Positive correlation between the number of root nodule primordia and seed sugar secretion in soybean (<i>Glycine max</i>L.) seedlings inoculated with a low density of<i>Bradyrhizobium japonicum</i>

Iizuka, Miyuki; Arima, Yuzo; Yokoyama, Tadashi; Watanabe, Kayo

doi:10.1080/00380768.2002.10409194

Cited by 7 publications

(7 citation statements)

References 25 publications

(14 reference statements)

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“…Iizuka et al (2002) observed similar results in the relationship between Bradyrhizobium and soybean (Glycine max L.) cultivars. On the other hand, adverse effects of seed exudates on Rhizobium proliferation have been reported.…”

supporting

confidence: 71%

“…Previously, we reported that the seed exudates of common bean (Phaseolus vulgaris L.) were rich in nutrients, and that Rhizobium proliferation remarkably increased in the medium composed of seed exudates plus soil extract and in the aseptic spermosphere with an artificial vermiculite bed . Iizuka et al (2002) observed similar results in the relationship between Bradyrhizobium and soybean (Glycine max L.) cultivars. On the other hand, adverse effects of seed exudates on Rhizobium proliferation have been reported.…”

supporting

confidence: 65%

“…These results suggested that the beneficial effect of SE on Rhizohium proliferation was mainly dependent on the substances in the HP fraction. Iizuka et al (2002) also showed that the potential of seed exudates of soybean (Glycine mux L.) for Brudyrhizobium proliferation was detected in the HP fraction. In several reports, it was indicated that the flavonoid compounds inducing the nod gene expression affected rhizobial proliferation.…”

Section: Resultsmentioning

confidence: 97%

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RhizobiumProliferation-Supporting Substances in Seed Exudates of Common Bean (Phaseolus vulgarisL.)

Kato

Watanabe

Arima

2005

Soil Science and Plant Nutrition

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Seed exudates collected from three cultivars (cv. Hokkaikintoki, Himetebou, and Kurodane‐kinugasa) of common bean (Phaseolus vulgaris L.) were fractionated based on several physicochemical properties, and the nutrient substances in the fractions effective for Rhizobium proliferation were determined. Regardless of the common bean cultivars, the low molecular weight and high polarity fraction showed the most beneficial effect on Rhizobium proliferation. After further separation of the low molecular weight and high polarity fraction, the promoting effect was detected in the non‐ionic and the cationic plus ampho‐teric subtractions. Although the amount of sugars or amino acids exuded from a seed was, respectively, similar in all the cultivars except for the sugars in Kurodanekinugasa, the content of these compounds per seed‐weight was inversely proportional to the seed size. Ten sugars and twenty‐one amino acids were, respectively, identified in the non‐ionic and cat‐ionic plus amphoteric subtractions, and there were some differences in the composition of these substances between common bean cultivars.

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supporting

confidence: 71%

supporting

confidence: 65%

Section: Resultsmentioning

confidence: 97%

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RhizobiumProliferation-Supporting Substances in Seed Exudates of Common Bean (Phaseolus vulgarisL.)

Kato

Watanabe

Arima

2005

Soil Science and Plant Nutrition

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“…In the present paper, we demonstrated that Rhizobium inoculated around the periphery of sowed common bean seeds were able to proliferate under the existence of indigenous microbes in all combinations of two strains of Rhizobium , three cultivars of common bean and three types of Japanese soil. The increase in the population around the periphery of pre‐rooting common bean seeds is considered to be advantageous for inoculated Rhizobium to enhance the inoculation frequency to the primary root emerging from the seed surface because the increase in the rhizobial population is related to the increase in the infection possibility (Iizuka et al . 2002; Weaver and Frederick 1974ab).…”

Section: Resultsmentioning

confidence: 99%

Proliferation of inoculatedRhizobiumand indigenous microbes around the periphery of pre-rooting common beanPhaseolus vulgarisL. seeds sown in non-sterile soils

Kato

Hirata

Sekimoto

et al. 2007

Soil Science and Plant Nutrition

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The proliferation of inoculated gusA-marked (encoding β-glucuronidase) Rhizobium and indigenous microbes around the periphery of common bean (Phaseolus vulgaris L. cv. Hokkaikintoki, Himetebou and Kurodanekinugasa) seeds sown in non-sterile Japanese soils (Andosol, Gray Lowland soil and Sandy Regosol) were investigated. The number of gusA-marked Rhizobium cells inoculated increased 24 h after sowing. The population of gusA-marked Rhizobium and indigenous bacteria tended to be smaller around seeds of Hokkaikintoki compared with the other cultivars. The population of gusA-marked Rhizobium and indigenous bacteria also tended to be smaller in Andosol than in the other soils. The proliferative response of indigenous fungi was weaker than that of gusA-marked Rhizobium or indigenous bacteria. These results indicated that Rhizobium inoculated around the periphery of common bean seeds could proliferate efficiently under the existence of indigenous microbes and that the intensity of proliferation was influenced by the type of common bean cultivar and soil type.

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“…Drought is a threat to soybean production worldwide, and soybean roots and nodules are important indicators of drought [ 27 ]. Enrei is a Japanese germplasm well documented for its high-nodulating efficiency [ 28 , 29 ]. The measurement of root nodules using Winrhizo software had a poor accuracy, so prior results were analyzed by applying machine learning [ 30 ].…”

Section: Discussionmentioning

confidence: 99%

High-Throughput Phenotypic Characterization and Diversity Analysis of Soybean Roots (Glycine max L.)

Kim

Subramanian

Hahn

et al. 2022

Plants

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Soybean (Glycine max L.) is a crop native to Northeast Asia, including China, Korea, and Japan, but currently cultivated all over the world. The National Agrobiodiversity Center in Korea at the Rural Development Administration (RDA) conserves approximately 26,000 accessions and conducts characterizations of its accessions, to accumulate new information. Roots are essential organs of a plant, providing mechanical support, as well as aiding water and nutrient acquisition. Currently, not much information is available in international gene banks regarding root characterization. We studied the root phenotype of 374 soybean accessions, using a high-throughput method. Eight root morphological traits (RMT) were studied and we observed that the surface area (SA), number of forks (NF), and number of tips (NT) had a positive correlation with total length (LENGTH), and that link average length (LAL) and other traits all had a negative correlation. Additionally, the correlation between seed traits (height, width, and 100-seed weight) and root traits was confirmed for the first time in this experiment. The germplasms were divided into three clusters by k-means clustering, and orthogonal projections to latent structures discriminant analysis (OPLS-DA) was used to compare clusters. The most distinctive characteristics between clusters were total lateral average length (LAD) and total lateral average length (DIAM). Cluster 3 had the highest LENGTH, SA, NF, and NF, whereas cluster 1 had the smallest LENGTH, SA, and NF. We selected the top 10 accessions for each RMT, and IT208321, IT216313, and IT216137 were nominated as the best germplasms. These accessions can be recommended to breeders as materials for breeding programs. This is a preliminary report on the characterization of the root phenotype at an international gene bank and will open up the possibility of improving the available information on accessions in gene banks worldwide.

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Positive correlation between the number of root nodule primordia and seed sugar secretion in soybean (Glycine maxL.) seedlings inoculated with a low density ofBradyrhizobium japonicum

Cited by 7 publications

References 25 publications

RhizobiumProliferation-Supporting Substances in Seed Exudates of Common Bean (Phaseolus vulgarisL.)

RhizobiumProliferation-Supporting Substances in Seed Exudates of Common Bean (Phaseolus vulgarisL.)

Proliferation of inoculatedRhizobiumand indigenous microbes around the periphery of pre-rooting common beanPhaseolus vulgarisL. seeds sown in non-sterile soils

High-Throughput Phenotypic Characterization and Diversity Analysis of Soybean Roots (Glycine max L.)

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