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以“赤霞珠”(‘Cabernet Sauvignon’)和“梅鹿辄”(‘Merlot’)葡萄品种为试材,采用控水方式进行干旱胁迫,对比分析了干旱胁迫过程中葡萄叶片超微弱发光(UWL)与光合作用的关系。结果表明:在干旱胁迫过程中,葡萄叶片的光合指标均有明显变化,净光合速率(assimilation rate,A)、气孔导度(stomatal conductance,Gs)、蒸腾速率(transportation rate,E)均随胁迫程度的加深呈下降趋势,胞间CO_2浓度(internal CO_2concentration,Ci)呈上升趋势;UWL强度随胁迫程度的加深呈逐渐下降趋势。相关分析表明,UWL强度与净光合速率、气孔导度、蒸腾速率、叶绿素含量呈正相关,与胞间CO_2浓度呈负相关。试验表明,随着干旱胁迫程度加重,UWL强度随光合作用的减弱而降低,二者相关性显著,UWL与光合作用有关。
Cabernet Sauvignon and Merlot grape cultivars were used as experimental materials to control the drought stress by using water control method. The effects of drought stress on the growth of grape leaves Relationship between ultraweak luminescence (UWL) and photosynthesis. The results showed that during the drought stress, the photosynthetic indexes of grape leaves obviously changed. The assimilation rate (A), stomatal conductance (Gs) and transpiration rate (E) The degree of deepening showed a downward trend, and the intercellular CO 2 concentration (Ci) showed an upward trend. The intensity of UWL decreased gradually with the degree of stress. Correlation analysis showed that there was a positive correlation between UWL intensity and net photosynthetic rate, stomatal conductance, transpiration rate and chlorophyll content, but negatively correlated with intercellular CO 2 concentration. The results showed that with the aggravation of drought stress, the UWL intensity decreased with the decrease of photosynthesis, and the correlation was significant. UWL was related to photosynthesis.