干旱区生态环境知识资源中心(Arid): 干旱胁迫对窄叶鲜卑花种子萌发及幼苗生长的影响

Arid

	干旱胁迫对窄叶鲜卑花种子萌发及幼苗生长的影响
其他题名	Effects of Drought Stress on Seed Germination and Seedling Growth of Sibiraea Angustata
	陈叶; 闫芳; 马银山; 罗光宏
来源期刊	水土保持通报
ISSN	1000-288X
出版年	2018
卷号	38 期号:6 页码:29-34
中文摘要	[目的]研究干旱胁迫对窄叶鲜卑花种子萌发及幼苗生长的影响,为野生种驯化和种群恢复提供参考。[方法]以窄叶鲜卑花种子为实验材料,采用不同浓度聚乙二醇(PEG-6000)模拟干旱胁迫环境,研究干旱协迫强度对窄叶鲜卑花种子的吸胀速率、发芽率、发芽势、发芽指数、活力指数和种子抗旱萌发指数及幼苗生长情况的影响。[结果]随着干旱胁迫程度的加剧,窄叶鲜卑花种子的吸水过程表现出急速吸水期、缓慢上升期和吸水平稳期3个阶段:其发芽率、发芽势、发芽指数、活力指数和种子抗旱萌发指数及苗高、根长,苗重与胁迫强度均呈负相关;当PEG浓度达30%时,种子萌发完全被抑制。另一方面.种子群体萌动、萌发和出苗达50%所需时间随胁迫强度的增加而越发延迟,且各阶段对环境临界水势要求不同,出苗阶段最为严格,表明种子出苗过程对环境水分胁迫较为敏感,耐旱能力较弱。[结论]干旱胁迫显著抑制了窄叶鲜卑花种子的萌发和幼苗生长,也说明水分是窄叶鲜卑花种子萌发和幼苗形成的主导因素之一,在较干旱地区种植需要考虑水分的供给。
英文摘要	[Objective] The effects of drought stress on the seed germination and seedling growth of Sibiraea angustata was investigated in order to provide reference for wild species domestication and population recovery. [Methods] To study the swellingrate, germination percentage, germination potential, germination index, vigor index, seed drought germination index and seedling growth in Sibiraea angustata under different concentrations of polyethylene glycol(PEG-6000) treatments. [Results] With the intensification of the stress level, the absorption process of the seeds of narrow leaves Sibiraea angustata showed three stages: rapid water absorption period, slow rising period and water absorption period,and the germination rate, germination potential, germination index,vigor index and seed drought-resistance germination index, seedling height and root length, and the seedling weight were negatively correlated with the stress intensity. When the polyethylene glycol concentration reached 30%,the germination of seed was inhibited completely. On the other hand,seed germination and emergence, and 50% of the time delay were decreased with the increase of stress intensity. Among them,the most stringent stage is emergence stage,seed emergence process of environmental was more sensitive, and drought capability is weak. [Conclusion] Drought stress significantly inhibited the seed germination and seedling growth, it also suggested that water is one of the dominant factor for the formation of seed germination and seedling growth. Therefore, planting Sibiraea angustata in the arid areas requires consideration of water supply.
中文关键词	窄叶鲜卑花 ; 干旱胁迫 ; 种子萌发 ; 聚乙二醇
英文关键词	Sibiraea angustata drought stress seed germination polyethylene glycol
类型	Article
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:6407452
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238294
作者单位	陈叶, 河西学院农业与生物技术学院;;甘肃省河西走廊特色资源利用省级重点实验室, ;;甘肃省河西走廊特色资源利用省级重点实验室, 张掖;;张掖, 甘肃;;甘肃 734000;;734000, 中国.; 闫芳, 河西学院农业与生物技术学院;;甘肃省河西走廊特色资源利用省级重点实验室, ;;甘肃省河西走廊特色资源利用省级重点实验室, 张掖;;张掖, 甘肃;;甘肃 734000;;734000, 中国.; 马银山, 河西学院农业与生物技术学院;;甘肃省河西走廊特色资源利用省级重点实验室, ;;甘肃省河西走廊特色资源利用省级重点实验室, 张掖;;张掖, 甘肃;;甘肃 734000;;734000, 中国.; 罗光宏, 甘肃省河西走廊特色资源利用省级重点实验室;;甘肃省微藻开发中心, 甘肃省河西走廊特色资源利用省级重点实验室;;, 张掖;;张掖, 甘肃;;甘肃 734000;;734000, 中国.
推荐引用方式 GB/T 7714	陈叶,闫芳,马银山,等. 干旱胁迫对窄叶鲜卑花种子萌发及幼苗生长的影响[J],2018,38(6):29-34.
APA	陈叶,闫芳,马银山,&罗光宏.(2018).干旱胁迫对窄叶鲜卑花种子萌发及幼苗生长的影响.水土保持通报,38(6),29-34.
MLA	陈叶,et al."干旱胁迫对窄叶鲜卑花种子萌发及幼苗生长的影响".水土保持通报 38.6(2018):29-34.