The role of seed appendage in improving the adaptation of a species in definite seasons: a case study of Atriplex centralasiatica

doi:10.1186/s12870-019-2090-6

	The role of seed appendage in improving the adaptation of a species in definite seasons: a case study of Atriplex centralasiatica
	Wang, Zhaoren 1,4; Zhao, Yufei ; Zhang, Yuanyuan 3; Zhao, Baoshan ; Yang, Zhen'an ; Dong, Lijia
	2019
发表期刊	BMC PLANT BIOLOGY
ISSN	1471-2229
卷号	19 期号:1
摘要	Background: As a common accompanying dispersal structure, specialized seed appendages play a critical role in the successful germination and dispersal of many plants, and are regarded as an adaptation character for plants survival in diverse environments. However, little is known about how the appendages modulate the linkage between germination and environmental factors. Here, we tested the responses of germination to seasonal environmental signals (temperature and humidity) via seed appendages using Atriplex centralasiatica, which is widely distributed in salt marshlands with dry-cold winter in northern China. Three types of heteromorphic diaspores that differ in morphology of persistent bracteole and dormancy levels are produced in an individual plant of A. centralasiatica. Results: Except for the nondormant diaspore (type A, with a brown seed enclosed in a persistent bracteole), bracteoles regulated inner seed dormancy of the other two dormant diaspore types, i.e., type B (flat diaspore with a black inner seed) and type C (globular diaspore with a black inner seed). For types B and C, germination of bracteole-free seeds was higher than that of intact diaspores, and was limited severely when incubated in the bracteole-soaking solution. Dormancy was released at a low temperature (< 10 degrees C) and suitable humidity (5-15%) condition. Oppositely, high temperature and unfit humidity induced secondary dormancy via inhibitors released by bracteoles. Type C with deeper dormancy needed more stringent conditions for dormancy release and was easier for dormancy inducement than type B. The germination windows were broadened and the time needed for dormancy release decreased after the bracteole flushing for the two dormant types in the field condition. Conclusions: Bracteoles determine the germination adaptation by bridging seeds and environmental signals and promising seedlings establishment only in proper seasons, which may also restrict species geographical distribution and shift species distributing ranges under the global climate change scenarios.
关键词	Atriplex centralasiatica Germination Heteromorphism Local adaptation Seed appendages Temperature and humidity
学科领域	Plant Sciences
DOI	10.1186/s12870-019-2090-6
收录类别	SCI
语种	英语
WOS关键词	GERMINATION BEHAVIOR ; DORMANCY ; ARABIDOPSIS ; DISPERSAL ; LIGHT ; SOIL ; BRACTEOLES ; HISTORY ; DIVERSIFICATION ; TEMPERATURE
WOS研究方向	Plant Sciences
WOS记录号	WOS:000505232500001
出版者	BMC
文献子类	Article
出版地	LONDON
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31700476]
作者邮箱	yza2765@126.com ; Donglijia@126.com
作品OA属性	gold, Green Published
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/19820
专题	植被与环境变化国家重点实验室
作者单位	1.Shaoxing Univ, Sch Life Sci, Shaoxing, Zhejiang, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 3.China West Normal Univ, Coll Life Sci, Nanchong, Sichuan, Peoples R China 4.Shanxi Normal Univ, Coll Life Sci, Linfen, Shanxi, Peoples R China 5.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zhaoren,Zhao, Yufei,Zhang, Yuanyuan,et al. The role of seed appendage in improving the adaptation of a species in definite seasons: a case study of Atriplex centralasiatica[J]. BMC PLANT BIOLOGY,2019,19(1).
APA	Wang, Zhaoren,Zhao, Yufei,Zhang, Yuanyuan,Zhao, Baoshan,Yang, Zhen'an,&Dong, Lijia.(2019).The role of seed appendage in improving the adaptation of a species in definite seasons: a case study of Atriplex centralasiatica.BMC PLANT BIOLOGY,19(1).
MLA	Wang, Zhaoren,et al."The role of seed appendage in improving the adaptation of a species in definite seasons: a case study of Atriplex centralasiatica".BMC PLANT BIOLOGY 19.1(2019).

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