Recobrimento de sementes de milho com ácidos húmicos e bactérias diazotróficas endofíticas

Conceição, Patrícia Marluci da; Vieira, Henrique Duarte; Canellas, Luciano Pasqualoto; Júnior, Roberto Batista Marques; Olivares, Fábio Lopes

doi:10.1590/s0100-204x2008000400015

Cited by 20 publications

(15 citation statements)

References 5 publications

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“…Coating maize seed with DEB and HA was previously reported [29]. The germination was not affected by seed coating that promoted root growth enhancing 44% the root length in respect to control.…”

Section: Effects On Maizementioning

confidence: 65%

“…H + -ATPase activation could also be mechanistically linked to the root hairs proliferation since it was demonstrated that cell growth depends on extracellular acidification in maize roots [44]. The DEB and HA-induced stimulation of the H + -ATPase activity [29] suggest that the modifications are not restricted to root architecture, but are also extended to major biochemical components. Indeed, the driving force for most nutrient uptake is the electrochemical gradient across the plasma membrane, which is primarily generated by the H + -ATPase.…”

Section: Physiological Changesmentioning

confidence: 99%

“…The enhancement of nutrient uptake is one of more significant effect of the co-inoculation in plants, especially nitrogen and phosphorus. The activities of enzymes linked to nitrogen assimilation in maize seedlings were promoted by the H. seropedicae and HA application [29]. The treatment combining H. seropedicae and different concentration of HS induced nitrate reductase (NR) activity in leaves between 120 and 230% in relation to the control.…”

Section: Physiological Changesmentioning

confidence: 99%

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Plant growth promoting bacteria and humic substances: crop promotion and mechanisms of action

Olivares

Busato

Paula

et al. 2017

Chem. Biol. Technol. Agric.

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127

102

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High-external input agriculture is one of the most disruptive human activities, which have been justified by the current economic paradigm due to high productivity and the need to feed a growing population. However, we are dangerously close to the edge of the planet resources and both hunger and food insecurity has increased. Limiting the use of non-renewable chemical fertilizers and pesticides, changing water management, enhancing diversity and considering the often-neglected social dimension of agriculture are the bases to other chemical and biological technologies to agriculture. Biological inputs can stimulate the substitution of chemical inputs without questioning the current fundaments or can be adopted as a turning point to intensify the harsh processes of transition to more environmental friendly agriculture. The debate is open and our contribution is to develop the scientific basis for biological inputs that, unlike soluble fertilizers and pesticides, depend on a number of factors for its success in promoting crop yield. In this review, we showed the results obtained with the combined use of diazotrophic endophytic bacteria and humic substances in diverse crops (sugarcane, maize, tomato, common beans and pineapple), presenting the main morphological and physiological changes induced by biological technology. A snapshot of the state of the art of the use of plant growth promoting bacteria together with humic substances was provided, showing their potential especially when plants are subjected to moderate to severe abiotic stress. The number of studies reporting the combined use of plant growth promoting bacteria and humic substances is surprisingly low. There is an open avenue for research and encouraging debate is the goal. To overcome the conventional agriculture, maintaining productivity levels is more than scientific challenge, is a humanitarian duty. The biological inputs can help in this purpose.

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Section: Effects On Maizementioning

confidence: 65%

Section: Physiological Changesmentioning

confidence: 99%

Section: Physiological Changesmentioning

confidence: 99%

See 1 more Smart Citation

Plant growth promoting bacteria and humic substances: crop promotion and mechanisms of action

Olivares

Busato

Paula

et al. 2017

Chem. Biol. Technol. Agric.

Self Cite

127

102

View full text Add to dashboard Cite

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“…Assim, o recobrimento mostra-se como um meio de inoculação viável para bactérias diazotróficas endofíticas da espécie Herbaspirillum seropedicae (Z67), o que garante a sobrevivência dessas bactérias, no recobrimento, até a emissão das raízes pelas plantas, como observado por CONCEIÇÃO et al (2008).…”

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Efeito dos ácidos húmicos na inoculação de bactérias diazotróficas endofíticas em sementes de milho

et al. 2009

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“…Conceição et al (2008) avaliaram o efeito da estimulação causada por bactérias diazotróficas endofíticas no desenvolvimento fisiológico de semente de milho utilizando Herbaspirillum seropedicae e não verificaram diferença significativa em relação à testemunha para germinação das sementes, corroborando com os dados da presente pesquisa. É oportuno ressaltar que a literatura não retrata sobre efeito positivo do grupo das bactérias diazotróficas endofíticas sobre a germinação de sementes de Zea mays L.…”

Section: Resultsunclassified

INOCULATION OF Azospirillum brasilense IN PHYSIOLOGICAL QUALITY OF SWEET CORN SEED

Souza¹,

Magalhães²,

Alves³

et al. 2014

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RESUMO:Objetivou-se avaliar a qualidade fisiológica de sementes de milho doce submetidas à inoculação de Azospirillum brasilense em diferentes períodos e diluições em água. O experimento foi conduzido no delineamento inteiramente casualizado, com quatro repetições em esquema fatorial (4 x 4), mais uma testemunha que não recebeu inoculação de A. brasilense. Foram avaliados quatro períodos entre a inoculação e a instalação dos testes (0, 24, 48 e 72 horas) e quatro diluições do inoculante em água (1:0, 1:1, 1:2 e 1:3). Foram utilizadas sementes de milho doce híbrido comercial Tropical Plus e as estirpes de A. brasilense Ab-V5 e Ab-V6, na dose do produto comercial de 4 mL kg -1 de semente. Os parâmetros avaliados foram germinação, primeira contagem de germinação, porcentagem de sementes anormais, emergência de plântulas, índice de velocidade de emergência, comprimento de epicótilo e de raiz, massa de matéria seca da parte aérea e raiz. A diluição de A. brasilense em água não afetou nenhum parâmetro avaliado na semente de milho doce, e o aumento no tempo entre a inoculação e a instalação dos testes proporcionou redução na primeira contagem de germinação, índice de velocidade de emergência e massa de matéria seca de raiz. Conclui-se que, em condições de laboratório, a inoculação de A. brasilense não beneficia a germinação e vigor das sementes de milho doce.Palavras-chave: Germinação. Diazotrófica. Fixação biológica de nitrogênio. Vigor. INOCULATION OF Azospirillum brasilense IN PHYSIOLOGICAL QUALITY OF SWEET CORN SEED SUMMARY:The aimed of this study was to survey the physiological quality of sweet corn seeds submitted to inoculation of Azospirillum brasilense in different periods and dilutions in water. The experiment was conducted on the entirely randomized design with four replications in a factorial (4 x 4) more a witness without inoculation of A. brasilense. Were evaluated four periods between the inoculation and installation of the tests (0, 24, 48 and 72 hours) and four dilutions of the inoculant in water (1:0, 1:1, 1:2 and 1:3). Were utilized seeds of sweet corn evaluated Tropical Plus hybrids and commercial strains of A. brasilense Ab-Ab-V5 and V6, in the dose of the commercial product 4 mL kg -1 seed. The parameters evaluated were germination, first count of germination, percentage of abnormal seeds, emergency, emergency speed index, length of epicotyl and of root, mass of the dry matter of shoots and of root. The dilution of A. brasilense in water did not affect no one parameter evaluated on the seeds of sweet corn, and the increase in the time between inoculation and the installation of the tests provide reduction on the first count of germination, speed emergency index and mass of dry matter of roots. It is concluded that, under laboratory conditions, inoculation of A. brasilense not benefits to germination and seed vigor of sweet corn.

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Recobrimento de sementes de milho com ácidos húmicos e bactérias diazotróficas endofíticas

Cited by 20 publications

References 5 publications

Plant growth promoting bacteria and humic substances: crop promotion and mechanisms of action

Plant growth promoting bacteria and humic substances: crop promotion and mechanisms of action

Efeito dos ácidos húmicos na inoculação de bactérias diazotróficas endofíticas em sementes de milho

INOCULATION OF Azospirillum brasilense IN PHYSIOLOGICAL QUALITY OF SWEET CORN SEED

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