辣椒核型雄性不育系小孢子发生的细胞形态学研究

以辣椒核型雄性不育两用系AB154和AB兖1691为试材，对不育株和可育株小孢子的不同发育时期进行了细胞学比较分析。结果表明不育株小孢子败育发生在四分体小孢子形成以前，靠近小孢子的一层绒毡层细胞在小孢子母细胞期已解体，其余绒毡层细胞在花粉粒成熟期仍然结构完整；可育株绒毡层在单核花粉粒期开始解体，花粉粒成熟期时完全解体。不育株花药药隔维管束发育滞后于可育株，退化却早于可育株。部份绒毡层提前解体和药隔维管束发育异常使小孢子正常发育所需要的营养物质供应受阻，可能是造成小孢子败育的重要原因。

Cytological Studieson Microsporogenesis ofNuclear Male Sterility of Pepper (Capsicum annuum L.

Comparison and cytological characteristics analysis were conducted during the stages of microsporogenesis between sterile plants and fertile plants of nuclear male sterility (NMS)two-line systems of pepper(Capsicum annuum L.),AB154 and AB1691.The results showed that abortion of microspore occured before tetrads formed.Tapetal cells of sterile an- thers near microsporocytes decomposed,other tapetal cells persisted until the stage of mature pollen.In contrast,tapetal cells of fertile anthers began to degenera...