紫花芒花芽生长发育规律

用环剥摘叶法和石蜡切片法对紫花芒花芽生长发育规律进行研究,结果表明:紫花芒花芽生理分化期开始于末次梢停长后1 ～6周(11月初) ,到11月23日为止,75 %以上的芽完成了生理分化。形态分化始期为末次梢停长后3 ～4周(11月中旬) ,到第二年1月中下旬止,持续时间为60 ～75 d。从10月30日到11月6日为花芽未分化期或是处于叶芽期,11月16日至次年1月4日为花芽分化前期,11月16日至次年1月8日为花序分化期,12月21日至次年1月8日为花序第一分枝分化期,12月21日至次年1月14日为花序第二分枝分化期,1月8日至1月26日,开始花序基部的小花花器官的分化,先是花萼、花瓣的分化,接着为雄蕊、雌蕊、蜜盘的形成,此为花器官分化期。

Rule of growth and development on flower-bud of Mangifera indica cv.Zihuamang

The growth and development of mango(cv.Zihuamang)flower-bud were studied by using methods of girdinge,picking off leaves and paraffin section. The results showed that the physiological differentiation started after 1 to 6 weeks,in early November,when last mature shoots stop growing. More than 75% of buds passed the physiological differentiation stage until November 23th. Morphological differentiation stage began in middle November after the last mature shoots stop growing,until middle or late January in next year,and the morphological differentiation stage lasted for 60～75 days. Vegetative stage or the period of leaf bud was from October 30th to November 6th. Preceding differentiation of flower-bud was from November 16th to January 4th in next year. Inflorescence differentiation stage was from November 16th to January 8th in next year. The first branching of inflorescence was from December 21th to January 8th in next year. The second branching of inflorescence was from December 21th to January 14th in next year. The small flower organ of basal inflorescence began to differentiated from January 8th to January 26th in the next year. At first,the calyx and petal begin to differentiate ,and then the stamen,pistil and honey plate. It’s the differentiated period of flower organ.