Contrasting dynamics of leaf potential and gas exchange during progressive drought cycles and recovery in Amorpha fruticosa and Robinia pseudoacacia

Abstract Leaf gas exchange is closely associated with water relations; however, less attention has been given to this relationship over successive drought events. Dynamic changes in gas exchange and water potential in the seedlings of two woody species, Amorpha fruticosa and Robinia pseudoacacia, we...

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Autores principales:	Weiming Yan, Shuxia Zheng, Yangquanwei Zhong, Zhouping Shangguan
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/bafc6e9212154f29ac5f47538da5f931
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spelling	oai:doaj.org-article:bafc6e9212154f29ac5f47538da5f9312021-12-02T15:05:18ZContrasting dynamics of leaf potential and gas exchange during progressive drought cycles and recovery in Amorpha fruticosa and Robinia pseudoacacia10.1038/s41598-017-04760-z2045-2322https://doaj.org/article/bafc6e9212154f29ac5f47538da5f9312017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04760-zhttps://doaj.org/toc/2045-2322Abstract Leaf gas exchange is closely associated with water relations; however, less attention has been given to this relationship over successive drought events. Dynamic changes in gas exchange and water potential in the seedlings of two woody species, Amorpha fruticosa and Robinia pseudoacacia, were monitored during recurrent drought. The pre-dawn leaf water potential declined in parallel with gas exchange in both species, and sharp declines in gas exchange occurred with decreasing water potential. A significant correlation between pre-dawn water potential and gas exchange was observed in both species and showed a right shift in R. pseudoacacia in the second drought. The results suggested that stomatal closure in early drought was mediated mainly by elevated foliar abscisic acid (ABA) in R. pseudoacacia, while a shift from ABA-regulated to leaf-water-potential-driven stomatal closure was observed in A. fruticosa. After re-watering, the pre-dawn water potential recovered quickly, whereas stomatal conductance did not fully recover from drought in R. pseudoacacia, which affected the ability to tightly control transpiration post-drought. The dynamics of recovery from drought suggest that stomatal behavior post-drought may be restricted mainly by hydraulic factors, but non-hydraulic factors may also be involved in R. pseudoacacia.Weiming YanShuxia ZhengYangquanwei ZhongZhouping ShangguanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Weiming Yan Shuxia Zheng Yangquanwei Zhong Zhouping Shangguan Contrasting dynamics of leaf potential and gas exchange during progressive drought cycles and recovery in Amorpha fruticosa and Robinia pseudoacacia
description	Abstract Leaf gas exchange is closely associated with water relations; however, less attention has been given to this relationship over successive drought events. Dynamic changes in gas exchange and water potential in the seedlings of two woody species, Amorpha fruticosa and Robinia pseudoacacia, were monitored during recurrent drought. The pre-dawn leaf water potential declined in parallel with gas exchange in both species, and sharp declines in gas exchange occurred with decreasing water potential. A significant correlation between pre-dawn water potential and gas exchange was observed in both species and showed a right shift in R. pseudoacacia in the second drought. The results suggested that stomatal closure in early drought was mediated mainly by elevated foliar abscisic acid (ABA) in R. pseudoacacia, while a shift from ABA-regulated to leaf-water-potential-driven stomatal closure was observed in A. fruticosa. After re-watering, the pre-dawn water potential recovered quickly, whereas stomatal conductance did not fully recover from drought in R. pseudoacacia, which affected the ability to tightly control transpiration post-drought. The dynamics of recovery from drought suggest that stomatal behavior post-drought may be restricted mainly by hydraulic factors, but non-hydraulic factors may also be involved in R. pseudoacacia.
format	article
author	Weiming Yan Shuxia Zheng Yangquanwei Zhong Zhouping Shangguan
author_facet	Weiming Yan Shuxia Zheng Yangquanwei Zhong Zhouping Shangguan
author_sort	Weiming Yan
title	Contrasting dynamics of leaf potential and gas exchange during progressive drought cycles and recovery in Amorpha fruticosa and Robinia pseudoacacia
title_short	Contrasting dynamics of leaf potential and gas exchange during progressive drought cycles and recovery in Amorpha fruticosa and Robinia pseudoacacia
title_full	Contrasting dynamics of leaf potential and gas exchange during progressive drought cycles and recovery in Amorpha fruticosa and Robinia pseudoacacia
title_fullStr	Contrasting dynamics of leaf potential and gas exchange during progressive drought cycles and recovery in Amorpha fruticosa and Robinia pseudoacacia
title_full_unstemmed	Contrasting dynamics of leaf potential and gas exchange during progressive drought cycles and recovery in Amorpha fruticosa and Robinia pseudoacacia
title_sort	contrasting dynamics of leaf potential and gas exchange during progressive drought cycles and recovery in amorpha fruticosa and robinia pseudoacacia
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/bafc6e9212154f29ac5f47538da5f931
work_keys_str_mv	AT weimingyan contrastingdynamicsofleafpotentialandgasexchangeduringprogressivedroughtcyclesandrecoveryinamorphafruticosaandrobiniapseudoacacia AT shuxiazheng contrastingdynamicsofleafpotentialandgasexchangeduringprogressivedroughtcyclesandrecoveryinamorphafruticosaandrobiniapseudoacacia AT yangquanweizhong contrastingdynamicsofleafpotentialandgasexchangeduringprogressivedroughtcyclesandrecoveryinamorphafruticosaandrobiniapseudoacacia AT zhoupingshangguan contrastingdynamicsofleafpotentialandgasexchangeduringprogressivedroughtcyclesandrecoveryinamorphafruticosaandrobiniapseudoacacia
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Contrasting dynamics of leaf potential and gas exchange during progressive drought cycles and recovery in Amorpha fruticosa and Robinia pseudoacacia

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