Effect of vapour pressure deficit on gas exchange of field‑grown cotton

作     者：BROUGHTON Katrina J. PAYTON Paxton TAN Daniel K.Y. TISSUE David T. BANGE Michael P. BROUGHTON Katrina J;PAYTON Paxton;TAN Daniel K.Y;TISSUE David T;BANGE Michael P

作者机构：CSIRO Agriculture and FoodLocked Bag 59NarrabriNSWAustralia Plant Breeding InstituteSydney Institute of AgricultureSchool of Life and Environmental SciencesFaculty of ScienceUniversity of SydneySydneyNSWAustralia Hawkesbury Institute for the EnvironmentHawkesbury CampusWestern Sydney UniversityPenrithNSWAustralia United States Department of AgricultureCropping Systems Research LaboratoryLubbockTXUSA 

出 版 物：《Journal of Cotton Research》 (棉花研究（英文）)

年 卷 期：2021年第4卷第4期

页      面：337-346页

学科分类：09[农学] 0901[农学-作物学] 

基　　金：supported by CSIRO the Cotton Catchment Communities Co-operative Research Centre the Australian Cotton Research and Development Corporation(CRC 1101) the Australian Postgraduate Award 

主　　题：Climate change Gossypium hirsutum Physiology VPD 

摘      要：Background:Plants respond to changes in vapour pressure deficit(VPD)between the leaf and the atmosphere through changes in stomatal response,which can consequently affect transpiration,photosynthesis,and leaf-level water use *** projected warmer air temperatures,changes in rainfall distribution and altered VPD in future climates,it is important to understand the potential effect of VPD on leaf-level physiology of field-grown *** aim of this study was to assess the impact of altered VPD on leaf-level physiology of field-grown cotton to improve the current understanding of the plant-by-environment interaction,thereby contributing to validation and improvement of physiological and yield response *** VPD environments in the field were generated by planting cotton on three dates within the sowing window(early-season(S1)=5th October 2011;mid-season(S2)=9th November 2011;and late-season(S3)=30th November 2011).VPD was also modified by altering crop ***:VPDL accounted for the largest proportion of the explained variation in both stomatal conductance(32%∼39%)and photosynthetic(16%∼29%)responses of ***,smaller percentages of variation were attributed to other main factors such as the individual plant(Plant),and accumulated temperature stress hours(ASH;a measure of plant water status over time)and interactive factors,including leaf vapour pressure deficit(VPDL)×Plant and Plant×ASH;however,a proportion of variation was *** addition,the Asat/E(instantaneous transpiration efficiency,ITE)model developed based on cotton grown in the glasshouse was applied to cotton grown in the *** found that the modelled Asat/E and field-measured Asat/E were very similar,suggesting that the mechanistic basis for ITE was similar in both ***:This study highlights the importance of accounting for VPD in climate change research,given that stomata are highly responsive to changes in *** experiment pr