Responses of leaf stomatal and mesophyll conductance to abiotic stress factors

Plant photosynthesis assimilates CO_(2)from the atmosphere,and CO_(2)diffusion efficiency is mainly constrained by stomatal and mesophyll resistance.The stomatal and mesophyll conductance of plants are sensitive to abiotic stress factors,which affect the CO_(2)concentrations at carboxylation sites to control photosynthetic rates.Early studies conducted relevant reviews on the responses of stomatal conductance to the environment and the limitations of mesophyll conductance by internal structure and biochemical factors.However,reviews on the abiotic stress factors that systematically regulate plant CO_(2)diffusion are rare.Therefore,in this review,the rapid and long-term responses of stomatal and mesophyll conductance to abiotic stress factors(such as light intensity,drought,CO_(2)concentration and temperature)and their physiological mechanisms are summarized.Finally,future research trends are also investigated.

植物比叶质量研究进展

比叶质量(LMA)是叶片经济型谱中最基础的叶功能性状,也是重要的复合型结构参数。LMA不仅与植物的许多生理反应密切相关,而且能定量测定光合产物在单位叶面积的投入,因而被认为是反映植物生态策略的重要指标。目前,有关LMA的深入研究已在植物生态学、农学、林学、植物生理学领域全面展开。该文系统阐述了LMA在叶片整体、组织、细胞三个水平的结构解析和计算方法;重点分析了LMA对光合作用的影响;讨论了LMA的内在遗传差异以及外部的环境胁迫因子(温度、水分、光照)对LMA的影响,以期梳理比叶质量研究的思路、策略和方法,为今后的研究提供借鉴和参考。