3. BİLSEL INTERNATIONAL SUMELA SCIENTIFIC RESEARCHES CONGRESS
OXALIC ACID: AN ORGANIC ACID EFFECTIVE IN MAINTAINING POST-HARVEST QUALITY
Maintaining the quality of fresh fruits and vegetables after harvest is very difficult as these products are alive after harvest. For this reason, the effects of different practices on the post-harvest quality of fresh fruits and vegetables have been studied for years. In particular, the important effects of applications such as cold storage, modified atmosphere packaging, controlled atmosphere storage, low pressure storage, ozone, ultraviolet light, ultrasound applications have been revealed. In addition to these, 1-methylcyclopropene, melatonin, nitric oxide and edible coatings have also attracted attention in recent years. Apart from these applications, in recent years, the external applications of different organic acids have been examined in terms of increasing their resistance to biotic and abiotic stresses, delaying maturation and aging in the post-harvest period, as well as reducing cold damage. Oxalic acid, which is among the organic acids, is widely found in plants due to its role in different metabolic events during the growth and development of the plant. For this reason, in recent years, researches on increasing the quality and extending the storage life of plants with oxalic acid applications in the pre- and post-harvest period have attracted attention. Oxalic acid is considered to be an antioxidant compound that has the potential to increase the yield of fruits and vegetables, improve fruit quality, and delay post-harvest aging. Pre- and post-harvest application of oxalic acid has been shown to delay maturation and aging by reducing metabolic processes such as water loss, ethylene production and respiration; It has been determined that it preserves the hardness of fruit flesh by reducing oxidative stress, as well as controlling cold damage and enzymatic darkening, and prevents rotting by reducing the microbial load. In this review study, an analysis of the studies on the effects of pre- and post-harvest oxalic acid applications on pre-harvest and post-harvest quality preservation of fresh fruits and vegetables in fruits and vegetables was revealed.
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