三裂叶豚草雄花序分化过程的初步研究

三裂叶豚草为雌雄同株单性花植物，其花粉能引起多种致敏反应。主要研究三裂叶豚草雄花序发育过程形态变化。利用实体解剖镜和扫描电镜对三裂叶豚草(Ambrosia trifida L.)雄花序的分化过程进行观察。结果表明：三裂叶豚草雄花序分化过程分为3个阶段9个时期：营养生长阶段（未分化时期），雄花序原基分化阶段（生长点分化初始期、雄花序分化初期、雄花序原基初期、雄花序原基中期、雄花序原基末期），侧花序分化阶段（侧花序原基初期、侧花序原基中期、侧花序原基末期）。三裂叶豚草幼苗期即进行雄花序分化，植株最早只有一对叶时即开始进行分化。4~6对叶时侧花序开始分化。

Differentiation of the Male Inflorescences of Ambrosia trifida

Ambrosia trifida L. is a monoecism plant with unisexual flowers, allergic diseases were induced by which pollens. The primary research of this paper concentrates mainly on the differentiation of the male inflorescence. Using microscope and electron scanning microscope to observe the male differentiation process of Ambrosia trifida L.. The differentiation process was divided in 3 periods that include 9 stages: vegetative growth phase(undifferentiated stage), differentiation phase of the primordium of the male inflorescence(initial period of differentiated growth point,initial period of differentiated male inflorescence,initial period of the primordium of the male inflorescence, middle stage of the primordium of the male inflorescence, telophase of the primordium of the male inflorescence), the differentiation phase of lateral inflorescence (initial period of the primordium of the lateral inflorescence, middle stage of the primordium of the lateral inflorescence, telophase of the primordium of the lateral inflorescence), male flower differentiated stage. The male inflorescence of Ambrosia trifida L. begin differentiating in seedling stage,and the plant start to differentiate when it has a pair of leaves. The lateral inflorescence began to differentiate when plant had 4-6 pairs of leaves.