摘要
以美洲南瓜(Cucurbita pepoL.)种子有壳品种‘金辉2号’和无壳(裸仁)品系‘0516-2’为材料,用石蜡切片的方法比较其种皮的发育情况。结果表明:有壳品种和无壳品系在授粉后10d,种皮都明显分化出5层组织。在授粉后15d开始出现差别:有壳品种下皮层层数增加,厚壁组织和薄壁组织细胞壁加厚,颜色加深,随着种子的成熟,形成坚硬的外壳;而无壳品系在生长过程中下皮层、厚壁组织层和薄壁组织层增加不明显,发育后期各层组织表现出退化的趋势,最后变成一层薄的种皮。
Pumpkin normal strain＇Jinhui 2＇（Cucurbita pepo L.）and hull-less mutant strain＇0516-2＇ were used to determine the difference of the testa development using paraffin section method.The results showed that both normal and hull-less mutant seeds developed a five-zoned testa after 10 days post-pollination.The development course of testa was different between normal and hull-less mutant seeds after 15 days post-pollination.The cell layers of hypodermal were increased in normal strain and the color of that stained.The cell walls of sclerenchyma and parenchyma tissue were thickened,strained.When the seeds were maturity,these tissues became hard and leathery hull.On the contrary,the cell walls of sclerenchyma and parenchyma tissue were not thickened in hull-less mutant strain,the cell of tissue were collapsed and formed a thin testa.
出处
《园艺学报》
CAS
CSCD
北大核心
2011年第8期1547-1552,共6页
Acta Horticulturae Sinica
基金
黑龙江省科技攻关项目(GB06B111-6)
东北农业大学创新团队项目(CXT002-3-3)
关键词
南瓜
种皮
发育
解剖结构
pumpkin
testa
development
anatomical structure
