نوع مقاله : مقاله پژوهشی
نویسندگان
گروه علوم باغبانی و فضای سبز، دانشکده کشاورزی، دانشگاه ملایر، ملایر، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The present study was carried out in order to investigate the effect of foliar spray of chitosan (CTS; 0, 5, 10 and 20 gr/L) in wooly bud stage (late March) on budburst time and physiological indices related to spring cold tolerance of Yaghooti grapevine during 2021 and 2022. Based on the results, budburst time in vines treated with 10 gr/L CTS was delayed up to 8 days compared to the control vines. Also, CTS at 20 g/L, increased abscisic acid and decreased gibberellic acid in the bud of grapevines. Furthermore, the 20 g/L of CTS caused a 15.16% increase in the bud water content and a 33.24% decrease in ionic leakage of plant compared to the control. The vines sprayed with CTS, especially the concentration of 10 and 20 g/L, had the highest amount of proline, protein, carbohydrates, soluble sugars, total phenol and activity of antioxidant enzymes. In addition, the lowest accumulation of MDA content and H2O2 occurred in the leaves of grape in the treatment of 20 g/L CTS. With the increase in CTS concentration, the amount of leaf photosynthetic pigments and bud endogenous polyamines in the leaves of grapevine increased. Vines treated with 10 g/L of CTS had more potassium, phosphorus and calcium content. In general, spraying with CTS at 10 and 20 gr/L in wooly bud stage through affecting bud’s hormones, polyamines and other physiological indices while inducing cold tolerance, delayed budburst time up to 8 days in Yaghooti grape.
کلیدواژهها [English]
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