三唑酮提高水稻幼苗抗旱性的研究

在-0.5MPa渗透胁迫下三唑酮提高水稻(Oryza sativa L.)幼苗相对含水量,降低丙二醛(MDA)含量,提高了抗旱性。三唑酮(75mg/L)可提高渗透胁迫下水稻幼苗过氧化物酶(POD)和过氧化氢酶(CAT)活性,对超氧物歧化酶(SOD)活性影响不大。加入蛋白质合成抑制剂环己亚胺试验证明,三唑酮对POD的效应是促进酶蛋白的合成。

PROMOTIVE EFFECT OF TRIADIMEFON ON DROUGHT RESISTANCE OF RICE SEEDLINGS

Triadimefon increased the relative water content and decreased malondialdehyde (MDA) content under osmotic stress of -0.5 MPa induced by PEG-6000. The activities of peroxidase (POD) and catalase (CAT) were induced by triadimefon at a concentration of 75 mg/L by root treatment under osmotic stress,but the superoxide dismutase (SOD) activity remained unchanged. Addition of cycloheximide, an inhibitor of protein synthesis, indicated that the activation of POD induced by triadimefon was due to the promotive effect of de novo enzyme synthesis. No effect of triadimefon on POD isozyme pattern was demonstrated on PACE.