Cadaverine production by Azospirillum brasilense and its possible role in plant growth promotion and osmotic stress mitigation

Cassán, Fabricio; Maiale, Santiago Javier; Masciarelli, Oscar; Vidal, Alfonso Andrés; Luna, Virginia; Ruíz, Oscar Adolfo

doi:10.1016/j.ejsobi.2008.08.003

Cited by 187 publications

(83 citation statements)

References 29 publications

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“…The colonization of roots by microorganisms is, in many cases, beneficial to plant growth, development and productivity. The synthesis of plant hormones such as auxins, gibberellins, cytokinins (Tien et al, 1979;Ahmad et al, 2008) and polyamines (Cassán et al, 2009) by some microorganisms that inhabit the rhizosphere are considered to be involved in major microbial interactions with the host plants (Srinath et al, 2003;Yang et al, 2009). Bacteria that are beneficial to plants and free-living in soil have been called plant growth-promoting rhizobacteria (Kloepper at al., 1989;Solano et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Bactérias produtoras de auxinas isoladas de raízes de Cattleya walkeriana, orquídea Brasileira ameaçada de extinção, e sua função na aclimatização

Júnior

Pedrinho

Castellane

et al. 2011

Rev. Bras. Ciênc. Solo

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SUMMARYAuxin-producing bacteria inhabit the roots of orchids and can bring benefits to the host plant. Plants of this family are multiplied by in vitro assimbiotic conditions and little is known about the role of these microorganisms for ex vitro acclimatization. Four auxin-producing rhizobacteria isolated from the specie Cattleya walkeriana were evaluated for their ability to promote survival and growth of in vitro germinated plantlets during ex vitro acclimatization. Partial sequencing of the 16S rRNA genes of bacteria cultures from root velamen of this epiphytic species identified them as Bacillus, Burkholderia, Enterobacter and Curtobacterium. The presence of indole compounds in the filtered supernatants of liquid cultures was quantified by colorimetric assay and confirmed by HPLC. Indole-3-lactic acid (ILA) and indole-3-acetaldehyde (IAAld) were present in high quantities, except in Enterobacter sp. cultures, where in indole-3-acetic acid (IAA) and indole-3-pyruvic acid (IPA) were more prevalent. These rhizobacteria were inoculated into asymbiotically-germinated plantlets of the host orchid, acclimatized in greenhouse for 90 days and assessed for their growth-promoting ability. The lowest ability to promote growth was observed for Burkholderia sp. and Curtobacterium sp., while Bacillus sp. and Enterobacter sp. improved growth in all evaluated characteristics and increased the percentage of plantlet survival. This

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Section: Introductionmentioning

confidence: 99%

Bactérias produtoras de auxinas isoladas de raízes de Cattleya walkeriana, orquídea Brasileira ameaçada de extinção, e sua função na aclimatização

Júnior

Pedrinho

Castellane

et al. 2011

Rev. Bras. Ciênc. Solo

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“…PGPB can promote plant growth and development by indirect or direct means (Cassán et al 2009), that can facilitate plant growth of plants under optimal, biotic or abiotic stress conditions. They can also produce phytohormones and synthesize some less well characterized low molecular mass compounds or enzymes (Glick et al 2007).…”

Section: Introductionmentioning

confidence: 99%

The impact of plant growth promoting bacteria (PGPB) on the development of phytopathogenic fungi

2014

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The main purpose of this study was to evaluate impact of plant growth promoting bacteria (PGPB) on the development of phytopathogenic fungi and correlate it with a potential effects on the growth of plants under unfavorable conditions, in order to improve the efficiency of a phytoremediation process. The conducted research focused on the antifungal properties of PGPB. In this study, 51 isolates of bacteria were obtained after diversified disinfection time from plants growing on soil after sewage sludge amendment. The results revealed that some isolated bacteria, mainly endophytic ones, inhibited the development of Fusarium oxysporum, F. culmorum and Alternaria alternata.

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“…This plant-bacteria relationship meets essential prerequisites, which demonstrate that it is a true symbiosis (ChristiansenWeniger C and Vanderleyden J, 1994). The nitrogenase activity of A. brasilense, in terms of associative symbiotic nitrogen fixation, has been reported by many workers (Okon, 1985;Tilak and Subba Rao, 1987;Rodriguez et al, 2004;Cassan et al, 2009;Couillerot et al, 2012). The acetylene reduction rate was found to be sufficiently high with Azospirillum along with 2,4-D than with Azospirillum alone (Table 1).…”

Section: Resultsmentioning

confidence: 99%

Effect of 2,4-D treatment and Azospirillum inoculation on growth of Cymbopogon winterianus

Siddhartha¹,

Goswami²,

Kalpataru³

et al. 2014

Afr. J. Microbiol. Res.

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The association of Cymbopogon winterianus (Citronella), a member of the Poaceae family, with the N 2 -fixing bacteria, Azospirillum was examined to evaluate possible benefits for agriculture. The nodules on citronella were induced using plant growth regulator 2,4-dichlorophenoxyacetic acid (2,4-D) 1.0 ppm in nitrogen free Hoagland's solution. Concentration of 2,4-D greater than 1.0 ppm caused stunning and death, while concentration of 2,4-D less than 1.0 ppm has no obvious effect on seedling growth. The presence of nitrogenase activity (acetylene reduction assay) and leghemoglobin (hemoprotein found in the nitrogen-fixing root nodules) was noticed in the plants treated with Azospirillum either alone or with nodulated plants, but higher activity was noticed in nodulated Azospirillum treated plants. These results confirmed the nitrogenase activity of Azospirillum brasilense in association with 2,4-D induced nodules of citronella. After transplanting to pots, it was noticed that nodulated and Azospirillum -treated plants showed higher chlorophyll content in leaf, enhanced nitrate reductase (NR) activity, leading to higher yield as compared to the control plants (non-nodulated). The nodulated plants treated with Azospirillum also had higher physiological activities as compared to plants treated only with Azospirillum. The results provide evidence that the plants belonging to the family Poaceae are potentially able to create a symbiosis with diazotropic bacteria, which colonize para-nodule tissue intracellularly, promoting a higher level of nitrogen (N 2 ) fixation leading to better growth and plant development.

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Cadaverine production by Azospirillum brasilense and its possible role in plant growth promotion and osmotic stress mitigation

Cited by 187 publications

References 29 publications

Bactérias produtoras de auxinas isoladas de raízes de Cattleya walkeriana, orquídea Brasileira ameaçada de extinção, e sua função na aclimatização

Bactérias produtoras de auxinas isoladas de raízes de Cattleya walkeriana, orquídea Brasileira ameaçada de extinção, e sua função na aclimatização

The impact of plant growth promoting bacteria (PGPB) on the development of phytopathogenic fungi

Effect of 2,4-D treatment and Azospirillum inoculation on growth of Cymbopogon winterianus

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