Source of phosphate taken up from two soils by mycorrhizal (Thelephora terrestris) and non-mycorrhizal Picea sitchensis seedlings

Thomas, G. W.; Clarke, C.; Mosse, Barbara; Jackson, R. M.

doi:10.1016/0038-0717(82)90081-5

Cited by 11 publications

(3 citation statements)

References 11 publications

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“…Thomas et al (1982), using radioactive tracers, could not find differences in P source utilization between control and T. terrestris inoculated Picea sitchensis. Cumming (1993) found that mycorrhizal and non-mycorrhizal Pinus rigida seedlings could not use IHP, supplied at a low concentration (50 µM), as a P source.…”

Section: Discussionmentioning

confidence: 71%

The use of inositol hexaphosphate as a phosphorus source by mycorrhizal and non‐mycorrhizal Scots Pine (Pinus sylvestris)

Colpaert¹,

Laere²,

Tichelen

et al. 1997

Functional Ecology

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Summary 1.The external mycelia of the ectomycorrhizal fungi Thelephora terrestris and Suillus luteus, associated with Pinus sylvestris roots, exhibited a substantial extracellular acid phosphatase activity. The activity was positively correlated with the ergosterol concentration in the growth substratum and decreased with an increasing P nutrition. 2. The pioneer species T. terrestris grew best at a high P i nutrition level whereas S. luteus, a 'late-stage' mycobiont, produced more active biomass at a low P i nutrition level. 3. The phytase activity of the external mycelia could not be detected; at the root surface a phytase activity was observed. Mycorrhizas had significantly higher activities than uninfected roots. 4. The addition of a relatively high concentration of a soluble phytate to the growth substratum resulted in an increased relative growth rate (RGR) in both mycorrhizal and non-mycorrhizal plants. The influence of the mycorrhizal fungi on the use of the phytate-P was small, despite the phytase activity of the mycorrhizal feeder roots. 5. The addition of phytate fixed on a HPLC resin did not result in an increase of the RGR and P uptake neither in the non-mycorrhizal nor in the mycorrhizal Pines. The experiment did not support the hypothesis that phytate, which has a low solubility in soils, is a useful P source for ectomycorrhizal plants.

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Section: Discussionmentioning

confidence: 71%

The use of inositol hexaphosphate as a phosphorus source by mycorrhizal and non‐mycorrhizal Scots Pine (Pinus sylvestris)

Colpaert¹,

Laere²,

Tichelen

et al. 1997

Functional Ecology

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“…The plants in this treatment also received extra N from the ATP, which may have contributed to the improved growth. The trees were able to use glycerophosphate and inorganic pyrophosphate, which are known to provide a P source to plants and mycorrhizae (Bartlett and Lewis 1973;McKercher and Tollefson 1978;Beever and Burns 1980;Thomas et al 1982;Tarafdar and Claasen 1988;Pasqualini et al 1992;Jayachandran et al 1992;Barrett-Lennard et al 1993). Growth was improved with all P sources when they were supplied at the higher rate, and foliar P levels were above deficiency levels with the high rates of orthophosphate, ATP, glycerophosphate, and pyrophosphate (Walker et al 1955).…”

Section: Discussionmentioning

confidence: 96%

Response of mycorrhizal western red cedar to organic phosphorus sources and benomyl

Cade-Menun¹,

Berch²

1997

Can. J. Bot.

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In some British Columbia forests, western red cedar (Thuja plicntn Donn ex D. Don) grows well in soils with phosphorus (P) mainly in organic form and shows less response to P fertilization than other conifers. It was hypothesized that cedar or their associate arbuscular mycorrhizae could mineralize organic P. In a year-long greenhouse study, 2-year-old cedar trees in Turface were fed every 9 days with one of 1 1 P treatments (in Long Ashton solution): no P; high and low phytic acid (for all treatments, high is 50 mg P . L-', and low is 10 mg P . L-'); high and low ATP; high and low glycerophosphate; high and low pyrophosphate; high and low orthophosphate. Ten mycorrhizal trees were used per treatment; of these, five trees per treatment were treated with the fungicide benomyl, which significantly reduced colonization in only two treatments. Growth was good with high rates of glycerophosphate, ATP, and pyrophosphate; low rates of these compounds resulted in P deficiencies. The trees grew poorly with phytic acid, which may have been adsorbed to the Turface, and which may have cornplexed Ca, Zn, and Cu from the nutrient solution, inducing deficiencies. The P source influenced the activities of rhizosphere acid and alkaline phosphatase, but had no significant effect on phosphodiesterase or pyrophosphatase activity. Use of the fungicide benomyl caused a significant increase in foliar N, either directly from the fungicide or indirectly from effects on N cycling.Resume : Dans certaines for&ts de la Colombie Britannique, le thuya gCant (Thujn plicata Donn ex D. Don) pousse bien dans des sols oh le phosphore (P) prevaut sous forme organique, et rCagit moins bien B la fertilisation P que les autres coniEres. Les auteurs ont formu16 l'hypothkse que le thuya ou ses rnycorhizes arbusculaires (AM) associCes pourraient mineraliser le P organique. Les auteurs ont conduit une expCrience en serre qui a durC une annCe en appliquant les traitements suivants : des thuyas 2gCs de 2 ans ont Ct C cultivCs dans du Turface et nourris tous les 9 jours avec 1 des 11 traitenlents P (en solution de Long Ashton) : sans P; acide phytique ClevC et faible (pour tous les traitenlents, haut signifie 50 mg PIL; faible signifie 10 mg PIL); ATP ClevC et faible; glycerophosphate ClevC et faible; pyrophosphate ClevC et faible; orthophosphate ClevC et faible. Pour chaque traitement elles ont utilisC 10 plants dont 5 plants pour chaque traitement ont requ du fongicide bCnomyl, qui n'a rCduit significativement la mycorhization que dans deux traitements. La croissance a Ct C bonne avec des apports ClevCs en glycCrophosphate, ATP et pyrophosphate; les apports faibles en ces composCs ont entrain6 des dCficiences en P. La croissance a Ct C mediocre en presence d'acide phytique, lequel aurait pu Ctre adsorb6 par le Turface, et avoir complex6 le Ca, le Zn et le Cu de la solution nutritive, conduisant ainsi aux dtficiences. La source de P a influencC les activitCs des phosphatases acides et alcalines de la rhizosphkre, mais est demeurCe sans effet sur les activitC...

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“…There are several reports that Tt can increase foliar P, Nand K concentrations in seedlings compared with uninoculated controls or plants inoculated with some other ECM fungi (Thomas et al 1982;Ford et al 1985;Heslin and Douglas 1986;Coleman et al 1990). Rapid P uptake in Tt-colonised willow resulted in a significant increase in P concentration in shoots and roots during the first weeks of colonisation (Jones et al 1991).…”

Section: Nutritional Benefits To the Hostmentioning

confidence: 99%

Thelephora

Colpaert

1999

Ectomycorrhizal Fungi Key Genera in Profile

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Source of phosphate taken up from two soils by mycorrhizal (Thelephora terrestris) and non-mycorrhizal Picea sitchensis seedlings

Cited by 11 publications

References 11 publications

The use of inositol hexaphosphate as a phosphorus source by mycorrhizal and non‐mycorrhizal Scots Pine (Pinus sylvestris)

The use of inositol hexaphosphate as a phosphorus source by mycorrhizal and non‐mycorrhizal Scots Pine (Pinus sylvestris)

Response of mycorrhizal western red cedar to organic phosphorus sources and benomyl

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