Accumulation and localization of aluminium in root tips of loblolly pine seedlings and the associated ectomycorrhiza <i>Pisolithus tinctorius</i>

Moyer-Henry, K. A.; Silva, I.; MacFall, Janet S.; Johannes, Eva; Allen, Nina S.; Goldfarb, Barry; Rufty, Thomas W.

doi:10.1111/j.1365-3040.2004.01240.x

Cited by 27 publications

(20 citation statements)

References 62 publications

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“…However, the significant differences in foliar Al levels between nonmycorrhizal and Pisolithusinoculated plants indicate that mycorrhizal structures may have limited Al penetration into the root symplasm and subsequent transport to the shoot [11,25]. Binding of Al to the fungal cell walls represented a substantial fraction of the metal accumulated by Pisolithus mycorrhizas on Eucalyptus [9] and Pinus [26] and may well be part of the mechanism by which ECM Eucalyptus tolerated the high levels of the metal in spoil in the current study. In addition, studies with Pisolithus and other ECM fungi have highlighted a role for Al detoxification within the fungal vacuole with S-rich substrates or P-rich granules [12][13][14]27] and the capacity of Pisolithus mycelia to produce low molecular-weight organic acids that bind Al and prevent its absorption [4,25,28].…”

Section: Discussionmentioning

confidence: 99%

Aluminum-TolerantPisolithusEctomycorrhizas Confer Increased Growth, Mineral Nutrition, and Metal Tolerance toEucalyptusin Acidic Mine Spoil

Egerton‐Warburton

2015

Applied and Environmental Soil Science

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Ectomycorrhizal fungi (ECM) may increase the tolerance of their host plants to Al toxicity by immobilizing Al in fungal tissues and/or improving plant mineral nutrition. Although these benefits have been demonstrated in in vitro (pure culture) or shortterm nutrient solution (hydroponic) experiments, fewer studies have examined these benefits in the field. This study examined the growth, mineral nutrition, and Al levels in two Eucalyptus species inoculated with three Pisolithus ecotypes that varied in Al tolerance (in vitro) and grown in mine spoil in the greenhouse and field. All three ecotypes of Pisolithus improved Eucalyptus growth and increased host plant tolerance to Al in comparison to noninoculated plants. However, large variations in plant growth and mineral nutrition were detected among the Pisolithus-inoculated plants; these differences were largely explained by the functional properties of the Pisolithus inoculum. Seedlings inoculated with the most Al-tolerant Pisolithus inoculum showed significantly higher levels of N, P, Ca, Mg, and K and lower levels of Al than seedlings inoculated with Al-sensitive ecotypes of Pisolithus. These findings indicate an agreement between the fungal tolerance to Al in vitro and performance in symbiosis, indicating that both ECM-mediated mineral nutrient acquisition and Al accumulation are important in increasing the host plant Al tolerance.

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Section: Discussionmentioning

confidence: 99%

Aluminum-TolerantPisolithusEctomycorrhizas Confer Increased Growth, Mineral Nutrition, and Metal Tolerance toEucalyptusin Acidic Mine Spoil

Egerton‐Warburton

2015

Applied and Environmental Soil Science

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“…The toxicity level of aluminium is also modified by occurrence of ectomycorrhizae (Moyer-Henry et al 2005). Seedlings grown in the variant with a higher dose of aluminium were characterised by higher frequency of ectomycorrhizae and lower frequency of ectendomycorrhizae than in the control variant.…”

Section: Discussionmentioning

confidence: 99%

“…Seedlings grown in the variant with a higher dose of aluminium were characterised by higher frequency of ectomycorrhizae and lower frequency of ectendomycorrhizae than in the control variant. Study conducted by Moyer-Henry et al (2005) shows that the tolerance to aluminium of pine seedlings is associated both with the removal of aluminium from the apical part of the root and absorbing it in the peripheral areas, in cells outside the meristem, as well as with the accumulation of aluminium in the hyphae of the mycelium and in the Hartig net area of lateral roots colonised by mycorrhizal fungi (Pisolithus tinctorius). Clearly, more numerous occurrences of ectomycorrhizae than ectendomycorrhizae in seedlings from the variant with a higher dose of aluminium compared with the control may suggest that the presence of aluminium at lower pH of the soil determines the occurrence of ectendomycorrhizal and ectomycorrhizal fungi.…”

Section: Discussionmentioning

confidence: 99%

“…They could therefore be classified as the so-called aluminium accumulators or tolerant to high concentrations of aluminium in the soil due to the numerous mechanisms of adaptation to grow under the harmful influence of this nutrient (Filipek 1994, Gruba 2004, Moyer-Henry et al 2005. Research results of Moyer-Henry et al (2005) clearly indicate that pine seedlings (Pinus taeda L.) are highly resistant to Al, and the elongation growth of primary root is not reduced until the concentration of Al 3+ is close to 40 μmol L -1 . This growth was reduced only by 30% when activity of Al 3+ reached 580 μmol L -1 .…”

Section: Discussionmentioning

confidence: 99%

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lmpact of aluminium sulphate fertiliser on selected soil properties and the efficiency and quality of pine seedlings in the forest ground tree nursery

Januszek

Stępniewska

Błońska

et al. 2014

Forest Research Papers

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Abstract. The alkalisation of soil is a common phenomenon in forest ground nurseries. Liming, inadequate fertilisation and the use of hard water for irrigation are the main reasons for this alkalisation. The aim of this study was to investigate the effect of fertilisation with aluminium sulphate on soil pH, the activity of selected soil enzymes, efficiency as well as the growth parameters of pine seedlings.The study was conducted in a forest nursery, on a plot with soil pH 6.4 in water and 5.9 in 1M KCl. Such a pH is not conducive to the production of conifer seedlings, particularly pines. Two different doses of aluminium sulphate fertiliser were applied: 740 kg ha -1 and 1110 kg haBoth doses significantly reduced the soil pH, whereas soil enzyme activity did not change. The lower dose had a positive impact on the growth parameters of pine seedlings, while the higher dose led to their deterioration. We observed statistically significant differences in average primary and lateral root lengths, number of short roots, and thickness of the neck root of seedlings. One-and 2-year-old seedlings did not show symptoms of nutrient deficiency and neither did concentrations of the investigated macronutrients and selected micronutrients in needles indicate such. After applying the higher fertiliser dose, we observed a favourable change in the composition of mycorrhizae. Out of the potential seedling pathogens we found Cylindrocarpon spp., Fusarium spp.,Phytophthora spp., Pythium spp. and Rhizoctonia solani of which the most frequent were Fusarium oxysporom, Pythium spp. and R. solani. Their occurrence frequency differed between the treatments used in this experiment.This study confirms the positive effects of a low aluminium dose on the performance and growth parameters of pine seedlings. However, on the basis of the conducted experiments, it is difficult to say, whether this positive effect is due to a direct action of aluminium on the seedlings or rather an indirect effect caused by lowering the soil pH, which in tum impacts on mycorrhizae composition and hence pathogen development.

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“…This is also the case when trees take up Ca for cell wall building. For a mycorrhiza fungi associated with loblolly pine, the capability to transport Al has been demonstrated [91]. In site class B, a significant increase in exchangeable Al stocks in the organic layer was detected (ZAM , Table S4) together with the lowest soil pH (Table S1).…”

Section: Effects Of Soils On Forest Productivitymentioning

confidence: 95%

Forest Site Classification in the Southern Andean Region of Ecuador: A Case Study of Pine Plantations to Collect a Base of Soil Attributes

Quichimbo

Jiménez

Veintimilla

et al. 2017

Forests

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Forest site classification adapted to the respective site conditions is one prerequisite for sustainable silviculture. This work aims to initiate the forest site classification for pine plantations in the southern Andean region of Ecuador. Forest productivity, estimated by the dominant height of 20-year-old trees (DH 20 ), was related to data from climate, topography, and soil using 23 plots installed in pine plantations in the province of Loja. Forest site productivity was classified as: low (class C: 13.4 m), middle (class B: 16.6 m), and high (Class A: 22.3 m). Strong determinants to differentiate the forest site classes were: the short to medium term available Ca and K stocks (organic layer + mineral soil standardized to a depth of 60 cm), soil acidity, the C:N ratio, clay and sand content, forest floor thickness, altitude, and slope. The lowest forest productivity (Class C) is mainly associated with the lowest short to medium term available K and Ca stocks. Whereas, in site classes with the highest forest productivity, pines could benefit from a more active microbial community releasing N and P, since the soil pH was about 1 unit less acidic. This is supported by the lowest forest floor thickness and the narrowest C:N ratio.

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Accumulation and localization of aluminium in root tips of loblolly pine seedlings and the associated ectomycorrhiza Pisolithus tinctorius

Cited by 27 publications

References 62 publications

Aluminum-TolerantPisolithusEctomycorrhizas Confer Increased Growth, Mineral Nutrition, and Metal Tolerance toEucalyptusin Acidic Mine Spoil

Aluminum-TolerantPisolithusEctomycorrhizas Confer Increased Growth, Mineral Nutrition, and Metal Tolerance toEucalyptusin Acidic Mine Spoil

lmpact of aluminium sulphate fertiliser on selected soil properties and the efficiency and quality of pine seedlings in the forest ground tree nursery

Forest Site Classification in the Southern Andean Region of Ecuador: A Case Study of Pine Plantations to Collect a Base of Soil Attributes

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