WANG Chun-yan,GUO Yu-jia,ZHANG Xiao-qian,et al.Effect of γ-aminobutyric Acid on Growth and Mineral Elements Contents in Cucumber Seedlings Under Different NaCl Concentration[J].Northern Horticulture,2014,38(03):5-8.
不同浓度NaCl胁迫下γ-氨基丁酸对黄瓜幼苗生长及矿质元素吸收的影响
- Title:
- Effect of γ-aminobutyric Acid on Growth and Mineral Elements Contents in Cucumber Seedlings Under Different NaCl Concentration
- 文章编号:
- 1001-0009(2014)03-0005-04
- Keywords:
- cucumber; NaCl stress; GABA; growth; mineral elements
- 分类号:
- S 642.2
- 文献标志码:
- A
- 摘要:
- 以黄瓜品种“津春4号”幼苗为试材，采用营养液栽培法，研究了不同浓度盐（NaCl）胁迫下添加γ-氨基丁酸（GABA）对黄瓜幼苗生长和矿质元素吸收、利用的影响。结果表明：与对照相比，NaCl胁迫处理显著抑制了黄瓜幼苗的生长和K+、Ca2+、Mg2+的含量，而Cl-、Fe2+、Na2+的含量显著提高，其中150 mmol/L NaCl处理比80 mmol/L NaCl处理对黄瓜幼苗的伤害更严重；在2种不同浓度NaCl胁迫下，外源添加γ-氨基丁酸（GABA）均有效缓解了NaCl胁迫对黄瓜幼苗的抑制作用，其中植株地上部鲜重分别比150 mmol/L NaCl和80 mmol/L NaCl处理提高了63.58%和117.21%；试验证明，NaCl浓度越高对幼苗的伤害越重，外源γ-氨基丁酸通过影响植株对矿质营养的吸收可缓解NaCl胁迫对黄瓜幼苗的伤害。
- Abstract:
- Taking cucumber seedlings ‘Jinchun 4’ as material，under hydroponically culture,the effects of exogenous γ-aminobutyric acid (GABA) on growth and mineral elements contents under different NaCl concentration stress were studied.The results showed that compared with the control，the growth of cucumber seedlings were significantly inhibited and the concentration of K+，Ca2+,Mg2+reduced，but the concentration of Cl-，Fe2+，Na2+ increased with NaCl stress treatment.Meanwhile，150 mmol/L NaCl treatment had more significant effect on cucumber seedlings than that of 80 mmol/L NaCl treatment.However，exogenous GABA could effectively alleviate the inhibitory role under different the NaCl concentration on cucumber seedlings，which manifested that the fresh weight of seedlings were increased 63.58% and 117.21% than 150 mmol/L NaCl and 80 mmol/L NaCl treatment respectively.The results suggested that the harm was aggravate with the NaCl concentration increasing and exogenous GABA could alleviate the damage of NaCl stress by influencing the absorption of mineral nutrition in cucumber seedlings.
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备注/Memo
第一作者简介：王春燕（1985-），女，河北省沧州人，硕士研究生，研究方向为设施蔬菜逆境生理生态。E-mail：wangchunyan321@126.com.