| 摘要: |
| 本文应用石蜡切片术、冰冻切片术及扫描电镜对棉花四个栽培种的纤维发育进行比较研究。结果指出:棉花胚珠表皮细胞分化、突起时,具有明显的形态学变化,核增大、核仁聚集、增大、液泡形成,核向外移动,其中核和核仁的形态变化可做为纤维分化、形成的形态学指标。胚珠表皮细胞的突起具有阶段性特征,在第一次突起和第二次突起间有数天的停顿。对纤维伸长的测定表明,各棉种都呈S形,表现为慢—快—慢的趋势。次生壁增厚主要在开花后30天速度增快。对纤维横切面用扫描电镜观察可清楚看到大小不等的空洞。 |
| 关键词: 开花后天数 纤维发育 纤维伸长 陆地棉 海岛棉 形态学变化 比较研究 纤维分化 扫描电镜观察 次生壁增厚 |
| DOI： |
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| 基金项目:本试验为国家自然科学基金资助课题 |
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| THE COMPARATIVE STUDIES ON FIBER DEVELOPMENT OF FOUR CULTISPECIES IN COTTON |
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| Abstract: |
| The present paper was conducted by applying paraffin and refrige- rated sectioning techniques as well as SEM.The results showed that the differentiation and enation of epidermal cells on the outer integu- ment of cotton ovule have some distinct morphological changes as nucle- us enlargement,nucleolus accumulation and increment,vacuole formation and nucleus transfering outwardly etc.Among these morphological cha- nges,the nucleus and nucleolus may be as the morphological indices of differentiation and enatio... |
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