| 先锋植物沙棘Ⅲ——生活史分析 |
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| 引用本文： | 林美珍,张吉科,张国伟,张小民.先锋植物沙棘Ⅲ——生活史分析[J].国际沙棘研究与开发,2006,4(4):1-7. |
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| 作者姓名： | 林美珍 张吉科 张国伟 张小民 |
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| 作者单位： | 1. 山西大学生命科学与技术学院,山西太原,030006
2. 大同市利群药业公司,山西大同,037000 |
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| 摘 要： | 就沙棘生态习性,应归属r-型生态对策型。沙棘的生活史具两型性(有性和无性繁殖),是对有限资源权衡利用与分配在生命维持-生长-繁殖-扩散上的不均衡结果,是长期自然选择,进化的结果。固氮与克隆生长有利与扩大了r-型生态对策。雌雄异株的进化,避免了近交衰退和提高了沙棘的适合度。沙棘的花序分化受多种同源异型基因调控,而性别决定则受Y性染色体上性基因连锁决定。沙棘繁殖力很高,但衰老较快,是一种生命期(20年左右)较短的灌木。
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| 关 键 词： | 沙棘 生活史 r-型生态对策 雌雄异株 性别决定 克隆植物 生命周期 |
| 文章编号： | 1672-4683（2006）04-0001-07 |
| 收稿时间： | 2006-06-07 |
| 修稿时间： | 2006年6月7日 |
The Pioneer Plant of Seabuckthorn Ⅲ——the Analysis of the Life History |
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| Authors: | Lin Meizhen Zhang Jike Zhang Guowei Zhang Xiaomin |
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| Institution: | 1. College of Life Sciences and Technology of Shanxi University, Taiyuan of Shanxi Province, 030006 ; 2 . Liqun Medical Company of Datong , Datong of Shanxi Province, 037000 |
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| Abstract: | Seabuckthorn belongs to the r-type ecological strategy plant according to its ecological habits.The life history of seabuckthorn is dual-type including sexual reproduction and asexual reproduction which is the unequal result of the utility and distribution of limit resources in the process of life maintance-growth-reproduction-diffusion as well as the result of natural choice and evolution in a long time.The nitrogen fixation and clone growth help and expand the r-type ecological strategy.The evolution of dioecism has avoided the decline of inbreeding and improved the suitability of seabuckthorn.The divide of seabuckthorn inflorescence is controlled by many homeotic selector genes while the sex dicision is dicided by the sexual gene chains of Y sex chromosome.Seabuckthorn is a kind of shrub which has high reproduction while it is easy to decline with a short twenty years of life cycle. |
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| Keywords: | seabuckthorn life history r-type ecological strategy dioecism sex dicision clone plant life cycle |
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