干旱区生态环境知识资源中心(Arid): 古尔班通古特沙漠及周缘52种植物种子的萌发特性与生态意义

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	古尔班通古特沙漠及周缘52种植物种子的萌发特性与生态意义
其他题名	A comparative study of seed germination traits of 52 species from Gurbantunggut Desert and its peripheral zone
	刘会良; 宋明方; 段士民; 王习勇; 张道远; 尹林克
来源期刊	生态学报
ISSN	1000-0933
出版年	2011
卷号	31 期号:15 页码:4308-4317
中文摘要	对古尔班通古特沙漠及其周缘52种植物种子的萌发特性进行比较,以探讨该地区植物的不同萌发对策及其生态适应意义。结果发现:萌发率80%以上的有11种,小于20%的有22种,7种未萌发;萌发开始时间为1 3d的有37种,大于10d的有2种;萌发持续时间为1 7d的有10种,大于22d的有14种;达50%萌发率的时间为1 7d的有17种。主成分分析(PCA)和聚类分析结果表明,52种植物可划分为4种萌发类型:爆发型、过渡型、缓萌型和低萌型,这可能与生境土壤中水分存在差异有关;木本植物的萌发率显著高于非木本植物,暗示木本植物的高萌发率保证植物能够快速占领空间和资源,增加竞争优势,而非木本植物,尤其是1年生植物表现低的萌发率,是植物生存的一种风险分摊策略。
英文摘要	In order to determine seed germination traits and its ecological significance of species,seed germination characteristics(germination percentages,day when germination began,germination periods and time required for half the final germination to be reached(d))of 52 species from the Gurbantunggut Desert and its peripheral zone were studied.Seeds of 52 species were collected at the time of seed dispersal from wild populations at Gurbantunggut Desert in northwest China during 2007.Seeds of each species were harvested from more than 20 individuals chosen at random.The seeds were allowed to dry naturally.The seed lot were stored dry in paper bags(about 23 ℃;RH:20%-40%)until the experiment began.For each species,four replicates of 50 seeds were placed on two layers of moist filter paper in 9 cm diameter Petri dishes and then placed in temperature-and light-controlled incubators.Seeds of each species were incubated alternating temperature regime of at 25 ℃ in light for 12 h and 10 ℃ in dark for 12 h.This temperature regime corresponds to the mean high and mean low temperatures,respectively,at the study site during the spring germination period.Light was provided by cool-white fluorescent bulbs(photosynthetic photon flux density of 30 mumol m-2 s-1)in 12 h intervals coinciding with the higher temperature period.Seed germination was monitored every 24 h for 30 days,and a seed was considered as germinated if the radicle was visible;germinated seeds were counted and then removed.Un-germinated seed were tested for viability before initiation of experiments as follows:seed viability was checked by cutting the seeds and dipping into 0.5% triphenyltetrazolium chloride(TTC)for 1 h.Pink embryos were considered to be viable.Results showed that germination percentages of 52 species displayed a bimodal distribution,and the germination percentage of most species was exceeding 80% and less than 20%;Day when germination began displayed a skewed toward short periods,37 species began to germinate within 1-3 days after the test began,while 2 species failed to germinate in a period of more than 10 days;Germination period showed different,for 10 species,their germination period was less than 10 days,while 14 species had a germination period of more than 22 days;For 17 species,the days required for half the final germination rate to be reached were 1-7d.Principal component analysis(PCA)and clustering analysis were used,and divided 52 species into four main germination patters:rapid,transition,slow and low,and low.Germination percentage of woody plants was significantly higher than that of non-woody plants,suggested that the high germination percentage of woody plants ensured them rapidly occupying space and resources to increase competitive advantage;non-woody plants,especially annuals plants,had relatively low germination percent,which was risk contribution strategy for plant survival.
中文关键词	古尔班通古特沙漠 ; 种子萌发 ; 生活型 ; 萌发类型
英文关键词	Gurbantunggut Desert seed germination life form germination type
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:4271303
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226953
作者单位	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	刘会良,宋明方,段士民,等. 古尔班通古特沙漠及周缘52种植物种子的萌发特性与生态意义[J]. 中国科学院新疆生态与地理研究所,2011,31(15):4308-4317.
APA	刘会良,宋明方,段士民,王习勇,张道远,&尹林克.(2011).古尔班通古特沙漠及周缘52种植物种子的萌发特性与生态意义.生态学报,31(15),4308-4317.
MLA	刘会良,et al."古尔班通古特沙漠及周缘52种植物种子的萌发特性与生态意义".生态学报 31.15(2011):4308-4317.