Just before the first mitosis of microspore, cytoplasm arise from one side of the nucleus facing the aperture and form a cytoplasmic strand which connects with the cytoplasm of external end of pollen through the large central vacuole.
小孢子第一次有丝分裂前夕,细胞质在核向萌发孔的一面集中并形成穿过中央大液泡的细胞质索。
After microspore divi-sion and the big vacuole decomposition, many calcium granules accumulated again on the mem-brane of the vacuoles ( Plate III-1, 2), displaying calcium regulates vacuole formation and decom-position during pollen development.
小孢子分裂后,大液泡消失过程中又伴随着许多钙颗粒附在小液泡膜上,显示出Ca2+与花粉中液泡的形成和分解有关。
Super-microspore happened in the 5 % ~30 % or more tetrads and its formation was directly concerned with B-chromosome.
四分体中额外小孢子的形成与B - 染色体直接有关,其频率为5%~30%或更高.
The microspore lacks a large central vacuole.
小孢子缺中央大液泡。
When the tapetum disintegrates gradually later, microspore mother cell has still not entered meiosis, finally disintegrated.
到后期绒毡层逐渐解体, 小孢子母细胞依然没有进入减数分裂, 最终解体.
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