Performance Evaluation of New Table Grape Varieties under High Light Intensity Conditions Based on the Photosynthetic and Chlorophyll Fluorescence Characteristics

The evaluation of photosynthetic characteristics plants is important for the success rate germplasm introduction. To select grape varieties with higher adaptability and trait performance, this experiment aimed at evaluating comparing indices, chlorophyll fluorescence parameters, pigment content, leaf five Chinese hybrid varieties. results showed that under high light intensity stress, growth ‘Ruidu Cuixia’ was most affected its specific weight lowest, while ‘Jing Hongbao’ had highest content. maximum net (Pnmax), quantum yield (Fv/Fm), apparent efficiency (AQE) were different among It reported Zaohong’ variety Pnmax. Wuheyi’ found to have Fv/Fm, AQE recorded Cuixia’, intercellular CO2 concentration (Ci) stomatal conductance (gs) 292.56 μmol·mol−1, 766.56 mmol·m−2·s−1, 66.8 μmol·m−2·s−1, respectively. indices ABS/CSm, TRo/CSm, DIo/CSm significantly varieties, these highest. Pn positively correlated Ci Tr, gs Fv TRo/CSm. area negatively Fv/Fm ΦDIo. principal component analysis TOPSIS comprehensive performed best. Overall, measurement during growing period provided valuable data varietal introduction strategies. better performance indicates more long day, intensity, high-temperature climate Xinjiang.