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Xinjiang University (2021)

Responses of Water Transportation and Carbon Metabolism Characteristics in Haloxylon ammodendron and Alhagi sparsifolia to Drought Stress

王雅芸

Titre : Responses of Water Transportation and Carbon Metabolism Characteristics in Haloxylon ammodendron and Alhagi sparsifolia to Drought Stress

Auteur : 王雅芸

Grade : Master 2021

Université : Xinjiang University

Résumé partiel
Drought stress has always been the main factor affecting plant growth and death in arid and semi-arid areas.The response and adaptation of plants to drought stress has become one of the hotspots in plant physiology and ecology.Drought stress poses a serious threat to the homeostasis of plants.Because plants exchange with the atmosphere through photosynthesis,transpiration and other processes,and under drought stress,plants adapt to environmental changes by regulating stomata.This behavior makes plants face death from excessive carbohydrate consumption or hydraulic failure.Current studies have shown that plants reduce the effects of stomatal regulation on plants by changing the relationship between their traits and traits.Plant traits and their relationship can not only objectively describe the changes of plant internal physiological activities,but also clearly explain the internal and external changes of plants in the face of drought and the differences of drought response of different plants when the external environment changes.Haloxylon Ammodendron and Alhagi Sparsifolia is the dominant species of desert ecosystem,and it is drought resistant,saline alkali resistant and stress resistant plants.Both of them have the function of fixing sand dunes.Secondly,Haloxylon ammodendron and Alhagi Sparsifolia have higher ecological benefits and economic value.In this paper,Haloxylon ammodendron and Alhagi Sparsifolia in Ebinur Lake Nature Reserve were selected as the research objects.The morphological traits,hydraulic traits and carbon metabolism related traits(Photosynthetic parameters and Non structural carbon)of Haloxylon ammodendron and Alhagi Sparsifolia were measured outdoor on three drought gradients.Then,the differences between Haloxylon ammodendron and Alhagi Sparsifolia in response to drought were explored by using ANOVA,multiple comparison,principal component analysis and other methods

Mots clés : hydraulic trait ;carbon metabolism ;hydraulic failure ;Alhagi Sparsifolia ;adaptive strategy of drought ;

Présentation (CNKI)

Page publiée le 13 mars 2022