Growth responses of several plant species to mycorrhizae in a soil of moderate P-fertility

Plenchette, Christian; Fortin, J. A.; Furlan, V.

doi:10.1007/bf02374781

Cited by 135 publications

(94 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The rate of infection decreased with increasing applied P for barley and only for the highest rate of application for soybean. These observations reflect the low and high mycorrhizal dependency of barley and soybean, respectively (Plenchette et al, 1983). In the nil P treatment the rates of AM infection of barley and soybean were similar, but AM infection increased P uptakes 4.5 and 1.4 fold for soybean and barley, respectively (Table 2).…”

Section: Resultsmentioning

confidence: 72%

Is the isotopically exchangeable phosphate of a loamy soil the plant-available P?

Morel¹,

Plenchette²

1994

Plant Soil

Self Cite

View full text Add to dashboard Cite

This study compared the validity of using the isotopically exchangeable phosphorus (P) as an accurate measurement of plant available P by comparing the specific activity of P, i.e. the 32P/31P ratio, in soil solution (Ss) against the specific activity of P in plants (Sp) growing in a loamy soil after applying a 32P-labelled fertilizer (NaH,P0,2H,O) at different rates (F) and specific activities (Sf). Non-mycorrhizal and mycorrhizal (Glomus intraradices) plants of two species (soybean and barley) were grown in greenhouse experiments. Ss values were determined on 1: 10 soil suspension after periods of incubation ranged from 1 min to 35 d. At a given rate of P application, the Sp values of both non-mycorrhizal and mycorrhizal soybean and barley did not show significant difference although the plant P uptake varied 18 fold for all the (crop species x mycorrhizal infection) treatments over soil solution P values ranging from 0.02 to 5.46 mg P L-l (0.6-176 pA4). Ss values decreased with time and reached a steady state after 35 d of equilibration period. Both SpiSf and Ss/Sf increased with applied P and there is a 1: 1 correspondence between Sp/Sf and Ss/Sf values. The identity between the isotopic composition of both P in soil solution and in plant indicates that the isotopically exchangeable P (E = F(Sf/Ss-1)) is the only source of phosphate in solid soil phase which replenishes P of the soil solution after P has been removed by the plant, i.e. the only source of P which participates in plant nutrition. The isotopically exchangeable P of a loamy soil is the P available to growing plants and mycorrhizal fungi increases the P uptake giving plants wider access to isotopically exchangeable P in soil, and not making previously non-exchangeable P available. An immediate application of the 1: 1 correspondence between a soil parameter (Ss/Sf) and a plant parameter (Sp/Sf) concerns the agronomic evaluation of P fertilizers.Abbreviations: R -amount of 32P associated with the amount of 31P (F) in fertilizer, Rp -amount of 32P taken up by plant, Rs -amount of 32P in soil solution, Qf -amount of 31P taken up by plant from the fertilizer (Qf = FRp/R), Qs -amount of 31P taken up by plant from the soil, Qt -total amount of 31P taken up by plant (Qt = Qs + Qf), Wf -amount of 31P in soil solution derived from the fertilizer (Wf = FRs/R), Ws -amount of 31P in soil solution originated from the soil, Wt -total amount of 3*P in soil solution (Wt = Ws + Wf), Sf -specific activity of P in the applied fertilizer (Sf = R/F), Ss -specific activity of P in the soil solution (Ss = Rs/Wt), Sp -specific activity of P taken up by the plant (Sp = Rp/Qt). A value -FQs/Qf, L value -F(Sf/Sp-1), E value -F(Sf/Ss-1).

show abstract

Section: Resultsmentioning

confidence: 72%

Is the isotopically exchangeable phosphate of a loamy soil the plant-available P?

Morel¹,

Plenchette²

1994

Plant Soil

Self Cite

View full text Add to dashboard Cite

show abstract

“…In conclusion, the overall results highlight the difficulties in generalization about the performance of mycorrhizal plants from results obtained for a single plant species (Michelsen and Rosendahl 1990), and even from different species within one genus (Plenchette et al 1983), mainly when the objective is the massive seedling production for reforestation (Caravaca et al 2003;Cuenca et al 2002). Long-term studies should be carried out in order to understand the role that AMF and root nodules (e.g.…”

Section: Discussionmentioning

confidence: 88%

“…The relative field mycorrhizal dependency (RFMD) index was calculated as: RFMD = [(dry weight mycorrhizal plant) -(dry weight non-mycorrhizal plant)]/dry weight mycorrhizal plant (Corkidi and Rincón 1997;Kahiluoto et al 2001;Plenchette et al 1983;Zangaro et al 2007). The mycorrhizal dependency is the degree to which a plant relies upon the mycorrhizal condition to produce its maximum growth at a given level of soil fertility (Plenchette et al 1983). Dried shoots were ground to a fine powder and subjected to a mixed di-acid digestion, and P content was determined colorimetrically according to Gericke and Kurmies (1952).…”

Section: Measurements and Laboratory Analysismentioning

confidence: 99%

See 1 more Smart Citation

Effect of mycorrhizae on seedlings of six endemic Mimosa L. species (Leguminosae–Mimosoideae) from the semi-arid Tehuacán–Cuicatlán Valley, Mexico

Camargo‐Ricalde

Montaño

Reyes-Jaramillo

et al. 2009

Trees

View full text Add to dashboard Cite

Mimosa is an important genus of legumes in arid and semi-arid ecosystems of the world, but scarce information is available about its interaction with microbial symbionts. In Mexico, there are no reports on the responsive of endemic Mimosa species to arbuscular mycorrhizal (AM) fungal colonization. In this study, the AM association with seedlings of six endemic Mimosa species, M. adenantheroides, M. calcicola, M. lacerata, M. luisana, M. polyantha and M. texana var. filipes, is reported. Field conditions were simulated in the greenhouse. Seeds were collected from plants and soil from the localities where the species occur within the semi-arid Tehuacán-Cuicatlán Valley, Mexico. Four treatments were applied: (1) control, (2) benomyl, (3) phosphorus, and (4) benomyl plus phosphorus. Mycorrhizal seedlings of five species, M. adenantheroides, M. lacerata, M. luisana, M. polyantha and M. texana var. filipes, showed a higher shoot and total dry weight than non-mycorrhizal seedlings. The only species that did not show any difference between mycorrhizal and non-mycorrhizal seedling performance was M. calcicola. M. luisana, M. polyantha and M. texana var. filipes had a higher root/shoot ratio; in general, benomyl treatments promoted seedling biomass allocation to the root, while control, phosphorus and benomyl plus phosphorus treatments decrease root/shoot ratio. Shoot P content was significantly higher in mycorrhizal than in non-mycorrhizal plants, although no significant differences were found for M. adenantheroides in all treatments. Benomyl and benomyl plus phosphorus treatments reduced AM colonization in all the species under study. Benomyl significantly reduced the number of N 2 -fixing root nodules, while the phosphorus treatment generally stimulated nodulation. The species M. lacerata, M. luisana, M. polyantha and M. texana var. filipes had a high mycorrhizal dependency index indicating that plant growth was strongly increased by arbuscular mycorrhiza activity. Our results indicate that the response of all Mimosa species to mycorrhization was highly variable. To our knowledge, this is the first report about the effect of AM fungi and phosphorus on Mimosa species, which may be useful in biodiversity and soil conservation programs.

show abstract

“…Again the results have been contradictory. Removing VAM had no marked effect in several studies (Buwalda et al 1985;Jakobsen 1986;Fitter 1986) whilst in another up to a 100-fold decrease in production was noted (Planchette et al 1983). …”

Section: Benomyl -Vulpia Ciliatamentioning

confidence: 99%

A field study using the fungicide benomyl to investigate the effect of mycorrhizal fungi on plant fitness

1992

View full text Add to dashboard Cite

The effect of vesicular-arbuscular mycorrhiza (VAM) on the fecundity ofVulpia ciliata ssp.ambigua was investigated at two field sites in eastern England by applying the fungicide benomyl to reduce VAM infection. The application of benomyl at the two sites produced very different results. At one site the application of the fungicide reduced the fecundity of plants whereas at the other fecundity was increased. At the first site the reduction in fecundity was linked to a significant reduction in VAM infection on the sprayed plants. The mechanism of the benefit associated with the VAM infection is however unclear: there was no treatment effect on morphology or on phosphorus inflow. At the second site, where fecundity was increased, there was only a negligible amount of VAM infection amongst the unsprayed plants and it is suggested that the increase in fecundity with the application of benomyl may have resulted from a reduction in infection by other, presumably pathogenic, fungi. The value of VAM fungi to the host plant may therefore not be restricted to physiological benefits. They may also provide protection to the plant by competing for space with other species of pathogenic fungi.

show abstract

Growth responses of several plant species to mycorrhizae in a soil of moderate P-fertility

Cited by 135 publications

References 14 publications

Is the isotopically exchangeable phosphate of a loamy soil the plant-available P?

Is the isotopically exchangeable phosphate of a loamy soil the plant-available P?

Effect of mycorrhizae on seedlings of six endemic Mimosa L. species (Leguminosae–Mimosoideae) from the semi-arid Tehuacán–Cuicatlán Valley, Mexico

A field study using the fungicide benomyl to investigate the effect of mycorrhizal fungi on plant fitness

Contact Info

Product

Resources

About