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July 11, 2016

thiourea use in agriculture

The decrease of nitrate due to an decrease in nitrate reductase activity observed in plants treated with high levels of thiourea may provoke changes in carbohydrate availability and the increase of amino acid level. The data reported are in agreement with similar results undertaken by Camire and Kubow (2009) and Lachman and Hamouz (2008). Ullrich CI., Novacky AJ. Orange flesh trait in potato: Inheritance and carotenoid content. (2006). Two cDNAs representing alleles of the nitrate reductase gene of potato (Solanum tuberosum L. cv. Concerning nitrates content, in the present study, plants are generally less sensitive to higher levels of thiourea since tubers treated with high level of thiourea accumulates less nitrates but the exact physiological mechanism of thiourea toxicity to plants is not known yet. 2001 ; Owen and Jones 2001). Zeaxanthin Has Enhanced Antioxidant Capacity with Respect to All Other Xanthophylls in Arabidopsis Leaves and Functions Independent of Binding to PSII Antennae . The yellowish filter cake was washed three times with 5 ml acetone until the cake acquired white colour. NO. (2006). Lu and G.-S. Zhou. The rest of tubers exceeded this everage, thus confirming the fact that tuber colour and carotenoids content are affected by the amount of thiourea applied on tuber mother. 2002). It is structurally similar to urea, except that the oxygen atom is replaced by a sulfur atom, but the properties of urea and thiourea differ significantly. Tuber content of antioxidant compounds is affected by genotype, agronomic factors, post-harvest storage, processing conditions, and environmental factors (Reddivari, Potato generally has greater amounts of vitamin C on a fresh mass (FM) basis than apple, carrot, cucumber, grape, lettuce, squash, sweet corn, and tomato (Novy, 2008). Anjum, F., A. Wahid, F. Javed and M. Arshad. Purification and characterization of polyphenol oxidase from nettle (Urtica dioica L.) and inhibitory effects of some chemicals on enzyme activity. (2005). Otherwise, the low levels of nitrate in plants treated with of thiourea are probably due to an decrease in nitrate reductase activity. Res. It is structurally similar to urea, except that the oxygen atom is replaced by a sulfur atom, but the properties of urea and thiourea differ significantly. This study is based on previous one, where thiourea improved yield and cholrophyll content of potato tubers (Mani 2012 ; Mani et al. 2008) and used in our tests, are farmyard manure (30 t.ha-1), triple super phosphate (P2O5 45% :150 kg.ha-1), and potassium sulphate (K2O 54% : 400 kg.ha-1), they were used as P and K sources respectively. All data of these parameters are analyzed by variance at 5% level using SAS program. grown for two consecutive years (1999 and 2000) under rainfed conditions of the Indian arid zone. Polyphenol and glycoalkaloid contents in potato cultivars grown in Luxembourg. Interactive effect of phosphorus, nitrogen and thiourea on cluster bean (Cyamopsis tetragonoloba L.) under rainfed conditions of the Indian arid zone. Advances in Potato Chemistry, Nutrition and Technology. Sci. Moreover, it is know that nitrate reductase activity increases after sucrose addition whilst the low sugar content (Harris et al. Effects of water stress on the protective enzyme activities and lipid peroxidation in roots and leaves of summer maize. 2007). This suggests that higher level of thiourea probably suppressed the water and minerals absorption by roots, thereby causing their deficiency within the plants and yellowing of leaves. It may act either as a nutritional supplement due to having nitrogen and sulfur or as biostimulator of cell growth; a role typical of plant bioregulator. Nova science Publishers, p : 29-74. Foyer CH., Ferrario-Méry S., Noctor G. (2001). Sondergaard TE., Schulz A., Palmgren MG. (2004). Differential change in root protein pattern of two wheat varieties under high and low nitrogen nutrition levels.Plant Sci, 168:81-87.

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