论文部分内容阅读
在５ｍＳｃｍ－１和１０ｍＳｃｍ－１ＮａＣｌ胁迫过程中，大白菜幼苗根系膜透性、ＴＴＣ还原能力和丙二醛含量的变化显示根受到不同程度伤害。盐胁迫处理下，根系对钙的吸收速率在〔Ｃａ２＋〕＞０７５ｍｍｏｌ／Ｌ时明显受到抑制。根系对４５Ｃａ２＋的积累能力分别在５ｍＳｃｍ－１ＮａＣｌ胁迫５ｈ和１０ｍＳｃｍ－１ＮａＣｌ胁迫３ｈ后受到抑制，而且大白菜各器官（根、茎、叶）对４５Ｃａ２＋的吸收、转运能力在盐胁迫下发生不同程度下降，其中叶对盐胁迫反应最敏感。盐胁迫条件下，叶片各部位４５Ｃａ２＋积累明显减少，其中叶缘反应最为敏感。
During 5mScm-1 and 10mScm-1NaCl stress, the changes of membrane permeability, TTC reducing ability and MDA content in roots of Chinese cabbage seedlings showed that roots were damaged to some extent. Under salt stress, the rate of calcium uptake by roots was significantly inhibited when [Ca2 +]> 075 mmol / L. The accumulation of 45Ca2 + in roots was inhibited by 5mScm-1NaCl for 5h and 10mScm-1NaCl for 3h, respectively. However, the absorption and transport of 45Ca2 + by organs (roots, stems and leaves) of Chinese cabbage were reduced to some extent under salt stress , Of which the leaves of the most sensitive to salt stress response. Under salt stress conditions, the accumulation of 45Ca2 + in all parts of leaves significantly decreased, and the leaf edge reaction was the most sensitive.