Role of Bradyrhizobium japonicum induced by genistein on soybean stressed by water deficit

Nápoles, María C.; Guevara, Edgardo; Montero, F.; Rossi, Alejandro; Ferreira, Ana S.

doi:10.5424/sjar/2009073-451

Cited by 14 publications

(8 citation statements)

References 23 publications

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“…Moreover, pre-incubation of the B . japonicum inoculant with genistein probably contributed to growth in soybean through enhancement of nodulation and nitrogen fixation and alleviation of salt and drought stresses [ 34 – 37 ]. Therefore, we suggest that genistein alone induces nod gene expression in B .…”

Section: Discussionmentioning

confidence: 99%

QTLs underlying the genetic interrelationship between efficient compatibility of Bradyrhizobium strains with soybean and genistein secretion by soybean roots

2018

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Soybean plants establish symbiotic relationships with soil rhizobia which form nodules on the plant roots. Nodule formation starts when the plant roots exudate isoflavonoids that induce nod gene expression of a specific Bradyrhizobium. We examined the specific indigenous rhizobia that form nodules with the soybean cultivars Peking and Tamahomare in different soils. PCR-RFLP analysis targeted to the 16S-23S rRNA gene internal transcribed spacer (ITS) region of the bacterial type of each root nodule showed that Bradyrhizobium japonicum (USDA110-type) and Bradyrhizobium elkanii (USDA94-type) had high compatibility with the Tamahomare and Peking cultivars, respectively. We grew 93 recombinant inbred lines (RIL) of soybean seeds derived from the cross between Peking and Tamahomare in three different field soils and identified the indigenous rhizobia nodulating each line using the same PCR-RFLP analysis. QTL analysis identified one QTL region in chromosome-18 with a highly significant additive effect that controls compatibility with both B. japonicum USDA110 and B. elkanii USDA94. We also measured the amount of daidzein and genistein secretion from roots of the 93 RILs by HPLC analysis. QTL analysis showed one QTL region in chromosome-18 controlling genistein secretion from roots and coinciding with that regulating compatibility of specific indigenous rhizobia with soybean. The amount of genistein may be a major regulatory factor in soybean-rhizobium compatibility.

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Section: Discussionmentioning

confidence: 99%

QTLs underlying the genetic interrelationship between efficient compatibility of Bradyrhizobium strains with soybean and genistein secretion by soybean roots

2018

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“…Soybean is called the "Golden bean" or "Miracle bean" or "Protein hope of future" because of its high nutritive value. Soybean (Glycine max L.) is a major food and feed source that mainly cultivated for oil and protein (Napoles et al, 2009). Per 100g soybean seed contains about 40-45g protein, 20g oil, 20-25 g carbohydrate, 11.50 mg iron, 208.0 mg calcium and 432 calories energy (Rahman, 2001).…”

Section: Introductionmentioning

confidence: 99%

Effect of Gamma Radiation on Morpho-Physiological Characters of Soybean

Sarker

Islam

et al. 2015

J. Environ. Sci. & Natural Resources

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An experiment was carried out at the experimental farm of Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh during the period from January, 2011 to April, 2011. The study was conducted to evaluate the effect of gamma radiation on morpho-physiological characters of BARI soybean. Four levels of gamma irradiation viz. 200, 300, 400 and 500 Gy γ-ray from 60C source and control were irradiated on assigned two genotypes viz. BARI soybean 5 and BARI soybean 6. Data for growth analyses were collected at different days after sowing. Results revealed that the soybean varieties and gamma irradiation significantly affected morpho-physiological characters where BARI soybean 5 and 200 Gy γ-ray levels produced the greater results alone or combinations. This combination produced the tallest plant (37.42 cm), maximum leaf and branch plant -1 (23.15 and 2.10) at 75 DAS. 200 Gy γ-ray irradiated plants of BARI soybean 5 produced the highest seed yield (2373.70 kg ha-1) followed by control treatment (1887.90 kg ha-1) at the same variety. On the other hand, the plants consequential from 500 Gy γ-ray radiated of BARI soybean 5 had shown the lowest seed yield (1050.70 kg ha-1). This result indicating that irradiation significantly decreased on seed yield with increasing doses of gamma rays. So, the variety BARI soybean 5 and 200 Gy γ-ray alone or combination had outstanding superiority for plant growth over the other gamma ray levels.

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“…Recent research indicates that the expression of type III secretion system (T3SS) genes in B. japonicum USDA 110 ( B. diazoefficiens USDA 110 T ) is induced by soybean seed extract and genistein, and suggests that nodulation genes, especially the nolA and nodD2 genes, and T3SS genes play a role in nodulation ( 47 ). Therefore, the nodulation of bradyrhizobia may be associated with several factors other than the nodC gene, such as salt and water-deficit stress, the existence of other rhizosphere bacteria, and protein secretion systems ( 2 , 3 , 17 , 25 , 26 ). Our results also suggest that the expression of nodC in USDA 76 T is independent of its compatibility and infection ability.…”

Section: Discussionmentioning

confidence: 99%

Temperature-Dependent Expression of <i>NodC</i> and Community Structure of Soybean-Nodulating Bradyrhizobia

Shiro

Kuranaga

Yamamoto

et al. 2016

Microbes and environments

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In order to assess the physiological responses of bradyrhizobia and competition for the nodulation of soybean at different temperatures, we investigated the expression of the nodC gene at 20, 25, and 30°C and the abilities of bacteria to nodulate soybean in microcosms at day/night cultivation temperatures of 23/18°C, 28/23°C, and 33/28°C for 16/8 h. We tested five Bradyrhizobium USDA strains: B. diazoefficiens USDA 110T and 122, B. japonicum USDA 123, and B. elkanii USDA 31 and 76T. The expression of nodC was up-regulated by increasing culture temperatures in USDA 110T, 122, 31, and 76T, but was down-regulated in USDA 123. The proportions of USDA 110T and 122 within the community were the greatest at 28/23°C. The population of USDA 31 increased, whereas that of USDA 123 decreased with increasing cultivation temperatures. On the other hand, infection by USDA 76T was not detected, and low numbers of USDA 76T nodules confirmed its poor nodulation ability. These results indicate that the competitiveness of and infection by USDA 110T, 122, 123, and 31 for soybean nodulation depend on cultivation temperatures, and suggest that the temperature dependence of nodC expression affects the bradyrhizobial community structure.

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Role of Bradyrhizobium japonicum induced by genistein on soybean stressed by water deficit

Cited by 14 publications

References 23 publications

QTLs underlying the genetic interrelationship between efficient compatibility of Bradyrhizobium strains with soybean and genistein secretion by soybean roots

QTLs underlying the genetic interrelationship between efficient compatibility of Bradyrhizobium strains with soybean and genistein secretion by soybean roots

Effect of Gamma Radiation on Morpho-Physiological Characters of Soybean

Temperature-Dependent Expression of <i>NodC</i> and Community Structure of Soybean-Nodulating Bradyrhizobia

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