Physiological characteristics of two Capsicum annuum L. varieties exposed to different frequency of watering application
2007
Mahani, A.H. | Hawa, Z.J. | Mohd. F.R., University Putra Malaysia 43400, Serdang, Selangor (Malaysia). Dept. of Crop Science | Siti, A.H.
Water is the most important component for plant growth and photosynthesis for biomass production. This requirement depends on variety, growth stage, watering duration and growing season. When crops are supplied with water steadily throughout the season but at an inadequate rate for normal growth, water stress develops. Plant growth and organ development becomes retarded early in the season, thus affecting total growth performance and yield. Cultivation of Capsicum annuum L. under controlled environment system, still faces some effect from instantaneous micro-environment fluctuations, especially water deficit stress. Therefore, a study was conducted under rainshelter to examine the physiological responses of two varieties of C. annuum L., Kulai and hot chilli, exposed to three water applications frequency i.e. 4 times/day, 6 times/day and 8 times/day. Six treatments combination were subjected to a split-plot-randomized complete block design, replicated three times. Physiological data collected were subjected to analysis of variance and turkey's test. Relative chlorophyll contents, net photosynthesis, light response curve, apparent quantum yield, photochemical efficiency of PS2, photosystem 2 efficiency and water use efficiency were determined. Relative chlorophyll values were significantly different between varieties recorded at every growth stage. The paper further discusses the physiological characteristics of the two varieties C. annuum L. throughout the developmental stages using different watering management.
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