Cytologic Observations on Microspore Development of FS1030A,a Cytoplasmic Male Sterile Line in Capsicum annum L.

doi:10.3969/j.issn.1000-7091.2012.05.024

Abstract

Abstract: Transmission Electronic Microscopy(TEM) technique was used to observe the abortive stages and ways of FS1030A,a cytoplasmic male sterile line(CMS) in Capsicum annum L.and its maintainer line FS1030B.The results showed that the abortion occurred before tetrads came into being,and two kinds of main structural changes in the tapetum were observed in CMS FS1030A.First during the meiosis of microspore mother cells(MMCs),some of the tapetal cells were enlarged,elongated and developed into multilayer cells.They squeezed the MMCs excessively which narrow the powder chamber much.The MMCs degenerated,vanished and failed to develop into tetrads,eventually leading to microspore abortion.Second some of the premature tapetal cell layer degenerated,and then the remnants of the collapsed tapetum and crushed MMCs formed a visible dense belt in the anther locule.The MMCs presented irregular shapes,and eventually degenerated due to the lack of nutrition.

Key words: Capsicum annum, L Cytoplasmic male sterility(CMS), TEM Tapetum

CLC Number:

S641.3

ZHANG Ling-ling, ZHANG Xiao-fen, CHEN Bin, SUN Yan, HAN Hua-li, GENG San-sheng. Cytologic Observations on Microspore Development of FS1030A,a Cytoplasmic Male Sterile Line in Capsicum annum L.[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2012, 27(5): 122-126. doi: 10.3969/j.issn.1000-7091.2012.05.024.

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