Integration of plant responses to multiple stressors over time: interactions between winter and summer

随着时间的推移植物对多种应激源的反应的整合：冬季和夏季之间的相互作用

基本信息

批准号：
RGPIN-2015-06178
负责人：
Henry, Hugh
金额：
$ 3.57万
依托单位：
University of Western Ontario
依托单位国家：
加拿大
项目类别：
Discovery Grants Program - Individual
财政年份：
2017
资助国家：
加拿大
起止时间：
2017-01-01 至 2018-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=630239
关键词：
Integration plant responses multiple stressors

项目摘要

Response to multiple stresses has been a key topic in plant research, particularly in the context of global environmental change. While there has been a focus on plant responses to stresses that occur simultaneously, such as drought and heat stress, interactions between stresses also can occur sequentially in time. In some cases changes in the physiology of a plant in response to an initial stress can decrease vulnerability to future stress. However, in contrast to the potential benefits of this 'stress memory,' declines in plant condition in response to the initial stress can decrease the ability to tolerate future stress. Such interactions between multiple stresses have been studied extensively in the context of the growing season. In contrast, studies of carryover effects of winter stress on summer stress responses are lacking, despite the potential for variability in winter conditions to influence plant growing season performance substantially. Synergies between plant responses to variability in winter conditions and stress tolerance over summer are further complicated when examined in an ecosystem context. For example, frost not only has the potential to damage overwintering plants, but it also can affect soil microorganisms, nutrient availability, soil physical properties and moisture, and the interactions of these factors need to be accounted for when examining overall plant responses.

对多种压力的反应一直是植物研究中的一个关键主题，尤其是在全球环境变化的背景下。尽管虽然植物对同时发生的应力的反应（例如干旱和热应激）的反应，但应力之间的相互作用也可以依次发生。在某些情况下，由于初始压力，植物生理学的变化会减少对未来压力的脆弱性。但是，与这种“压力记忆”的潜在益处相反，植物状况下的响应初始压力的下降可以降低忍受未来压力的能力。在生长季节的背景下，已经对多种压力之间的这种相互作用进行了广泛的研究。相比之下，尽管缺乏对冬季压力对夏季压力反应的结转影响的研究，尽管冬季条件下有可能影响植物生长季节的表现，但仍缺乏对夏季压力反应的反应。在生态系统环境中检查植物对变异性的植物对变异性的反应与夏季的压力耐受性之间的协同作用更加复杂。例如，弗罗斯特不仅有可能损害越冬的植物，而且还会影响土壤微生物，养分可用性，土壤物理特性和水分，并且在检查整体植物反应时需要考虑这些因素的相互作用。