干旱区生态环境知识资源中心(Arid): 不同温度、水热条件对3种植物种子物理休眠解除的影响

Arid

	不同温度、水热条件对3种植物种子物理休眠解除的影响
其他题名	Effects of Different Temperature and Water-heat Conditions on the Physical Dormancy Release of Three Desert Legume Species
	布海丽且姆·阿卜杜热合曼 1; 刘会良 2; 张道远 2; 管开云 2
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2016
卷号	33 期号:3 页码:525-533
中文摘要	研究种子物理休眠解除机制及其影响因素是了解种子休眠生态学和种群适应策略的重要途径。准噶尔无叶豆(Eremosparton songoricum) 、银沙槐(Ammodendron bifolium)和乌拉尔甘草(Glycyrrhiza uralensis)是在干旱区分布的3种豆科珍稀物种,其种子均存在物理休眠现象。以3种植物种子为研究对象,探讨冷层积(5 ℃) 、夏季高温及干/湿处理对种子物理休眠解除的作用。研究表明: ① 3种植物种子的硬实率高,种皮透水性低,划破种皮的处理方法可有效解除3种植物种子的物理休眠。②冷层积对3种植物种子的物理休眠解除无显著影响。③高温、干/湿条件和处理时间显著影响3种植物种子的萌发率,其中,湿热条件更能有效解除3种植物种子的物理休眠。准噶尔无叶豆和银沙槐种子的物理休眠解除率与温度呈正相关,在80 ℃和65 ℃湿热条件下其萌发率最高,分别达到(70.48 2.92) %和(78.13 3.67) %,而乌拉尔甘草种子的物理休眠解除率与温度呈负相关, 40 ℃湿热条件下的萌发率最高,达到(85.23 3.82) %。表明荒漠地区夏季的极端高温有利于种子物理休眠的解除,但较少的降水量却限制了种子的萌发,这可能是导致该地区3种植物自然种群实生苗稀少,有性更新弱的主要原因之一。
英文摘要	Seed dormancy in the populations of Eremosparton songoricum,Ammodendron bifolium and Glycyrrhiza uralensis from the Gurbantunggut Desert and Tucker Guillermo Chonghuer Desert,Xinjiang was investigated through laboratory experiments with a view to understand the dormancy release mechanisms and population adaptation strategies. The treatments were the manual scarification,cold stratification (5 ℃), dry-hot and wet-hot treatments at simulated high temperature field conditions. The results showed that the three species had hard seed coat,there was no significant effect of cold stratification on dormancy release of these seeds. However,manual scarification broke effectively the seed physical dormancy. Dry-hot and wet-hot treatments and the treatment duration affected significantly the dormancy breaking of the three species,but treatment interactions were not important for E. songoricum and A. bifolium. There was a positive correlation between the dormancy release percentage and the temperature for E. songoricum and A. bifolium seeds,but a negative one for G. uralensis seeds. The dormancy release percentages of E. songoricum and A. bifolium seeds were the highest at 80 ℃ and 65 ℃,reaching (70.48 2.92) % and (78.13 3.67) % respectively. While the dormancy release percentage of G. uralensis seeds was decreased with the increase of temperature,and the highest germination percentage reached (85.23 3.82) % at 40 ℃. The wet-hot treatment was the most effective for dormancy release of the three species. Results suggested that the extremely high temperature in summer is effective to release seeds from dormancy,however rare precipitation is the main inhibitor of seed germination,and may cause the low seedling rate and survival rate of the three endangered species.
中文关键词	荒漠植物 ; 种子 ; 温度 ; 干/湿条件 ; 物理休眠
英文关键词	desert plant seeds temperatures dry /wet conditions physical dormancy
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5717303
来源机构	中国科学院新疆生态与地理研究所 ; 新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234304
作者单位	1.新疆大学科学技术学院(阿克苏校区), 中国科学院干旱区生物地理与生物资源重点实验室, 阿克苏, 新疆 843000, 中国; 2.中国科学院新疆生态与地理研究所, 中国科学院干旱区生物地理与生物资源重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	布海丽且姆·阿卜杜热合曼,刘会良,张道远,等. 不同温度、水热条件对3种植物种子物理休眠解除的影响[J]. 中国科学院新疆生态与地理研究所, 新疆大学,2016,33(3):525-533.
APA	布海丽且姆·阿卜杜热合曼,刘会良,张道远,&管开云.(2016).不同温度、水热条件对3种植物种子物理休眠解除的影响.干旱区研究,33(3),525-533.
MLA	布海丽且姆·阿卜杜热合曼,et al."不同温度、水热条件对3种植物种子物理休眠解除的影响".干旱区研究 33.3(2016):525-533.