盐胁迫下不同基因型棉花萌发生长和离子吸收特性

Characteristics of Growth and Ion Absorbability in Different Genotypes of Cotton at Germinating and Seedling Stages under Salt Stresses

在 0、1 0 0、2 0 0 mmol· L- 1Na Cl处理下 ,对棉花耐盐性差异较大的两个基因型枝棉 3号和泗棉 2号的萌发特性、盐分吸收以及棉花幼苗性状进行了研究。结果表明 ,在 2 0 0 mmol· L- 1Na Cl胁迫 7d后 ,两基因型种子的含水量和子叶 K+含量没有显著差异 ,但耐盐较强品种枝棉 3号 Na+、Cl- 含量和电导率明显低于耐盐较弱品种泗棉 2号。盐胁迫下枝棉

Two genotypes of cotton -Zhimian 3 (salt tolerant) and Simian 2 (salt sensitive) were grown indoors in the light of D lamp of 12 h·d 1 , 20~30℃ on the quartz sand with 1/2 Hoagland solution under the stresses of 0, 100, 200 mmol·L 1 NaCl , respectively. The results showed that the water content in seeds and K + content in cotyledons between two genotype cotton were not significantly different, but the electronic conductivity and Na +, Cl content in cotyledons of Zhimian 3 was significantly lower than that of Simian 2 under the stresses of 200 mmol·L 1 NaCl for 7 days of germination. Zhimian 3 seedlings exhibited the advantages of better propriety against Simian 2 seedlings under NaCl stresses.