Organic amendments to soil inoculated arbuscular mycorrhizal fungi and Pseudomonas fluorescens treatments reduce the development of root-rot disease and enhance the yield of Phaseolus vulgaris L.

Neeraj, ..; Singh, Kuldeep

doi:10.1016/j.ejsobi.2011.07.002

Cited by 56 publications

(21 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…frozen soils, short plant growing season) exert a strong selection pressure on plant communities and their associated microorganisms. As AMF from different taxa have shown functional complementarity (Koide, ) for P uptake (Smith et al ., ), biomass increase (Van der Heijden et al ., ), and disease control (Neeraj and Singh, ), whether or not the change in AMF taxa at the highest altitude has ecological significance for the adaptation of both plant species deserves further investigation.…”

Section: Discussionmentioning

confidence: 99%

Contribution of arbuscular mycorrhizal fungi of sedges to soil aggregation along an altitudinal alpine grassland gradient on theTibetanPlateau

Zhang

Gai

et al. 2015

Environmental Microbiology

View full text Add to dashboard Cite

The diversity of arbuscular mycorrhizal fungi (AMF) in sedges on the Tibetan Plateau remains largely unexplored, and their contribution to soil aggregation can be important in understanding the ecological function of AMF in alpine ecosystems. Roots of Kobresia pygmaea C.B. Clarke and Carex pseudofoetida Kük. in alpine Kobresia pastures along an elevational transect (4149-5033 m) on Mount Mila were analysed for AMF diversity. A structural equation model was built to explore the contribution of biotic factors to soil aggregation. Sedges harboured abundant AMF communities covering seven families and some operational taxonomic units are habitat specific. The two plant species hosted similar AMF communities at most altitudes. The relative abundance of the two sedges contributed largely to soil macroaggregates, followed by extraradical mycorrhizal hyphae (EMH) and total glomalin-related soil protein (T-GRSP). The influence of plant richness was mainly due to its indirect influence on T-GRSP and EMH. There was a strong positive correlation between GRSP and soil total carbon and nitrogen. Our results indicate that mycorrhization might not be a major trait leading to niche differentiation of the two co-occurring sedge species. However, AMF contribute to soil aggregation and thus may have the potential to greatly influence C and N cycling in alpine grasslands.

show abstract

Section: Discussionmentioning

confidence: 99%

Contribution of arbuscular mycorrhizal fungi of sedges to soil aggregation along an altitudinal alpine grassland gradient on theTibetanPlateau

Zhang

Gai

et al. 2015

Environmental Microbiology

View full text Add to dashboard Cite

show abstract

“…Nevertheless, such communities seem to exhibit a greater potential for protection (Tchabi et al, 2010). The great diversity of the microbial population present in the mycorrhizosphere (Toljander et al, 2007) also plays an important role in protecting against biotic (Neeraj and Singh, 2011;Siasou et al, 2009) and abiotic stresses (Nogueira and Cardoso, 2002). Despite the complexity of all these interactions, it is recognized that a well-established AM is crucial for an adequate degree of protection (Khaosaad et al, 2007;Garg and Chandel, 2010).…”

Section: Introductionmentioning

confidence: 99%

Managing arbuscular mycorrhizal fungi for bioprotection: Mn toxicity

Brito

Carvalho

Alho

et al. 2014

Soil Biology and Biochemistry

View full text Add to dashboard Cite

a b s t r a c tWe investigated whether an intact extraradical mycelium (ERM) is more effective than other forms of propagule from indigenous arbuscular mycorrhizal fungi (AMF) in providing protection against stress to a host plant. The response of wheat (Triticum aestivum L.) to Mn toxicity was studied in a two-phase greenhouse experiment. In Phase 1, four Mn tolerant species from the natural vegetation, ranging from strongly mycotrophic to non-or weakly mycotrophic, were grown to develop different amounts of ERM. Wheat was then planted (Phase 2) with the ERM fragmented by sieving (Disturbed Treatment) or kept intact with no prior soil disturbance (Undisturbed Treatment). The growth of wheat was doubled by earlier and faster mycorrhizal colonization (AC) in the presence of an intact ERM at planting. There was a positive correlation between plant growth and the reduction of Mn and enhancement of P and S uptake into shoots. However, the growth of plants in undisturbed soil was significantly affected by the ERM developer species, which was not explained by differences in AC. Colonization starting from an intact ERM greatly enhanced the potential of AMF for protection against Mn toxicity. However, the degree of protection depended on the plant previously grown to develop the ERM, suggesting that there may be functional diversity within the ERM developed by mycotrophic plants of the natural vegetation.

show abstract

“…reduce root rot infection through several mechanisms, such as the induction of systemic resistance against phytopathogens in the host plant (Ramamoorthy et al, 2001). As reported in the literature, a bacterial suspension of P. fluorescens can inhibit the growth of Rizoctonia solani mycelia in rhizosphere soils and can also facilitate the colonization of plant roots by arbuscular mycorrhizal fungi (AMF), increasing plant growth and biomass (Neeraj and Singh, 2011). In general, it has been reported that several species of pseudomonads, such as P. fluorescens, P. putida, P. cepacia (Burkholderia cepacia) and P. aeruginosa, isolated from plant tissues or soil, are potential biocontrol agents for several phytopathogenic fungi (Mavrodi et al, 2012).…”

Section: Introductionmentioning

confidence: 90%

The development and suppressive activity of soil microbial communities under compost amendment

Zaccardelli

Nicola

Villecco

et al. 2013

J. Soil Sci. Plant Nutr.

View full text Add to dashboard Cite

Soil is a highly complex system in which bacteria play a dominant role. Soil microorganism biodiversity is extremely important for sustaining the nutrient cycles of soil ecosystems. The diversity of soil bacterial and fungal communities can be influenced by agricultural management. The use of amendments, such as the incorporation of compost into the soil, strongly affects soil microbial communities directly or indirectly. The use of compost can be an important tool to control soil-borne pathogens. Certain groups of microorganisms (bacteria and fungi) present in compost produce metabolites, such as siderophores and antibiotics, with specific suppressive activity against soilborne pathogens: among these compost bacteria, species of Pseudomonas and Bacillus are very important. In this study, we investigated the effects of increasing doses of compost on the density of several cultivable soil microbial groups in an agricultural system of Southern Italy. The number of total bacteria, total fungi, siderophore-producing bacteria (principally Pseudomonas spp.) and spore-forming bacteria (principally Bacillus spp.) was evaluated over a period of five months. Moreover, we analyzed the ability of spore-forming bacteria isolated from soil and compost to inhibit, in vitro, five soil-borne phytopathogenic fungi (Rhizoctonia solani, Fusarium oxysporum, Sclerotinia minor, Fusarium solani, Pyrenochaeta lycopersici). The number of total bacteria and siderophore-producing bacteria was greater in the soil treated with compost than in soils treated with mineral fertilization or not manured, with an increase related to the dose of compost applied. Moreover, the compost used in this study produced a substantial increase in the number of spore-forming bacteria in the soil. Approximately 80% of these bacteria were able to inhibit the soil-borne phytopathogenic fungi Rhizoctonia solani, Fusarium oxysporum, Sclerotinia minor, Fusarium solani and Pyrenochaeta lycopersici. These results show that compost from the organic fraction of municipal solid wastes furnishes a high number of spore-forming bacteria exhibiting antibiotic activity against phytopathogenic fungi. The application of compost can change the composition of the soil microbial community, modifying the relationships among microorganisms, both competitive and/or antagonistic, producing a decrease in the activity of plant pathogens. These results were in agreement with the decrease in the symptoms of disease on tomato plants cultivated in the soils treated in this study.

show abstract

Organic amendments to soil inoculated arbuscular mycorrhizal fungi and Pseudomonas fluorescens treatments reduce the development of root-rot disease and enhance the yield of Phaseolus vulgaris L.

Cited by 56 publications

References 21 publications

Contribution of arbuscular mycorrhizal fungi of sedges to soil aggregation along an altitudinal alpine grassland gradient on theTibetanPlateau

Contribution of arbuscular mycorrhizal fungi of sedges to soil aggregation along an altitudinal alpine grassland gradient on theTibetanPlateau

Managing arbuscular mycorrhizal fungi for bioprotection: Mn toxicity

The development and suppressive activity of soil microbial communities under compost amendment

Contact Info

Product

Resources

About