IB-CAS  > 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, Zhaoren1,4; Zhao, Yufei; Zhang, Yuanyuan3; Zhao, Baoshan; Yang, Zhen'an; Dong, Lijia
2019
Source PublicationBMC PLANT BIOLOGY
ISSN1471-2229
Volume19Issue:1
AbstractBackground: 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.
KeywordAtriplex centralasiatica Germination Heteromorphism Local adaptation Seed appendages Temperature and humidity
Subject AreaPlant Sciences
DOI10.1186/s12870-019-2090-6
Indexed BySCI
Language英语
WOS KeywordGERMINATION BEHAVIOR ; DORMANCY ; ARABIDOPSIS ; DISPERSAL ; LIGHT ; SOIL ; BRACTEOLES ; HISTORY ; DIVERSIFICATION ; TEMPERATURE
WOS Research AreaPlant Sciences
WOS IDWOS:000505232500001
PublisherBMC
SubtypeArticle
Publication PlaceLONDON
Funding OrganizationNational Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31700476]
Corresponding Author Emailyza2765@126.com ; Donglijia@126.com
OAgold, Green Published
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ibcas.ac.cn/handle/2S10CLM1/19820
Collection植被与环境变化国家重点实验室
Affiliation1.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
Recommended Citation
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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