S－3307对油菜幼苗内源激素IAA、ABA及ZT含量水平的影响

Effects of S-3307 on the levels of endogenous hormones (IAA、ABA、ZT) and some physiological characteristics of rape seedlings:

本文研究了Ｓ－３３０７对油菜幼苗内源ＩＡＡ、ＡＢＡ和ＺＴ水平的影响，并就幼苗的形态效应和某些生理特性进行探讨。结果表明，三叶期叶面喷施Ｓ－３３０７后，内源脱落酸的水平处理与对照无差异，生长素水平下降，而玉米素水平明显提高；试验结果还表明，三叶期喷施２５－７５ｍｇ／Ｌ浓度Ｓ－３３０７能防止高脚苗，提高叶绿素含量，促进根系生长，增加根系氧化力，增加干物质重量；其在油菜生产中的适用浓度为５０ｍｇ／Ｌ。

Effects of S-3307 on the levels of endogenous hormones (IAA、ABA、ZT) and some physiological characteristics of rape seedlings were studied. As a result of applying S-3307 at rape three-leaf stage, the level of endogenous ABA was similar to control; however, the level of indole-3-acetic acid was decreased, while the level of zeatin was obviously increased in the shoot of rape seedings. The results also indicated that foliar sprays of 25-75 S-3307 mg/L reduced seedling height, increased leaf chlorophyll content, root oxidizability and total dry matter of rape seedlings. The optimum concentration of S-3307 for rape production was 50 mg/L.