Dual Application of Bacillus Pumilus and Glomus Mosseae for Improvement of Health Status of Mandarin Plants

Chakraborty, Usha; Chakraborty, B. N.; Allay, S.; De, U. K.; Chakraborty, Arka Pratim

doi:10.17660/actahortic.2011.892.25

Cited by 6 publications

(4 citation statements)

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“…Indeed, the tiller number was highest in association with inoculation of this PGPR species. Although B. pumilis is reported [ 44 , 53 , 54 ] to enhance plant growth, it was not the conclusion based on the data reported here. No interaction with AM fungi, positive or negative, was apparent.…”

Section: Discussioncontrasting

confidence: 90%

“…No interaction with AM fungi, positive or negative, was apparent. The benefit reported [ 44 , 53 , 54 ] may be through enhanced phytohormone production but in the absence of stimulated AM fungal growth, it did not in this case produce measurable benefits to the above ground vegetative growth of wheat plants. Furthermore, although several authors report a positive relationship between PGPR and AM fungi [ 55 , 56 ] and its subsequent benefit on plant development, the relationship of B. subtilis with AM fungi appeared to be antagonistic.…”

Section: Discussionmentioning

confidence: 98%

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Species-Specific Interactions of Bacillus Innocula and Arbuscular Mycorrhizal Fungi Symbiosis with Winter Wheat

et al. 2020

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Arbuscular mycorrhizal (AM) fungi establish close interactions with host plants, an estimated 80% of vascular plant species. The host plant receives additional soil bound nutrients that would otherwise not be available. Other components of the microbiome, such as rhizobacteria, may influence interactions between AM fungi and the host plant. Within a commercial arable crop selected rhizobacteria in combination with AM fungi may benefit crop yields. The precise nature of interactions between rhizobacteria and AM fungi in a symbiotic relationship overall requires greater understanding. The present study aims to assess this relationship by quantifying: (1) AM fungal intracellular root structures (arbuscules) and soil glomalin as an indicator of AM fungal growth; and (2) root length and tiller number as a measure of crop growth, in response to inoculation with one of three species of Bacillus: B. amyloliquefaciences, B. pumilis, or B. subtilis. The influence of soil management, conventional (CT) or zero tillage (ZT) was a further variable evaluated. A significant (p < 0.0001) species-specific impact on the number of quantifiable AM fungal arbuscules was observed. The inoculation of winter wheat (Triticum aestivum) with B. amyloliquefaciences had a positive impact on AM fungal symbiosis, as indicated by an average of 3226 arbuscules per centimetre of root tissue. Bacillus subtilis increased root length significantly (p < 0.01) but decreased fungal symbiosis (p < 0.01). The inoculation of field soils altered the concentration of glomalin, an indicator of AM fungal growth, significantly (p < 0.00001) for each tillage treatment. The greatest increase was associated with B. amyloliquefaciences for both CT (p < 0.0001) and ZT (p < 0.00001). Bacillus subtilis reduced measured glomalin significantly in both tillage treatments (p < 0.0001 and p < 0.00001 for CT and ZT respectively). The interaction between rhizobacteria and AM fungi is variable, being beneficial or detrimental depending on species. This relationship was evident in both tillage treatments and has important implications for maximizing symbiosis in the crop plant-microbiome present in agricultural systems.

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Section: Discussioncontrasting

confidence: 90%

Section: Discussionmentioning

confidence: 98%

Species-Specific Interactions of Bacillus Innocula and Arbuscular Mycorrhizal Fungi Symbiosis with Winter Wheat

et al. 2020

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“…impaired the growth of Phytophthora sojae, which causes the soybean damping-off disease (Tehrani et al, 2002). Interestingly, the dual application of Bacillus pumilus and the mycorrhizal fungus Glomus mosseae improved the growth of mandarin plants, directly attributed in part to growth inhibition of fungal pathogens by rhizobacterial volatiles (Chakraborty et al, 2011). The volatiles 1-octen-3-ol, benzothiazol, and citronellol produced by Paenibacillus polymyxa strongly inhibited mycelial growth and impaired germination of eight fungal pathogens, including Botrytis cinerea (Zhao et al, 2011).…”

Section: Influence Of Bacterial Volatiles On Germination and Mycelialmentioning

confidence: 99%

Volatile Mediated Interactions Between Bacteria and Fungi in the Soil

et al. 2012

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Soil is one of the major habitats of bacteria and fungi. In this arena their interactions are part of a communication network that keeps microhabitats in balance. Prominent mediator molecules of these inter- and intraorganismic relationships are inorganic and organic microbial volatile compounds (mVOCs). In this review the state of the art regarding the wealth of mVOC emission is presented. To date, ca. 300 bacteria and fungi were described as VOC producers and approximately 800 mVOCs were compiled in DOVE-MO (database of volatiles emitted by microorganisms). Furthermore, this paper summarizes morphological and phenotypical alterations and reactions that occur in the organisms due to the presence of mVOCs. These effects might provide clues for elucidating the biological and ecological significance of mVOC emissions and will help to unravel the entirety of belowground' volatile-wired' interactions.

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“…All these isolates solubilized phosphate and produced siderophores in vitro. Application of B. pumilus along with G. mosseae in the rhizosphere of Citrus plants led to an increase in growth of seedlings in terms of increase in plant height and number of leaves(Chakraborty et al, 2011) Acharya et al (2013). reported soil application and foliar spray of PGPR to be effective in promoting overall growth of Sualu plants, as well as a increase in the level of defense-related enzymes, phenols and protein in the leaves of treated plants.…”

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confidence: 99%

PGPR in Managing Root Rot Disease and Enhancing Growth in Mandarin (Citrus reticulata Blanco.) Seedlings

Chakraborty,

Allay,

Chakraborty

et al. 2016

J. Hortic. Sci.

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Decline in general plant-health and fruit production in mandarin influenced by abiotic and biotic factors is a major threat to cultivars grown in Darjeeling and Sikkim hills. Fusarium root rot, caused by F. oxysporum, is one of the most serious diseases afflicted during early plant growth stage in Citrus. To address this, seven PGPR isolates - Pseudomonas poae (RMK03), Bacillus stratosphericus (RHS/CL-01), Ochrobactrum anthropi, Paenibacillus lentimorbus, Bacillus pumilus, Bacillus megaterium and Bacillus amyloliquefaciens were isolated from the rhizosphere of Citrus reticulata, C. limonia and Camellia sinensis, and used for evaluating their effect on growth of mandarin seedlings. Pseudomonas poae showed in vitro antagonism to Fusarium oxysporum. Better growth enhancement was noticed with P. poae, B. stratosphericus, O. anthropi and B. pumilus. Enhanced activity of chlorophyll, total protein, phenol, four major defense enzymeschitinase, β-1, 3-glucanase, peroxidase and phenyalanine ammonia lyase was observed upon application of PGPR. P. poae also suppressed root rot caused by Fusarium oxysporum. Use of PGPR, which promote growth besides reducing disease severity to some extent, may lead to use of eco-friendly approaches for controlling plant diseases.

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Dual Application of Bacillus Pumilus and Glomus Mosseae for Improvement of Health Status of Mandarin Plants

Cited by 6 publications

References 0 publications

Species-Specific Interactions of Bacillus Innocula and Arbuscular Mycorrhizal Fungi Symbiosis with Winter Wheat

Species-Specific Interactions of Bacillus Innocula and Arbuscular Mycorrhizal Fungi Symbiosis with Winter Wheat

Volatile Mediated Interactions Between Bacteria and Fungi in the Soil

PGPR in Managing Root Rot Disease and Enhancing Growth in Mandarin (Citrus reticulata Blanco.) Seedlings

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