Mango - Postharvest Biology and Biotechnology

Mango is one of the choicest fruits in the world and popular due to its delicate taste, pleasant aroma and nutritional value. Mango is indigenous to north-east India and north Burma, but now grown in over 90 countries. In the past two decades, mango production has increased appreciably with international trade jumping approximately four-fold valued close to US$ 950 million. Mango belongs to the category of climacteric fruits and its ripening is initiated and proceeded by a burst in ethylene production and a dramatic rise in the rate of respiration. Although there are a few hundred mango cultivars grown in the Indian subcontinent and other parts of the world, the most popular cultivars are generally highly perishable and ripen within 7 to 9 days of harvest at ambient temperature. Currently, the export potential and international trade of mango is limited due to several factors such as its perishable nature, disease and pest infestation, and susceptibility of certain premium cultivars to chilling injury when stored at low temperatures. Efforts are ongoing to develop technologies for improved storage and packaging, and overcome limitations encountered during storage and transit. Controlled atmosphere (CA) and hypobaric storage of mango are powerful means to overcome its perishable nature. The composition of CA varies among cultivars to ensure its original taste, flavor and aroma. Edible coating on the fruit skin may further cut down the rate of deterioration. Recently, significant advances have been made in understanding ripening characteristics of mango at the molecular level. Candidate genes related to ethylene biosynthesis and signalling, cell wall modification, aroma production and stress response have been cloned and characterized for future use in mango improvement. Efforts are also being made to establish a suitable transformation and plant regeneration system so that transgenic mango with added value and increased shelf life for long distance transportation could be developed.     

Biotechnology policy and achievement 1980-88

Much progress has been made in line with the spirit of Spinks, but it is inevitable that perspectives have changed since 1980. At the research level, we know that much strategic work remains to be done before the full industrial benefits of biotechnology can be secured, even though there has been a gratifying improvement in academic-industrial liaison. The industrial progress and dissemination of biotechnology has been slower than Spinks implied, but we have a clear understanding of the importance of such contributors to the climate for investment as balanced regulation, training and public perception. The international dimension is important not only for the potential benefit of research and development programmes but also to monitor progress in the U.K. with respect to our competitors. Biotechnology now finds itself in a new framework of Government policy for innovation; there are new challenges in sustaining and adding to the impetus built up by the academic and industrial communities.