biologia plantarum

International journal on Plant Life established by Bohumil Nìmec in 1959

Biologia plantarum 42:615-620, 1999 | DOI: 10.1023/A:1002695905549

Some Physiological Characteristics in Resistant and Susceptible Cotton Cultivars Infected with Cotton Leaf Curl Virus

M. Ashraf1, Z.U. Zafar1
1 Institute of Pure and Applied Biology, Bahauddin Zakariya University, Multan, Pakistan

Eight cultivars/lines of Gossypium hirsutum (CIM-443, CIM-448, CIM-1100, FH-634, S-111, S-113, Cedix, and LRA 5166) resistant to cotton leaf curl virus (CLCuV), one moderately-resistant (cv. NIAB-Krishma), and one susceptible (cv. S-12) were used. All the resistant lines remained free of all disease symptoms, whereas in moderately-resistant and susceptible cvs. leaf curling and vein thickening occurred. Cultivars with varying degree of CLCuV-resistance had different pattern of accumulation of macronutrients. Leaf N content was lowest in S-12, but increased considerably due to disease. Leaf K and Ca contents of S-12 were lower in the diseased leaves than in healthy ones. Chlorophyll a and b contents were highest in lines S-111, S-113 and S-12. A marked reduction in chlorophyll b content was observed in the diseased leaves of S-12. Leaf water potential in S-12 and NIAB-Krishma was also decreased due to disease. The most distinctive characteristic to differentiate between lines was epicuticular wax content, since all the resistant lines had considerably higher wax content on their leaf surfaces than the moderately-resistant or susceptible cultivars.

Keywords: chlorophyll content; epicuticular wax content; Gossypium hirsutum; macronutrients; soluble proteins
Subjects: chlorophyll, cotton leaf curl virus; cotton, resistant and susceptible cultivars to leaf curl virus; epicuticular wax, cotton leaf curl virus; Gossypium hirsutum; virus, cotton leaf curl, resistant and susceptible cultivars; water potential, leaf, cotton leaf curl virus

Published: December 1, 1999  Show citation

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Ashraf, M., & Zafar, Z.U. (1999). Some Physiological Characteristics in Resistant and Susceptible Cotton Cultivars Infected with Cotton Leaf Curl Virus. Biologia plantarum, 42(4), 615-620. doi: 10.1023/A:1002695905549
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