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Accueil du site → Doctorat → Chine → 2021 → Physiological and Biochemical Mechanisms for Water,Nitrogen and Elevated CO2 Impact on Barley and OatsCN

Académie chinoise des sciences agricoles

Physiological and Biochemical Mechanisms for Water,Nitrogen and Elevated CO2 Impact on Barley and OatsCN

李丽

Titre : Physiological and Biochemical Mechanisms for Water,Nitrogen and Elevated CO2 Impact on Barley and OatsCN

Auteur : 李丽

Grade : Doctoral Dissertation 2021

Université : Académie chinoise des sciences agricoles

Résumé partiel
Soil drought is often accompanied by low soil nitrogen(N)use efficiency,and reasonable water and N management is important to improve crop water and N use efficiency.Stomata regulate the exchange of gases between plants and atmosphere,and they are important in controlling the two physiological processes of photosynthesis and transpiration.Therefore,exploring the regulatory mechanism of stomatal movement is of great significance to understand the response of crops to environmental stress.In recent years,the atmospheric CO2 concentration has been increasing.Under the condition of climate change in the future,how to manage water and fertilizer reasonably will be a new problem and challenge in agricultural production.Therefore,in the present study,oat and barley(WT and its correspondent ABA-deficient mutant barley Az34)were used as plant materials,and 15 N,13C,18 O isotope techniques were used to analyze the phenotypic and physiological/biochemical changes of oat under drought and N deficiency stress ;the ion fluxes of barley mesophyll/ guard cells were measured by noninvasive micro-test technology(NMT)to quantitatively record and the transmembrane movement of ions,and the mechanisms of phenotypic changes were explored in subcellular and molecular levels combining with the proteomic analysis of leaves ;the physiological response of barley to N-fertigation and its behind physiological mechanisms were studied at elevated CO2,and the quality attributes of barley seeds were analyzed,which would provide theoretical basis for achieving water-saving,fertilizer-saving,high-quality and high-yield agriculture under elevated atmospheric CO2 concentration and water shortage in the future.

Mots clés : The interaction between drought stress and N deficiency ;Elevated CO2 ;Physiological mechanism ;Yield;Water/N use efficiency ;

Présentation (CNKI)

Page publiée le 19 février 2022