Auxin production by bacteria associated with orchid roots

Цавкелова, Е. А.; Чердынцева, Т. А.; Netrusov, A. I.

doi:10.1007/s11021-005-0027-6

Cited by 89 publications

(62 citation statements)

References 6 publications

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“…Earlier observations showed that, following storage in mineral oil, the capacity of rhizobacteria to synthesize and release auxins was decreased or even lost only when the medium was supplemented with tryptophan (Tsavkelova et al 2005). Our strains produced different amounts of IAA in the presence of 200 lg/ml tryptophan, strain 15834 producing about 8 times more IAA than strain LBA 1334.…”

Section: Discussionmentioning

confidence: 65%

Enhancement of Festuca rubra L. germination and seedling growth by seed treatment with pathogenic Agrobacterium rhizogenes

2014

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The study concerned effects of two methods of red fescue seeds treating with wild type Agrobacterium rhizogenes strains (15834 and LBA 1334): soaking and matriconditioning with Micro-Cel E solid carrier. The effects were assessed from germination and seedlings growth rates. The bacterial indole-3-acetic acid (IAA) production and ACC deaminase activity were also determined. Both strains are able to produce the IAA and showed ACC deaminase activity in various amounts. The strains accelerated seeds germination, seedling emergence and development. The beneficial effect on those processes was visible when seeds were soaked for 1 h in bacterial suspension and, especially, when the bacteria were present during Micro-Cel E conditioning. The main effect observed upon inoculation of seeds during priming was increased growth of lateral roots and more complex architecture of the branching root system. Treating seeds with A. rhizogenes simultaneously with Micro-Cel E priming as a carrier is a promising method of enhancing grass germination and seedlings growth, particularly by improving the root system development.

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Section: Discussionmentioning

confidence: 65%

Enhancement of Festuca rubra L. germination and seedling growth by seed treatment with pathogenic Agrobacterium rhizogenes

2014

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“…Growth promoting bacteria improved plant growth by decomposing mineral material and making availability of nutrients to plants (Dobbelaere et al, 2003), synthesizing and liberating growth hormones (Tsavkelova et al, 2005) and reducing the susceptibility to pathogens (Calvo-Bado et al, 2006). Growth stimulating bacteria especially Rhizobia, Sinorhizobium meliloti and Azotobacter species have been reported to increase the yield and nitrogen content of plants (Khalid et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

“…Mechanisms implicated to plant growth stimulation include nitrogen fixation (Choudhury and Kennedy, 2004;Kloepper et al, 1989) suppression of plant pathogens (Calvo-Bado et al, 2006), mineralizaion of organic phosphorous or solubilization of inorganic phosphoric compounds, (Dobbelaere et al, 2003), phytohormone production (Tsavkelova et al, 2005), root colonization, antibiotics production, siderophore production and enhanced mineral uptake (Dobbelaere et al, 2003). Microbial inoculation of soil is required for a number of applications, such as plant growth promotion, inhibition of plant pathogens, and biodegradation of toxic compounds, soil structure improvement and microbial leaching of metals (Van Veen et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Plant growth promoting capability of Azotobacter as mono and mix culture on Vigna radiata

Kiran¹,

Afrasayab²,

Abbas³

et al. 2012

Afr. J. Microbiol. Res.

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In the present study mono and mixed culture bacterial combinations of Azotobacter were used to inculcate Vigna radiata seeds. In general, bacterial inoculations (mono and mixed cultures) promoted seed germination, early growth parameters, auxin content, soluble protein content, peroxidase and acid phosphatase activity relative to non-inoculated control seedlings. Increase of (23%) as well as decrease (6.8%) in the root length were observed with bacterial inoculations relative to non-inoculated seedlings. About 20.07% enhancements in fresh weight and 62% enhancement in dry weight was observed in case of bacterial inoculations. Among the monoculture Ab-4(A3) induced pronounced growth stimulator effects, mixed culture combinations B6, B7, and B10 showed pronounced synergistic effects relative to respective monocultures, while B2 exhibited negative in majority of the parameters being studied.

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“…O crescimento vegetal pode ser promovido através de várias formas, dentre elas, fixação biológica de nitrogênio, síntese de hormônios e outras moléculas, controle biológico de patógenos e pela solubilização de nutrientes com consequente aumento da oferta de fósforo biodisponível e outros oligoelementos para absorção pelas plantas (Glick, 1995;Vessey, 2003;Adesemoye et al, 2010;Hungria et al, 2010;Canellas et al, 2015). e Saraf, 2003;Yasmin et al, 2004;Tsavkelova et al, 2005;Joseph et al, 2007;Wani et al, 2007), produção de amônia (Joseph et al, 2007; Wani e Khan, 2010), atividade antifúngica (Cazorla et al, 2007), produção de sideróforos (Wani et al, 2007) Nesse sentido, sugere-se que a inoculação de consórcios de RPCPs possa contribuir para a obtenção de um nível de nutrição adequado ao desenvolvimento do milho e da soja com menor uso de fertilizantes NPK e reduzir os impactos destes no meio ambiente. Desta forma, o presente estudo teve como objetivos, avaliar o efeito da inoculação de consórcio de bactérias do gênero Bacillus no desenvolvimento de milho e soja cultivados em casa de vegetação, quando associada à aplicação de adubação NPK em diferentes concentrações, visando sua redução e nos experimentos com soja testar a influência do local de inoculação dos microrganismos.…”

Section: Introductionunclassified

“…e Saraf, 2003;Yasmin et al, 2004;Tsavkelova et al, 2005;Joseph et al, 2007;Wani et al, 2007), produção de amônia (Joseph et al, 2007;Wani e Khan, 2010), atividade antifúngica (Cazorla et al, 2007), produção de sideróforos (Wani et al, 2007) e de antibióticos (Freitas e Pizzinatto, 1997). Além destas características as bactérias do gênero Bacillus apresentam outras características favoráveis à produção de inoculantes comerciais, tais como a produção de endosporos, a facilidade de manuseio e de aplicação podendo ser misturados com outros defensivos agrícolas (Freitas e Vildoso 2004).…”

Section: Introductionunclassified

Potencial Biotecnológico De Rizobactérias Promotoras De Crescimento De Plantas No Cultivo De Milho E Soja

et al. 2017

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Eutroférrico. The NPK fertilization was carried out on the ground where the base saturation was previously corrected by the addition of calcium carbonate. Maize cultivation inoculation was made in the seeds and the experimental design was completely randomized type (3×3) by varying the type of inoculum, and amount of nitrogen-phosphorus-potassium nutrients. The experiment with soybeans followed the design (3×3×2) by varying the type of inoculum, amount of NPK and type of inoculation (seed or soil). The experiments were performed in triplicate. Ten seeds were planted and were determined after 15 days the germination percentage and thinning carried out, leaving three plants per pot, which were cultured for 71 days, keeping the amount of water in 60 % of the soil retention capacity. The results showed that the maize plants had higher dry matter root when he received the inoculum 1 and NPK fertilization in ideal concentration for culture and had a higher content of phosphorus and potassium in the shoots than the other treatments. In soybean cultivation, the inoculum 2 was more favorable to the dry matter yield of shoot, number of pods and seeds, regardless of NPK fertilization level received when the bacteria were inoculated in the soil. The results indicated that the formulations used have biotechnological potential to increase the development and plant nutrition corn and soybeans. Todos as informações e direitos sobre o presente artigo são de total e única responsabilidade do(s) autor(es). IntroduçãoA demanda crescente pela produção de alimentos, como consequência do crescimento populacional, exige o desenvolvimento de novas tecnologias aplicadas à agricultura para tornar esta atividade cada vez mais produtiva. O modelo de produção agrícola atual privilegia o uso intensivo de insumos, como fertilizantes e agrotóxicos. O uso indiscriminado desses insumos pode causar danos à saúde e ao meio ambiente, aumentando a importância de se adotar técnicas e/ou práticas mais sustentáveis e que minimizem os impactos desta atividade (Mao et al., 2012;Canellas et al., 2015).O uso de rizobactérias promotoras de crescimento de plantas (RPCPs) pode constituir uma alternativa biológica promissora para aumentar a produtividade das culturas (Coelho et al., 2007; Marques et al., 2010) (Gomes et al., 2003;Chamangasht et al., 2012). Nos casos citados, a promoção do crescimento está ligada a fatores como a maior produção de grãos, maior germinação em casa de cultivo e no campo, melhor absorção dos nutrientes, aumento tanto no peso seco quanto na altura dos cultivares dentre outros.As RPCPs quando aplicadas ao solo, em formulações simples ou misturas de inoculantes, podem causar diferentes efeitos no desenvolvimento das plantas, tais como, aumentar a germinação das sementes, a emergência das plântulas e beneficiarem o crescimento das mesmas (Lazzaretti e Bettiol, 1997). O crescimento vegetal pode ser promovido através de várias formas, dentre elas, fixação biológica de nitrogênio, síntese de hormônios e outras moléculas, controle biológ...

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Auxin production by bacteria associated with orchid roots

Cited by 89 publications

References 6 publications

Enhancement of Festuca rubra L. germination and seedling growth by seed treatment with pathogenic Agrobacterium rhizogenes

Enhancement of Festuca rubra L. germination and seedling growth by seed treatment with pathogenic Agrobacterium rhizogenes

Plant growth promoting capability of Azotobacter as mono and mix culture on Vigna radiata

Potencial Biotecnológico De Rizobactérias Promotoras De Crescimento De Plantas No Cultivo De Milho E Soja

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