Germination, Growth, Chlorophyll Fluorescence and Ionic Balance in Linseed Seedlings Subjected to Saline and Alkaline Stresses

CORC > 中国农业科学院 > 农业环境与可持续发展研究所 > 旱作节水研究室

	Germination, Growth, Chlorophyll Fluorescence and Ionic Balance in Linseed Seedlings Subjected to Saline and Alkaline Stresses
	Guo, Rui 1; Zhou, Ji 2; Hao, WeiPing 1; Gu, FengXuex 1; Liu, Qi 1; Li, HaoRu 1; Xia, Xu 1; Mao, LiLi 1
刊名	PLANT PRODUCTION SCIENCE
	2014
卷号	17 期号:1 页码:20-31
关键词	Alkaline stress Linseed Saline stress
ISSN号	1343-943X
通讯作者	Guo, Rui
英文摘要	Both saline and alkaline stresses involve osmotic stress and ion injury; however, alkaline stress involves the stress due to a high pH. The aim of this study was to evaluate the physiological responses of linseed seeds and seedlings to saline and alkaline stresses and to elucidate the adaptive mechanisms involved. Stresses were generated by exposure to neutral saline solutions of saline stress and alkaline stress for 7 days. The relative growth rate (RGR) and water content (WC) of linseed seedlings were scarcely affected by salinity stress, but significantly reduced by alkaline stress. Photosynthetic activity and pigment indices were hardly changed under saline stress but were inhibited by alkaline stress. This implies that alkaline stress may be mediated by Na+ uptake and accumulation up to toxic levels, leading to a decrease in photosynthetic pigments and damage to the photosynthetic apparatus. Alkaline stress causes precipitation of phosphate and metal ions which causes a sharp decrease in ionic activity and in the concentrations of various other ions. The results indicated that carbohydrates and proline synthesis decreased osmotic potential, remedied the shortage of inorganic anions and maintained stabifity of the intracellular pH allowing the plant to cope with osmotic stress from a high Na+. vacuolar concentrations. However, the contribution of betaine to osmotic adjustment was small in linseed seedlings. With increasing solution concentrations, the rate of germination of linseeds was more severely inhibited under alkaline stress than under saline stress.
学科主题	Agronomy
语种	英语
出版者	CROP SCIENCE SOC JAPAN
WOS记录号	WOS:000333569900003
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/19823]
专题	农业环境与可持续发展研究所_旱作节水研究室
作者单位	1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr IEDA, Key Lab Dryland Agr, Minist Agr, Beijing 100081, Peoples R China 2.Minist Land & Resources, Land Consolidat & Rehabil Ctr, Beijing 100000, Peoples R China
推荐引用方式 GB/T 7714	Guo, Rui,Zhou, Ji,Hao, WeiPing,et al. Germination, Growth, Chlorophyll Fluorescence and Ionic Balance in Linseed Seedlings Subjected to Saline and Alkaline Stresses[J]. PLANT PRODUCTION SCIENCE,2014,17(1):20-31.
APA	Guo, Rui.,Zhou, Ji.,Hao, WeiPing.,Gu, FengXuex.,Liu, Qi.,...&Mao, LiLi.(2014).Germination, Growth, Chlorophyll Fluorescence and Ionic Balance in Linseed Seedlings Subjected to Saline and Alkaline Stresses.PLANT PRODUCTION SCIENCE,17(1),20-31.
MLA	Guo, Rui,et al."Germination, Growth, Chlorophyll Fluorescence and Ionic Balance in Linseed Seedlings Subjected to Saline and Alkaline Stresses".PLANT PRODUCTION SCIENCE 17.1(2014):20-31.