【摘要】 研究了外源ABA对NaCl胁迫下黄瓜幼苗不同器官中Na+、Cl-、K+和Ca2+含量的影响。结果表明,NaCl胁迫下,黄瓜幼苗体内Na+、Cl-含量升高;叶片中K+、Ca2+含量下降,Na+/K+、Na+/Ca2+增大,SK、Na、SCa、Na降低。外源ABA减少了叶片、根中Na+、Cl-的积累,抑制了叶片K+、Ca2+含量的降低,提高了K+、Ca2+的吸收和运输选择性。外源ABA可通过调控盐胁迫下植株体内的离子平衡,提高黄瓜幼苗的耐盐性。更多还原

【Abstract】 The experiment was performed to study the effects of exogenous ABA on Na+,Cl-,K+,Ca2+ contents in different organs of cucumber(Cucumis sativus L.)seedlings under NaCl stress.Results showed that Na+ and Cl-contents increased while K+ and Ca2+ contents of leaves decreased,Na+/K+ and Na+/Ca2+ increased,SK、Na and SCa、Na decreased in NaCl-treated cucumber seedlings.Cucumber seedlings treated with exogenous ABA combined with salinity showed higher levels of K+ and Ca2+ accumulation of leaves and lower levels of Na+ and Cl-accumulation of leaves and root.Exogenous ABA could improve the absorbing selectivity of K+ and Ca2+,thus to enhance the salt tolerance of cucumber seedlings.更多还原