Nodulation and Growth of a Supernodulating Soybean Mutant SS2-2 Symbiotically Associated with Bradyrhizobium japonicum

Lestari, Puji; Van, Kyujung; Kim, Moon Young; Lee, Suk-Ha

doi:10.21082/jbio.v2n1.2006.p8-15

J. AgroBiogen

2006

DOI: 10.21082/jbio.v2n1.2006.p8-15

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Nodulation and Growth of a Supernodulating Soybean Mutant SS2-2 Symbiotically Associated with Bradyrhizobium japonicum

Puji Lestari¹,

Kyujung Van²,

Moon Young Kim³

et al.

Abstract: <p class="p1">Mutan kedelai penghasil nodulsuper menunjukkan kelemahan dalam kontrol autoregulasi pada nodulasi dan perbedaan fenotip dibandingkan dengan tipe liarnya. Studi untuk mengevaluasi karakter pertumbuhan dan nodulasi dari kedelai penghasil nodulsuper dalam asosiasinya dengan <em>Bradyrhizobium japonicum </em>dilakukan dalam penelitian ini. Tiga genotip kedelai, yaitu mutan kedelai penghasil nodulsuper SS2-2, tipe liarnya Sinpaldalkong 2 dan kedelai kontrol Jangyeobkong diinokulasi d… Show more

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Cited by 3 publications

References 24 publications

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Herbicide Toxicity to Soybean–Rhizobium Symbiosis as Affected by Soil pH

Aliverdi

Ahmadvand

2018

Bull Environ Contam Toxicol

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The current study examined whether soil pH could influence the toxicity of herbicides to soybean-rhizobium symbiosis. This can be useful for farmers to minimize the toxicity of them to crop-rhizobium symbiosis via applying their reduced doses. The toxicity of bentazon, metribuzin, and trifluralin to soybean-rhizobium symbiosis was investigated in pH 6.4, 7.2, and 8 soils. Seed inoculation decreased shoot:root (S:R) ratio but increased height, shoot dry weight (SDW), root dry weight (RDW), shoot nitrogen content (SNC), root nitrogen content (RNC), and nitrogen fixation effectiveness (NFE) in the pH 7.2 soil without herbicide application. All herbicides decreased NFE in all soil pH regimes except metribuzin in the pH 6.4 soil. Unlike trifluralin, the toxicity of bentazon and metribuzin to soybean-rhizobium symbiosis was influenced by the soil pH. It can be concluded that soil acidification and alkalization, which can rapidly occur in agroecosystems, can decrease and increase the toxicity of bentazon and metribuzin to soybean-rhizobium symbiosis, respectively.

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Herbicide Toxicity to Soybean–Rhizobium Symbiosis as Affected by Soil pH

Aliverdi

Ahmadvand

2018

Bull Environ Contam Toxicol

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On the efficiency of legume supernodulating mutants

Novák

2010

Annals of Applied Biology

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The supernodulating mutants of legumes lack the internal regulation of the number of symbiotic root nodules that harbour N2‐fixing nodule bacteria. On one hand, these mutants represent an efficient tool for dramatic increase in the degree of rhizobial symbiosis development. The trait of released nodulation is often associated with the desirable resistance of nodule initiation and functioning to the inhibition by ambient nitrate. On the other hand, the more intense and stable atmospheric nitrogen fixation of supernodulated plants is devalued by plant growth depression that results from the disproportion between the photosynthetic capacity of the shoot and the catabolic demands of symbiotic nodules. The deleterious effects of excessive nodulation can be neutralised or alleviated by a breeding strategy aimed at creating an ideotype of N2‐fixing legume. The growth depression can be diminished by the reduction in the nodule number typical for supernodulators, that is, 6–10‐fold of the wild type, to the level found permissive for the particular crop. This shift should be accompanied with breeding aimed at the increased photosynthetic capacity of the shoot. Forage varieties of legumes represent a reserve of high photosynthetic and shoot growth capacity, thanks to a long‐term breeding history for green biomass accumulation. Moreover, the deleterious effects of supernodulation are less perceived after introgression into the background of forage varieties in view of different criteria in their evaluation, such as nitrogen accumulation and biomass production per crop area unit. The growth of supernodulators can be further corrected by breeding for auxiliary traits such as long‐vine shoot architecture, a longer vegetation period and late flowering. The same strategy is applicable to the compensation for inherent pleiotropic changes in plant development, which are often associated with primarily symbiotic mutations. Supporting evidence for the efficiency of the described approach has already been reported.

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Atributos químicos e estoques de carbono em Latossolo sob plantio direto no cerrado do Piauí

Leite

Galvão

Neto³

et al. 2010

Rev. bras. eng. agríc. ambient.

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RESUMOO sistema de plantio direto é uma alternativa viável para o uso sustentável dos solos. O objetivo do presente trabalho foi avaliar a influência do sistema plantio direto com diferentes tempos de implantação e do plantio convencional sobre os atributos químicos e os estoques de C de um Latossolo VermelhoAmarelo do cerrado piauiense. Amostras de solo foram coletadas nas camadas de 0-5, 5-10, 10-20 e 20-40 cm em sistema de plantio convencional (PC) e plantio direto (PD) com 2 (PD2), 4 (PD4) e 6 (PD6) anos de implantação, além de uma área sob floresta nativa de cerrado (FNC). Foram determinados o pH em água, P extraível (Pext), bases trocáveis, Al, acidez potencial (H+Al), carbono orgânico total (COT) e carbono da biomassa microbiana (C mic ). A adoção do sistema plantio direto aumentou o pH, os teores de P e de bases trocáveis do solo, em comparação com o PC. Em relação ao PC, os estoques de COT e C mic aumentaram 34 e 99% no PD2, 47 e 92% no PD4 e 61 e 108% no PD6, respectivamente, na camada superficial de 0-20 cm. A implantação do sistema plantio direto melhora os atributos químicos e aumenta os estoques de carbono orgânico total e microbiano do solo e seu uso contínuo contribui para a qualidade do solo em áreas do cerrado piauiense.Palavras-chave: sistemas de preparo do solo, fertilidade do solo, carbono da biomassa microbiana, Glycine max L. Chemical attributes and carbon stocks in an Oxisolunder no-tillage in savannah of Piauí state ABSTRACT No-tillage adoption has been considered a viable alternative for sustainable soil use. This work aimed to evaluate the influence of no-tillage system with different times of adoption and conventional tillage on chemical attributes and carbon stocks in an Oxisol of the savannah of Piauí in Northeastern Brazil. Soil samples in the 0-5, 5-10, 10-20 and 20-40 cm layers were collected in conventional tillage (CT) no-tillage (NT) with 2 (NT2), 4 (NT4) and 6 (NT6) years of adoption and native forest (NF). The following chemical properties were evaluated: pH, extractable P, exchangeable cations, Al, potential acidity (H+Al), total organic carbon (TOC) and microbial biomass carbon (C mic ). NT adoption increased pH, extractable P and exchangeable cations contents. Compared to conventional tillage, TOC and C mic stocks increased 34 and 99% (NT2), 47 and 92% (NT4) and 61 and 108% (NT6), respectively, in the superficial layer (0-20 cm). No-tillage adoption improves chemical attributes and increases total organic carbon and microbial carbon and its continuous use contributes to soil quality in savannah soils of Piaui state.

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Nodulation and Growth of a Supernodulating Soybean Mutant SS2-2 Symbiotically Associated with Bradyrhizobium japonicum

Cited by 3 publications

References 24 publications

Herbicide Toxicity to Soybean–Rhizobium Symbiosis as Affected by Soil pH

Herbicide Toxicity to Soybean–Rhizobium Symbiosis as Affected by Soil pH

On the efficiency of legume supernodulating mutants

Atributos químicos e estoques de carbono em Latossolo sob plantio direto no cerrado do Piauí

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