Biocontrol ofPhytophthora cactorumin vitro withEnterobacter aerogenes

Brewster, D. T.; Spiers, A. G.; Hopcroft, D. H.

doi:10.1080/01140671.1997.9513982

Cited by 7 publications

(6 citation statements)

References 26 publications

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“…Extensive degradation of cell wall and membrane was found and some organelles disappeared, resulting in the inhibition of mycelial growth. Similar results were also observed in cells of Phytophthora capsici and P. cactorum after exposure to fungicide ( Brewster et al, 1997 ; Xu et al, 2007 ). The destroyed cell integrity and organelles may be involved in the response of fungal defenses ( Yang et al, 2010 ).…”

Section: Discussionsupporting

confidence: 82%

A Newly Isolated Streptomyces sp. YYS-7 With a Broad-Spectrum Antifungal Activity Improves the Banana Plant Resistance to Fusarium oxysporum f. sp. cubense Tropical Race 4

et al. 2020

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Fusarium wilt of banana caused by Fusarium oxysporum f. sp. cubense (Foc) is one of the most destructive diseases, severely limiting the development of banana industry. Especially, Foc tropical race 4 (Foc TR4) can infect and destroy almost all banana cultivars. Until now, there is still a lack of an effective method for controlling fusarium wilt. A biocontrol strategy using Actinobacteria is considered as a promising method for management of disease and pest. In this study, 229 Actinobacteria were isolated from rhizosphere soil samples of a primitive ecological mountain. An actinobacterium strain marked with YYS-7 exhibited a high antifungal activity against Foc TR4. Combining the physiological and biochemical characteristics as well as alignment of the 16S rRNA sequence, the strain YYS-7 was assigned to Streptomyces sp. The crude extracts of Streptomyces sp. YYS-7 obviously inhibited the mycelial growth of Foc TR4. The cell integrity and ultrastructure were seriously destroyed. In addition, Streptomyces sp. YYS-7 and crude extracts also showed a broad-spectrum antifungal activity against the selected seven phytopathogenic fungi. A gas chromatography-mass spectrometry (GC-MS) was used to predict the antifungal metabolites. A total of eleven different compounds were identified, including phenolic compounds, hydrocarbons, esters and acids. In the pot experiment, the crude extracts can significantly improve the banana plant's resistance to Foc TR4. Hence, Streptomyces sp. YYS-7 will be a potential biocontrol agent for the biofertilizer exploitation and the discovery of new bioactive substances.

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Section: Discussionsupporting

confidence: 82%

A Newly Isolated Streptomyces sp. YYS-7 With a Broad-Spectrum Antifungal Activity Improves the Banana Plant Resistance to Fusarium oxysporum f. sp. cubense Tropical Race 4

et al. 2020

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“…Intensitas penyakit budok pada tanaman nilam yang diinokulasi dengan rizobakteria antagonis. dilaporkan telah digunakan sebagai agens hayati untuk mengendalikan Phytophthora cactorum pada apel (Brewster et al 1997), Botrytis cinerea dan Phytium sp. pada tanaman tomat (Shi dan Sun 2017), serta Rhizoctonia solani pada tanaman kapas (Chernin et al 1995).…”

Section: Pengujian Skala Potunclassified

Isolation and Characterization of Potential Isolates of Rhizosphere Bacteria to Contro Budok Disease in Patchouli Plant

et al. 2019

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Synchytrium pogostemonis, the causal agent of budok disease, is one of the major limiting factors in patchouli production in Indonesia. Patchouli farmers usually control budok disease with chemical fungicides. Chemical control pollutes environment and disrupts agricultural ecosystem. Therefore, an environmentally friendly pest control should be conducted to control the disease. The objective of the study was to isolate and evaluate some rhizobacteria from the rhizosphere of patchouli and black pepper plants against Fusarium oxysporum f.sp. vanillae, F. solani, Sclerotium rolfsii. Potential rhizobacterial isolates were tested to control budok disease on a pot scale. The results showed that 26 rhizobacterial isolates from 100 tested were antagonistic to F. oxysporum, F. solani and S. rolfsii. Four rhizobacteria isolates (RL13-A, RL31-A, RL35-A, RL32-A) showed strong inhibition (>40 %) against the 3 pathogens. In polibag experiment, RL35-A, PS9, RL13-A, RL32-B, RL31-A isolates were able to suppress budok disease significantly by 84.01; 76.00; 65.99; 43.99; and 21.98 % respectively. These results indicated that RL35-A isolates have strong antagonistic effect compared to other isolates. Based on 16S rDNA analysis, RL35-A isolates possessed close relationship (99 %) with all species of Enterobacter sp. The antibiotic compound extracted from RL35-A culture broth using GC-MS analysis was identified as phenol, 2,6-dimethoxy-(canola). These results suggested that Enterobacter sp. was potential to be developed as biological agent for controlling budok disease in patchouli plants.

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“…Enterobacter aerogenes Apples Reported to control P. cactorum infection of apples in nursery soils [4] Serratia plymuthica Cotton Controls Rhizoctonia solani [5] Enterobacter cloacae Cucumbers Increased the yield of cucumbers [6] Enterobacter ludwigii Lolium perenne L. First report on the PGPR features of E. ludwigii [7] Enterobacter sp Coconut rhizosphere Production of phytohormones, siderophores and antibiotics [8] Enterobacter sp. Broccoli Promoted growth of Brassica oleracea (broccoli) [9] Serratia plymuthica Peppers Biocontrol agent for management of Phytophtora capsici [10] Acinetobacter calcoaceticus Wheat rhizosphere Improved plant growth in pot and field studies.…”

Section: Source Of Isolation/ Crop On Which Effect Was Recorded Effecmentioning

confidence: 99%

Biosafety of Novel Bioinoculants

Selvakumar¹,

Panneerselvam²,

An³

2013

J Biofertil Biopestici

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With rapid advances in microbial discovery and inoculant technology, the realm of microbial inoculants has seen a significant shift from the conventional range of microbes viz., Rhizobium, Azospirillum, Azotobacter, etc. to include a wide range of bacterial and fungal genera that colonize the rhizosphere and promote plant growth in a myriad fashion. Such microbial strains with beneficial traits have been included under the umbrella terminologies of Plant Growth Promoting Rhizobacteria (PGPR) and Plant Growth Promoting Rhizofungi (PGRF). While this is definitely a welcome step, it brings along with it a host of pertinent questions, of which the biosafety of the microbial strains used for inoculant formulation is of paramount importance. This rationalization becomes imperative in the present scenario, where the etiology and pathogenesis of several hitherto unknown or lesser known bacterial species are being deciphered, and opportunistic pathogenic properties are being attributed to several commonly occurring environmental microbes. Another issue that needs to be factored in this paradigm is the possible horizontal gene transfer between naturally occurring microbes and the introduced inoculant strains. This assumes significance since horizontal gene transfer amongst organisms plays a larger role in the context of environmental protection and evolving antibiotic resistance. Hence a judicious analysis of the benefits and risks associated with novel microbial inoculants need to be addressed, before its eventual usage. Therefore it is imperative for microbiologist's agronomists and plant protection scientists to be aware about the latest trends in biosafety, in order to make informed decisions in their day to day work. Hence this article will primarily focus on the need for ensuring the biosafety of the newer bioinoculants, and the relevant regulatory frameworks that are in place internationally.

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Biocontrol ofPhytophthora cactorumin vitro withEnterobacter aerogenes

Cited by 7 publications

References 26 publications

A Newly Isolated Streptomyces sp. YYS-7 With a Broad-Spectrum Antifungal Activity Improves the Banana Plant Resistance to Fusarium oxysporum f. sp. cubense Tropical Race 4

A Newly Isolated Streptomyces sp. YYS-7 With a Broad-Spectrum Antifungal Activity Improves the Banana Plant Resistance to Fusarium oxysporum f. sp. cubense Tropical Race 4

Isolation and Characterization of Potential Isolates of Rhizosphere Bacteria to Contro Budok Disease in Patchouli Plant

Biosafety of Novel Bioinoculants

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