Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1093/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
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ISSN | 1752-9921 |
EISSN | 1752-993X |
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. |
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