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以新郁葡萄(葡萄品种)扦插苗为材料,采用盆栽实验方法,研究了在不同浓度的NaCl处理下其光合色素含量和光合特征参数的变化趋势。结果表明,新郁葡萄叶片中的叶绿素a和叶绿素b含量均随着NaCl浓度的增加而逐渐减少,NaCl浓度为200,250mmol/L时,其叶绿素a、叶绿素b含量极显著低于对照。随着NaCl浓度增加,新郁葡萄净光合速率、蒸腾速率和气孔导度均逐渐下降,而水分利用效率和胞间CO2浓度均呈现出先保持平衡(NaCl为0～150mmol/L)后缓慢上升(NaCl为200～250mmol/L)的趋势。新郁葡萄表现出一定的耐盐特性,NaCl浓度为25mmol/L时,新郁葡萄没有受到盐害;NaCl浓度在50～150mmol/L时,NaCl对新郁葡萄光合作用的影响逐渐明显,而NaCl浓度等于大于150mmol/L时,其叶绿素含量和净光合速率均显著下降,但净光合速率仍为正值,说明新郁葡萄仍然能存活。
Taking the seedlings of Xinyu grape (grape variety) as materials, pot experiments were conducted to study the changes of photosynthetic pigment content and photosynthetic parameters under different NaCl concentrations. The results showed that the content of chlorophyll a and chlorophyll b in grape leaves decreased with the increase of NaCl concentration. When the NaCl concentration was 200 and 250 mmol / L, the content of chlorophyll a and chlorophyll b was significantly lower than that of the control. The net photosynthetic rate, transpiration rate and stomatal conductance decreased with the increase of NaCl concentration, while the water use efficiency and intercellular CO2 concentration showed the first equilibrium (NaCl was 0 ~ 150mmol / L) and then slowly increased NaCl is 200 ~ 250mmol / L) trend. The fresh grape had certain salt tolerance. When the NaCl concentration was 25mmol / L, the fresh grape had no salt damage. When the NaCl concentration was 50 ~ 150mmol / L, the effect of NaCl on the photosynthesis of the new grape was gradually obvious, When NaCl concentration was more than 150mmol / L, the chlorophyll content and net photosynthetic rate decreased significantly, but the net photosynthetic rate was still positive, indicating that the new grape could still survive.