| 利用扫描电镜研究嵩草属牧草种子形态和解剖学特征 |
| |
| 引用本文： | 张国云,裴国亮,姬燕. 利用扫描电镜研究嵩草属牧草种子形态和解剖学特征[J]. 分析仪器, 2011, 0(1): 69-73 |
| |
| 作者姓名： | 张国云 裴国亮 姬燕 |
| |
| 作者单位： | 张国云,裴国亮,Zhang Guoyun,Pei Guoliang(西北农林科技大学大型仪器设备管理中心,杨凌,712100);姬燕,Ji Yan(西北农林科技大学附属中学,杨凌,712100) |
| |
| 基金项目： | 西藏科技厅科技攻关项目 |
| |
| 摘 要： | 为了探明嵩草属牧草种子的繁殖特性，提高嵩草属牧草种子的发芽率，利用扫描电镜，对7种采自西藏的嵩草种子的形态特征及其解剖特征进行了观察。用不同浓度的赤霉素、聚乙二醇、硫酸、氢氧化钠对嵩草种子做了化学处理，并对其种皮特征也进行了电镜观察。结合发芽试验，初步分析认为：嵩草属牧草种子在自然条件下萌发率极低，可能是由于嵩草属种子的综合性休眠。种子小、果皮坚硬致密、外覆光滑且厚的角质层是主要原因。坚硬致密的果皮虽有利于嵩草属种子抵御严寒和外力破坏，但同时也使胚和胚乳不易获得足够的水和氧气，并阻碍胚根和胚芽穿破保护组织，限制了种子的萌发。一定浓度的氢氧化钠处理种子能均匀去掉果皮角质层，甚至破坏果皮最外层大型厚壁细胞，增大细胞间隙，使中间纵向致密组织变得疏松，让水分和氧气易于进入种子，从而提高发芽率。
|
| 关 键 词： | 扫描电镜 嵩草属牧草 种子发芽率 |
Research on mophological and anatomical characteristics of Kobresia pasture seeds by SEM |
| |
| Zhang Guoyun,Pei Guoliang,Ji Yan. Research on mophological and anatomical characteristics of Kobresia pasture seeds by SEM[J]. Analytical Instrumentation, 2011, 0(1): 69-73 |
| |
| Authors: | Zhang Guoyun Pei Guoliang Ji Yan |
| |
| Affiliation: | Zhang Guoyun,Pei Guoliang,Ji Yan(1.Management Center for Large Equipment,Northwest Agricuture and Forestry University,Yangling,712100,2.Attached Middle School of Northwest Agriculture and Forestry University,712100) |
| |
| Abstract: | In order to investigate the reproductive characteristics of Kobresia pasture seeds and promote the germination rates,the morphological and anatomical characteristics of seven kinds of Kobresia pasture seeds from Tibet and the characteristics of seed capsules treated with gibberellin,PEG,sulfuric acid and sodium in different concentrations were observed by SEM.Combined with germination test,the preliminary results showed that the low germination rates of Kobresia seeds under natural conditions were due to th... |
| |
| Keywords: | |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
