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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150mmol/L NaCl处理比80mmol/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150mmol/L NaCl和80mmol/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。
The seedlings of cucumber variety Jinchun 4 were used as experimental materials to study the effects of γ-aminobutyric acid (GABA) supplementation on cucumber seedling growth and mineral element absorption under different concentrations of salt (NaCl) Impact of exploitation. The results showed that NaCl stress significantly inhibited the growth and the contents of K +, Ca2 + and Mg2 + in cucumber seedlings, while the content of Cl-, Fe2 + and Na2 + significantly increased compared with the control The treatment of cucumber seedlings harmed more seriously. Exogenous γ-aminobutyric acid (GABA) supplemented with exogenous γ-aminobutyric acid (GABA) effectively alleviated the inhibitory effect of NaCl stress on cucumber seedlings under the two different concentrations of NaCl stress. The shoot fresh weight The treatments of 150 mmol / L NaCl and 80 mmol / L NaCl increased 63.58% and 117.21%, respectively. The results showed that the higher the concentration of NaCl, the heavier the damage of seedlings, the more exogenous γ-aminobutyric acid could relieve NaCl by affecting plant nutrient absorption Stress cucumber seedling damage.