|
|||||
|
|
| 三种水库消落带草本植物对完全水淹的适应机制研究 | |
| 引用本文： | 李秋华,刘送平,支崇远,李小峰,陈峰峰,曾庆凯.三种水库消落带草本植物对完全水淹的适应机制研究[J].热带亚热带植物学报,2013,21(5):459-465. |
| 作者姓名： | 李秋华 刘送平 支崇远 李小峰 陈峰峰 曾庆凯 |
| 作者单位： | 1. 贵州师范大学贵州省山地环境信息系统和生态环境保护重点实验室,贵阳,550001 2. 贵州师范大学贵州省山地环境信息系统和生态环境保护重点实验室，贵阳550001; 贵州师范大学生命科学学院，贵阳550001 3. 贵州师范大学生命科学学院,贵阳,550001 |
| 基金项目： | 贵阳市重大科技专项([2010]5-03); 贵州省科技计划项目(黔科合区域合[2013]7005 号); 贵阳市科技计划项目(筑科合同[2012]5 号) 资助 |
| 摘 要： | 为了解虉草(Phalaris arundinacea)、牛鞭草(Hemarthria altissima)和狗牙根(Cynodon dactylon)3种水库消落带草本植物在完全水淹条件下的生理生态适应机制，对这3种植物的生态指标(枝条、叶和生物量)和生理指标(可溶性糖、淀粉和根系活力)的动态变化特征进行了研究。结果表明：在完全水淹条件下，虉草、牛鞭草和狗牙根都不产生新的枝条，它们通过减少总叶数、总叶长和生物量的方式来适应水淹环境。虉草和狗牙根通过减缓枝条生长速率来适应水淹环境，而牛鞭草则是通过先加快生长后抑制生长来保存活力。虉草、牛鞭草和狗牙根均以少量的碳水化合物(可溶性糖和淀粉)消耗，降低根系活力等方式来适应长期的水淹环境。3种草本植物的水淹耐受能力由大到小依次为狗牙根、虉草、牛鞭草。 |
| 关 键 词： | 水库消落带 虉草 牛鞭草 狗牙根 完全水淹 适应 |
| 收稿时间： | 2012/12/25 0:00:00 |
| 修稿时间： | 2013/3/14 0:00:00 |
Adaptation Mechanism of Three Herbs in the Water-level-fluctuation-zone of Reservoir to Complete Submergence |
|
| LI Qiu-hu,LIU Song-ping,ZHI Chong-yuan,LI Xiao-feng,CHEN Feng-feng and ZENG Qing-kai.Adaptation Mechanism of Three Herbs in the Water-level-fluctuation-zone of Reservoir to Complete Submergence[J].Journal of Tropical and Subtropical Botany,2013,21(5):459-465. | |
| Authors: | LI Qiu-hu LIU Song-ping ZHI Chong-yuan LI Xiao-feng CHEN Feng-feng and ZENG Qing-kai |
| Institution: | 1. Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, China;1. Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, China;2. School of Life Science, Guizhou Normal University, China;School of Life Science, Guizhou Normal University, China;1. Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, China;1. Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, China;School of Life Science, Guizhou Normal University, China |
| Abstract: | In order to understand the adaptive mechanism of three plant species, including Phalaris arundinacea, Hemarthria altissima and Cynodon dactylon, in the water-level-fluctuation-zone (WLFZ), dynamic changes in ecological and physiological indicators, such as branch, leaf, biomass, soluble sugar, starch and root vigor, were studied. The results showed that P. arundinacea, H. altissima and C. dactylon did not generate new branch, and reduced total leaf number, total leaves length and biomass for adapt to submergence environment. P. arundinacea and C. dactylon adapted to complete submergence by slow growth, while H. altissima accelerated growth at first and then inhibited growth to preserve vitality. P. arundinacea, H. altissima and C. dactylon consumed little carbohydrate, reduced root vigor to adapt complete submergence. The tolerance of prolonged submergence of the three herbs is as the following: C. dactylon > P. arundinacea > H. altissima. |
| Keywords: | Reservoir water-level-fluctuation-zone Phalaris arundinacea Hemarthria altissima Cynodon dactylon Complete submergence Adaptation |
| 本文献已被 万方数据 等数据库收录！ | |
| 点击此处可从《热带亚热带植物学报》浏览原始摘要信息 | |
| 点击此处可从《热带亚热带植物学报》下载免费的PDF全文 | |