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Tag : Postharvest

How can metabolomics help postharvest science?

Up to date, postharvest science has been using much genomics, and started using transcriptomics and proteomics recently. Gene expression resulting from natural processes, plant-microbe interactions, physiological disorders or, biotic or biotic stresses or other inducing phenomena, trigger many metabolic processes leading to the formation of hundreds of metabolites. Besides being specific to metabolic pathway, some of these metabolites have a very short life time and are indicators of specific metabolic reaction. Indeed, many metabolites are well known to be elicited during specific stresses, and these elicited components could be involved in accelerating undesirable processes, or to the contrary, triggering certain resistance of commodities to these undesirable processes. Metabolome profiling of the system biology constitutes a good survey of the different metabolites resulting from different reactions of different pathways. Profiling the metabolites preceding, during and/or following the stresses or any other process, would indicate the behavior of the produce not only at the whole level, but also at the cellular, even the compartmental (cell organelles) levels. This understanding would likely help to determine the appropriate conditions of storage and/or the physical treatments, such as modified atmosphere/controlled atmosphere, to divert the metabolism towards the desired pathway, or at least slow down the production of the undesirable metabolites by reducing the speed of the respective reactions. The issues of these results will also lead to make commodities acquire a self-defense, and extending the shelf-life of commodities with less stress and better quality attributes.... Read more

Postharvest Technology of Horticultural Crops in Developed vs. Developing Countries

The keys to successful handling of horticultural perishables, listed in the second to the fifth paragraphs below, are the same in developed and developing countries, but the extent of adoption of the necessary harvesting and postharvest technologies to maintain their quality and safety can vary greatly among countries and within each country, depending on the intended market and the return on investment, ROI (benefit/cost ratio) of these technologies. Availability and cost of labor, scale of operation, availability and dependability of electric power and its cost, and extent of utilization of facilities and equipment per year are important factors in determining ROI of harvesting and postharvest technologies. Availability and efficient use of the cold chain for handling fresh horticultural products is much more evident in developed countries than in developing countries. There is also great variation among and within countries in the extent of compliance with quality standards and food safety regulations, which is associated with the extent of participation in global marketing of fresh produce.... Read more