ISSN : 0975-3710
EISSN : 0975-9107
B. SHIVA1*, A. NAGARAJA2, M. SRIVASTAVA3, A.K. GOSWAMI4
1Division of Fruits and Horticultural Technology, ICAR-Indian Agricultural Research Institute, New Delhi, 110 012, India
2Division of Fruits and Horticultural Technology, ICAR-Indian Agricultural Research Institute, New Delhi, 110 012, India
3Division of Fruits and Horticultural Technology, ICAR-Indian Agricultural Research Institute, New Delhi, 110 012, India
4Division of Fruits and Horticultural Technology, ICAR-Indian Agricultural Research Institute, New Delhi, 110 012, India
* Corresponding Author : banothshivaiari@gmail.com
Received : 01-09-2017 Accepted : 16-09-2017 Published : 18-09-2017
Volume : 9 Issue : 43 Pages : 4689 - 4692
Int J Agr Sci 9.43 (2017):4689-4692
Keywords : Photosynthesis, Water-use efficiency, Chlorophyll, Carotenoid content
Academic Editor : Vanitha S
Conflict of Interest : None declared
Acknowledgements/Funding : I express my sincere thanks to the Head, Division of Fruits and Horticultural Technology, ICAR- IARI, New Delhi, for providing me support and technical guidance in all course of my field and lab work
Author Contribution : All author equally contributed
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.
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