebbles in a stream :)
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 months
Many flowers change color following pollination to direct the attention of pollinators 🐝 Here, this cowpea flower changes from white to yellow upon self-pollination ✨
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
1 year
Even the hidden parts of a flower are so picturesque ✨Glowy fertilized embryo sacs under an RGB filter.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
3 years
Satisfying syringe infiltrations of Nicotiana benthamiana using congo red. Liquid enters through stomata under pressure and travels through intercellular spaces connected by stomatal cavities.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Arabidopsis pollen tube reception highlighted in this years 2022 Small World in Motion Competition 🥳| Nikon’s Small World:
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Thale cress (Arabidopsis thaliana) pollen tubes | 2022 Small World in Motion Competition

Nicholas Desnoyer - Thale cress (Arabidopsis thaliana) pollen tubes guided to ovules by cues secreted from the synergid cells (pink) where they burst and release sperm

www.nikonsmallworld.com
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
1 year
Having trouble with in vitro fertilization imaging in Arabidopsis? In this @JoVEJournal paper, I describe our modified technique, SIV cum septum, which allows for the observation of up to 40 fertilization events per imaging session:
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Beautiful autofluorescence of Utricularia vulgaris that I found in our garden pond. The traps (green) on this bladderwort catch small aquatic prey that brush against their trigger hairs. Their "trapdoors" close in 10 milliseconds making them the fastest carnivorous plants.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
10 months
Thank you to Mitsuyasu Hasebe's group who shared this rare transformant line with us. For more details on calcium signaling in flytrap check out their paper here:
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Calcium dynamics during trap closure visualized in transgenic Venus flytrap

Nature Plants - A transgenic Venus flytrap expressing a fluorescent calcium sensor allows real-time live quantification of calcium waves triggered by sensory hair movement. The study suggests that...

www.nature.com
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
4 months
Etiolation is a developmental program flowering plants undergo in the absence of light leading to a longer stem and pale yellow leaves. When finally re-exposed to light the leaves turn green and open up :) Thanks, @FMirasole for providing the seedlings 🌱
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
This diatom-filled donut is actually an amoeba (Arcella vulgaris) that makes its own shell for protection and trapping prey. Check out the contractile vacuoles expelling water from the cytoplasm to keep it from exploding 🧐
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Hopefully inspired a few young scientists today and convinced them why plants are so fascinating 🌱 #FoPD22
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
3 years
No biological question, just intriguing photos of liverwort, hornwort, and moss chloroplasts. Thanks to @BioBiest for providing the Anthoceros and completing the bryophyte holy trinity.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
3 years
Meet my pet alien, her name is Tak-2 MpBNB-GR; pUBE2:mScarlet-Lti6b. #Marchantia
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
7 months
Despite all efforts to inspire little plant biologists, a drop of pond water always steals the show 🦠🔬 #Zukunftstag
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Time-lapse of the beautiful filamentous blue-green algae (*not a plant), Oscillatoria. These cyanobacteria slide back and forth orienting themselves towards the light.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Drosera rotundifolia- this plant carnivore dissolves insects stuck to its glandular tentacles.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Happy Valentine's Day everyone! (Alcohol and Oil) ♥️
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Proteins won't crystallize? Make these instant beautiful salt crystals instead🙌 Evaporation causes the solution to become supersaturated enabling crystallization. Make sure to wear gloves- or just try the soy sauce :) Timelapses taken at 160X using polarized light or DIC.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
In our plant biology practical, we challenged the students to prepare cross-sections of pumpkin stems stained with toluidine blue🎃 Focus-stacked images of the best slides produced textbook-level diagrams of vascular bundles and xylem spirals :)
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
6 months
First @bencives transformed wild-type Col0 with pLAT52:RUBY, a reporter that converts tyrosine to vividly red betalain (the same compound seen in beetroot). While many lines were pollen-specific as expected, he found one line that expressed RUBY just in the petals (3rd from left)
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Chloroplasts and endosymbiotic algae in the hornwort, Anthoceros agrestis. 96 images focus stacked and tiled without a motorized stage 💪
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
5 months
I usually just post plant bio art, but damn my primer validation for qPCR (left) looks like a little kid drew a crayon rainbow. Right shows the AI interpretation of what happened inside the thermocycler hehe.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
1 year
Parts of the plant cell as seen with TEM and SEM array tomography (top right) false-colored for visualization. Thanks, @uzh_microscopy for the great course on sample preparation for electron microscopy 🔬
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
1 year
Store-bought yellow onions are bulbs, modified stems in a resting state which can quickly grow leaves and roots when conditions are favorable. Here's a week of growth in a glass of water.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
11 months
@ATinyGreenCell Crossing this girl to an agamous het to get an arabidopsis rose in the F2 for our bio course 🌹
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
6 months
I then crossed this pPETAL:RUBY lines with a classic Arabidopsis mutant, agamous, that produces infinitely repeating floral whorls of petals and sepals. Because this mutant phenotype is more pronounced in Landsberg erecta, I used ag-1/+ hets we found by EMS in Ler0 background.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
3 years
Took a quick break from biology to help with my student's project in fluid dynamics. Marangoni effect demonstrated under the microscope using methyl blue and isopropanol.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
3 years
Found intriguing phenomena while curiously emulsifying DNA loading buffer and isopropanol in a suspension of oil. Looks like I may have accidentally created a new universe 🤯
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
This cute cuttlefish (sepiolia atlantica) has elastic pigment bodies, called chromatophores, that retract and expand rapidly to camouflage its body. Magnification of the chromatophores shows an orchestra of these individual neuromuscular end organs contracting in sync.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
4 years
My first scientific paper was published today :) It couldn't have been possible without the invaluable help of my undergraduate/ masters mentor @rpalaniveluaz , and those that paved the way in GPI research before me. Hopefully many more papers to come!
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
4 years
Happy to see my review with @rpalaniveluaz published in the Plant Reproduction journal! Here we compare the life of mammalian and plant GPI-anchored proteins from synthesis to the plasma membrane with a special focus on their role in reproduction:
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Even in the snow, the lichens provide such nice colors :) Xanthoria and Flavoparmelia.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
3 years
Z-Stack of a Marchantia gemma cup. In space because it seems fitting.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Blossoming Bryozoa releasing their crown of tentacles (lophophores) used for filter feeding.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
3 years
Cytoplasmic streaming of mitochondria within an onion epidermal cell (40X speed). Captured by students of our plant genetics course who successfully particle bombarded a store-bought onion :)
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
This beady eye boy (well, hermaphrodite) looks to have gone vegetarian. Dalyellia, a genus of flatworms, are photophobic making them particularly hard to follow under the microscope. #Planarians
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
28 days
GCaMP has been used in plants to show the dynamics of Ca2+ that were previously only measured by electrodes. For example, the well known electrical signaling of Venus fly trap can now be visualized and were measured to propagate at about 50mm per second.
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@NickDesnoyer
Nick Desnoyer
@NickDesnoyer
2 years
Radial cleavages of the Sea Urchin zygote (top left).
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