Husnain Aftab1, Anas Ahmad2, Muhammad Waseem Ayoub3
Mangifera indica L. commonly known as mango, is considered the king of fruits and in tropical countries it has been considered for a long time as a nutritional powerhouse that provides important vitamins, bioactive compounds and antioxidants for human health. It is produced in more than 50 million tons per annum all over the world with the majority of production in South Asia, especially India and Pakistan, due to its high vitamin C content, beta-carotene, phenol and flavonoids content in varieties such as Sindhri, Chaunsa and Dashehari. However, due to the increasing pace of climate change, characterized by climate variability in rainfall, droughts, and higher temperatures are posing new threats to these nutritional gems. The recent hot days in Pakistan, surpassing 47°C, have caused a significant reduction in mango production of 30-45%, and even some losses in fruit quality, in the provinces of Punjab and Sindh where mangoes form a $200 million export industry and support millions of smallholder growers – creating urgent questions surrounding varietal resilience and its role in nutrition.
This crisis dates back to the origins of mango as an ecosystem species that developed in the context of the monsoon seasons changing with cultivation over hundreds of years. Many traditional varieties (landraces), including Kesar (India) and dussehri (Pakistan), have developed genetic mechanisms to protect their fruit, such as strong heat shock proteins (HSPs) and osmoprotectants, that allow them to sustain fruit integrity in moderate stress. Bred for yield and shelf-life, modern hybrids often fail, and there are significant varietal differences. A research study conducted in 2025 found that cultivars like Dashehari that mature early are severely damaged by heat, resulting in 50% damage to panicles the tips of which turned black and matured prematurely, whereas Kesar, a late season cultivar, does not suffer any damage as it does not mature during the peak of heat stress. Chemically, this is reflected in high total soluble solids (TSS >25° Brix) caused by the release of sugars under stress, but with the disadvantage of lower concentrations and uneven distributions of antioxidants (mostly caryophyllene).
It is these genetic bases which, when exaggerated and/or accentuated by abiotic stresses, constitute the nutritional quality of the fruit, which is its true value. Under normal conditions, varieties such as Mado are more effective than Julie in terms of pro-vitamin A, as it has higher levels ranging from 31.93 to 49.97 µg/100g, compared to a range of 24.45–37.08 µg/100g for Julie. Also, Mado outperforms Julie in its total phenol content, from 51 to 113 mg/100g, while Julie ranges from 24.45 to 37.08 mg/100g. Heat interferes with photosynthetic activity, carbohydrate partitioning and reduces up to 50% ascorbic acid and carotenoids in sensitive genotypes, but transiently increases phenolics as a first line of defense against reactive oxygen species (ROS). This is made worse by osmotic imbalance; proline and glycine betaine increases to protect the cells, but pulp shrinking reduces mineral concentrations such as potassium and zinc which are vital for human nutrition. The disorders of 2025 caused the fruits of Sindhri and Chaunsa varieties to become distorted and sick, resulting in reduced marketable pulp and bioactive yield, according to Multan’s Mango Research Institute, which cherishes these varieties for their ideal Brix (14-18°), pH (3.8-4.2) and acidity for juice production.
Molecular understanding sheds light on why some do well. In a groundbreaking study from 2024, drought-stressed cultivars, such as Guiqi, showed an upregulation of WRKY3 transcription factors and polyamine oxidase 4 genes that drive the production of metabolites including D-sphingosine and phenolic acids, which lead to enhanced ROS quenching. Tainong No.1 is a moderate tolerance and Guiqi’s network is an elite resilience. Similarly, heat causes similar cascades, with LEA proteins and aquaporins helping to stabilize membranes while traditional Indian types have a higher TSS (26.2° Brix) and higher fruit weights (93–552g) than the commercial elites, providing greater nutrition buffering. These patterns are similar to those you found in your maize under elevated CO2 research in semi-arid environments, which also has a close correspondence to the conditions in Punjab.
The effects of reality sets in. The losses in Pakistan in 2025 Rahim Yar Khan are a result of hormonal crashes, making the pods “clean green” (pest free) but fruitless (10% in Sufaid Chaunsa). Growers report 15% of them using zinc/boron sprays and obtaining a recovery rate of 20-30% viability; however winter conditions are unpredictable, leading to alternate bearing and fungal disease. There is no mango specific crop model globally similar to DSSAT for maize, but the projections include a shift in the viable regions towards the north and the loss of premium quality in the tropics. Processing, such as foam mat drying, helps retain bioactives of Sindhri/Chaunsa powders for juice companies in Lahore, while raw loss poses a risk to their survival.
Strategies forward-looking combine tradition and innovation. Climate-smart strategies for Sindhri in SAU aim to minimize deficit irrigation, late pruning, and micronutrient cocktail, which are strategies to achieve stable yields in a +2-4°C warmer environment in Sindh. Breeding for multi-stress tolerance, involves crossing of Kala Chaunsa with Indian hybrids which amplify HSPs and aquaporin genes. Like your DSSAT work on how to optimize maize sowing, precision tools such as genomics and remote sensing allow research to be conducted on phenotyping accessions that are resilient. Fortified pulps with 80% phenolics via cold-chain tech is an eye catcher for exporters. Policymakers advocate subsidies for shade nets and drip systems to help ensure access to mango’s lutein-rich bounty for eye health and immunity for 1 billion consumers.
In the end, the key is varietal selection. Selecting varieties such as Guiqi or Kesar, which require late maturing and high nutrient content, guarantees nutritional equivalence in stressful situations, thus transforming climate challenges into climate opportunities. Public/private hybrids could bring the export throne back for Pakistan, with the use of local genetics—such as the drought advantage of Sindhri and the flavor of Chaunsa. This study is not only about science, it is about saving mango’s crown in the face of chaos – helping farmers, processors, and eaters to survive and thrive in a world of extreme weather. The way forward is action – breed boldly, manage smartly and savor sustainably.
1. Department of Climate Change MNSUAM husnainaftab09@gmail.com
2. Department of Agronomy MNSUAM anasahmad48064@gmail.com
3 Department of Horticulture wasimayoub640@gmail.com
