Arid
DOI10.1093/jpe/rtx047
Role of mucilage during achene germination and sprout growth of the endangered Tibetan medicinal herb Mirabilis himalaica (Nyctaginaceae) exposed to abiotic stresses
Chen, Yuzhen1; Zhang, Lu1; Lu, Xiao1; Lan, Xiaozhong2; Shen, Man3; Lu, Cunfu1
通讯作者Lu, Cunfu
来源期刊JOURNAL OF PLANT ECOLOGY
ISSN1752-9921
EISSN1752-993X
出版年2018
卷号11期号:2页码:328-337
英文摘要

Aim


Mirabilis himalaica (Nyctaginaceae) is an endangered medicinal plant mainly distributed in the plateau region of northern Tibet, China. The outer surface of M. himalaica achenes is covered by a pectinaceous mucilaginous layer upon hydration. However, the role of the achene mucilage is poorly understood. In this study, we investigated the effects of mucilage on achene germination and sprout growth under abiotic stress to explain how M. himalaica survive the alpine environment.


Methods


We investigated the effect of mucilage on achenes germination by contrast the capacity of water absorption, dehydration and respiration of intact achene and the achene with mucilage removal. We performed abiotic stresses experiments including drought stress, salt stress, cold stress and high temperature stress, and quantified the effects of mucilage removal on achene germination rate, root and shoot lengths of seedlings.


Important Findings


Mucilage is extremely hydrophilic, and the mass of intact achenes can be 9-fold greater than that of demucilaged achenes. The removal of the mucilaginous layer did not significantly change final germination percentages under ideal conditions, but intact achenes (i.e. with mucilage) took longer to germinate. The mucilage significantly decreased seed respiration rates by acting as a physical barrier that prevented oxygen diffusion. Germination rates, shoot and root growth of intact achenes were higher than those of demucilaged ones during exposures to cold, heat, osmotic and salt stresses. Achene mucilage presumably plays an ecologically important role in the life cycle of M. himalaica by aiding the critical achene germination and early seedling growth in the stressful habitats of the plateau region of northern Tibet.


英文关键词Mirabilis himalaica achenes mucilage germination abiotic stresses
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000427134100017
WOS关键词SEED COAT MUCILAGE ; LEPIDIUM-PERFOLIATUM L. ; NEGEV DESERT ; ARTEMISIA-MONOSPERMA ; PLANTAGO-CORONOPUS ; CARRICHTERA-ANNUA ; SECRETORY-CELLS ; OSMOTIC-STRESS ; TEMPERATURE ; DIFFERENTIATION
WOS类目Plant Sciences ; Ecology
WOS研究方向Plant Sciences ; Environmental Sciences & Ecology
来源机构北京林业大学
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/211231
作者单位1.Beijing Forestry Univ, Coll Biol Sci & Biotechnol, Beijing Adv Innovat Ctr Tree Breeding Mol Design, Natl Engn Lab Tree Breeding, Qinhua East Rd 35, Beijing 100083, Peoples R China;
2.Tibet Univ, Agr & Anim Husb Coll, Yucai West Rd 100, Linzhi 860000, Tibet, Peoples R China;
3.Beijing Agr Univ, Coll Plant Sci & Technol, Beunong Rd 7, Beijing 102206, Peoples R China
推荐引用方式
GB/T 7714
Chen, Yuzhen,Zhang, Lu,Lu, Xiao,et al. Role of mucilage during achene germination and sprout growth of the endangered Tibetan medicinal herb Mirabilis himalaica (Nyctaginaceae) exposed to abiotic stresses[J]. 北京林业大学,2018,11(2):328-337.
APA Chen, Yuzhen,Zhang, Lu,Lu, Xiao,Lan, Xiaozhong,Shen, Man,&Lu, Cunfu.(2018).Role of mucilage during achene germination and sprout growth of the endangered Tibetan medicinal herb Mirabilis himalaica (Nyctaginaceae) exposed to abiotic stresses.JOURNAL OF PLANT ECOLOGY,11(2),328-337.
MLA Chen, Yuzhen,et al."Role of mucilage during achene germination and sprout growth of the endangered Tibetan medicinal herb Mirabilis himalaica (Nyctaginaceae) exposed to abiotic stresses".JOURNAL OF PLANT ECOLOGY 11.2(2018):328-337.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Chen, Yuzhen]的文章
[Zhang, Lu]的文章
[Lu, Xiao]的文章
百度学术
百度学术中相似的文章
[Chen, Yuzhen]的文章
[Zhang, Lu]的文章
[Lu, Xiao]的文章
必应学术
必应学术中相似的文章
[Chen, Yuzhen]的文章
[Zhang, Lu]的文章
[Lu, Xiao]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。