Influence of Plant Species and Plant Age on the Rhizosphere Microflora

Martin, J.K.

doi:10.1071/bi9711143

Cited by 35 publications

(16 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the field experiment the rhizosphere effect of pea was most pronounced at the time of flowering. The rhizosphere effect of microorganisms generally increases with plant age, resulting in a peak at the height of vegetative development and declining with root senescence [2, 28].…”

Section: Discussionmentioning

confidence: 99%

Nematophagous fungi in the rhizosphere of agricultural crops

Persmark

Jansson

2006

FEMS Microbiology Ecology

View full text Add to dashboard Cite

In a field experiment the rhizosphere effect of barley, pea and white mustard on the nematode‐trapping fungi were investigated throughout a growing season. The densities of nematode‐trapping fungi were slightly increased in the rhizospheres compared to the root‐free soil. Pea rhizosphere had the greatest numbers of species of nematophagous fungi with an average of 2.4 species recovered from 0.1 g material, and in white mustard and barley rhizospheres and root‐free soil less than 1.7 species were recovered from 0.1 g. Arthrobotrys oligospora was the most common species in both soil and rhizosphere. In a pot experiment the rhizosphere effect of pea and barley on nematophagous fungi was investigated in 5 different agricultural soils. Pea rhizosphere increased the densities of nematode‐trapping fungi, and up to 780 propagules of nematode‐trapping fungi g−1 rhizosphere soil were found, which was around 19 times higher than in the root‐free soil. The number of nematodes were 6–290 times higher in the pea rhizosphere than in the root‐free soil. Barley rhizosphere had little effect on the densities of nematode‐trapping fungi, while the number of nematodes increased by 3–13 times. The most commonly detected species were A. oligospora, Stylopage sp. and network‐forming Monacrosporium species, but there were no big differences in the species composition between the rhizosphere and the root‐free soil.

show abstract

Section: Discussionmentioning

confidence: 99%

Nematophagous fungi in the rhizosphere of agricultural crops

Persmark

Jansson

2006

FEMS Microbiology Ecology

View full text Add to dashboard Cite

show abstract

“…Differences in patterns of root exudation and rhizodeposition in soil by different plant species (Rovira, 1969), apparently result in differential effects of plant species on the population structure in the rhizosphere (Martin, 1971;Parkinson et al, 1963), an effect which has also been demonstrated between cultivars of the same species (Liljeroth and Baath, 1988) or even isolines differing in one chromosome pair (Neal et al, 1973). These studies all utilised inherently selective cultural methods for assessing the microbial population structures.…”

Section: Introductionmentioning

confidence: 99%

Microbial biomass and mineral N transformations in soil planted with barley, ryegrass, pea or turnip

Wheatley¹,

Ritz²,

Griffiths³

1990

Plant Soil

View full text Add to dashboard Cite

Plants of barley (Hordeum vulgare), ryegrass (Lolium perenne), pea (Pisum sativum) or turnip (Brassica campestris rapifera) were grown in pots of unfertilised soil for 10 weeks together with unplanted control pots. A wide range of soil microbiological parameters was measured on bulk soil samples 2, 4, 7 and 10 weeks after seedlings were transplanted. There was no effect of planting or differential effect of plant species upon respiration rate, microbial biomass N, or biomass of microbial predators, but these parameters all varied significantly over time. Respiration, biomass N and nematode biomass all increased, whilst protozoan biomass decreased. Microbial biomass C showed no significant temporal changes or effect of planting. There was evidence for differential plant effects on potential nitrification and denitrification. Nitrification rates were depressed, compared with the fallow, in all treatments except the pea, at some time in the experiment. Conversely denitrification rates were enhanced in all treatments, except the grass, at specific times. Denitrification rates were greater in the pea treatment than the fallow on all occasions. These results demonstrate that plants do not necessarily influence the gross microbiology of the soil, but may affect physiologically distinct sub-components of the microbial biomass.

show abstract

“…(2) There was a steady or decreasing release of 14 0 from wheat and clover pots from 10 to 18 weeks even though there was marked decomposition of the root systems of these plants in this period (Martin 1971).…”

Section: (C) Origin Of 14c-labelled Materials Leached From Potsmentioning

confidence: 99%

“…A parallel experiment to study the influence of plant species on microbial numbers in the rhizosphere (Martin 1971) gave the following values for the number of bacteria which grew on soil extract agar, present in leachates 9 weeks from seeding: A single dosage of 14 002 (100 /LOi/pot) was supplied to three pots from each treatment. The pots were leached 6 days later and then at eight intervals each of 1 week, corresponding to weeks 10-17 in Figure 1.…”

Section: (A) Release Of 140-labelled Materials From Potsmentioning

confidence: 99%

“…This paper reports the amount and nature of the water soluble 140-labelled material leached from pots containing one of three plant species (wheat, ryegrass, or clover) growing in an agricultural sand, following exposure of the plant tops to 14 002. The interaction between growth of the different plant species and microorganisms is considered separately (Martin 1971).…”

mentioning

confidence: 99%

See 1 more Smart Citation

14c-Labelled Material Leached From the Rhizosphere of Plants Supplied with 14co2

Martin¹

1971

Aust. Jnl. Of Bio. Sci.

Self Cite

View full text Add to dashboard Cite

Abstract14C, supplied to plant tops as 14C02, was recovered in water-soluble organic material when pots with wheat, clover, or ryegrass growing in a podzolic sand were leached with distilled water at weekly intervals following exposure to 14C02. Similar material was recovered from unplanted controls. Percentage recoveries of total 14C supplied were ryegrass 0·41, clover 0,30, wheat 0,19, control 0·14. 14C was leached from all pots at a steady rate up to 10 weeks following cessation of exposure to 14C02.14C was not detected in such compounds as sugars or amino acids and fractionation with Sephadex gels and ultrafiltration indicated a molecular weight distribution of not less than 700 to more than 10,000. 14C was strongly retained by anion-exchange resin and was probably associated with components ofthe fulvic acidhumic acid complex.The evidence did not favour 14C in leachates arising directly from the metabolism or decomposition of roots. It is proposed that 14C was incorporated into soil microflora by assimilation of organic compounds released from roots or by heterotrophic fixation of CO 2, with subsequent release following metabolism or death or both of individual cells.Defoliation of ryegrass previously exposed to 14C02 increased the amount of 14C in leachates, with more than 20% apparently contained in polysaccharides.

show abstract

Influence of Plant Species and Plant Age on the Rhizosphere Microflora

Cited by 35 publications

References 6 publications

Nematophagous fungi in the rhizosphere of agricultural crops

Nematophagous fungi in the rhizosphere of agricultural crops

Microbial biomass and mineral N transformations in soil planted with barley, ryegrass, pea or turnip

14c-Labelled Material Leached From the Rhizosphere of Plants Supplied with 14co2

Contact Info

Product

Resources

About