NaCl胁迫对不同染色体倍性西瓜种子发芽特性的影响  

Effect of NaCI Stress on Germination Characteristics of Different Ploidy Watermelon

作　　者：阎志红[1] 刘文革[1] 石玉宝[1] 刘海勇[1] 

机构地区：[1]中国农业科学院郑州果树研究所,郑州450009

出　　处：《中国农学通报》2005年第1期204-207,共4页Chinese Agricultural Science Bulletin

基　　金：国家863计划子课题项目(No:2001AA241173)河南省自然科学基金项目(No:0211030900)。

摘　　要：用盐水浸种催芽方法,通过对蜜枚西瓜的二倍体、三倍体、四倍体在不同浓度NaCl胁迫下种子的发芽率、胚轴长度以及鲜重、发芽指数、活力指数等指标的测定,在30-90mmol／L低浓度下,倍性之间相对发芽率没有明显差异;在120 mmol／L以上浓度时,不同倍性之间差异明显,在150mmol／L NaCl胁迫下。其M4x、M3x、M2x相对发芽率分别为77.8％、63.4％、30.6％,180mmol／L时分别为37.8％、31.7％、0,在210mmol／L时,M4x和M3x仍然有种子萌发,耐盐性为M4x>M3x>M2x。seeds ot different ploidy watermelon were evaluated lor germination under 0,30,60,90,120,150, 180,210 mmol/L NaCl stress. The results showed that relative germination percentage of different ploidy watermelon seed have no significant difference under low NaCl concentrate, however there was significant decreased over 120 mmol/L NaCl concentrate . At 150 mmol/L, relative germination percentage among M4x、M3x、M2x was 77.8%、63.4%、30.6%, respectively, their relative germination percentage was 37.8%、31.7%、0 at 180 mmol/L, respectively. At 210 mmol/L , several seeds of M4x was germinated. The seeds salt-resistance qualities of different ploidy watermelon were: M4x>M3x>M2x.

关 键 词：发芽率 NACL胁迫 发芽特性 西瓜种子 染色体倍性 鲜重 浸种催芽 下种 二倍体 耐盐性 

分 类 号：S651[农业科学—果树学] S562[农业科学—园艺学]