Light, Shade, and Temperature Effects on Date Palm Fruits Ripening, Pigments, and Phytohormones | ||
| International Journal of Horticultural Science and Technology | ||
| دوره 14، شماره 1، بهار 2026، صفحه 171-188 اصل مقاله (908.42 K) | ||
| نوع مقاله: Research paper | ||
| شناسه دیجیتال (DOI): 10.22059/ijhst.2025.395032.1084 | ||
| نویسندگان | ||
| Hussein J. Shareef* 1؛ Yakov KUZYAKOV2 | ||
| 1university of Basrah | ||
| 2Kazan Federal University | ||
| چکیده | ||
| Optimizing light, shade, and temperature conditions can substantially enhance the growth, yield, and quality of date palm fruits. This study evaluated the effects of light intensity, shading (via bagging), and temperature on the physiological and biochemical characteristics of date palm fruits, with a focus on pigment biosynthesis and phytohormonal regulation during ripening. Four cultivars, ‘Barhee’, ‘Braim’, ‘Khassab’, and ‘Hellawi’, were examined under two light regimes (direct sunlight and paper-bag-induced shade) across four developmental stages from June to August. Chlorophyll levels declined progressively in all cultivars as ripening advanced, with more rapid degradation observed under shaded conditions. In contrast, anthocyanin and carotenoid contents generally increased under shade conditions, particularly in ‘Braim’ and ‘Hellawi’, contributing to enhanced fruit coloration. Shading also helped preserve phenolic compounds, while light-exposed fruits exhibited higher ascorbic acid levels, indicating a physiological trade-off between antioxidant accumulation and oxidative stress. Shade treatments promoted higher levels of growth-related hormones, indole-3-acetic acid (IAA), gibberellic acid (GA3), and cytokinins, during mid-season stages, and elevated abscisic acid (ABA) levels during late ripening, suggesting enhanced developmental regulation and stress adaptation. Bagging effectively moderated the fruit microclimate by reducing temperature and increasing relative humidity, thereby improving fruit quality and ripening dynamics. These findings support the use of controlled shading as a practical agronomic strategy to enhance date palm fruit quality under climate stress, while highlighting the importance of cultivar-specific responses in optimizing management practices. | ||
| کلیدواژهها | ||
| Chlorophyll؛ Date palm cultivation؛ Light and shade conditions؛ Temperature؛ Plant hormones؛ Sustainable agriculture | ||
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آمار تعداد مشاهده مقاله: 185 تعداد دریافت فایل اصل مقاله: 190 |
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