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‘Himsagar’, ‘Fazli’, ‘Langra’, ‘Dashehari’, ‘Totapuri’ and ‘Neelum’ popularly grown in different agro-climaticregions in India. Significant differences in gas exchange and leaf morphological characters were observedamong cultivars. Higher photosynthesis rate (PN) was recorded in ‘Borsha’, ‘Himsagar’, ‘Langra’ and ‘Neelum’. Across the cultivars PN and CE (carboxylation capacity) were highest in ‘Neelum’ followedby ‘Borsha’. ‘Langra recorded highest WUE and WUEi. The SLA and SLW were maximum in ‘Totapuri’and ‘Dashehari’ respectively. Maximum epicuticular wax content (ECW) was observed in ‘Totapuri’. Thecontent of Chl a, Chl b, total chlorophyll and carotenoids was highest in ‘Alphonso’. Adaxial and abaxial stomatal numbers were highest in ‘Totapuri’ and ‘Langra’, respectively. The variations in leaf morphology, gas exchange and related traits may be linked to genotypic variation suitable for different agro-climatic regions in India.‘Himsagar’, ‘Fazli’, ‘Langra’, ‘Dashehari’, ‘Totapuri’ and ‘Neelum’ popularly grown in different agro-climaticregions in India. Significant differences in gas exchange and leaf morphological characters were observedamong cultivars. Higher photosynthesis rate (PN) was recorded in ‘Borsha’, ‘Himsagar’, ‘Langra’ and ‘Neelum’. Across the cultivars PN and CE (carboxylation capacity) were highest in ‘Neelum’ followedby ‘Borsha’. ‘Langra recorded highest WUE and WUEi. The SLA and SLW were maximum in ‘Totapuri’and ‘Dashehari’ respectively. Maximum epicuticular wax content (ECW) was observed in ‘Totapuri’. Thecontent of Chl a, Chl b, total chlorophyll and carotenoids was highest in ‘Alphonso’. Adaxial and abaxial stomatal numbers were highest in ‘Totapuri’ and ‘Langra’, respectively. The variations in leaf morphology, gas exchange and related traits may be linked to genotypic variation suitable for different agro-climatic regions in India.ICA

Diversity in leaf morphology and physiological characteristics amongmango (Mangifera indica) cultivars popular in different agro-climaticregions of India

The present study was aimed to characterize eight different mango cultivars, viz., ‘Alphonso’, ‘Borsha’,‘Himsagar’, ‘Fazli’, ‘Langra’, ‘Dashehari’, ‘Totapuri’ and ‘Neelum’ popularly grown in different agro-climatic regions in India. Significant differences in gas exchange and leaf morphological characters were observed among cultivars. Higher photosynthesis rate (PN) was recorded in ‘Borsha’, ‘Himsagar’, ‘Langra’ and ‘Neelum’. Across the cultivars PN and CE (carboxylation capacity) were highest in ‘Neelum’ followed by ‘Borsha’. ‘Langra recorded highest WUE and WUEi. The SLA and SLW were maximum in ‘Totapuri’ and ‘Dashehari’ respectively. Maximum epicuticular wax content (ECW) was observed in ‘Totapuri’. The content of Chl a, Chl b, total chlorophyll and carotenoids was highest in ‘Alphonso’. Adaxial and abaxial stomatal numbers were highest in ‘Totapuri’ and ‘Langra’, respectively. The variations in leaf morphology, gas exchange and related traits may be linked to genotypic variation suitable for different agro-climatic regions in India.IIH

Response of tomato (Lycopersicon esculentum Mill.) genotypes to elevated temperature

Not AvailableGlobal warming is an important issue threatening agriculture and allied sectors with serious consequences on food production. Tomato being sensitive to temperature would be influenced by elevated temperatures under climate change scenarios. Physiological response of five tomato genotypes, Arka Vikas, Arka Saurabh, Abhinava, RF4A and 2195 to mild elevated temperatures at peak flowering and peak fruiting stages was evaluated in temperature gradient tunnel (TGT) facility. The increase in temperature above the optimal, caused reductions in net photosynthesis rate, transpiration and stomatal conductance with differences in response among the five genotypes. The reductions were large at peak flowering stage compared to peak fruiting stage. The Photochemical efficiency of PSII was also reduced at both peak flowering and fruiting stages due to increase in temperature. At peak fruiting stage, due to increase in temperature, leaf epicuticular wax content increased across the genotypes and higher total soluble sugars, reducing sugars and proline content contributed to increase in leaf osmotic potential. Overall, better performance of germplasm line 2195 and cv. Arka Vikas was observed under elevated temperature.ICAR under NICRA projec