Abstract
Microsporogenesis and development of the male gametophyte of Allium senescens L. were studied by use of paraffin sections. The anther was found to be four-sporangia. Its wall includes four layers: epidermis, endothecium, middle layer, and secretory tapetum. Cytokinesis during meiosis of microspore mother cells (MMCs) is successive. Most mature pollen grains are two-celled, a few are three-celled. In addition, anomalies were observed during meiosis of MMC and in uninucleate microspores, including laggard chromosomes, lagging chromosomes, anaphase bridges, and micronucleus. These anomalies are possible reasons for abortive pollen.
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This work is supported by the National Natural Science Foundation of China (grant no. 30470106) and the Beijing Natural Science Foundation of China (grant no. 8102012).
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Zhang, J., Liu, XR., Zhang, FX. et al. Microsporogenesis and development of the male gametophyte in Allium senescens L. (Liliaceae) in China. Plant Syst Evol 298, 1619–1624 (2012). https://doi.org/10.1007/s00606-012-0663-z
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DOI: https://doi.org/10.1007/s00606-012-0663-z