Leaf Removal Treatments Combined with Kaolin Particle Film Technique from Different Directions of Grapevine's Canopy Affect the Composition of Phytochemicals of cv. Muscat Hamburg (V-Vinifera L.)

Abstract

In some viticulture regions of the world, high temperature and irradiance can negatively affect the grapevine growth and grape quality. Particle film technology is a remarkable tool, leading to decrease in environmental stress conditions for grape production. In current study, leaf removal and kaolin particle film treatments were performed on east and west sides of grapevine's canopy of cv. Muscat Hamburg and five different treatments were respectively evaluated: Control (C), leaf removal treatment from east side of grapevine's canopy (LR-E), leaf removal treatment from east side of grapevine's canopy plus kaolin particle film treatment (LR-E + K), leaf removal treatment from west side of grapevine's canopy (LR-W), leaf removal treatment from west side of grapevine's canopy plus kaolin particle film treatment (LR-W + K). In present research, the higher total phenolic compounds contents were measured in LR-W (2010.56 mg GAE/kg fw), LR-W + K (2006.42 mg GAE/kg fw), LR-E (1925.58 mg GAE/kg fw), LR-E + K (1913.15 mg GAE/kg fw) and C treatment (1851.46 mg GAE/kg fw). Furthermore, means of higher total anthocyanin content were obtained from LR-W (737.68 mg GAE/kg fw), LR-W + K (736.16 mg GAE/kg fw), LR-E (706.50 mg GAE/kg fw), LR-E + K (701.94 mg GAE/kg fw) and C treatment (679.12 mg GAE/kg fw). Consequently, it was observed that both LR-W and LR-W + K treatments had especially advantages in terms of increasing grape quality attributes of cv. Muscat Hamburg; were followed by LR-E and LR-E + K treatments.