The Relationship Between Ascorbic Acid and Changes of Several Physiological and Biochemical Indexes in Isolated Wheat Leaves Under NaCl Stress

随着NaCl胁迫时间的延长和胁迫强度的增加,离体小麦叶片内抗坏血酸含量逐渐减少.活性氧清除剂(甘露醇、苯甲酸钠和巯基乙醇)处理可缓解由NaCl胁迫所引起的抗坏血酸含量下降.NaCl胁迫下,叶片内O2-和MDA含量增加,叶绿素和类胡萝卜素含量、叶绿体的Hill反应活力、叶片光合速率、叶片和线粒体呼吸速率均下降,而外源抗坏血酸对这些过程均有缓解作用.