Volume 10, Issue 21, January - June 2024

Selection of Glycine max (L.) merr accessions tolerant to Waterlogging

Okon G Okon¹, Abdelhak Rhouma^2♦, Abdulnabi Abdul Ameer Matrood³, Lobna Hajji-Hedfi², Joseph E Okon¹

¹Department of Botany, Faculty of Biological Sciences, Akwa Ibom State University, Ikot Akpaden, Nigeria
²Regional Centre of Agricultural Research of Sidi Bouzid, CRRA, Gafsa Road Km 6, B.P. 357, Sidi Bouzid 9100, Tunisia
³Department of Plant Protection, College of Agriculture, University of Basrah, Basrah 61004, Iraq

^♦Corresponding author
Regional Centre of Agricultural Research of Sidi Bouzid, CRRA, Gafsa Road Km 6, B.P. 357, Sidi Bouzid 9100, Tunisia

ABSTRACT

Waterlogging smothers soybean growth, choking roots and disrupting essential functions. Oxygen starvation, nutrient imbalance, and weakened defenses against disease leave plants stunted, chlorotic, and vulnerable. Yields plummet, seeds struggle to mature, and soil suffers long-term consequences, painting a grim picture for soybean crops submerged in persistent floodwaters. This study investigated the effects of waterlogging on five accessions of Glycine max (TGm-1, TGm-8, TGm-9, TGm-11, and TGm-12). Plant height, leaf area, total photosynthetic pigments (TPP), biomass yield, and root length were measured after 2, 3, and 4 weeks of waterlogging stress. TGm-9 exhibited superior performance across all parameters compared to other accessions and the control. It displayed the highest plant height (28.67 cm), leaf area (14.76 cm²), TPP content (44.83 mg/kg), biomass yield (1.73 g), and root length (30.17 cm). Despite some reductions in growth and physiology observed in all accessions under waterlogging, TGm-9 demonstrated remarkable resilience. This enhanced tolerance likely resulted from its robust development of adventitious root systems, a known adaptive response in G. max. These findings suggest that TGm-9 possesses superior waterlogging tolerance and has the potential for improved productivity in flood-prone environments. Further research could delve into the specific mechanisms underlying TGm-9's tolerance and explore its potential for breeding programs to develop waterlogging-resistant soybean cultivars.

Keywords: Biomass yield, Glycine max, Growth traits, Waterlogging stress

Discovery Agriculture, 2024, 10, e6da1552

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DOI: https://doi.org/10.54905/disssi.v10i21.e6da1552

Published: 09 February 2024