Combined Drought and Heat Stress Influences the Root Water Relation and Determine the Dry Root Rot Disease Development Under Field Conditions: A Study Using Contrasting Chickpea Genotypes

Frontiers in Plant Science

Chandra Obul Reddy Puli¹  Basavaiah Mohan-Raju²  Venkategowda Ramegowda²  Krishnappa Rangappa³  M. Nagaraj Kumar⁴  Basavanagouda S. Patil⁵  Vadivelmurugan Irulappan⁶  Aswin Reddy Chilakala⁶  Komal Vitthalrao Mali⁶  Muthappa Senthil-Kumar⁶  Prachi Pandey⁶ 

[1] Department of Botany, Yogi Vemana University, Kadapa, India;Department of Crop Physiology, College of Agriculture, University of Agricultural Sciences, Bengaluru, India;Division of Crop Sciences, ICAR Research Complex for North Eastern Hill Region, Meghalaya, India;Division of Plant Physiology, ICAR-Indian Agricultural Research Institute, New Delhi, India;ICAR-Indian Agricultural Research Institute (IARI), Regional Research Center, Dharwad, India;National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, India;

关键词: Macrophomina phaseolina;    Cicer arietinum;    plant water status;    drought;    heat;    combined stress;   

DOI  :  10.3389/fpls.2022.890551

来源: DOAJ

【 摘 要 】

Abiotic stressors such as drought and heat predispose chickpea plants to pathogens of key importance leading to significant crop loss under field conditions. In this study, we have investigated the influence of drought and high temperature on the incidence and severity of dry root rot disease (caused by Macrophomina phaseolina) in chickpea, under extensive on- and off-season field trials and greenhouse conditions. We explored the association between drought tolerance and dry root rot resistance in two chickpea genotypes, ICC 4958 and JG 62, with contrasting resistance to dry root rot. In addition, we extensively analyzed various patho-morphological and root architecture traits altered by combined stresses under field and greenhouse conditions in these genotypes. We further observed the role of edaphic factors in dry root rot incidence under field conditions. Altogether, our results suggest a strong negative correlation between the plant water relations and dry root rot severity in chickpeas, indicating an association between drought tolerance and dry root rot resistance. Additionally, the significant role of heat stress in altering the dynamics of dry root rot and the importance of combinatorial screening of chickpea germplasm for dry root rot resistance, drought, and heat stress have been revealed.

【 授权许可】

Unknown