ULTRASTRUCTURAL EXPRESSION OF CYTOPLASMIC MALE-STERILITY IN SUGAR-BEET (BETA-VULGARIS L)
ULTRASTRUCTURAL EXPRESSION OF CYTOPLASMIC MALE-STERILITY IN SUGAR-BEET (BETA-VULGARIS L)
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DOI：
10.1007/bf00227579
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发表时间：
1993-03-01
影响因子：
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通讯作者：
JASSEN, B
中科院分区：
文献类型：
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作者：
MAJEWSKASAWKA, A;RODRIGUEZGARCIA, MI;JASSEN, B
对甜菜雄性可育和雄性不育花药中小孢子母细胞和绒毡层的发育进行了研究。在电子显微镜水平上进行了比较。这些研究的补充，通过小孢子发生的连续阶段的线粒体在两种组织中的形态测定分析。雄性不育花药超微结构最早期的不规则性出现在四分体时期的绒毡层中。这些干扰最初表现为线粒体大小略有减少，内质网出现同心圆结构。随着发育的进行，线粒体大小的进一步减少变得更加明显，并伴随着核糖体数量的减少和绒毡层产生乌氏体的失败。这种不能产生乌氏体的现象反映在不育小孢子外壁发育不全上。
The development of microspore mother cells (MMC) and tapetum in male-fertile and male-sterile anthers of Beta vulgaris L. was compared at the electron microscope level. These studies were complemented by morphometric analyses of mitochondria in both tissues through successive stages of microsporogenesis. The earliest irregularities in the ultrastructure of male-sterile anthers were noted within the tapetum at the tetrad stage. These disturbances were initially expressed by a slight reduction in mitochondrial size and the appearance of concentric configurations of endoplasmic reticulum. As development proceeded, a further decrease in mitochondrial size become more conspicuous and was accompanied by a reduction in ribosome population and a failure of the tapetum to produce Ubisch bodies. This failure to produce Ubisch bodies is reflected in the underdevelopment of sterile microspore exine.