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REDUCING DISEASE INCIDENCE OF COTTON LEAF CURL VIRUS (CLCUV) IN COTTON (GOSSYPIUM HIRSUTUM L.) BY POTASSIUM SUPPLEMENTATION

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dc.contributor.author ZAFAR ULLAH ZAFAR
dc.contributor.author HABIB-UR-REHMAN ATHAR
dc.date.accessioned 2023-01-04T09:37:44Z
dc.date.available 2023-01-04T09:37:44Z
dc.date.issued 2013-07-17
dc.identifier.citation Zafar, Z. U., & Athar, H. U. R. (2013). Reducing disease incidence of cotton leaf curl virus (clcuv) in cotton (Gossypium hirsutum L.) by potassium supplementation. Pak. J. Bot, 45(3), 1029-1038. en_US
dc.identifier.issn 2070-3368
dc.identifier.uri http://142.54.178.187:9060/xmlui/handle/123456789/15521
dc.description.abstract Severity of various diseases in plants can be reduced by nutrient management. The knowledge of K nutrition on relationship between plants and pests may help in devising strategies to set up high yielding production system by reducing disease incidence. Therefore, two cotton (Gossypium hirsutum L.) cultivars, S-12 (CLCuV-susceptible) and CIM-448 (CLCuV-resistant) were supplied with varying concentration of potassium [40, 120, and 236 mg K L-1]. During the experiment, only virus susceptible cultivar S-12 exhibited typical disease symptoms on leaves, while that of CIM-448 did not show any degree of disease incidence. Moreover, at lower K supply, severity of disease incidence significantly enhanced. Although growth of both cotton cultivars decreased at low K concentration, cv. CIM-448 was superior in growth than that of virus susceptible cv. S-12 at all K concentrations. Virus resistant cultivar, cv. CIM-448 had higher leaf epicuticular wax than that of cv. S-12. However, it is interesting to note that diseased leaves of cv. S-12 had greater epicuticular wax content than that of healthy leaves of cv. S-12. Leaf K+ decreased with decrease in K regimes in both cultivars. Diseased leaves of virus susceptible cv. S-12 had higher leaf Ca2+ and N than those in healthy leaves of cvs. S-12 and CIM-448, whereas CIM-448 had higher leaf Mg2+ as compared to diseased or healthy leaves of S-12. Total soluble proteins, total free amino acids, total soluble sugars did not show any relationship with disease incidence. Photosynthetic rate and stomatal conductance were higher in CIM-448 than that in cv. S-12. Moreover, photosynthetic rate was higher in healthy leaves of cv. S-12 than that of diseased leaves. Chlorophyll ‘a’ was higher in cv. CIM-448 than that in the leaves of cv.S12. In conclusion, low supply of K decreased the growth of both cultivars, but it also increased the severity of disease incidence in cv. S-12. Increase in disease incidence in cv. S-12 is possibly associated with lower photosynthetic pigments, lower rates of photosynthesis, and lower K and N use efficiency and low accumulation of Mg2+in the leaves. en_US
dc.language.iso en en_US
dc.publisher Karachi: Pakistan Botanical Society en_US
dc.title REDUCING DISEASE INCIDENCE OF COTTON LEAF CURL VIRUS (CLCUV) IN COTTON (GOSSYPIUM HIRSUTUM L.) BY POTASSIUM SUPPLEMENTATION en_US
dc.type Article en_US


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