| 摘要: |
| 研究了冬小麦叶片的分化、生长、形态与结构。小麦胚叶数在不同品种及生育条件之间均为3-4个,但3或4胚叶籽粒的比例却有明显差异,主要决定于籽粒建成过程的持续时间及其相应的生育条件。成熟籽粒的胚叶均处在建成过程中,尚未最后建成,其中第4胚叶处于奠基期。建成叶片的长、宽主要决定于轴向细胞数和横向细胞数及叶脉数,与细胞大小无关;厚度决定于叶肉细胞高度,脉间叶肉细胞均为四层。确定了小麦主茎叶片分组(胚叶、近根叶、茎生叶)的形态、组织结构标准。 |
| 关键词: 叶片厚度 下表皮 小麦叶片 叶肉细胞 叶脉 分化程度 籽粒建成 细胞数 形态与结构 不同品种 |
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| Abstract: |
| The present paper reports the differentiation and development of wheat leafprimordial and the morphology and size of its primordial and mature Ieaves.Generally there are 3 or 4 primordial in each wh- eat seed of any cultivars,under different cultural conditions.But the ratios of seeds with 3 or 4 leaf primordial are distinct variation mai- nly based on seed formation duration and their ecological conditions when they are growing,The primordium of the forth primordial leaf forms during the process of the see... |
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