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通过石蜡切片,在光学显微镜下系统观察了大黍有性生殖过程中大小孢子发生、雌雄配子体发育及其淀粉动态.大黍花药壁由表皮、药室内壁、中层和绒毡层4层细胞组成.在花药发育过程中,表皮细胞始终积累大、小不等的圆球状内含物,该内含物经PAS、苏木精分别染色均呈负反应.表皮细胞外壁在花粉成熟时期略有增厚,且具小刺状突起.绒毡层细胞属腺质型.小孢子母细胞在减数分裂过程中胞质分裂属连续型.成熟花粉粒富含较大颗粒的淀粉.大孢子母细胞减数分裂形成线型四分体,合点端大孢子发育为单核胚囊.4核胚囊进一步发育为4游离核与4细胞共存的8核胚囊.成熟胚囊属蓼型.在胚囊发育过程中,合点珠心细胞中淀粉不明显,在胚囊中合点端淀粉亦少于珠孔端,由此认为碳水化合物进入胚囊的主要通道是珠孔区珠心细胞和胚囊表面“,”Optical studies were made on mega and microsporogenesis,the development of female and male gametophyte and starch dynamics in Panicum maximum through conventional paraffin section.The anther wall consists of epidermis, endothecium, middle layer and tapetum.The globular contents in different size, which have PAS and hematoxylin negative reaction respectively, exist in the epidermal cells during the development of the anther.The outer wall of epidermal cells with spininess becomes slightly thick at mature p...