S-3307和PP333对水稻秧苗促蘖效应的比较测定及其与植物内源激素关系的研究

Effect of S-3307 and PP333 on the Tillering of RiceSeedlings and Its Relation to Phytohormones

报道了Ｓ－３３０７和ＰＰ３３３对水稻秧苗促蘖效应的比较测定及其与植物内源激素关系的研究结果：（１）用４０μｇ／ｍＬＳ－３３０７和４００μｇ／ｍＬＰＰ３３３进行浸种处理的秧苗，在三叶一心期分别有６５．０１％和１９．７９％的植株出现分蘖，对照秧苗无分蘖出现，Ｓ－３３０７和ＰＰ３３３对水稻均有促蘖效应，而前者的促蘖效应大于后者。（２）经Ｓ－３３０７和ＰＰ３３３处理的秧苗以及对照秧苗，在三叶一心期的苗体内，每克鲜重ＣＴＫ含量分别为１３４６．４，８４２．４，８６．４ｐｍｏｌ／ｇ；ＣＴＫ／ＩＡＡ的比例分别为３．６９，２．５４，０．２９。在同期测定了秧苗体内可溶性糖、淀粉和全糖以及可溶性氮、蛋白质和全氮含量，它们在三种处理苗体内无明显差异。（３）本试验结果表明：Ｓ－３３０７对水稻的促蘖效应大于ＰＰ３３３，Ｓ－３３０７和ＰＰ３３３的促蘖效应与其提高水稻秧苗体内ＣＴＫ含量和ＣＴＫ／ＩＡＡ比例密切相关，其中Ｓ－３３０７提高ＣＴＫ含量和ＣＴＫ／ＩＡＡ比例的作用大于ＰＰ３３３，这一点与Ｓ－３３０７的促蘖效应大于ＰＰ３３３的结果是相吻合的。

Effects of S-3307 and PP333 on the tillering of rice seedlings and its relation to phytohormones were studied. (1) Soaking rice seeds in 40μg.ml -1 S-3307 and 400μg.ml -1 PP333 solution could facilitate tillering. When the rice seeds were soaked in S-3307 solution,PP333 solution and water, the tillering percentages were 65.01%,19.7% and 0 respectively at the stage of three mature leaves and one new leaf of rice seedlings. (2) The CTK contents were 1346.1pmol /g,842.4pmol /g and 86.4pmol /g (FW) respectively in rice seedlings treated with S-3307、PP333 and the check at the stage of three mature leaves and one new leaf, and the ratios of CTK /IAA were 3.69,2.54 and 0.29 respectively. However, the contents of soluble sugar,starch,total sugar and soluble nitrogen,protein,total nitrogen did not show significant difference in the above treated rice seedlings.