Genotypic Difference in Molybdenum Accumulation Affects N2-fixation in Tropical Phaseolus vulgar is L.

Brodrick, Stephanie J.; Giller, K.E.

doi:10.1093/jxb/42.10.1339

Cited by 29 publications

(8 citation statements)

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“…The lack of significance of the contrast 5 vs. 6 in both sites indicates that a small increase in the dose of Mo applied at R7 with a concomitant reduction in the dose of Mo applied at R5 is ineffective to increase SMoC. The ability of a genotype to accumulate Mo in seed is associated with its capacity to re-transfer Mo from the roots, nodules and pod walls to the seed (Brodrick & Giller, 1991). Thus, foliar-applied Mo at the R8 stage (pod filling) could be a better approach to increase SMoC than foliar-applied Mo before this stage.…”

Section: Resultsmentioning

confidence: 96%

<b>Split application of molybdic fertilizer at the reproductive stage of common bean increases the molybdenum content in seed

et al. 2016

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ABSTRACT. We evaluated the effects of split molybdenum (Mo) application at the reproductive stage of the common bean on seed Mo content (SMoC) and seed quality in two trials in the Zona da Mata region, Minas Gerais. Plants were sprayed with 100 or 600 g Mo ha -1 at the V4 stage. The higher dose was also split into 100(V4)+500(R5), 100(V4)+500(R7), 100(V4)+250(R5)+250(R7), and 100(V4)+150(R5)+350(R7). SMoC from plants sprayed with 600 g (five treatments) was 3.7-or 62-fold higher than those sprayed with 100 g, with seeds from the former treatments exhibiting slightly poorer quality. Application of 100 g at V4 + 500 g at the reproductive stage (four treatments) increased SMoC 1.6-or 2.7-fold compared with SMoC from plants sprayed with 600 g at V4. Split application of 500 g with two sprays increased SMoC by 11% (p = 0.257) or 16% (p = 0.013) compared with one spray of 500 g. SMoC can be higher with Mo applied at R7 (pod formation) instead of at R5 (pre-flowering), without impairing seed quality. Thus, split Mo application between the R5 and R7 stages of the common bean saves molybdic fertilizer to produce Morich seeds, with only a slight decrease in seed quality.Keywords: Phaseolus vulgaris, seed molybdenum, seed quality, seed vigor, seed germination.Parcelamento da aplicação do adubo molíbdico na fase reprodutiva do feijão-comum aumenta o conteúdo de molibdênio na semente RESUMO. Avaliamos os efeitos de parcelamentos da aplicação de molibdênio (Mo) na fase reprodutiva do feijão-comum no conteúdo de Mo na semente (CMoS) e na sua qualidade fisiológica em dois ensaios na Zona da Mata, Minas Gerais. Pulverizaram-se feijoeiros com 100 ou 600 g Mo ha -1 na fase V4. Esta última dose também foi parcelada: 100(V4)+500(R5), 100(V4)+500(R7), 100(V4)+250(R5)+250(R7) e 100(V4)+150(R5)+350(R7). O CMoS de plantas pulverizadas com 600 g (cinco tratamentos) foi 3,7 ou 62 vezes maior que o das pulverizadas com 100 g; sementes deste tratamento apresentaram qualidade ligeiramente melhor que as daqueles. Aplicação de 100 g em V4 + 500 g na fase reprodutiva (quatro tratamentos) aumentou 1,6 ou 2,7 vezes o CMoS comparativamente ao CMoS de plantas adubadas com 600 g em V4. Parcelamento de 500 g em duas pulverizações aumentou em 11% (p = 0,257) ou 16% (p = 0,013) o CMoS comparativamente a uma pulverização. O CMoS pode ser mais alto quando se pulveriza o Mo em R7 (formação de vagens) comparativamente a R5 (pré-floração), sem prejuízo à qualidade da semente. Logo, o parcelamento do Mo nessas duas fases do feijão-comum economiza fertilizante molíbdico para produzir sementes ricas em Mo, com ligeira redução da qualidade da semente. Palavras-chave:Phaseolus vulgaris, molibdênio na semente, qualidade da semente, vigor da semente, germinação da semente.

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Section: Resultsmentioning

confidence: 96%

<b>Split application of molybdic fertilizer at the reproductive stage of common bean increases the molybdenum content in seed

et al. 2016

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“…However, legume crop yield and nodulation did not always respond to the addition of Mo to seed inoculant formulas. No significant effects were observed due to the Mo content of black beans, common beans, and soybeans [13, 35, 46] These different observations most likely relate to differences in plant genetics with regard to Mo accumulation in seeds [47]. …”

Section: Discussionmentioning

confidence: 99%

Molybdate in Rhizobial Seed-Coat Formulations Improves the Production and Nodulation of Alfalfa

et al. 2017

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Rhizobia-legume symbiosis is the most well researched biological nitrogen fixation system. Coating legume seeds with rhizobia is now a recognized practical measure for improving the production of legume corp. However, the efficacy of some commercial rhizobia inoculants cannot be guaranteed in China due to the low rate of live rhizobia in these products. A greenhouse experiment was conducted to assess the effects of different rhizobial inoculant formulations on alfalfa productivity and nitrogen fixation. Two rhizobia strains, (ACCC17631 and ACCC17676), that are effective partners with alfalfa variety Zhongmu No. 1 were assessed with different concentrations of ammonium molybdate in seed-coat formulations with two different coating adhesives. Our study showed that the growth, nodulation, and nitrogen fixation ability of the plants inoculated with the ACCC17631 rhizobial strain were greatest when the ammonium molybdate application was0.2% of the formulation. An ammonium molybdate concentration of 0.1% was most beneficial to the growth of the plants inoculated with the ACCC17676 rhizobial strain. The sodium carboxymethyl cellulose and sodium alginate, used as coating adhesives, did not have a significant effect on alfalfa biomass and nitrogen fixation. However, the addition of skimmed milk to the adhesive improved nitrogenase activity. These results demonstrate that a new rhizobial seed-coat formulation benefitted alfalfa nodulation and yield.

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“…Ouro Negro nodulates well (Paula Júnior et al, 2010), and the nodules are strong Mo sinks (JacobNeto et al, 1988;Brodrick & Giller 1991a). Physiologically, the ability of a genotype to accumulate Mo in seeds is associated with its capacity to re-transfer Mo from the roots, nodules and pod walls to the seeds (Brodrick & Giller, 1991b).…”

Section: Mo Concentration and Content In The Seeds Of Mo-fertilized Gmentioning

confidence: 99%

“…One way to use Mo fertilizer efficiently to increase Mo content in seed is to know the genotypic variability in the capacity to accumulate foliar-applied Mo in the seeds. When the soil is the main Mo source, the common bean genotypes differ in the capacity to accumulate Mo in seeds (Franco & Munns, 1981;Brodrick & Giller, 1991b;Brodrick et al, 1995). However, the genotypic variability in the capacity to accumulate Mo in seeds has not been studied so far for foliar-applied Mo.…”

Section: Introductionmentioning

confidence: 99%

Genotypic variability in seed accumulation of foliar-applied molybdenum to common bean

Vieira

Júnior

Carneiro

et al. 2014

Rev. Bras. Ciênc. Solo

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SUMMARYThe genotypic variability in molybdenum (Mo) accumulation in common bean seeds has been demonstrated in cases in which soil is the main Mo source, but this variability is yet unknown when Mo is foliar-applied. Therefore, seed Mo concentrations (SMoCc) and seed Mo contents (SMoCt) of 12 genotypes were determined in four experiments in the Zona da Mata, Minas Gerais, Brazil, in which plants were sprayed with 600 g ha -1 Mo. For comparison, two additional experiments without external Mo were conducted. Without Mo application, the average SMoCc was undetectable or 2.83 µg g -1 , without significant differences among genotypes. On average, with Mo applications, SMoCc ranged from 14.7 to 25.0 µg g -1 and SMoCt, from 3.94 to 6.84 µg. 'Majestoso' was among the genotypes with the highest SMoCc in the four experiments. However, the large-seeded 'Jalo MG-65' and 'Carnaval' generally had higher SMoCt than the small-seeded 'Majestoso'. 'Ouro Negro' and especially 'Valente' were among the genotypes with the lowest SMoCc and SMoCt. The values of these variables were 61 and 90 %, respectively, higher for 'Majestoso' than those for 'Valente'. Our results suggest that common bean genotypes differ in their capacity to accumulate foliar-applied Mo in the seeds. Mo-rich seeds of large-seeded genotypes or of small-seeded of small-seeded genotypes with good capacity to accumulate Mo in seeds can be produced with relatively less Mo fertilizer.Index terms: Phaseolus vulgaris, seed molybdenum content, foliar fertilization, growth habit.(

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Genotypic Difference in Molybdenum Accumulation Affects N2-fixation in Tropical Phaseolus vulgar is L.

Cited by 29 publications

References 0 publications

<b>Split application of molybdic fertilizer at the reproductive stage of common bean increases the molybdenum content in seed

<b>Split application of molybdic fertilizer at the reproductive stage of common bean increases the molybdenum content in seed

Molybdate in Rhizobial Seed-Coat Formulations Improves the Production and Nodulation of Alfalfa

Genotypic variability in seed accumulation of foliar-applied molybdenum to common bean

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