"川中岛"白桃雄性不育小孢子发育的细胞形态学

“川中岛”白桃是 2 0世纪 90年代初期从日本引进的优良晚熟品种 ,系日本长野县池田正元以“上海”ד白桃”杂交育种 .在生产中发现该品种花粉少、无发芽力 ,需配置授粉树 ,属于雄性败育品种1～ 3 ] .关于“川中岛”白桃花粉败育的途径、机制尚未见报道 ;因此 ,对其小孢子发生发育细胞学特征进行观察研究 ,以揭示其雄性败育的途径 .1　材料与方法1.1　材料2年生盆栽”川中岛”白桃和对照品种庆丰 .1.2　方法为了避免早春低温等不适的环境因子对桃花器官发育造成不良的影响 ,试验在控制环境条件下进行 ,即在人工生长箱内对 2年生盆栽庆丰 …

CYTOMORPHOLOGY OF MICROSPOROGENESIS IN MALE STERILE OF "CHUANZHONGDAO" WHITE PEACH

The cytomorphology of microsporogenesis in male fertility and male sterile of peaches was studied under controlled conditions. The results showed that "Chuanzhongdao" White Peach had no obvious differences from microsporcyte meiosis, tetrads to mononuclear spherical microspores from male fertility variety. Microspores began to abort at its further development, that is,the nucleus disappeared, the cytoplasm reduced and became light staining , and the empty pollen grains were produced at last. The tapetum, endothecium and middle layer of anthers developed abnormally at later stage, which expressed that the tapetum cells did not disintegrate completely; the middle layer cells enlarged; and the endothecium cells lengthened radially early, but there were no fibrous thickenings in the endothecium cells. Plate 1, Ref 13