Genetic improvement of legume roots for adaption to acid soils

Li, Xinxin; Zhang, Xinghua; Zhao, Qingsong; Liao, Hong

doi:10.1016/j.cj.2023.04.002

Cited by 10 publications

(4 citation statements)

References 147 publications

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“…Similarly, the closest homolog in soybean is Glyma.10G018800 , with 90.26% identity and an e-value of 0.0 from pairwise BLAST of the coding sequence. Interestingly, Glyma.10G018800 shows elevated expression in the root (https://phytozome-next.jgi.doe.gov/report/transcript/Gmax_Wm82_a4_v1/Glyma.10G018800.1) and has been identified as a candidate gene controlling root growth [41], [42], potentially resulting from divergent evolution.…”

Section: Discussionmentioning

confidence: 99%

Identification of candidate genes controlling red seed coat color in cowpea (Vigna unguiculata[L.] Walp)

Herniter,

Muñoz-Amatriaín,

et al. 2024

Preprint

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Seed coat color is an important consumer-related train in cowpea (Vigna unguiculata[L.] Walp.) and has been a subject of study for over a century. Utilizing newly available resources, including mapping populations, a high-density genotyping platform, and several genome assemblies, red seed coat color has been mapped to two loci,Red-1(R-1) andRed-2(R-2), on Vu03 and Vu07, respectively. A gene model (Vigun03g118700) encoding a dihydroflavonol 4-reductase, a homolog of anthocyanidin reductase 1, which catalyzes the biosynthesis of epicatechin from cyanidin, has been identified as a candidate gene forR-1. Possible causative variants have been also identified forVigun03g118700. A gene model on Vu07 (Vigun07g118500), with predicted nucleolar function and high relative expression in the developing seed, has been identified as a candidate forR-2. The observed red color is believed to be the result of a buildup of cyanidins in the seed coat.

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Section: Discussionmentioning

confidence: 99%

Identification of candidate genes controlling red seed coat color in cowpea (Vigna unguiculata[L.] Walp)

Herniter,

Muñoz-Amatriaín,

et al. 2024

Preprint

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“…Neutral pH is more favourable, supporting optimal nutrient availability, plant growth, and microbial N‐fixation (O'Callaghan et al., 2022 ). However, certain acid‐tolerant rhizobia may still establish symbiotic relationships with plants under acidic conditions (Ferguson et al., 2019 ), and some legume crops exhibit resistance to acidic soil, enabling them to tolerate and thrive in such environments (Li et al., 2023 ).…”

Section: Discussionmentioning

confidence: 99%

Determination of abundance and symbiotic effectiveness of native rhizobia nodulating soybean and other legumes in Rwanda

Nzeyimana,

Onwonga,

Ayuke

et al. 2024

Plant Enviro Interactions

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Rhizobia diversity in the rhizosphere is one of the key promoters of biological nitrogen fixation between host legumes and microsymbionts, although related complex interaction may depend on various factors. This research was intended to assess the abundance of indigenous rhizobia isolates under various soil conditions, as well as their effectiveness to nodulate legumes such as soybeans. Factors such as soil properties and legume species influence the volume and symbiotic effectiveness of native rhizobia to nodulate crop legumes. To investigate the abundance of rhizobia isolates, legume crops were uprooted to obtain nodules for most probable number (MPN) determination of rhizobia isolates, and soybean (Glycine max.) was used to verify the presence of suitable and efficient rhizobia strains for nitrogen fixation. Soil samples were obtained from the holes out of which nodules were collected, and the laboratory analysis included pH, Mg, K, available P, organic C, Ca, and N to establish the correlation between the soil status and number of rhizobia isolates' cells. Significant variations (p‐value <.05) were observed in the cell counts of Rhizobia isolates from Glycine max, Phaseolus vulgaris, Pisum sativum, and Vigna unguiculata, particularly when compared to Arachis hypogaea isolates under acidic conditions. Notably, Pisum sativum and Vigna unguiculata showed consistent performance across all pH conditions. The number of rhizobia isolates was found to be significantly linked to total N and P deficiencies (p < .05). It was also established that total N was dependent on the number of rhizobia cells and that there is a strong correlation between organic carbon and N content. This study highlights the crucial role of understanding and optimizing conditions for rhizobia nodulation in diverse soil environments, emphasizing its potential impact on enhancing biological nitrogen fixation in legumes.

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“…Quinate, an organic acid, plays diverse roles, including pH regulation, metal chelation, antioxidant defense, and contributing to carbon allocation strategies in response to challenging nutrient conditions (Carrington et al, 2021). Citrate, a tricarboxylic acid, supports phosphorus solubilization, enhances phosphorus acquisition through root exudation, acidifies the rhizosphere, affects nutrient interactions, and participates in oxidative stress defense (Li et al, 2023; Khan et al, 2023; Roychowdhury et al, 2023). Adenosine monophosphate (AMP) serves as an energy storage molecule, a signaling molecule triggering stress responses, and contributes to metabolic adjustments, promoting adaptability to low phosphorus stress (Min et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

Phosphorus deficiency alters root length, acid phosphatase activity, organic acids, and metabolites in root exudates of soybean cultivars

Tantriani,

Cheng,

Oikawa

et al. 2023

Physiologia Plantarum

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Phosphorus (P) deficiency alters the root morphological and physiological traits of plants. This study investigates how soybean cultivars with varying low‐P tolerance values respond to different P levels in hydroponic culture by assessing alterations in root length, acid phosphatase activity, organic acid exudation, and metabolites in root exudates. Three low‐P‐tolerant cultivars (‘Maetsue,’ ‘Kurotome,’ and ‘Fukuyutaka’) and three low‐P‐sensitive cultivars (‘Ihhon,’ ‘Chizuka,’ and ‘Komuta’) were grown under 0 (P0) and 258 μM P (P8) for 7 and 14 days after transplantation (DAT). Low‐P‐tolerant cultivars increased root length by 31% and 119%, which was lower than the 62% and 144% increases in sensitive cultivars under P0 compared to P8 at 7 and 14 DAT, respectively. Acid phosphatase activity in low‐P‐tolerant cultivars exceeded that in sensitive cultivars by 5.2‐fold and 2.0‐fold at 7 and 14 DAT. Root exudates from each cultivar revealed 177 metabolites, with higher organic acid exudation in low‐P‐tolerant than sensitive cultivars under P0. Low‐P‐tolerant cultivars increased concentrations of specific metabolites (oxalate, GABA, quinate, citrate, AMP, 4‐pyridoxate, and CMP), distinguishing them from low‐P‐sensitive cultivars under P0. The top five metabolomic pathways (purine metabolism, arginine and proline metabolism, TCA cycle, glyoxylate and dicarboxylate metabolism, alanine, aspartate, and glutamate metabolism) were more pronounced in low‐P‐tolerant cultivars at 14 DAT. These findings indicate that increasing root length was not an adaptation strategy under P deficiency; instead, tolerant cultivars exhibit enhanced root physiological traits, including increased acid phosphatase activity, organic acid exudation, specific metabolite release, and accelerated metabolic pathways under P deficiency.

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Genetic improvement of legume roots for adaption to acid soils

Cited by 10 publications

References 147 publications

Identification of candidate genes controlling red seed coat color in cowpea (Vigna unguiculata[L.] Walp)

Identification of candidate genes controlling red seed coat color in cowpea (Vigna unguiculata[L.] Walp)

Determination of abundance and symbiotic effectiveness of native rhizobia nodulating soybean and other legumes in Rwanda

Phosphorus deficiency alters root length, acid phosphatase activity, organic acids, and metabolites in root exudates of soybean cultivars

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