Influence of the soil atmosphere on spread of Ophiobolus graminis along wheat roots

Ferraz, J. F. P.

doi:10.1016/s0007-1536(73)80147-0

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1979

2021

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Cited by 5 publications

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“…Thus, the beneficial effect of high soil moisture on yield of infected plants could be associated with the inhibiting effect of higher COo concentration on the pathogen. According to FERRAZ (1973) it is, however, unlikely that carbon dioxide accumulates to a fungistatic level and the fungistatic action is ascribed to the bicarbonate ion rather than to undissociated COo.…”

Section: Discussionmentioning

confidence: 99%

Influence of Soil Moisture, Soil Acidity and Nitrogen Source on Take-all of Wheat

Trolldenier

1981

J Phytopathol

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Section: Discussionmentioning

confidence: 99%

Influence of Soil Moisture, Soil Acidity and Nitrogen Source on Take-all of Wheat

Trolldenier

1981

J Phytopathol

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Microorganisms in the rhizosphere of wheat colonized by the fungusGaeumannomyces graminis var.tritici

et al. 1979

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The population of microorganisms in wheat rhizosphere changed in the presence of the fungus Gaeumannomyces graminis var. tritici causing the take-all of wheat. In the majority of cases when the soil was artificially contaminated by the fungus, both the number of bacteria in the rhizosphere and the bacteria/fungi ratio temporarily increased. At the beginning bacteria growing in the presence of NH4+ predominated, later bacteria utilizing organic N-substances prevailed. Pseudomonas fluorescens and the related species colonized the rhizosphere and the soil to a greater extent in the presence of G. graminis. The wheat rhizosphere with G. graminis was found to contain a higher level of the slime-producing bacterium Agrobacterium spp.; this microorganism occurred on hyphal surfaces (in hyphosphere) of both G. graminis growing in soil and Mucor spp. Changes in microbial populations in the wheat rhizosphere during the first stage of colonization by G. graminis can be partly explained by a simultaneous rhizosphere colonization by microorganisms which accompany this fungus in soil. In the period of increase in the number of bacteria in rhizosphere a temporary stimulation of wheat growth was observed.

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1981

Soil Fungi and Soil Fertility

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Influence of the soil atmosphere on spread of Ophiobolus graminis along wheat roots

Cited by 5 publications

References 9 publications

Influence of Soil Moisture, Soil Acidity and Nitrogen Source on Take-all of Wheat

Influence of Soil Moisture, Soil Acidity and Nitrogen Source on Take-all of Wheat

Microorganisms in the rhizosphere of wheat colonized by the fungusGaeumannomyces graminis var.tritici

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