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A Novel Approach to Increase South Asian Legume Resilience and Productivity Under Waterlogging Stress Utilizing Rhizobium Inoculation

JSHS · 2025

Riya Kalluvila, Dr. Ramakrishnan M. Nair · Hartford Union High School, Hartford, WI

Overview

Mungbean (Vigna radiata) and urdbean (Vigna mungo) are two staple protein-rich legumes grown predominantly in Asia. India is the major producer (3.17 million t) of mungbean from an area of 5.5 million hectares (ha). In parallel, urdbean (black gram) is a vital legume in India, where its production reaches 2.78 million tons from an area of 4.63 million ha. Mungbean and urdbean have the ability to fix atmospheric nitrogen through symbiosis wit h rhizobial bacteria (symbiotic microorganisms that form nodules on the roots of legumes). This nitrogen fixation process is essential for soil fertility and reducing the need for synthetic nitrogen fertilizers. Oxygen deprivation (root damage) caused by waterlogging is a major environmental problem for mungbean and urdbean growth. Waterlogging is an adverse abiotic stress and is becoming more frequent in semi-arid tropics, specifically, Hyderabad, India where the 22.13% rise in unseasonal rainfall is linked to climat e change and damage to legume plants. The interplay between waterlogging stress and rhizobium inoculation has critical implications for crop resilience and productivity. This leguminous research study coherently investigates the effects of rhizobium in legume plant growth traits under various stage conditions, including the flowering stage and pre - flowering stage, and assesses the impact of rhizobium inoculation under control and water - logging treatments. As primary hypothesis, rhizobium inoculation will enhance the resilience and productivity of legumes under waterlogging stress. Waterlogging treatment had a significant effect on both mungbean and urdbean genotypes. Root nodulation and total biomass were significantly increased under rhizobium inoculation.

Competition history

  • JSHS 2025 Category not listed

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