GABA浸种对高pH胁迫下甜瓜种子萌发的影响  

Effect of Seed Soaking with GABA on the Germination of Melon Seeds Under High pH Stress

作　　者：曲斌[1] 邹志荣[1] 

机构地区：[1]西北农林科技大学园艺学院,陕西杨凌712100

出　　处：《黑龙江农业科学》2015年第8期73-76,共4页Heilongjiang Agricultural Sciences

基　　金：国家"十二五"科技支撑计划资助项目(2014BAD14B06)

摘　　要：为探讨外源γ-氨基丁酸(GABA)对盐碱胁迫下甜瓜种子萌发的影响,以一品天下208(敏感品种)甜瓜种子为试材,不同浓度GABA(0、0.5、1.0、2.5和10.0 mmol·L-1)浸种6h后,在pH为10.80的溶液中(27℃)黑暗培养5d,研究外源GABA对甜瓜种子发芽率、活力指数、胚根长、胚芽长和芽苗总鲜重、胚芽内丙二醛和脯氨酸含量的影响。结果表明:高pH胁迫处理显著降低了甜瓜种子的发芽率、活力指数、胚根长、胚芽长和芽苗总鲜重及脯氨酸含量,增加了MDA含量,抑制了甜瓜种子的萌发。而外源GABA浸种处理可以缓解高pH胁迫对甜瓜种子萌发的抑制作用,以10.0mmol·L-1 GABA浸种处理效果最佳。In order to explore the effects of exogenousy-aminobutyric acid（GABA）on melonseeds germination under high pH condition,the melon （cv. Yinpin208） seeds presoaked with different contents of GABA （0,0.5, 1.0,2.5,10.0 mmol· L^-1） for 6 hours, and training under normal or pH 10.80 condition in growth cabinet at 27℃for 5 days in darkness. The effect of GABA on melon seeds germination was researched. The results showed that high p H stress significantly reduced the germination rate,vigor index,length of radicle and embryo,fresh weight,and proline content,andincreased the MDA content which result to inhibit melon seeds germination. While,exogenous GABA presoaked treatments could alleviate the inhibition effects of high pH stress and 10. 0 mmol· L^-1 GABA soaking treatment had the best effects on melon germination under high pH stress.

关 键 词：Γ-氨基丁酸 甜瓜 高pH胁迫 种子萌发 

分 类 号：S652[农业科学—果树学]