CAJ | 학술논문

以清白黄瓜为材料，研究外源γ-氨基丁酸(GABA)浸种对不同温度胁迫下黄瓜种子萌发、幼苗生长及光合特性的影响。研究结果表明，次低温(20℃/10℃)、次高温(35℃/28℃)、高温(40℃/35℃)显著抑制了黄瓜种子的萌发和胚根的生长，同时使黄瓜幼苗的株高、壮苗指数、根冠比以及根系活力显著降低，净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)、胞间CO2浓度(Ci)呈现下降趋势。外源GABA浸种能够显著提高温度胁迫下黄瓜种子的萌发和胚根生长速率，并能促进黄瓜幼苗的生长，提高黄瓜叶片的光合特性，其中以10 mmol/L GABA浸种处理效果最好。
이청백황과위재료，연구외원γ-안기정산(GABA)침충대불동온도협박하황과충자맹발、유묘생장급광합특성적영향。연구결과표명，차저온(20℃/10℃)、차고온(35℃/28℃)、고온(40℃/35℃)현저억제료황과충자적맹발화배근적생장，동시사황과유묘적주고、장묘지수、근관비이급근계활력현저강저，정광합속솔(Pn)、기공도도(Gs)、증등속솔(Tr)、포간CO2농도(Ci)정현하강추세。외원GABA침충능구현저제고온도협박하황과충자적맹발화배근생장속솔，병능촉진황과유묘적생장，제고황과협편적광합특성，기중이10 mmol/L GABA침충처리효과최호。
We studied the effects of exogenousγ-aminobutyric acid (GABA) soaking on seed germination, seedling growth and photosynthetic characteristics of Qingbai cucumber under different temperature stress. The results showed that, under sub-low temperature (20℃/10℃), sub-high temperature (35℃/28℃), high temperature (40℃/35℃) conditions, the seed germination and radicle growth of cucumber were inhibited, and the plant height, sound seedling index, root-top ratio and root activity of cucumber seedlings were significantly decreased, in addition, the net photosynthetic rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), intercellular CO2 concentration (Ci) all showed downward trends. In conclusion, exogenous GABA soaking could significantly increase seed germination and radicle growth of cucumber seeds, and also promote the growth of cucumber seedlings and enhance photosynthetic characteristics of cucumber leaves, while the best seed soaking concentration of GABA was 10 mmol/L for cucumber.