Plant physiological response to environmental stress in semiarid ecosystems
半干旱生态系统植物对环境胁迫的生理反应
基本信息
- 批准号:288210-2011
- 负责人:
- 金额:$ 1.75万
- 依托单位:
- 依托单位国家:加拿大
- 项目类别:Discovery Grants Program - Individual
- 财政年份:2013
- 资助国家:加拿大
- 起止时间:2013-01-01 至 2014-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The frequency and severity of drought is expected to increase in western Canada during the next century as a consequence of climate disruption. To maintain the vitality of natural ecosystems, we must understand how different functional groups of plants cope with restricted water availability. Drought tolerance and avoidance strategies vary among tree, shrub and grass species in semiarid ecosystems. These differences are related to water-use efficiency (WUE), the ratio of leaf photosynthetic carbon gain to water loss by transpiration. High WUE plants have lower photosynthesis rates in full sunshine (Amax) and ideal moisture conditions, but continue to grow throughout summer drought. They co-occur with low WUE plants that have higher Amax. Low WUE plants are more opportunistic, growing rapidly during brief periods of soil moisture availability. They tend to have thinner leaves with higher nitrogen content and shorter lifespan. High WUE plants are more common among long-lived trees and woody shrubs than among herbaceous shrubs and grasses, but there are exceptions and WUE even differs within-species, due to seasonal changes in moisture availability, leaf age, leaf position in the canopy and the sex of dioecious plants. I will use advanced ecophysiological techniques, including photosynthetic gas-exchange, leaf reflectance, chlorophyll fluorescence, and stable carbon and hydrogen isotopes, to measure differences in drought response among functional types, among species, between sexes and along a canopy light extinction gradient. Studies will be carried out in riparian woodlands, coniferous forests and grasslands of Alberta. A key focus of my research is how mesophyll conductance, the diffusion conductance of carbon dioxide between internal leaf cavities and chloroplasts, influences WUE. My research is important for Canada, because it reveals physiological impacts of drought in semiarid ecosystems. Research outcomes will advance understanding of sensitive physiological indicators of ecosystem health and will be applied to renewal and conservation. Students will receive training in ecophysiology. This research effectively addresses NSERC's "Healthy Environment and Ecosystems" theme, targeted for increased funding.
由于气候受到破坏,预计下世纪加拿大西部干旱的频率和严重程度将增加。为了保持自然生态系统的活力,我们必须了解不同功能群的植物如何科普有限的水资源。在半干旱生态系统中,乔、灌、草物种的耐旱和避旱策略各不相同。这些差异与水分利用效率(WUE)有关,即叶片光合碳增益与蒸腾失水的比率。高WUE植物在全日照(Amax)和理想水分条件下的光合速率较低,但在整个夏季干旱期间继续生长。它们与具有较高Amax的低WUE植物共存。水分利用效率低的植物更具有机会性,在土壤水分可利用的短暂时期内生长迅速。它们往往有更薄的叶子,含氮量更高,寿命更短。高WUE植物在长寿的树木和木本灌木中比草本灌木和草中更常见,但也有例外,WUE甚至在物种内不同,这是由于水分供应,叶龄,叶在冠层中的位置和雌雄异株植物的性别的季节性变化。我将使用先进的生理生态学技术,包括光合气体交换,叶片反射率,叶绿素荧光,稳定的碳和氢同位素,测量干旱响应功能类型之间的差异,物种之间,性别之间和沿着冠层消光梯度。研究将在阿尔伯塔的河岸林地、针叶林和草地进行。我研究的一个关键焦点是叶肉导度,即二氧化碳在叶腔和叶绿体之间的扩散导度,如何影响WUE。我的研究对加拿大很重要,因为它揭示了干旱对半干旱生态系统的生理影响。研究成果将促进对生态系统健康的敏感生理指标的理解,并将应用于更新和保护。学生将接受生态生理学的培训。这项研究有效地解决了NSERC的“健康环境和生态系统”主题,旨在增加资金。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
数据更新时间:{{ journalArticles.updateTime }}
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
数据更新时间:{{ journalArticles.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ monograph.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ sciAawards.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ conferencePapers.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ patent.updateTime }}
Letts, Matthew其他文献
Letts, Matthew的其他文献
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
{{ truncateString('Letts, Matthew', 18)}}的其他基金
Plant physiological response to environmental stress in semiarid ecosystems
半干旱生态系统植物对环境胁迫的生理反应
- 批准号:
288210-2011 - 财政年份:2016
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Grants Program - Individual
Plant physiological response to environmental stress in semiarid ecosystems
半干旱生态系统植物对环境胁迫的生理反应
- 批准号:
288210-2011 - 财政年份:2014
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Grants Program - Individual
Plant physiological response to environmental stress in semiarid ecosystems
半干旱生态系统植物对环境胁迫的生理反应
- 批准号:
288210-2011 - 财政年份:2012
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Grants Program - Individual
Plant physiological response to environmental stress in semiarid ecosystems
半干旱生态系统植物对环境胁迫的生理反应
- 批准号:
288210-2011 - 财政年份:2011
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Grants Program - Individual
Climate Change Impacts and Adaptation Strategies in Mountain Watersheds of the Americas
美洲山区流域的气候变化影响和适应策略
- 批准号:
395986-2009 - 财政年份:2009
- 资助金额:
$ 1.75万 - 项目类别:
Strategic Research Networks Program Letters of Intent
Spatial and seasonal patterns patterns of plant physiological acclimation to environmental stress
植物生理适应环境胁迫的空间和季节模式
- 批准号:
288210-2005 - 财政年份:2008
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Grants Program - Individual
Spatial and seasonal patterns patterns of plant physiological acclimation to environmental stress
植物生理适应环境胁迫的空间和季节模式
- 批准号:
288210-2005 - 财政年份:2006
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Grants Program - Individual
Spatial and seasonal patterns patterns of plant physiological acclimation to environmental stress
植物生理适应环境胁迫的空间和季节模式
- 批准号:
288210-2005 - 财政年份:2005
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Grants Program - Individual
Spatial and seasonal patterns of plant physiological acclimation to environment stress
植物生理适应环境胁迫的空间和季节模式
- 批准号:
315674-2005 - 财政年份:2004
- 资助金额:
$ 1.75万 - 项目类别:
Research Tools and Instruments - Category 1 (<$150,000)
相似国自然基金
生理/病理应激差异化调控肝再生的“蓝斑—中缝”神经环路机制
- 批准号:82371517
- 批准年份:2023
- 资助金额:49.00 万元
- 项目类别:面上项目
羊草子株出生、发育及成穗的生理与分子机制
- 批准号:31172259
- 批准年份:2011
- 资助金额:56.0 万元
- 项目类别:面上项目
相似海外基金
AGS-PRF: The Physiological and Volatile Emission Stress Response of Leaves during and after Repeated Whole-Plant Ozone Exposure
AGS-PRF:全株臭氧反复暴露期间和之后叶片的生理和挥发性排放应激反应
- 批准号:
2306215 - 财政年份:2023
- 资助金额:
$ 1.75万 - 项目类别:
Fellowship Award
NSF Postdoctoral Fellowship in Biology FY 2021: The role of vegetative development on plant response to environmental stress from genomic and physiological perspectives
2021 财年 NSF 生物学博士后奖学金:从基因组和生理学角度看营养发育对植物对环境胁迫反应的作用
- 批准号:
2109780 - 财政年份:2022
- 资助金额:
$ 1.75万 - 项目类别:
Fellowship Award
Physiological response of quinoa to environmental stress: effects of nutritional profile, plant immunity, pest management and soil carbon content
藜麦对环境胁迫的生理反应:营养状况、植物免疫力、害虫管理和土壤碳含量的影响
- 批准号:
2743131 - 财政年份:2022
- 资助金额:
$ 1.75万 - 项目类别:
Studentship
Calcium coding mechanisms in plant cell growth and immunity
植物细胞生长和免疫中的钙编码机制
- 批准号:
10581257 - 财政年份:2020
- 资助金额:
$ 1.75万 - 项目类别:
Edible Plant-derived exosome-like nanoparticles (ELNs) and phage inhibit brain inflammation by targeting microglia and gut microbiota
食用植物源性外泌体样纳米粒子(ELN)和噬菌体通过靶向小胶质细胞和肠道微生物群抑制脑部炎症
- 批准号:
10492101 - 财政年份:2018
- 资助金额:
$ 1.75万 - 项目类别:
Development of plant-derived, resistance-breaking mosquitocides for controlling vectors of Zika virus
开发植物源性杀蚊剂来控制寨卡病毒载体
- 批准号:
9291272 - 财政年份:2017
- 资助金额:
$ 1.75万 - 项目类别:
Plant physiological response to environmental stress in semiarid ecosystems
半干旱生态系统植物对环境胁迫的生理反应
- 批准号:
288210-2011 - 财政年份:2016
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Grants Program - Individual
Analysis of physiological roles of the Plant post-Golgi organelle in stress response.
植物后高尔基体细胞器在应激反应中的生理作用分析。
- 批准号:
15H04627 - 财政年份:2015
- 资助金额:
$ 1.75万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Plant physiological response to environmental stress in semiarid ecosystems
半干旱生态系统植物对环境胁迫的生理反应
- 批准号:
288210-2011 - 财政年份:2014
- 资助金额:
$ 1.75万 - 项目类别:
Discovery Grants Program - Individual