玉米幼苗对NaCl胁迫的生理响应和耐受阈值分析  

An Analysis on the Responsiveness and the Tolerant Threshold of Maize Seedlings to NaCl Stress

作　　者：张欢欢[1] 马东方[1] 柏新富[1] 朱建军[1] 

机构地区：[1]鲁东大学生命科学学院,山东烟台264039

出　　处：《鲁东大学学报（自然科学版）》2013年第4期324-329,共6页Journal of Ludong University:Natural Science Edition

基　　金：山东省自然科学基金(ZR2012CM007);山东省高等学校科技计划(J09LC06)

摘　　要：以水培华农5号玉米（Zea mays L.var Huanong 5）幼苗为材料,综合分析了NaCl胁迫条件下幼苗的生理反应变化及其不同组织和生理过程的胁迫耐受阈值.结果表明：玉米叶片对NaCl胁迫最为敏感,耐受阈值约为150 mmol/L,且主要影响因素是气孔限制,非气孔限制因素对NaCl耐受性较强.PSⅡ的耐盐阈值在200～300 mmol/L之间.Using the hydroponically cultivated maize （Zea plant, the changes in physiological responses of maize mays L. var Huanong 5 ） seedlings as the model seedlings to salt stress and the physiological threshold of the different tissues and physiological process to salt stress were comprehensively analyzed. The results indicated that the leaf was most sensitive to NaCl stress and the tolerance threshold appeared at concentration of 150 mmol/L NaCl. The main influencing factor is stomatal limitation, but no stomatal limitation has higher tolerance to salt stress. PS 11 tolerant threshold to salt stress is between 200 -300 mmol/L.

关 键 词：盐胁迫 玉米 光合作用 根透性 耐盐阈值 

分 类 号：Q945.7[生物学—植物学]