J Integr Plant Biol. ›› 2002, Vol. 44 ›› Issue (3): 259-263.
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MA San Me, YE Xiu Lin*, ZHAO Nan Xian, LIANG Cheng Ye
Abstract:
A cytological study on Apluda mutica L. revealed that this species was a facultative apomict with 60.74% of apomictic embryo sac formation. Its sexual reproduction exhibited the characteristics of polygonum type embryo sac formation. After the 3 megaspores at the micropylar end had degenerated, leaving only the chalazal megaspore in the nucellus, a nucellar cell adjacent to the megaspore differentiated into an aposporous initial, which later developed into a panicum type embryo sac. It was an aposporous 4 nucleate embryo sac without chromosome reduction and composed of an egg, a single synergid and a central cell with 2 polar nuclei. The chalazal megaspore degenerated before the onset of the division in the aposporous initial cell.
水蔗草兼性无融合生殖胚胎学研究
马三梅1,2 叶秀粦1* 赵南先1 梁承邺1
(1.中国科学院华南植物研究所,广州,510650;2.烟台师范学院生物学,烟台,264025)
摘要:对水蔗草(Apluda mutica L.)的生殖方式进行研究,结果表明水蔗草进行兼性无融合生殖.胚囊发育分为两种类型,即有性生殖的蓼型和无孢子生殖的大黍型.无融合生殖胚囊频率为60.74%.在大孢子母细胞发育至四分体后,珠孔端的3个大孢子解体.合点端的大孢子未解体时,邻近大孢子的1个珠心细胞开始特化,形成无融合生殖的原始细胞,由该原始细胞发育形成有1个卵细胞、1个助细胞和2个极核的四核胚囊.
关键词 水蔗草 兼性无融合生殖 胚胎学 无孢子生殖
*通讯作者
MA San Me, YE Xiu Lin, ZHAO Nan Xian, LIANG Cheng Ye. Embryological Studies on Facultative Apomixis in Apluda mutica (Gramineae)[J]. J Integr Plant Biol., 2002, 44(3): 259-263.
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https://www.jipb.net/EN/Y2002/V44/I3/259