Responses of the cotton plant to variations in the intensities of natural light
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Instituto Interamericano de Cooperación para la Agricultura (IICA)
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Two cotton genotypes (Gossypium hirsutum L.), 'MCU-S' and 'PRS-72', were subjected to variations in full sunlight hours. In both varieties, three hours of daily sunlight delayed bud initiation and reduced growth and yield, but the six-hour treatment increased dry weight and seed cotton yield in 'PRS-72'. A similar increase in growth and yield in 'PRS-72' occurred when three or six hours of sunlight until bud formation was followed by normal sunlight, while in 'MCU-5' these treatments increased leaf weight and yield, respectively. A reduction to three hours of sunlight after flowering adversely affected the growth and yield of both varieties. The sunlight treatments differentially influenced the chlorophyll contents of these varieties. Since 'PRS-72' reacted comparatively more favorably to reduced sunlight hours during the vegetative phase, it may be well suited to rainy conditions in the cotton-growing areas of western and central India.
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Gossypium hirsutum||Gossypium hirsutum||Gossypium hirsutum||Gossypium hirsutum, Genotipo||genotypes||genótipo||génotype, Luz||light||luz||lumière, Crecimiento||growth||crescimento||croissance, Rendimiento de cultivos||crop yield||rendimento de cultura||rendement des cultures, Clorofila a||chlorophyll a||undefined||chlorophylle a, India||India||Índia||Inde, Sede Central