多效唑对双瓣茉莉新梢生长及叶片光合作用的影响

Effect of PP_(333) Treatment on New Shoot Growth and Leaf Photosynthesis of Jasminum sambac L.

以盆栽双瓣茉莉为试材,研究了喷施不同浓度的多效唑对双瓣茉莉新梢生长发育与叶片光合速率的影响。结果表明：多效唑处理显著的抑制双瓣茉莉新梢的长度、增加新梢的直径,且随着处理浓度的增加,其作用效果越明显。此外,多效唑还显著的抑制双瓣茉莉叶片的生长和发育,增加叶片的叶绿素含量,并且显著提高叶片的光合作用。喷施多效唑的有效期持续在30~50d且较适合的浓度为200~300mg/L。

Taking Jasminumsarmbac L. （double petal） as test material,the effect of paclobutrazol （PP333） on new shoot growth and leaf photosynthesis rate of Jasminum sambac L. （double petal） were analyzed by using foliar spray method. The results showed that PP3,3 significantly inhibited the new shoot growth and increased the young sprout diameter with a dose-dependent way when compared with the control treatment. Moreover, PP333 treatment also reduced the leaf growth,increased chlorophyll content and leaf photosynthesis rate of Jasminum sambac L.. Additionally, the effective period of PP333 maintained about 30--50 days after leaf spraying and the most suitable concentration of PP333 might between 200--300 mg/L.