金银忍冬(Lonicera maackii(Rupr.)Maxim)胚和胚乳的发育
Journal of Inner Mongolia Agricultural University(Natural Science Edition)(2009)
Abstract
采用常规石蜡制片技术,对金银忍冬胚和胚乳的发育过程进行了研究。结果表明,金银忍冬胚胎发生类型为柳叶菜型。其卵细胞受精后,合子经过了约2个月的休眠期,于7月中下旬进行第1次分裂。第1次分裂为横向分裂,其顶细胞纵裂,随后经球形胚、心形胚、鱼雷形胚,至果实成熟时发育为成熟胚。基细胞横分裂1次,形成胚柄,胚柄发育缓慢,至球形胚时期,胚柄完全退化。合子分裂发生在初生胚乳核多次分裂之后。胚乳发育属核型,当发育至8细胞原胚时,游离胚乳核周围逐渐形成自己的细胞壁。成熟胚乳细胞富含油脂类物质。
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Key words
development,endosperm,embryo,Lonicera maackii(Rupr.) maxim
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