REN Wenqi,PAN Xiongbo,XIANG Lixia,et al.Effect of Different Spraying Frequency of Exogenous γ-aminobutyric Acid on Melon Seedlings Growth Under Ca(NO3)2 Stress[J].Northern Horticulture,2015,39(23):6-10.[doi:10.11937/bfyy.201523002]
不同喷施频率外源γ-氨基丁酸对Ca(NO3)2胁迫下甜瓜幼苗生长的影响
- Title:
- Effect of Different Spraying Frequency of Exogenous γ-aminobutyric Acid on Melon Seedlings Growth Under Ca(NO3)2 Stress
- 关键词:
- Ca(NO3)2胁迫; γ-氨基丁酸; 喷施频率; 甜瓜幼苗; 生长
- Keywords:
- Ca(NO3)2 stress; γ-aminobutyric acid; spraying frequency; melon seedling; growth
- 文献标志码:
- A
- 摘要:
- 以甜瓜品种“金辉1号”（耐盐型）和“一品天下208”（盐敏感型）为试材，采用深液流水培栽培，研究了不同频率（每天、每2 d、每3 d喷1次）喷施50 mmol/L γ-氨基丁酸 （GABA）对80 mmol/L Ca(NO3)2胁迫下甜瓜幼苗生长、可溶性总糖和脯氨酸含量的影响。结果表明：Ca(NO3)2胁迫显著降低了甜瓜幼苗株高、茎粗、地上部干鲜重、根系干鲜重、叶片和根系的可溶性总糖含量，显著提高了脯氨酸（Pro）含量，严重抑制了甜瓜幼苗的生长；Ca(NO3)2胁迫下，外源喷施GABA可明显增加甜瓜幼苗株高、茎粗、地上部干鲜重、根系干鲜重和可溶性总糖含量，降低叶片和根系脯氨酸（Pro）含量，对Ca(NO3)2胁迫引起的甜瓜幼苗生长的抑制作用有所缓解，且喷施频率为每2 d 1次时，这种缓解抑制作用的效果最佳；同时，试验研究发现，外源喷施GABA对盐敏感品种“一品天下208”的盐胁迫缓解效果更好。由此表明，每2 d叶面喷施1次50 mmol/L GABA最有利于提高甜瓜幼苗对Ca(NO3)2胁迫逆境的适应能力，且对盐敏感品种“一品天下208”缓解效果更好。
- Abstract:
- Two melon cultivars ‘Jinhui No.1’ (salt-tolerant) and ‘Yipin Tianxia 208’ (salt-sensitive) were used as experiment materials，using specific melon nutrient of Yamazaki cultivation methods，the effect of different spraying frequency(daily，every two days，every three days) of exogenous γ-aminobutyric acid(GABA 50 mmol/L) on growth，total soluble sugar and proline content (Pro) of melon seedling under Ca(NO3)2 (80 mmol/L) stress were studied.The results showed that Ca(NO3)2 stress significantly reduced the plant height，stem diameter，fresh and dry weight，root fresh and dry weight，total soluble sugar content in melon leaves and roots，and increased Pro content，which indicated that the growth of melon seedlings was severely suppressed under Ca(NO3)2 stress.Under Ca(NO3)2 stress，spraying exogenous GABA could increase plant height，stem diameter，fresh and dry weight of shoot and root and total soluble sugar content and decreased leaves and root Pro content.When the GABA spraying frequency was daily，every two days，every three days，there was a certain role relief of the melon seedling growth under Ca(NO3)2 stress，and the every two days was the best effect.Meanwhile，exogenous GABA spraying had better effect on salt-sensitive species ‘Yipin Tianxia 208’.These results indicated that spraying every two days of 50 mmol/L GABA was beneficial to improve the Ca(NO3)2 stress resistance of melon seedlings and salt-sensitive species ‘Yipin Tianxia 208’ was mitigated better.
参考文献/References:
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备注/Memo
第一作者简介：任文奇（1990-），女，陕西榆林人，硕士，现主要从事设施园艺植物生理等研究工作。E-mail：renwenqi@126.com.责任作者：胡晓辉（1977-），女，河北滦县人，博士，副教授，硕士生导师，现主要从事设施园艺栽培生理等研究工作。E-mail:hxh1977@163.com.基金项目：陕西省科技攻关资助项目（2015NY102，2015NY089）；陕西省科技统筹创新工程计划资助项目（2015KTTSNY03-03）。