摘要
在深圳市 ,‘石硖’龙眼 (DimocarpuslonganaLour.)“梢状芽”的生理分化期在 12月中旬至翌年 1月 ,花芽形态分化在 1月下旬开始 ,2月上旬整个“梢状芽”进入花序发育期 ,2月底进入小花分化期 .“梢状芽”的发育具可塑性 ,顶端与腋生分生组织的形态分化具独立性是发生“冲梢”的解剖学基础 ,“冲梢”时摘小叶能促进侧花序的抽生 .芽内较高水平的iPA、ABA含量和b(iPA) /b(GA1/ 3 )比值 ,以及叶片较高水平的总糖含量和b(C) /b(N)比值与花诱导有关 ,同时较高水平的b(iPA) /b(GA1/ 3 )、ABA和b(C) /b(N)与花序原基形成有关 .
In Shenzhen, flower bud physiological differentiation of‘SHIXIA’longan occurs between mid December and January of the next year,its morphogenesis differentiation beginning in late January. The whole‘shootlike bud’come into inflorescence development period in early February,and its flowerets differentiates in late February, the developmental plasticity of the‘shootlike bud’and the independence of flower bud morphogenesis between apical meristem and the axillary meristems are supposed to be the anatomical reasons for inflorescence‘flushing’. High levels of iPA and ABA, high b(iPA)/b(GA 1/3 ) ratio of buds,high levels of total sugar content and high b(C)/b(N) in leaves were related to flower induction. High ABA level,high b(iPA)/b(GA 1/3 ) and b(C)/b(N) were related to the formation of inflorescence.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2001年第1期27-30,共4页
Journal of South China Agricultural University
关键词
石硖龙眼
梢状芽
形态分化
内源激素
叶片营养
解剖结构
Dimocarpus longana Lour.
shootlike buds
morphogenesis
endogenous hormone
leaf nutrition
