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Accueil du site → Doctorat → Inde → 2016 → Mitigating Effect of Nitric Oxide and Brassinosteroid in Tomato Lycopersicon esculentum Mill under Drought Stress

Banaras Hindu University (2016)

Mitigating Effect of Nitric Oxide and Brassinosteroid in Tomato Lycopersicon esculentum Mill under Drought Stress

Jangid, Krishna Kumar

Titre : Mitigating Effect of Nitric Oxide and Brassinosteroid in Tomato Lycopersicon esculentum Mill under Drought Stress

Auteur : Jangid, Krishna Kumar

Université de soutenance : Banaras Hindu University

Grade : Doctor of Philosophy (PhD) 2016

Résumé partiel
Tomato (Lycopersicon esculentum Mill.) belonging to family solanaceae, is the second most important vegetable crop in the world after potato. It originated from Peruvian and Mexican region or South America. Being a day neutral plant, it is cultivated worldwide and can be grown in a wide range of soils, but a well-drained sandy loam with pH of 5 to 7 is preferred. India is the second largest producer of tomato, accounting for 10.58% of the world’s production and the second largest in terms of acreage. India covered area of about 1.2 million hectare for tomato production in 2013-14. The production of tomato in India has been about 19.40 million tonnes in 2013-14 with the productivity 16.1 MT/HA. The leading tomato growing states are Bihar, Karnataka, Uttar Pradesh, Orissa, Andhra Pradesh, Maharashtra, Madhya Pradesh and Assam. Stress is an adverse condition in which plant is influenced by external factors such as low and abundant water, high and low temperature, light which exert disadvantageous effects. Drought stress is a condition in which water availability for plant is so low that it is unfavorable for growth and development, considered a restriction factor for plant products. Availability of water is the most important limiting factor for plant growth and development in the world which can influence physical and chemical function of the plant. In the world, about 40-60% of the agricultural land suffers from drought. In India, 68% of total cultivated area is reported to be drought affected while 50% of this area is severely drought affected, where drought is a regular feature. Decreased water status affects physiological process, nutrient uptake, growth parameters, yield and quality of tomato plants. According to the fifth assessment report of IPCC, drought is outcome of current climate related extremes. In India, drought is a regular problem which affects agriculture production and life of animals and humans frequently. Of the total geographical area of India, two third parts receive rainfall less than 1000 mm which is not distributed equally.

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Page publiée le 13 février 2021