Browsing by Author "Chitdeshwari, T"

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    Calcium influences biochemical and antioxidant enzymatic activities in tomato fruits during storage
    (Open Science Publishers LLP, 2023-03) Santhosh, S; Chitdeshwari, T; Chinnasamy, K.
    Postharvest quality maintenance of tomatoes is very crucial because of its perishable nature. Calcium, directly involved in the physiological process and enzymatic activities, thereby helps in maintaining the postharvest quality. Increasing calcium concentration reduces respiration and ethylene production in succession; it increases the shelf life and quality of tomatoes. Hence, a field experiment was conducted with different sources and levels of Ca, namely, calcium sulfate, calcium nitrate, calcium silicate, poultry manure, and press mud applied at 0, 20, 40, 60, and 80 kg Ca ha?1. Ripened tomatoes were harvested from each plot. Eight fruits were selected randomly from every treatment and divided into destructive and nondestructive samples, arranged in a factorial completely randomized block design for conducting a storage study. Shelf life, ascorbic acid, lycopene, beta-carotene, and polygalacturonase were analyzed at a 5-day interval up to 15 days. The results revealed that the effect of calcium sources had significant (p ? 0.05) impacts on fruit quality. The tomatoes harvested from poultry manure retained the highest shelf life (15 days) at 80 kg Ca ha?1 and the highest ascorbic acid content (37.5 mg 100 g?1) at 60 kg Ca ha?1. However, the lowest lycopene (2.86 mg 100 g?1), beta-carotene (1.81 mg 100 g?1), and lesser polygalacturonase activity (1.99 kj m?2) were obtained with poultry manure at 80 kg Ca ha?1. From the results procured in this experiment, it was inferred that the application of poultry manure at 80 kg Ca ha?1 was found to be effective in improving the quality attributes of hybrid tomato as it imparts multiple essential nutrients along with calcium.
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    Physiological and morphological traits of Maize hybrids under saline water irrigation
    (NISCAIR-CSIR, India, 2019-03) Devi, B Nandhini; Chitdeshwari, T
    Salinity is one of the common abiotic stresses affecting crop growth and yield considerably. Hence, we conducted a pot culture experiment to evaluate the changes in various physiological and morphological traits of six maize hybrids (CO 6, CO 7, CO 8, CO 10, NK 6240 and 900 M Gold) under saline water irrigation. Saline water having a natural EC of 0.6, 3.2, 4.8, 6.7 and 8.9 dSm-1 was used for irrigating the crops up to 30 days. Nine seedling traits viz., shoot length, root length, shoot dry weight, root dry weight, total dry weight, photosynthetic rate, stomatal conductance, transpiration rate and chlorophyll content were measured. Based on the better physiological and morphological traits, dry matter productivity (DMP) and gas exchange parameters, the maize hybrids CO 6 and CO 7 have been identified as saline water tolerant up to an ECiw of 4.8 dSm-1. However, CO 8 was observed as salt sensitive as it recorded poor growth and photosynthetic parameters. Results suggest that DMP and gas exchange parameters would be useful traits for identifying salinity tolerance in maize hybrids at seedling stage.