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ARS Home » Southeast Area » Stoneville, Mississippi » Crop Genetics Research » Research » Publications at this Location » Publication #418772
Research Project: Characterization and Introgression of Nematode Resistance into Upland Cotton

Location: Crop Genetics Research

Title: Resilience of soybean cultivars to waterlogging stress during reproductive stage

Author
item SANKARAPILLAI, LEKSHMY - Mississippi State University
item ADHIKARI, BIKASH - Mississippi State University
item Stetina, Salliana
item REDDY, K. RAJA - Mississippi State University
item BHEEMANAHALLI, RAJU - Mississippi State University

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 11/13/2024
Publication Date: 11/30/2024
Citation: Sankarapillai, L.V., Adhikari, B., Stetina, S.R., Reddy, K., Bheemanahalli, R. 2024. Resilience of soybean cultivars to waterlogging stress during reproductive stage. Meeting Abstract. https://scisoc.confex.com/scisoc/2024am/meetingapp.cgi/Paper/158336.

Interpretive Summary:

Technical Abstract: Waterlogging (WL) is the second leading cause of significant crop yield reductions, including soybeans. Geospatial analyses indicate that certain areas in the mid-southern U.S. receive above-average precipitation. Higher precipitation and poor drainage during crop-growing seasons hamper soybean yield potential. This study aims to understand soybean genotypes' genetic variability in tolerance and recovery response to waterlogging (WL) during reproductive stages. Seventeen soybean genotypes grown under non-stress conditions were exposed to WL stress (3-4 cm) at full bloom (R2) for 14 d. Several types of physiological and pigment data were collected during WL (14 d of stress) and after WL (14 d after recovery). Fourteen days of WL at the reproductive stage decreased the photosynthetic rate by 38% and chlorophyll index by 42%. This saturation reduced transpiration and photosystem II quantum efficiency (35%) across the genotypes compared to the control. During recovery, chlorophyll and photosynthesis rates were significantly lower (10%) than the control. Moreover, canopy temperature increased by approximately 2 C under WL and did not return to normal even after recovery. Waterlogging during flowering and early seed filling led to a 38% reduction in seed yield, primarily due to a 20% decrease in pod number and a 23% reduction in seeds per plant. Waterlogging-induced imbalance in physiology also reduced seed protein by 3.9% compared to the control, while the oil and its subcomponents did not differ between treatments. Identified WL-tolerant genotypes with higher recovery rates could serve as promising trait donors for breeding reproductive stage resilient genotypes suitable for waterlogging-prone areas.