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Alkalinity and salinity tolerance during seed germination and early seedling stages of three alfalfa (Medicago sativa L.) cultivars

文献类型： 外文期刊

作者： Zhang, Huihui 1 ; Li, Xin 1 ; Nan, Xu 1 ; Sun, Guangyu 1 ; Sun, Minglong 1 ; Cai, Dunjiang 1 ; Gu, Siyu 1 ;

作者机构： 1.Northeast Agr Univ, Coll Resources & Environm, Harbin 150030, Heilongjiang, Peoples R China

2.Heilongjiang Acad Sci, Nat Resources & Ecol Inst, Harbin 150040, Heilongjiang, Peoples R China

3.Northeast Forest Univ, Coll Life Sci, Harbin 150040, Heilongjiang, Peoples R China

4.Heilongjiang Acad Agr Sci, Inst Crop Breeding, Harbin 150086, Heilongjiang, Peoples R China

5.Heilongjiang Acad Land Reclamat & Agr Sci, Inst Crops, Jiamusi 154007, Heilongjiang, Peoples R China

关键词： Alfalfa;Alkalinity;Salinity;Seed germination

期刊名称：LEGUME RESEARCH （ 影响因子：0.589； 五年影响因子：0.648 ）

ISSN： 0250-5371

年卷期： 2017 年 40 卷 5 期

页码：

收录情况： SCI

摘要： The germination of halophytes in saline-alkali substrates is a useful criterion for selection tolerant alfalfa (Medicago sativa L.) cultivars. The experimental conditions consisted of five levels of salinity (24, 48, 72, 96 and 120 mM) and four pH levels (7, 8, 9 and 10). The results showed that under saline conditions, the germination percentage (G(p)), plumule length (P-l) and radical length (R-l) also decreased with increasing concentration. However, under low or moderate saline conditions, P-l and fresh weight decreased sharply but R-l was the longest at 48 and 72 mM and pH 7.1, which indicated that low salinity may promote radical growth appreciably. Salinity and alkalinity stresses had synergetic effects on G(p), G(e) and G(i) but not on P-l, R-l and fresh weight. The results confirmed G(p), G(i) and G(e) are important indices for assessing germinated energy of alfalfa in salinity-alkalinity soils. Moreover, three alfalfa cultivars tested were relatively tolerant of salinity and alkalinity and Stockpile was the most tolerant cultivar in the present experiment.

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