Assessing the Effects of Water Deficit on Photosynthesis Using Parameters Derived from Measurements of Leaf Gas Exchange and of Chlorophyll a Fluorescence.

Abstract

Water deficit (WD) is expected to increase in intensity, frequency and duration in many parts of the world as a consequence of global change, with potential negative effects on plant gas exchange and growth. We review here the parameters that can be derived from measurements made on leaves, in the field, and that can be used to assess the effects of WD on the components of plant photosynthetic rate, including stomatal conductance, mesophyll conductance, photosynthetic capacity, light absorbance, and efficiency of absorbed light conversion into photosynthetic electron transport. We also review some of the parameters related to dissipation of excess energy and to rerouting of electron fluxes. Our focus is mainly on the techniques of gas exchange measurements and of measurements of chlorophyll a fluorescence (ChlF), either alone or combined. But we put also emphasis on some of the parameters derived from analysis of the induction phase of maximal ChlF, notably because they could be used to assess damage to photosystem II. Eventually we briefly present the non-destructive methods based on the ChlF excitation ratio method which can be used to evaluate non-destructively leaf contents in anthocyanins and flavonols.

Plant phenotyping relevance

植物の光合成・水分欠 deficit影響を評価するガス交換およびクロロフィル蛍光測定法と導出パラメータを中心にレビューしており、植物生理形質の取得手法が主題である。

Code and data availability

This is a review article on water deficit effects on photosynthesis parameters derived from gas exchange and chlorophyll fluorescence. The supplied blocks contain no public phenotype/trait datasets, plant images or sensor data, author analysis code, trained models, or supplements with such assets. All cited works are外部

No evidence-backed public reproduction asset is currently recorded.