Effects of soil type, period of burial and moisture levels on the germination of Oncocyclus iris seeds

doi:10.1007/s11258-019-00971-8

CORC > 昆明植物研究所 > 中国科学院昆明植物研究所 > 中国科学院东亚植物多样性与生物地理学重点实验室

	Effects of soil type, period of burial and moisture levels on the germination of Oncocyclus iris seeds
	Volis, Sergei 1; Dorman, Michael 2
刊名	PLANT ECOLOGY
	2019-11-01
卷号	220 期号:11 页码:1021-1028
关键词	Seed dormancy Sequential germination Iris Oncocyclus
ISSN号	1385-0237
DOI	10.1007/s11258-019-00971-8
通讯作者	Volis, Sergei(svolis@gmail.com)
英文摘要	Understanding germination of seeds constituting a persistent soil seed bank is important because the ability to predict longevity of a seed in soil and a particular combination of environmental conditions supporting dormancy break and germination can be critical for restoration of threatened species having poor regeneration. We studied the pattern of germination under experimentally manipulated environmental conditions in several threatened iris species of section Oncocyclus. In the first experiment, spanning 11 years, we manipulated soil type and precipitation regime, and in the second experiment, spanning 7 years, we tested an effect of cumulative amount of rainfall during a season on germination. In all studied species the germination process was intermittent, with distinct germination pulses separated by years with no or very low germination. High innate dormancy appears to be a general property of newly produced seeds of Oncocyclus irises, but there are exceptions. Although in three tested Oncocyclus species considerable (above 25%) germination fraction was observed only in the second and subsequent seasons regardless of the soil moisture experienced by a seed, in Iris atropurpurea it occurred in the first season under watering equivalent or exceeding cumulative seasonal precipitation of 100 mm. In the three other species, although high cumulative germination percentage was observed by year four under all experimental conditions a substantial fraction of seeds was still ungerminated and viable. Our results have important conservation implications. We recommend for mass seed germination creation of a soil seed bank under natural conditions with minimal modifications, monitored for more than two years. Supplementary watering (if feasible) will speed up the germination process and shading will have a similar effect but neither of these two is a requirement.
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
语种	英语
WOS记录号	WOS:000493679000002
内容类型	期刊论文
源URL	[http://ir.kib.ac.cn/handle/151853/70935]
专题	昆明植物研究所_中国科学院东亚植物多样性与生物地理学重点实验室
通讯作者	Volis, Sergei
作者单位	1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming 650204, Yunnan, Peoples R China 2.Ben Gurion Univ Negev, Geog Dept, IL-84105 Beer Sheva, Israel
推荐引用方式 GB/T 7714	Volis, Sergei,Dorman, Michael. Effects of soil type, period of burial and moisture levels on the germination of Oncocyclus iris seeds[J]. PLANT ECOLOGY,2019,220(11):1021-1028.
APA	Volis, Sergei,&Dorman, Michael.(2019).Effects of soil type, period of burial and moisture levels on the germination of Oncocyclus iris seeds.PLANT ECOLOGY,220(11),1021-1028.
MLA	Volis, Sergei,et al."Effects of soil type, period of burial and moisture levels on the germination of Oncocyclus iris seeds".PLANT ECOLOGY 220.11(2019):1021-1028.