EFFECT OF HEAT STRESS ON THE PHYSIOLOGICAL TRAITS AND YIELD OF BLACK GRAM

R. DIVYAPRASANTH¹, S.P. RAMANATHAN²*, P. JEYAKUMAR³, S. KOKILAVANI^4
1Agro Climate Research Centre, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
²Professor and Head, Agro Climate Research Centre, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
³Professor and Head, Department of Crop Physiology, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
⁴Agro Climate Research Centre, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
* Corresponding Author : ramanathan.sp@tnau.ac.in

Received : 03-09-2020     Accepted : 25-09-2020     Published : 30-09-2020
Volume : 12     Issue : 18       Pages : 10207 - 10210
Int J Agr Sci 12.18 (2020):10207-10210

Keywords : Heat stress, Black gram, Physiological traits, Yield loss
Academic Editor : Dr Lal Ahmed Mohammed, Dr S. Manickam, P. K. Suryawanshi
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Agro Climate Research Centre, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India.
Author Contribution : All authors equally contributed

The rise in global temperature leading to heat stress conditions on plant is a significant concern in future. It will affect the average plant physiological process that results in declining yield and productivity. To study the effect of heat stress on physiological and yield traits of black gram, a pot culture experiment was conducted at the Agro Climate Research Centre of TNAU, Coimbatore during 2019-20. The experimental results revealed that the heat stress reduced the membrane stability index (MSI) of black gram plant from 78.19 percent to 70.52 percent when compared to ambient condition. Likewise, the chlorophyll content in the plants subjected to heat stress was reduced to 36.74 percent as against 41.52 percent recorded under ambient condition. The deterioration in the normal physiological process reduced the average yield under the elevated condition (Ambient+2 ?C) to 2.28 grams per plant as compared to 2.98 grams per plant in ambient condition.

1. Vagheera P., Vanaja M., Satyavathi P., Vijay Kumar G., Sathish P. and Khan I. (2017) Int J Curr Sci, 20(3), E 49-56.
2. Mirza H., Nahar K., Md. Alam, Roychowdhury R. and Fujita M. (2013) International Journal of Molecular Sciences, 14 (5), 9643-84.
3. Hatfield J.L. and Prueger J.H. (2015) Weather and Climate Extremes, 10, 4-10.
4. Fahad S., Bajwa A.A., Nazir U., Anjum S.A., Farooq A., Zohaib A., Sadia S., Nasim W., Adkins S., Saud S., Ihsan M.Z., Alharby H., Wu C., Wang D. and Huang J. (2017) Front. Plant Sci., 8, 1147.
5. Basu P.S., Singh U., Kumar A., Praharaj C.S. and Shivran R.K. (2016) Indian Journal of Agronomy, 61.
6. Araújo, Susana S., Steve Beebe, Martin Crespi, Bruno Delbreil, Esther M. González, Veronique Gruber, Isabelle Lejeune-Henaut, et al. (2015) Critical Reviews in Plant Sciences, 34, 237-80.
7. Muhammad Javid Iqbal (2018) In Global Wheat Production. InTech, 51-65.
8. Das K. and Roychoudhury A. (2014) Front. Environ. Sci., 2, 53.
9. Niu Y. and Xiang Y. (2018) Front. Plant Sci., 9, 915.
10. Sai, Cayalvizhi B. and Parameswaran Chidambaranathan (2019) Plant Physiology Reports, 24 (3), 399-409.
11. Mathur S., Agrawal D. and Jajoo A. (2014) Journal of Photochemistry and Photobiology B: Biology, 137, 116-26.
12. Chinmayee M., Chand R., Tiwari J.K. and Singh A.K. (2020) Physiology and Molecular Biology of Plants, 26 (6), 1119-25.
13. Devasirvatham V., Gaur P.M., Raju T.N., Trethowan R. M. and Tan D. K.Y. (2015) Field Crops Research, 172, 59-71.