Effect of salinity on seed germination, growth and ion content in dimorphic seeds of Salicornia europaea L. （Chenopodiaceae）  

作　　者：Nikolai Orlovsky Ulbasyn Japakova Huifan Zhang Sergei Volis 

机构地区：[1]The J. Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, POB, 84990, Israel [2]Scientific Center of Plant Production "Botanika" of Uzbek Academy of Sciences , 2 F. Khodjaev Str.., 700143, Tashkent, Uzbekistan [3]Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650204, China

出　　处：《Plant Diversity》2016年第4期183-189,共7页植物多样性（英文版）

基　　金：This study was supported by a grant from the United States Agency for International Development, Bureau for Economic Growth, Agriculture, and Trade, project number TA-MOU-03-CA23- 032.

摘　　要：The halophyte Salicornia europaea L. is a widely distributed salt-tolerant plant species that produces numerous dimorphic seeds. We studied germination and recovery in dimorphic seeds of Central Asian S. europaea under various salinity conditions. We also tested the effects of various salts on Na＋ and K＋ accumulation during plant development from germination to anthesis under greenhouse conditions. We found good germination （close to control） of large seeds under NaCl between 0.5 and 2%, Na2SO4 and 2NaCl ＋ KCl ＋ CaCl between 0.5 and 3%, and 2Na2SO4 ＋ K2SO4 -- MgSO4 between 0.5 and 5%. For the small seeds, we found stimulating effects of chloride salts （both pure and mixed） under 0.5-1% concentrations, and sulfate salts under 0.5-3%. Both types of seeds showed high germination recovery potential. Salt tolerance limits of the two seed types during germination and at the later stages of development were very similar （4-5%）. During plant growth the optimal concentrations of mixed chloride and sulfate salts ranged from 0.5 to 2%. The mechanisms of salt tolerance in the two seed types of S. europaea appear to differ, but complement each other, improving overall adaptation of this species to high salinity.The halophyte Salicornia europaea L. is a widely distributed salt-tolerant plant species that produces numerous dimorphic seeds. We studied germination and recovery in dimorphic seeds of Central Asian S. europaea under various salinity conditions. We also tested the effects of various salts on Natand Ktaccumulation during plant development from germination to anthesis under greenhouse conditions. We found good germination(close to control) of large seeds under Na Cl between 0.5 and 2%, Na_2SO_4and 2 Na Cl t KCl t Ca Cl between 0.5 and 3%, and 2Na_2SO_4t K_2SO_4t Mg SO4 between 0.5 and 5%. For the small seeds, we found stimulating effects of chloride salts(both pure and mixed) under 0.5e1% concentrations, and sulfate salts under 0.5e3%. Both types of seeds showed high germination recovery potential. Salt tolerance limits of the two seed types during germination and at the later stages of development were very similar(4e5%). During plant growth the optimal concentrations of mixed chloride and sulfate salts ranged from 0.5 to 2%. The mechanisms of salt tolerance in the two seed types of S. europaea appear to differ, but complement each other, improving overall adaptation of this species to high salinity.

关 键 词：Dimorphic seeds Germination Salinity Recovery Ion content 

分 类 号：Q945[生物学—植物学]