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

CORC > 植物研究所 > 中国科学院植物研究所 > 植被与环境变化国家重点实验室

	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 2; Zhao, Baoshan ; Yang, Zhen'an ; Dong, Lijia
刊名	BMC PLANT BIOLOGY
	2019
卷号	19 期号:1
关键词	Atriplex centralasiatica Germination Heteromorphism Local adaptation Seed appendages Temperature and humidity
ISSN号	1471-2229
DOI	10.1186/s12870-019-2090-6
文献子类	Article
英文摘要	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.
学科主题	Plant Sciences
出版地	LONDON
WOS关键词	GERMINATION BEHAVIOR ; DORMANCY ; ARABIDOPSIS ; DISPERSAL ; LIGHT ; SOIL ; BRACTEOLES ; HISTORY ; DIVERSIFICATION ; TEMPERATURE
WOS研究方向	Plant Sciences
语种	英语
出版者	BMC
WOS记录号	WOS:000505232500001
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31700476]
内容类型	期刊论文
源URL	[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.Shanxi Normal Univ, Coll Life Sci, Linfen, Shanxi, Peoples R China 2.China West Normal Univ, Coll Life Sci, Nanchong, Sichuan, Peoples R China 3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 4.Shaoxing Univ, Sch Life Sci, Shaoxing, Zhejiang, 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).