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Kylie John

Drought-induced injury is associated with hormonal alteration in Kentucky bluegrass - PMC - 0 views

www.ncbi.nlm.nih.gov/...PMC6768267

HSR-2025 HSR botany hormones lawngrass

shared by Kylie John on 20 Sep 24 - No Cached
  • Mature KBG (cv. ‘Wildhorse’) plugs (10 cm diameter, 5 cm deep)
  • The grass was transplanted into pots (15 cm diameter, 15 cm deep, with 8 holes on the bottom) filled with either top soil and sand mixture (2:1, v/v). A piece of plastic screen was placed in the bottom of the pot to prevent soil from leaching.
  • at optimum conditions (mean±SD) at 22 ± 0.8/16 ± 0.6°C (day/night), 70%±8% relative humidity, PAR at 400 ± 9 µmol m−2 s−1 and 12-h photoperiod. Nitrogen was applied at 2 g m−2 (from 28–8-18 complete fertilizer with micronutrients) at transplanting and then 1 g m−2 biweekly on all treatments until the end of the trial.
  • ...22 more annotations...
  • trimmed at 7 cm and irrigated two times a week to field capacity.
  • Six weeks after transplanting
  • For drought stress treatment, the amount of irrigation water was determined based on evapotranspiration (ET) loss by weighing the pots every other day and the irrigation was provided to compensate 30% to 50% ET loss. ET was determined by weighing the pots.
  • VWC was reduced from 34.6% to 27.9% between day 0 and day 7, from 27.9% to 23.4% between day 7 and day 14, from 23.4%% to 14.5% between day 14 to day 21, and from 14.5% to 5.1% between day 21 and day 28.
  • Leaf chlorophyll was extracted with acetone and measured using a spectrophotometer
  • Leaf photosynthetic rate and stomatal conductance were measured using a portable photosynthetic system
  • turf quality started to decline at day 7 due to drought stress.
  • Drought stress reduced turf quality rating by 14.8% relative to the control at the end of drought stress (28 d).
  • The electrolyte leakage increased gradually from day 7 through day 21 due to drought stress.
  • Drought stress increased electrolyte leakage by 35.6% at day 14, 95.7% at day 21, and 105.4% at day 28 when compared to the control.
  • chlorophyll began to decline after day 7 due to drought stress
  • educed chlorophyll content by 39.0% relative to the control.
  • photosynthetic rate due to drought stress was observed as early as day 7
  • Stomatal conductance decline was first observed at day 4 of drought stress
  • day 28 when drought stress reduced stomatal conductance by 84.4%
  • The ZR level declined gradually from day 14 through day 28 due to drought stress. Drought stress reduced ZR by 28.5% at day 14, 35.1% at day 21, and 59.1% at day 28 relative to the control.
  • 1 week after ZR did. At the end of drought stress (day 28), drought stress reduced iPA by 50.4% relative to the control.
  • Drought stress reduced leaf IAA by 14.3% and 26.7% at day 21 and day 28, respectively, when compared to the control.
  • The ABA started to accumulate after day 4 of drought stress and the difference between drought stress and the control was observed as early as 7 d of drought stress
  • The ABA content gradually increased from day 7 through day 28. Drought stress increased leaf ABA by 23.6% at day 7, 30.7% at day 14, 87.6% at day 21, and 108.5% at day 28 relative to the control.
  • drought stress did not impact leaf GA4 content
  • We found that ABA/CK increased sharply from day 14 through day 28 due to increase in ABA and decline in CK (ZR + iPA) during the same period. At the end of trial (day 28), drought stress induced an increase in leaf ABA/CK ratio by 3.4-fold relative to the control.
Sean Nash

Applied Sciences | Free Full-Text | Method for Prolonging the Shelf Life of Apples afte... - 1 views

www.mdpi.com/3975

agriculture apples fruit ripeness quality HSR HSR-2025 science botany biology potential research idea

shared by Sean Nash on 23 May 24 - No Cached
  • Sean Nash on 23 May 24
     
    (A pretty fancy piece of equipment is needed here, but I like the concept of this sort of project. Rigorous life science concepts, ability to generate a ton of data, super applicable to real life immediately, etc.)
emmarrogers

Sustaining America's Aquatic Biodiversity - Crayfish Biodiversity and Conservation | VC... - 0 views

www.pubs.ext.vt.edu/...420-524.html

crayfish HSR HSR-2025 behavioralscience environmental

shared by emmarrogers on 11 Sep 24 - No Cached
  • Crayfish are ecologically and economically valuable animals.
  • nearly 75 percent crayfish.
  • Crayfish are important indicators of water quality
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  • sensitive to water pollution
Sean Nash

Tools to illustrate your scientific works! (open source web-based) | by Dr. Veronica Es... - 0 views

medium.com/...-source-web-based-c5bd12aaec5b

GoOpen CC creativecommons HSR HSR-2025 science illustration images art illustrations modeling models diagrams free opensource

shared by Sean Nash on 01 Jul 24 - No Cached
  • 1.-ChemixChemisc is an educational app that lets you easily draw lab diagram setups and explain your experiments. It has a large library of highly customisable apparatus and various features to help you draw diagrams with ease [3].
  • 2.-SmartSince its launch in 2001, Servier Medical Art is a trusted and internationally recognized resource used in respected journals, textbooks, online resources, and more. [ In this website you will find 3000 Free medical images to illustrate your publications and Powerpoint presentations!
  • 3.-BioiconsBioicons is a free library of open source icons for scientific illustrations using vector graphics software
    • Sean Nash
      Sean Nash on 01 Jul 24
       
      This one I already knew of and used. Several students made use of this resource last year.
  • ...3 more annotations...
  • 4.-Health IconsHealth Icons is a volunteer effort to create a ‘global good’ for health projects all over the world. These icons are available in the public domain for use in any type of project.
  • 5.-SciDrawSciDraw is a free repository of high quality drawings of animals, scientific setups, and anything that might be useful for scientific presentations and posters [9].
  • 5.-Draw.ioDraw.io is a free, online diagramming tool that allows you to create flowcharts, diagrams, mind maps, organisation charts, and much more. A web-based application, Draw.io is fully integrated with Google Drive. This means that you can automatically save the results of your work in your Google Workspace or Gmail account [10].
  • Sean Nash on 01 Jul 24
     
    Save these for later this year. You will likely use resources like this to aid in your diagrams/models for your display.
emmarrogers

Crayfish Light-Dark Maze - Maze Engineers - 0 views

maze.conductscience.com/...crayfish-light-dark-maze

crayfish

shared by emmarrogers on 17 Sep 24 - No Cached
  • Time spent in the dark arms of the maze Time spent in the light arms of the maze
  • water quality
  • prefer dark places
  • ...7 more annotations...
  • anxiety-like behaviors
  • Moreover, it can effectively be used to observe the effect of various stressors such as social stress, changes in environmental parameters, or electric field stress on anxiety-like behaviors
  • 50-lux intensity in the light arms and 10-lux
  • 50-lux in
  • 50-lux intensity in the light arms and 10-lux
  • 10 minutes.
  • explore the maze for 10 minute
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