The interaction between aluminium toxicity and drought stress in common bean (Phaseolus vulgaris L.) [Elektronische Ressource] : physiological and molecular aspects / Zhongbao Yang

The Interaction between Aluminium Toxicity and Drought Stress in Common Bean (Phaseolus vulgaris L.) Physiological and Molecular Aspects Von der Naturwissenschaftlichen Fakultä t der Gottfried Wilhelm Leibniz Universitä t Hannover zur Erlangung des Grades Doktor der Naturwissenschaften Dr. rer. nat. genehmigte Dissertation von Master of Agriculture Zhongbao Yang geboren am 28.11.1979 in Tancheng, VR China 2011 Referent: Prof. Dr. rer. agr. Walter J. Horst Gottfried Wilhelm Leibniz Universitä t Hannover Korreferent: Prof. Dr. rer. nat. Hans-Peter Braun Gottfried Wilhelm Leibniz Universitä t Hannover Tag der Promotion: 07.Juli 2011 ABSTRACT Aluminium (Al) toxicity and drought are two major abiotic stress factors limiting common bean (Phaseolus vulgaris L.) production in the tropics. The Al-impeded root growth may strongly limit the water exploitation of roots from subsoil and thus less ability to withstand drought stress in the acid soils. In light of the importance of root development under Al toxicity and drought stress, in this study the short-term effects of combined Al toxicity and drought stress on root growth with special emphasis on physiological and molecular mechanisms in the root apex was investigated.