YangPengZhuEtAl2019

Référence

Yang, B., Peng, C., Zhu, Q., Zhou, X., Liu, W., Duan, M., Wang, H., Liu, Z., Guo, X., Wang, M. (2019) The effects of persistent drought and waterlogging on the dynamics of nonstructural carbohydrates of robinia pseudoacacia l. Seedlings in northwest china. Forest Ecosystems, 6(1). (Scopus )

Résumé

Background: The nonstructural carbohydrates (NSCs) of plants are posited to be crucial traits for the resistance and resilience of plants to climate change-induced drought and flooding. However, the potential effects of persistent drought and waterlogging on the dynamics of the NSCs and the underlying mechanisms are still poorly understood. Methods: We measured the NSCs concentrations and pool size, photosynthetic rate and biomass of Robinia pseudoacacia L. seedlings for both 2015 and 2016 under five soil water treatments: 3%, 8%, 17%, 24% and 34% soil water content, representing extreme drought (ED), moderate drought (MD), the control group (CG), field capacity (FC) and waterlogging (WL) stresses, respectively. We observed the relationship between the pool size of NSCs and the survival of seedlings under water stress (drought and waterlogging) for 30 days in greenhouse. Results: Compared with CG, the net photosynthetic rate decreased 91%, 67%, 34% and 71%, and the biomass decreased by 37%, 15%, 16% and 33% under ED, MD, FC and WL, respectively. The total NSC (TNSC) concentration was significantly increased by 154% under ED after 10 days and sharply decreased by 50% under ED after 30 days. The concentrations of soluble sugars (SS) were significantly increased by 100% under MD after 10 days and sharply decreased by 60% under ED after 30 days. Compared with GC, the response of NSCs, photosynthetic rate and biomass under ED were more dramatic than that under WL. The pool sizes of fructose and sucrose were larger under ED and WL, but the maximum pool size of starch occurred under the CG. The depletion of NSCs was not observed under ED at the end of the experiments in both 2015 and 2016. Conclusions: Our results indicate that the dynamics of NSCs is an important physiological feature of plant adaptation and resistance to drought and waterlogging. In addition, high sugars concentrations are beneficial for the plants during the short-term extreme drought and the longer term mild drought or waterlogging. © The Author(s). 2019.

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@ARTICLE { YangPengZhuEtAl2019,
    AUTHOR = { Yang, B. and Peng, C. and Zhu, Q. and Zhou, X. and Liu, W. and Duan, M. and Wang, H. and Liu, Z. and Guo, X. and Wang, M. },
    TITLE = { The effects of persistent drought and waterlogging on the dynamics of nonstructural carbohydrates of robinia pseudoacacia l. Seedlings in northwest china },
    JOURNAL = { Forest Ecosystems },
    YEAR = { 2019 },
    VOLUME = { 6 },
    NUMBER = { 1 },
    NOTE = { cited By 0 },
    ABSTRACT = { Background: The nonstructural carbohydrates (NSCs) of plants are posited to be crucial traits for the resistance and resilience of plants to climate change-induced drought and flooding. However, the potential effects of persistent drought and waterlogging on the dynamics of the NSCs and the underlying mechanisms are still poorly understood. Methods: We measured the NSCs concentrations and pool size, photosynthetic rate and biomass of Robinia pseudoacacia L. seedlings for both 2015 and 2016 under five soil water treatments: 3%, 8%, 17%, 24% and 34% soil water content, representing extreme drought (ED), moderate drought (MD), the control group (CG), field capacity (FC) and waterlogging (WL) stresses, respectively. We observed the relationship between the pool size of NSCs and the survival of seedlings under water stress (drought and waterlogging) for 30 days in greenhouse. Results: Compared with CG, the net photosynthetic rate decreased 91%, 67%, 34% and 71%, and the biomass decreased by 37%, 15%, 16% and 33% under ED, MD, FC and WL, respectively. The total NSC (TNSC) concentration was significantly increased by 154% under ED after 10 days and sharply decreased by 50% under ED after 30 days. The concentrations of soluble sugars (SS) were significantly increased by 100% under MD after 10 days and sharply decreased by 60% under ED after 30 days. Compared with GC, the response of NSCs, photosynthetic rate and biomass under ED were more dramatic than that under WL. The pool sizes of fructose and sucrose were larger under ED and WL, but the maximum pool size of starch occurred under the CG. The depletion of NSCs was not observed under ED at the end of the experiments in both 2015 and 2016. Conclusions: Our results indicate that the dynamics of NSCs is an important physiological feature of plant adaptation and resistance to drought and waterlogging. In addition, high sugars concentrations are beneficial for the plants during the short-term extreme drought and the longer term mild drought or waterlogging. © The Author(s). 2019. },
    AFFILIATION = { Center for Ecological Forecasting and Global Change, College of Forestry, Northwest A&F University, YanglingShaanxi 712100, China; Department of Biology Sciences, Institute of Environment Sciences, University of Quebec at Montreal, C.P. 8888, Succ. Center-Ville, Montreal, H3C 3P8, Canada; State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Institute for Peat and Mire Research, Northeast Normal University, Changchun, Jilin 130024, China },
    ART_NUMBER = { 23 },
    AUTHOR_KEYWORDS = { Carbon pool; Soil water; Starch; Sugars; Tree mortality; Whole-tree },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1186/s40663-019-0181-3 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85066296707&doi=10.1186%2fs40663-019-0181-3&partnerID=40&md5=b69aa1c981f6af0825a7f2712271eb08 },
}

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