Field Phenotyping of Soybean Roots for Drought Stress Tolerance

By Berhanu Amsalu Fenta, Steve Beebe, K. Kunert, J. Burridge, K. M. Barlow, J. Lynch, Christine H. Foyer. 2014

223 citations recorded by the source corpus.

Root architecture was determined together with shoot parameters under well watered and drought conditions in the field in three soybean cultivars (A5409RG, Jackson and Prima 2000). Morphology parameters were used to classify the cultivars into different root phenotypes that could be important in conferring drought tolerance traits. A5409RG is a drought-sensitive cultivar with a shallow root phenotype and a root angle of 60°. Prima 2000 is an intermediate drought-tolerant cultivar with a root angle of 40°–60°. It has an intermediate root phenotype. Prima 2000 was the best performing cultivar under drought stress, having the greatest shoot biomass and grain yield under limited water availability. It had abundant root nodules even under drought conditions. A positive correlation was observed between nodule size, above-ground biomass and seed yield under well-watered and drought conditions. These findings demonstrate that root system phenotyping using markers that are easy-to-apply under field conditions can be used to determine genotypic differences in drought tolerance in soybean. The strong association between root and nodule parameters and whole plant productivity demonstrates the potential application of simple root phenotypic markers in screening for drought tolerance in soybean.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/c97bc634b9d61a92a924a5f677bab12b3ee8d40c

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In Plant Science

1. D. Naylor
2. Devin Coleman-Derr
3. Xiying Zhang
4. Qin Fang
5. A. Wasaya
6. Zongzheng Yan

Citations in the corpus

• Drought Stress and Root-Associated Bacterial Communities (2018, background): “However, while lifestyle differences might partially explain the observed enrichment patterns, certain phyla that are predominantly Gram-negative or -positive are not universally copiotrophic or oligotrophic (Fierer et al., 2007), suggesting other factors likely also contribute.”
• Root Phenotyping for Drought Tolerance: A Review (2018, background): “Therefore, root phenotyping is important for crop breeding, although under field conditions, screening roots by phenotyping is a very difficult task [27].”