脱落酸、多效唑和油菜素内酯对低温期间香蕉过氧化物酶和电导率的影响

在人工气候箱中模拟寒潮对香蕉幼苗造成的低温冷害 ,研究脱落酸、多效唑和油菜素内酯对低温胁迫期和低温胁迫恢复期香蕉幼苗叶片过氧化物酶和相对电导率的影响。试验表明 ,叶面喷施适量脱落酸、多效唑和油菜素内酯能够提高低温胁迫期和恢复期香蕉叶片的过氧化物酶活性并且降低叶片相对电导率。其最适浓度脱落酸为 2 0～ 2 5mg/ L;多效唑为 15～ 30 m g/ L;油菜素内酯为 0 .9～ 1.5m g/ L。

Effects of ABA,PP333 and BR on the POD activity and REC of leaves in banana plantlets

The plantlets of banana(Musa acuminate(AAA group)`Dwarf Cavendish`Brazil`)suffered from chilling stress under the artificial lowering of temperature in the phytotron. It is studied that ABA,PP 333 and brassinolide(BR)have some effects on the POD activity and REC of leaves in banana plantlets during the period of chilling stress. The experiments show that spraying ABA, PP 333 and Brassinolide on the leaves of banana plantlets can improve the peroxidase(POD)activity and reduce the relative electric conductivity(REC)at the period of chilling-stress and recovering. The appropriate concentration is ABA 20～25 mg/L,PP 333 15～30 mg/L, BR 0.9～1.5 mg/L?