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<p>In the present investigation, an attempt was made to evaluate the impact of heat stress on physico-chemical, antioxidant and phenolic traits of twenty-five heirloom mango varieties conserved at field gene bank of ICAR- CISH, Lucknow under natural field condition. Visible heat stress symptoms (black spots on fruit surface, shrinkage and shrivelling) were recorded on four mango varieties viz., Husn- e-ara (38.46%), Nayab (2.3%), Ramkela (0.05%) and Kakaria (0.01%).&#xa0;Significant variations were recorded for physical, biochemical, antioxidant and phenolic characteristics between healthy and heat stressed varieties.&#xa0;Fruit weight and total soluble solids decreased, while titratable acidity, ascorbic acid, antioxidant activity, phenolics, and flavonoids increased in heat-stressed varieties compared to their healthy counterparts. Healthy mango varieties such as Hanuman Bhog, Sagufta, Nilukriti, and Gola Bhadaiyaan consistently exhibited superior physicochemical and antioxidant characters. Principal Component Analysis (PCA) and hierarchical clustering successfully discriminated healthy and heat stressed varieties and identified Digambar, Hanuman Bhog and Nasewala as outlier varieties with distinct physicochemical, biochemical and antioxidant profiles.&#xa0;Further, Receiver Operating Characteristic (ROC) curve analysis revealed total flavonoid content as the most discriminating biochemical predictor of heat stress status (AUC = 1.0), followed by total phenolic content (AUC = 0.81) and total soluble solids (AUC = 0.80).&#xa0;Amongst the phenolics, caffeic acid and p- coumaric acid were observed as stress biomarkers exclusively detected under heat stress conditions.&#xa0;Candidate varieties and biomarkers identified in the present study provide preliminary insights into the heat stress response of heirloom mango and can be explored further in breeding programmes for development of climate resilient mango cultivars.</p>

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Elucidating Climate Change-induced Heat Stress on the Physico-chemical and Antioxidant Attributes of Heirloom Mango Varieties

  • 期刊论文

  • 发表日期：

    2026年7月25日

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  • Swosti Suvadarsini Das,
  • Thukkaram Damodaran,
  • Anshuman Singh,
  • Vishambhar Dayal,
  • Ashish Yadav,
  • Amar Kant Kushwaha,
  • Ningthoujam Samarendra Singh,
  • Dheerendra Rastogi,
  • Parul Sagar

摘要

In the present investigation, an attempt was made to evaluate the impact of heat stress on physico-chemical, antioxidant and phenolic traits of twenty-five heirloom mango varieties conserved at field gene bank of ICAR- CISH, Lucknow under natural field condition. Visible heat stress symptoms (black spots on fruit surface, shrinkage and shrivelling) were recorded on four mango varieties viz., Husn- e-ara (38.46%), Nayab (2.3%), Ramkela (0.05%) and Kakaria (0.01%). Significant variations were recorded for physical, biochemical, antioxidant and phenolic characteristics between healthy and heat stressed varieties. Fruit weight and total soluble solids decreased, while titratable acidity, ascorbic acid, antioxidant activity, phenolics, and flavonoids increased in heat-stressed varieties compared to their healthy counterparts. Healthy mango varieties such as Hanuman Bhog, Sagufta, Nilukriti, and Gola Bhadaiyaan consistently exhibited superior physicochemical and antioxidant characters. Principal Component Analysis (PCA) and hierarchical clustering successfully discriminated healthy and heat stressed varieties and identified Digambar, Hanuman Bhog and Nasewala as outlier varieties with distinct physicochemical, biochemical and antioxidant profiles. Further, Receiver Operating Characteristic (ROC) curve analysis revealed total flavonoid content as the most discriminating biochemical predictor of heat stress status (AUC = 1.0), followed by total phenolic content (AUC = 0.81) and total soluble solids (AUC = 0.80). Amongst the phenolics, caffeic acid and p- coumaric acid were observed as stress biomarkers exclusively detected under heat stress conditions. Candidate varieties and biomarkers identified in the present study provide preliminary insights into the heat stress response of heirloom mango and can be explored further in breeding programmes for development of climate resilient mango cultivars.