Effects of brassinosteroid (24-epibrassinolide) on yield and quality of grape ("Vitis vinifera" L.) 'Thompson Seedless'

• P. Ghorbani ^[1] ; S. Eshghi ^[1] ; H. Haghi ^[2]
  1. [1] Shiraz University

     Shiraz University

     Irán

     
  2. [2] Zanjan University
• Localización: Vitis: Journal of Grapevine Research, ISSN 0042-7500, Vol. 56, Nº 3, 2017, págs. 113-117
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • Berry growth ripening process and yield are directly related with nutrition status and phytohormones during fruit growth and development stages. Brassinosteroid (24-epibrassinolide) is one of the plant growth substances that influence different physiological processes including fruit growth and development. In this study, the effect of brassinosteroid (Br) application on the yield and berry quality of 'Thompson Seedless' was investigated in a commercial vineyard, Malayer, Hamedan, Iran. Br solution concentrations of 0, 0.2, 0.4, 0.6 mg·L-1 at five stages (budbreak (S1), prebloom (S2), middle of bloom (S3), post bloom (S4) and veraison (S5) were sprayed. The results showed that the Br application has significant positive effects on bunch morphology and berry quantity and quality. Among levels of Br, the highest yields were related to the application of Br at the rate of 0.6 mg·L-1 in the post bloom and veraison stages, and the lowest was found in the bud break stage. Spraying Br in the post bloom and veraison stages had the greatest effect on berry quality. Also, the highest content of total phenol and antioxidant capacity were obtained with 0.6 mg·L-1 of Br application at veraison stage. In this study, we provided evidence to show that using steroidal plant hormones (Br) may play an essential role in improving the yield and quality of 'Thompson Seedless'.