锌钼营养对苦瓜产量、叶片多胺、激素含量与活性氧代谢的影响

Effects of Zinc and Molybdenum Nutritions on Yields, Polyamines, Hormone Contents and Active Oxygen Metabolism in Leaves of Balsam Pear （Momordica charantia cv. Zhuzhou Changbai）

摘要:

苦瓜(株洲长白Momordicacharantiacv.ZhuzhouChangbai)叶片喷施硫酸锌和钼酸钠均可显著增加苦瓜产量,提高叶片多胺(PAs)、抗坏血酸(ASA)、吲哚乙酸(IAA)、赤霉素(GA₃)含量以及超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)的活性,减少脱落酸(ABA)、丙二醛(MDA)含量和自动氧化速率(AOR),从而抑制膜脂过氧化,延缓叶片衰老。苦瓜产量与叶片IAA、GA₃、PAs、SOD、POD、CAT呈极显著正相关,而与MDA、AOR、ABA呈极显著负相关,叶片MDA含量与ABA、AOR呈极显著正相关,而与PAs、IAA、GA₃、SOD、POD、CAT呈显著负相关。

Abstract:

Spraying ZnSO₄·7H₂O and Na₂MoO₃·2H₂O on the leaves of balsam pear (Momordica charantia cv. Zhuzhou Changbai) grown in the field could significantly increase the yield of balsam pear and the contents of polyamines (PAs), putrescine (Put), spermidine (Spd), spermine (Spm), indole acetic acid (IAA), gibberellic acid (GA₃) and ascorbic acid (ASA) and the activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) in the leaves. It also reduced malondialdehyde (MDA), abscisic acid (ABA) content and autoxidation rate (AOR)in leaves，which inhibited membrane lipid peroxidation and retarded the senescence of leaves．The statistics analysis showed a significant positive correlation between yields and IAA，GA₃，PAs，SOD，POD，CAT， but a significant negative corelation between yields and MDA，AOR,ABA．Whereas in the leaves，the content of MDA was positively related to the contents of ABA and AOR，but negatively to those of PAs，IAA ，GA₃，SOD，POD and CAT．