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General relations of stomatal responses to xylem sap abscisic acid under stress in the rooting zone - A global perspective

机译:生根区胁迫下气孔对木质部汁液脱落酸反应的一般关系-全球视角

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摘要

A sensitivity factor that quantifies the responsiveness of stomata to xylem sap abscisic acid concentration ([ABA](xy1)) is described, using the relation between [ABA](xy1) and maximum leaf conductance (g(max)). Plotting g(max) against this factor results in a common linear relationship for woody and herbaceous species from boreal to (semi-) and climates. The global distribution of the sensitivity factor reveals an unexpected pattern which is inverse to rainfall, i.e., plants in humid climates respond more sensitively to ABA than plants in arid areas. The implications for the response of natural vegetation and consequences for agriculture are discussed. (C) 2007 Elsevier GmbH. All rights reserved.
机译:利用[ABA](xy1)和最大叶片电导率(g(max))之间的关系,描述了量化气孔对木质部汁液脱落酸浓度([ABA](xy1))的响应度的敏感性因子。针对该因子绘制g(max)导致从北方到(半)和气候的木本和草本物种的共同线性关系。敏感性因子的全球分布揭示了一种与降雨成反比的意想不到的模式,即,与干旱地区的植物相比,潮湿气候下的植物对ABA的反应更为敏感。讨论了对自然植被的响应及其对农业的影响。 (C)2007 Elsevier GmbH。版权所有。

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