@Scott98373586

https://xitter.cf/t.co/xc26q47qaK

ag.purdue.edu/btny/mcadam/
Joined February 2022
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bsky.app/profile/scottmcadam… – at West Lafayette, IN
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The power of independent #generations in #plants 📖 nph.onlinelibrary.wiley.com/… 👆 A #Commentary by Michael Kessler and @DaniArosMualin on this article by Blake-Mahmud et al. 👇 📖 nph.onlinelibrary.wiley.com/… #LatestIssue @wileyplantsci
Schematic representation of ecological differences and ploidy levels between conspecific gametophytes and sporophytes.

ALT Schematic representation of ecological differences and ploidy levels between conspecific gametophytes and sporophytes.

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Within-leaf variation in embolism resistance is not a rule for compound-leaved #angiosperms New #AJB research by Ian Rimer & Scott A. M. McAdam doi.org/10.1002/ajb2.16447 #botany @wileyplantsci
Representative images of an Oxalis debilis (A) and Chamaecrista fasciculata (B), with a black arrow pointing to the pulvini in each respective image. Images of a leaf in which a single embolism event that propagated through the pulvini is shown in color (C and D) with the corresponding water potential at which the embolism events occurred. All embolism events across the leaf were color-coded by the water potential at which they were observed (E and F). For each species, a color scale (G and H) depicting the water potential with each embolism event that occurred is shown below the corresponding image.

ALT Representative images of an Oxalis debilis (A) and Chamaecrista fasciculata (B), with a black arrow pointing to the pulvini in each respective image. Images of a leaf in which a single embolism event that propagated through the pulvini is shown in color (C and D) with the corresponding water potential at which the embolism events occurred. All embolism events across the leaf were color-coded by the water potential at which they were observed (E and F). For each species, a color scale (G and H) depicting the water potential with each embolism event that occurred is shown below the corresponding image.

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🌱 Exciting news: My paper is accepted! Long-awaited evidence on how #root #mucilage helps plants maintain #water uptake and #transpiration in drying soils 🌍💧 #OpenAccess #PlantScience #RootHydraulics #drought @TU_Muenchen @MutezAhmed academic.oup.com/aob/advance…
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Happily sharing our latest work published in @Nature: doi.org/10.1038/s41586-024-0… How does #soil texture influence #plant #water stress and #ecosystem vulnerability to #drought on a #global scale? :) Thanks to a fantastic team of co-authors ... (see below 👇)
Global influence of soil texture on ecosystem water limitation

ALT Global influence of soil texture on ecosystem water limitation

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Exciting new paper by Or Shapira, @yotamzait1 @brodersen_lab @TheHolbrookLab @Scott98373586. The fan speed in your cuevete will effect the gas exchange rate
The Plant Journal@ThePlantJournal17 Oct 2024
EarlyViewAlert👁‍🗨Wind speed affects the rate and kinetics of stomatal conductance🍃doi.org/10.1111/tpj.17066 Wind affects stomatal conductance 👉need to account for wind in gas exchange measurements. This enhances our understanding of plant responses to environmental changes
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New paper by @AcerFeng with @FultonRockwell and Shmuel Assouline about water loss from bagged leaves. Important read for those who store bagged leaves befor measurments. Free link: onlinelibrary.wiley.com/doi/…

Water Loss From Bagged Leaves During Storage: Why and When?

Storage of bagged leaves leads to a significant drop in water potential due to metabolic heat evolution. The thermal gradients result in vapour leaving the leaf and condensing on the bag. The paper...

onlinelibrary.wiley.com
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Pleased to share this paper, now online @NewPhyt, where we look at the genes expressed in fern guard cells, and the functionality of anion channels from the SLAC/SLAH family from ferns and other other diverse plant groups. Check it out here: nph.onlinelibrary.wiley.com/…
A multipanel figure showing that unlike angiosperm stomata, fern stomata are insensitive to abscisic acid (ABA), and fern guard cell SLOW ANION CHANNEL (SLAC) homologues are not activated by ABA-signalling kinases. (a) Fluorescent images of guard cells of the angiosperm Nicotiana tabacum (tobacco) and fern Polypodium vulgare after current ejection of 1 mM Lucifer Yellow, or 1 mM LY with 1 mM ABA. (b) Brightfield images of the same guard cells up to 20 min after current ejection. (c) Normalised stomatal aperture over 20 mins, showing a decrease in stomatal aperture in response to ABA in N. tabacum but not P. vulgare. (d) Mean whole-oocyte current measurements of SLAC homologues from the angiosperm Arabidopsis thaliana (responsive) and the ferns P. vulgare and Ceratopteris richardii (not responsive), co-expressed with or without ABA-signalling kinases in Xenopus oocytes.

ALT A multipanel figure showing that unlike angiosperm stomata, fern stomata are insensitive to abscisic acid (ABA), and fern guard cell SLOW ANION CHANNEL (SLAC) homologues are not activated by ABA-signalling kinases. (a) Fluorescent images of guard cells of the angiosperm Nicotiana tabacum (tobacco) and fern Polypodium vulgare after current ejection of 1 mM Lucifer Yellow, or 1 mM LY with 1 mM ABA. (b) Brightfield images of the same guard cells up to 20 min after current ejection. (c) Normalised stomatal aperture over 20 mins, showing a decrease in stomatal aperture in response to ABA in N. tabacum but not P. vulgare. (d) Mean whole-oocyte current measurements of SLAC homologues from the angiosperm Arabidopsis thaliana (responsive) and the ferns P. vulgare and Ceratopteris richardii (not responsive), co-expressed with or without ABA-signalling kinases in Xenopus oocytes.

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It is a pleasure to have (finally!) contributed to the esteemed anthology of literature questioned by @KarlheinzHahn1 – at West Lafayette, IN
Karlheinz Hahn@KarlheinzHahn13 Oct 2024
Replying to @NewPhyt @Scott98373586
For more than a century an assumed hydraulics🚿 inside the xylem (≙ “cohesion-tension theory”) has been a controversial subject (below⬇️). Here Manandhar et al. describe - as increase of controversy – hydraulics outside the xylem. This also contradicts physical requirement.😨
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Artículo @IRNAS_CSIC @JaviPichaco Título: Abscisic acid increase correlates with the soil water threshold of transpiration decline during drought Autor: Manandhar, Anju; Pichaco, Javier; McAdam, Scott hdl.handle.net/10261/366460
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Manandhar et al.: Dynamic soil hydraulic resistance regulates #stomata 📖 ow.ly/IOIx50SRSry @Scott98373586 @wileyplantsci
Schematic representation of the sequence of functional response to decreasing soil water content in seed plants.

ALT Schematic representation of the sequence of functional response to decreasing soil water content in seed plants.

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Wahooo! Go Anju and team! EPIC paper!!!!!!!!!!!
New Phytologist@NewPhyt6 Aug 2024
Manandhar et al.: Dynamic soil hydraulic resistance regulates #stomata 📖 ow.ly/IOIx50SRSry @Scott98373586 @wileyplantsci
Schematic representation of the sequence of functional response to decreasing soil water content in seed plants.

ALT Schematic representation of the sequence of functional response to decreasing soil water content in seed plants.

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NEWS & VIEWS: SOS: Speed of Stomata opening and closing is influenced by vapour pressure deficit (Alexandra J Burgess, José Manuel Ugalde) buff.ly/48emnI2 @ASPB #PlantSci
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This study was carried out during my fruitful stay at @LifeAtPurdue @PurdueAg in @Scott98373586 laboratory, where he has a long list of very interesting plant specimens. I could explain more, but I don't want to give you spoilers!!! Run and read it! :)
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Through measurements of gas exchange from darkness we see how at high atmospheric demand this interaction is lower and the process of stomatal opening is faster...
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In it, we evaluated how the mechanical interaction of epidermal cells and guard cells in angiosperms influences the stomatal response to light. We observed how plants with this interaction respond faster to light at high levels of atmospheric demand than those that do not...
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For this purpose, we use plants that cover the evolutionary spectrum, from ferns to angiosperms to gymnosperms. For this purpose, we use plants that cover the evolutionary spectrum, from ferns to angiosperms to gymnosperms...
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The first article of my thesis is ready! (🧵...) "Mechanical advantage makes stomatal opening speed a function of evaporative demand." academic.oup.com/plphys/arti…
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The journey of organizing the 6th ´Xylem International Meeting´ (#XIM6) has officially begun in Seville, Spain! ☀️ Stay tuned to @Xylem_Meeting for updates🗓️ – at Seville, Spain
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Had alot of fun writing this anatomy- physiology crossover with a great team🌳🫧 brill.com/view/journals/iawa… Read about the potential roles of the cells surrounding the plant water transport system during drought, in the context of physiology & observations made by Sherwin Carlquist!
Figure by Sophie Everbach. The figure has three columns and and 5 rows and illustrates 5 key cell-types that make up the cellular background in woody flowering plants. The illustrations are in pink and purple.

ALT Figure by Sophie Everbach. The figure has three columns and and 5 rows and illustrates 5 key cell-types that make up the cellular background in woody flowering plants. The illustrations are in pink and purple.

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