Elevated CO2 ameliorate the negative effects of high temperature on groundnut (Arachis hypogaea)- Studies under free-air temperature elevation

Authors

  • M. Vanaja ICAR-Central Research Institute for Dryland Agriculture, Santosh Nagar, Hyderabad-500059, India.
  • P. Sathish ICAR-Central Research Institute for Dryland Agriculture, Santosh Nagar, Hyderabad-500059, India.
  • N. Jyothi Lakshmi ICAR-Central Research Institute for Dryland Agriculture, Santosh Nagar, Hyderabad-500059, India.
  • G. Vijay Kumar Department of Genetics, Osmania University, Hyderabad 500007
  • P. Vagheera ICAR-Central Research Institute for Dryland Agriculture, Santosh Nagar, Hyderabad-500059, India.
  • Ch. Mohan ICAR-Central Research Institute for Dryland Agriculture, Santosh Nagar, Hyderabad-500059, India.
  • S.K. Yadav ICAR-Central Research Institute for Dryland Agriculture, Santosh Nagar, Hyderabad-500059, India.
  • B. Sarkar ICAR-Central Research Institute for Dryland Agriculture, Santosh Nagar, Hyderabad-500059, India.
  • M. Maheswari ICAR-Central Research Institute for Dryland Agriculture, Santosh Nagar, Hyderabad-500059, India.
  • K. SAMMI REDDY ICAR-Central Research Institute for Dryland Agriculture, Santosh Nagar, Hyderabad-500059, India.

DOI:

https://doi.org/10.54386/jam.v21i4.275

Keywords:

elevated CO2, temperature stress,, photosynthesis rate,, transpiration, water use efficiency, Biomass production

Abstract

Four groundnut (Arachis hypogaea L.) genotypes- Narayani, Dharani, K-6 and K-9 were assessed for growth and yield responses at elevated temperature of 3.0 ± 0.5°C above ambient canopy temperature (eT) and its interaction with elevated CO of 550 ± 50ppm (eT+eCO ) under Free Air 2 2 Temperature Elevation (FATE) facility. The study revealed that eT significantly decreased photosynthetic rate (A ) of all groundnut genotypes whereas eT+eCO condition ameliorated the ill effects of eT. The net 2 impact of eT on A was higher than transpiration rate (Tr) and this reflected in decreased WUE with all net genotypes. WUE improved significantly at eT+eCO with increased A and decreased Tr. Increase in 2 net canopy temperature (eT) resulted decreased relative water content (RWC), cell membrane stability and increased osmotic potential, Malondialdehyde (MDA) content and accumulation of proline. Elevated CO 2 along with eT (eT+eCO ) facilitated these parameters to recover to that of ambient controls, revealing the 2 ameliorative effect of eCO . Similar responses were recorded for biomass and yield parameters. Among 2 the selected groundnut genotypes, superior performance for seed yield at high temperature of >40°C by K-9 was due to ability to maintain better reproductive capacity and Dharani was responsive to elevated CO even at high temperature, indicating the genotypic variability.

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Published

01-12-2019

How to Cite

M. Vanaja, P. Sathish, N. Jyothi Lakshmi, G. Vijay Kumar, P. Vagheera, Ch. Mohan, S.K. Yadav, B. Sarkar, M. Maheswari, & K. SAMMI REDDY. (2019). Elevated CO2 ameliorate the negative effects of high temperature on groundnut (Arachis hypogaea)- Studies under free-air temperature elevation. Journal of Agrometeorology, 21(4), 411–419. https://doi.org/10.54386/jam.v21i4.275

Issue

Vol. 21 No. 4 (2019): December

Section

Research Paper

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