摘要
测定了银杏雌株和雄株实生树内源激素及核酸含量在生长季节的变化。结果表明，在３月上旬芽膨大时芽尖中赤霉素（ＧＡ３）含量已达高峰，随后急剧下降，到９月中下旬降到最低点。６月上旬芽尖中玉米素（ＺＴ）含量升到最高值，生长素（ＩＡＡ）则降到最低点，而脱落酸（ＡＢＡ）减少到检测水平以下。分析显示，银杏雌雄株间内源激素和核酸的变化在含量水平上有一定差异。雌株的ＧＡ３和ＺＴ含量高于雄株；ＩＡＡ和ＡＢＡ则低于雄株。雌雄株叶片中内源激素变化趋势与芽尖中的变化相似。６月上旬以前雄株芽尖中核酸含量高于雌株，８月上旬以后则相反，雌株超过雄株。讨论了激素水平差异与花芽分化和银杏性别的相关及其可能原因。
The
content of endogenous hormones and nucleic acids in the bud tip of Ginkgo biloba,both
female plant and male plant,was measured.The results showed that content of GA3 in
bud tip ofthe female was higher than the male by 26%,at the time of differentiation of
floral buds,followed then by a decrease in content which was still higher in the female
than in the male.When floral buds differentiating,the female was higher than the male
by 71% in content of ZT,while the male had a content of IAA higher than the female by
25%.In the light of nucleic acids content,the female was more than the male at the time
of differentiation of floral buds.This analysis indicated that the female differed apparently
from the male in content of endogenous hormones and nucleic acids.In addition,the
relationship between plant sex and variations in endogenous homones and nucleic acids
wa
出处
《浙江林学院学报》
CSCD
1999年第2期114-118,共5页
Journal of Zhejiang Forestry College
基金
浙江省自然科学基金
关键词
银杏
植物激素
核酸
变化
Ginkgo biloba
phytohormones
nucleic acids
changess discussed.
