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GENOTYPIC VARIABILITY IN PHOTOSYNTHETIC PERFORMANCE AND GAS EXCHANGE INDEXES OF GUAVA CULTIVARS
B. SHIVA, A. NAGARAJA, M. SRIVASTAVA, A.K. GOSWAMI

Published in: International Journal of Agriculture Sciences
Volume- 9, Issue-43, pp.4689-4692, Sep 2017
DPI :-> 16.10077.IJAS.2017.V9I43.46894692.2021



Abstract
Photosynthesis is a central metabolic process in plants and photosynthetic traits can be used as indicators to judge the adaptability and resistance of plants. Besides the classical measurements of photosynthesis by gas exchange analysis, light harvesting pigment measurements have become a widely used method to study the functioning of the photosynthetic apparatus and are a powerful tool to study the plant’s response to environmental stress. In this study, the photosynthetic performance and gas exchange characteristics among 22 cultivars of Psidium guajava were investigated under hot arid conditions of India for identification of promising genotypes. Significant differences were noticed in the rate of photosynthesis (PN), stomatal conductance (gs), transpiration rate (E), internal CO2 concentration (Ci), water use efficiency (WUE) and light harvesting pigments. This study indicates that it could provide a useful target for breeding programs and will lead to more efficient use of guava cultivars with better adaptation to the limiting agro-climatic conditions of India.

Key-Words / Index Term
Photosynthesis, Water-use efficiency, Chlorophyll, Carotenoid content

How to cite this article
B. SHIVA, A. NAGARAJA, M. SRIVASTAVA, A.K. GOSWAMI , “GENOTYPIC VARIABILITY IN PHOTOSYNTHETIC PERFORMANCE AND GAS EXCHANGE INDEXES OF GUAVA CULTIVARS”, International Journal of Agriculture Sciences, 9, Issue-43, pp.4689-4692, Sep 2017. DPI:16.10077.IJAS.V9.I43.2021