干旱区生态环境知识资源中心(Arid): 喀什霸王的结实和种子萌发特性

Arid

	喀什霸王的结实和种子萌发特性
其他题名	Fruit set and seed germination traits of Zygophyllum kaschgaricum
	艾沙江·阿不都沙拉木 1; 迪丽娜尔·阿布拉 2; 张凯 2; 买热也木古·吐尔逊 2; 卡迪尔·阿布都热西提 1; 李玲 1
来源期刊	植物生态学报
ISSN	1005-264X
出版年	2019
卷号	43 期号:5 页码:437-446
中文摘要	喀什霸王(Zygophyllum kaschgaricum)是生长于中国新疆南部荒漠环境的稀有种及二级保护植物。当前,该物种在自然种群中呈分散式及片段化分布,且种群密度低,种群老龄化较严重。因此,为了了解该物种种子萌发特性及其对荒漠环境的响应,该文采用室内控制实验方法,对该物种的自然坐果率、结籽率、种子吸水特性、种子休眠和萌发特性及对干旱胁迫的响应进行了比较研究。结果表明:喀什霸王在自然种群中的坐果率及结籽率较低,且种子的败育率较高。不同干藏时间种子的吸水速率间存在显著差异;随着干藏时间的延长,种子的吸水率逐步增强。刚成熟的种子在不同温度及光周期下均可萌发;其中高温(10/20 ℃,20/30 ℃)及黑暗条件下的萌发率比低温(10/5 ℃,5/2 ℃)及光照条件下的萌发率高。不同干藏时间的种子在不同浓度赤霉素(GA3)下的萌发率均较高;但低温储藏时间对该物种种子的打破休眠及萌发率没有促进作用。以上结果说明该物种存在非深度生理休眠;而干藏时间、高温且黑暗及高浓度(50 mmol·L~(-1)) GA3是打破休眠及促进种子萌发的最合适条件。高温条件下的干旱胁迫对喀什霸王种子萌发具有抑制作用;春季和秋季降水量决定种子的萌发率。总之,喀什霸王种子在物候上表现出的春秋季萌动及非深度生理休眠以提高幼苗存活力及保障种群稳定性,是一种对新疆南部干旱及高温胁迫荒漠环境的适应策略。
英文摘要	Aims Zygophyllum kaschgaricum is a rare and secondary protection plant,which grows in the desert environment in southern Xinjiang,China.At present,this species not only distributes decentralized and fragmentally,but also is low population density and severe ageing of populations in the natural populations.To better understand how this species is adapted to its desert habitat,we studied seed set and its germination characteristics and addressed the following questions.1) What are the seed set characteristics and water absorption of seeds in different dry storage duration in natural population? 2) What are the seed dormancy and drought stress responses of this species in desert environment? Methods For the seed set and seed germination characters,we compared the natural seed set of each fruit and water absorption characteristics of each seed in the different dry storage duration,seed dormancy and germination and their responses to drought stress,and the adaptive strategies of this species in southern Xinjiang (Taklimakan desert) natural populations were analyzed.Important findings The natural fruit and seed set rate of this species is low and seed abortion rate is high in natural populations.There is significant difference in the water absorption capacity of seeds subjected to different durations of dry storage time (p <0.001),and water absorption capacity of seeds increases with the extension of dry storage time.The seed germination rate increased with the extension of dry storage time under different temperature conditions.The newly matured seeds germinate under different temperature conditions and light cycle(dark 12 h and light 12 h);The germination rate at high temperature (10/20 ℃,20/30 ℃) and dark conditions is higher than that at low temperature (10/5 ℃,5/2 ℃) and light conditions.Seed germination rate at different light and temperature conditions under different GA3 concentration was high,but storage period at low temperature does not promote breaking of dormancy and germination in Z.kaschgaricum seeds.The results suggest that the species has shallow physiological dormancy.Storage at dry environment,high temperature and dark mode conditions,and high concentration (50 mmol·L~(-1)) of GA3 were the most suitable factors to break dormancy and thus promote seed germination of Z.kaschgaricum.Drought stress under the high temperature inhibited seed germination.The rainfall during spring and autumn is the most important factor to control the seed germination rate.However,shallow physiological dormancy and seed germination at spring and autumn characteristics can improve for the seedling viability and population expansion of this Z.kaschgaricum in the desert,which may be an adaptive strategy to drought and high temperature stress of desert environment in Taklimakan (southern Xinjiang),China.
中文关键词	种子萌发 ; 干藏时间 ; 吸水特性 ; 非深度生理休眠 ; 暖温带荒漠环境
英文关键词	seed germination dry storage duration water absorption characteristics shallow physiological dormancy warm temperate desert environment
语种	中文
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6600869
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/316155
作者单位	1.喀什大学生命与地理科学学院;;喀什大学, ;;新疆维吾尔自治区叶尔羌绿洲生态与生物资源自治区高校重点实验室, 喀什;;喀什, 新疆;;新疆 844006;;844006, 中国; 2.喀什大学生命与地理科学学院, 喀什, 新疆 844006, 中国
推荐引用方式 GB/T 7714	艾沙江·阿不都沙拉木,迪丽娜尔·阿布拉,张凯,等. 喀什霸王的结实和种子萌发特性[J],2019,43(5):437-446.
APA	艾沙江·阿不都沙拉木,迪丽娜尔·阿布拉,张凯,买热也木古·吐尔逊,卡迪尔·阿布都热西提,&李玲.(2019).喀什霸王的结实和种子萌发特性.植物生态学报,43(5),437-446.
MLA	艾沙江·阿不都沙拉木,et al."喀什霸王的结实和种子萌发特性".植物生态学报 43.5(2019):437-446.