NaCl胁迫对不同西瓜品种种子发芽及其幼苗生长特性的影响

Effect of NaCl Stress on the Seed Germination and Seedling Growing Characteristics of Different Watermelon Varieties

用不同浓度NaCl溶液分别对西瓜品种"郑抗2号"、"郑抗3号"、"中科1号"和"中科6号"进行浸种处理,研究不同西瓜品种的耐盐特性并筛选耐盐品种。结果表明:不同浓度NaCl溶液处理对西瓜种子的发芽特性、幼苗生长特性的影响因品种不同而有显著差异。其中种子发芽率、过氧化物酶活力随NaCl浓度的增加而下降,而叶绿素的含量表现为先上升后下降。在4个品种中"郑抗3号"的发芽特性、幼苗生长特性等方面均强于其它品种。

The seeds of four watermelon varieties of＇ Zhengkang No. 2 ＇, ＇ Zhengkang No： 3＇, ＇ Zhongke No. 1 ＇,＇ Zhongke No. 6＇ were treated with NaC1 solutions of different concentration （0,50,100,150,200 mmol/ L）. Studied the characteristics of salt tolerance ＇and screening the salt-by the of germination characteristics and seedling groing traits such as the chlorophyll content and POD activities and other indexes. The results showed that the germination characteristecs and seedling growing traits of the watermelon seeds treated with different NaCI concentration solutions had a significant difference by varieties cultivators, in which with increasing the NaC1 concentration solutions, the germination rate and POD activities declared while the chlorophyll content showed rising fist and then falling . The germination and seedling groing traits of ＇Zhengkang No. 3 ＇ was stronger than other three varites,and it was a salt-tolerance cultivar.