Producción de ácido indol-3-acético por Pseudomonas veronii R4 y formación de raíces  en hojas de vid “Thompson seedless” in vitro

Jaramillo, Maria Peñafiel; Álvarez, Alexandra Elizabeth Barrera; Navarrete, Emma Danielly Torres; Martínez, Hayron Fabricio Canchignia; Prieto-Encalada, Humberto; Carriel, Jaime Morante

doi:10.18779/cyt.v9i1.158

Cited by 2 publications

(8 citation statements)

References 16 publications

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“…Indeed, CHA0 strain can inhibit egg hatching by 60%, as well as it can kill between 55 and 63% of juvenile J2 nematodes of M. javanica (Hamid et al, 2003;Siddiqui and Shaukat, 2003). On the other hand, R4 strain can affect the viability of Xiphinema index (Canchignia-Martínez et al, 2016;Montes et al, 2016). It is known that M. incognita is affected by strains of Serratia marcescens and Pseudomonas fluorescens in cotton (Hallmann et al, 1998;.…”

Section: Nematode Mortalitymentioning

confidence: 99%

“…We attribute the antagonist effect against M. incognita shown by the strains, to the production of volatile compounds. It is known that rhizobacteria produce diacetylfloroglucinol (2,4-DAPG), hydro-gen cyanide (HCN), pyrrolnitrine (PrnR), ironchelating siderophores (ICS), antibiotics, protease (PR), and indole-3-acetic acid (IAA) (Hamid et al, 2003;Canchignia-Martínez et al, 2016;Montes et al, 2016). These substances have been implicated in the reduction of deleterious effects and pathogenic rhizosphere microorganisms, creating an environment more favorable for the plants root growth (Siddiqui, 2005).…”

Section: Nematode Mortalitymentioning

confidence: 99%

“…However, the R4 strain also induced a reduction of gall numbers in underground tissues, compared to those in control or with the rest of the strains. BM2-12, CHA0, and R4 strains produce the enzymes protease and catalase, as well as HCN and PLT Canchignia-Martínez et al, 2016;Montes et al, 2016). It is also known that some strains of P. fluorescens can reduce galling by M. incognita and their population in roots (Siddiqui et al, 2005;Hashem & Abo-Elyousr, 2011).…”

Section: Nematode Mortalitymentioning

confidence: 99%

“…The diversity and number of existing PGPR are varied, as well as their use in different pathosystems. In recent years, rhizobacteria like Pseudomonas protegens (CHA0 strain) and Pseudomonas veronii (R4 strain) have shown a negative effect against nematodes (Canchignia-Martínez et al, 2016;Montes et al, 2016). Both microorganisms produce the auxin indole-3-acetic acid (IAA), which can help develop the grape and soybean root system (Peñafiel-Jaramillo et al, 2016;Cedeño-Saavedra et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, rhizobacteria like Pseudomonas protegens (CHA0 strain) and Pseudomonas veronii (R4 strain) have shown a negative effect against nematodes (Canchignia-Martínez et al, 2016;Montes et al, 2016). Both microorganisms produce the auxin indole-3-acetic acid (IAA), which can help develop the grape and soybean root system (Peñafiel-Jaramillo et al, 2016;Cedeño-Saavedra et al, 2017). Recently, seven rhizobacteria obtained from banana landraces rhizosphere in Los Ríos, Cotopaxi, and Bolívar provinces, Ecuador, and used in the present work, could be considered PGRP-like candidates due to their antagonistic activity (Chávez-Arteaga et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Candidate rhizobacteria as plant growth-promoters and root-knot nematode controllers in tomato plants

Chávez-Arteaga

Espinoza²,

Guzmán-López³

et al. 2022

Sci. agropecu

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Meloidogyne incognita root-knot nematode is one of the main causes of tomato root damage and consequently crop production losses. Thus, in in vitro conditions, the number of nematodes hatched eggs (%) at 4 and 6 days and nematode mortality (J2 stage) at 8, 18, and 24 h, were evaluated in Petri dishes containing the candidate rhizobacteria Enterobacter asburiae (BA4-19 and PM3-14), Acinetobacter calcoaceticus (BM2-12), Klebsiella variicola (BO3-4) and Serratia marcescens (PM3-8). The well-known Pseudomonas protegens (CHA0) and P. veronii (R4) were used as controls. In greenhouse conditions, plant height, root weight, and symptoms, as well as gall and nematode numbers, were determined in tomato plants infected by M. incognita and treated with the seven rhizobacteria. In addition, all variables were correlated using Pearson's analysis. In general, a significant correlation was observed among the variables of both experiments, showing the antagonistic capacity of the strains against nematode. It seems, that PM3-8 and PM3-14 strains reduce hatching, and cause mortality of nematodes J2 if compared with CHA0 and R4 strains. Likewise, tomato treated with BM2-12 strain shows a higher height and root weight, as well as a smaller number of galls and nematodes in their roots. This study provides evidence that PM3-8 and PM3-14 strains reduce the M. incognita egg hatching, and that the BM2-12 strain can be a plant growth-promoter potential of tomato plants.

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Section: Nematode Mortalitymentioning

confidence: 99%

Section: Nematode Mortalitymentioning

confidence: 99%

Section: Nematode Mortalitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Candidate rhizobacteria as plant growth-promoters and root-knot nematode controllers in tomato plants

Chávez-Arteaga

Espinoza²,

Guzmán-López³

et al. 2022

Sci. agropecu

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Endophytic Bacteria Can Replace the Need for Synthetic Auxin during In Vitro Rooting of Pyrus communis

et al. 2022

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This study aimed to investigate the presence of beneficial microorganisms in the micropropagation of Pyrus communis rootstocks through the isolation, identification, and selection of auxin-producing bacteria. The selected microorganisms were also inoculated in vitro to evaluate their effect on the plant rooting process and their behavior during the acclimatization phase. The results showed the presence of endophytic microorganisms in plant tissue cultures of the ‘OH×F87′ and ‘PDW’ selections. A low diversity was observed in the population of microorganisms isolated from the in vitro culture of the ‘OH×F87’and ‘PDW’ selections, with a predominance of the genera Acinetobacter, Bacillus, and Buttiauxella. The selection of promoting microorganisms was performed based on the auxin production test, in which 30.36% of the microorganisms tested positive. In the in vitro inoculation, it was possible to observe the promotion of growth and emission of roots in the pear rootstocks, from the inoculation with bacteria identified as capable of producing auxin. This process can be used to replace the inclusion of synthetic auxin in the productive chain of woody fruit trees propagated by vegetative means, such as pears. None of the bacterial isolates was notably more promising, but the general similarity of treatments containing the A. septicus and A. ursingii strains, with the synthetic auxin treatment, suggests the possibility of its use on a large scale allowing the adoption of the cheaper method. of rooting. This work opens the door for further research using new, more promising microbial isolates, and also for lower-cost microorganism cultivation techniques, such as low-cost media obtained from agro-industrial residues.

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Producción de ácido indol-3-acético por Pseudomonas veronii R4 y formación de raíces en hojas de vid “Thompson seedless” in vitro

Cited by 2 publications

References 16 publications

Candidate rhizobacteria as plant growth-promoters and root-knot nematode controllers in tomato plants

Candidate rhizobacteria as plant growth-promoters and root-knot nematode controllers in tomato plants

Endophytic Bacteria Can Replace the Need for Synthetic Auxin during In Vitro Rooting of Pyrus communis

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