中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 种子萌发和幼苗生长对沙丘环境的适应机制 应用生态学报 2006,17 (1) 137-142
Position: Home > Articles > Adaptation strategies of seed germination and seedling growth to sand dune environment. Chinese Journal of Applied Ecology 2006,17 (1) 137-142

种子萌发和幼苗生长对沙丘环境的适应机制

作  者：
朱雅娟;董鸣;黄振英
单  位：
中国科学院植物研究所植被数量生态学重点实验室
关键词：
沙丘;沙埋;沙蚀;种子萌发;种子休眠;幼苗生长
摘  要：
综述了植物沙生适应机制的研究及其进展.一些植物的种子在刚成熟时具有休眠特性.种子需要适度沙埋促进萌发并实现幼苗定居,但过度沙埋则会抑制种子萌发和出苗.在沙层深处,没有萌发的种子会进入休眠状态,形成土壤种子库.幼苗通过增加节数和延长节间来适应沙埋.沙埋深度超过植物的忍耐限度会抑制幼苗生长,甚至导致幼苗死亡.沙生植物必须适应其他环境因子,如盐风与土壤盐分、昆虫采食、土壤养分亏缺等,才能在沙丘上成功生长.沙蚀可导致幼苗根系暴露并干燥脱水.一些沙漠植物的幼苗在萌发后可忍耐一段时期的干燥,水分条件得到满足之后,幼苗能够恢复生长.
译  名：
Adaptation strategies of seed germination and seedling growth to sand dune environment.
作  者：
ZHU Yajuan~(1,2),DONG Ming~1,HUANG Zhenying~1 (()~1Key Laboratory of Quantitative Vegetation Ecology,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China;()~2Graduate School of Chinese Academy of Sciences,Beijing 100039,China).
关键词：
Sand dune,Sand accretion,Sand erosion,Seed germination,Seed dormancy,Seedling growth.
摘  要：
Sand dune plants possess many adaptation strategies to withstand sand environment,e.g.,some desert plant seeds are dormant when matured,which helps them to escape from unfeasible environment conditions and be preserved as seed bank.The seed germination and seedling establishment of psammophytes need moderate sand burial,while excessive burial will inhibit seed germination and seedling emergence.Seeds without germination in deeper sand are in enforced dormancy,and form soil seed bank.Sand dune plant seedlings could tolerant finite sand burial by increasing the number of nodes per culm and elongating internodes.When the seedlings are partially buried,they could survive through the maintenance of photosynthesis organism.Once sand burial exceed the threshold of the plant,seedlings growth will be restrained and the growth ability even permanently lost.Other factors such as salt spray,insect herbivory,and lack of soil nutrients also affect seed germination and seedling establishment.The precipitation in desert and sand land is unpredictable and irregular.Sand erosion leads roots be exposed to the air and dehydrated to die.However,seedlings of some desert plant have the ability to tolerate desiccation for a period of time after germination.Once there is rain,the seedlings will rivive.

相似文章

导出引用
计量
文章访问数: 11
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46