%A Lulong Sun, Wei Song, Yuanpeng Du, Heng Zhai %T Application of Photochemical Reflectance Index in Comparing Frost Resistance of Grapevine Cultivars %0 Journal Article %D 2017 %J Chinese Bulletin of Botany %R 10.11983/CBB16123 %P 543-549 %V 52 %N 5 %U {https://www.chinbullbotany.com/CN/abstract/article_3172.shtml} %8 2017-09-01 %X

Leaves of 12 grapevine cultivars were selected as materials and collected in the fall. The photochemical reflectance index (PRI) in leaves was measured after frost treatment. Effective parameters were calculated and used in functional value analysis to compare the cold hardiness of leaves. Cooling temperature led to a trend of declining PRI. PRI and its relative value (Rt) had a good linear relationship with temperature in the range of -8 to 0°C. Relative values at both 0°C and -8°C (R0, R-8) differed among cultivars, as did the slope of regressions in the range of -8 to 0°C and can be used as parameters to reflect the cold hardiness of leaves. Functional value analysis and cluster analysis showed that the most cold-hardiness cultivar in leaves was Cabernet Sauvignon (Vitis vinifera), with R0, R-8, and SLP values at 72.3%, 50.19%, and 2.78, respectively.