Ectomycorrhizal Pisolithus albus inoculation of Acacia spirorbis and Eucalyptus globulus grown in ultramafic topsoil enhances plant growth and mineral nutrition while limits metal uptake

Jourand, Philippe; Hannibal, Laure; Majorel, Clarisse; Mengant, Stéphane; Ducousso, Marc; Lebrun, Michel

doi:10.1016/j.jplph.2013.10.011

Cited by 59 publications

(37 citation statements)

References 31 publications

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“…In this study, all three ecotypes of Pisolithus improved Eucalyptus growth and mineral nutrition (N, P, Ca, Mg, and K) and reduced the transfer to a phytotoxic metal (Al) to the host plant in comparison to nonmycorrhizal seedlings. These trends are in general agreement with earlier studies of ECM plants in metal-contaminated and native soils [3,11,15]. More notably, the experiments revealed that the source of the Pisolithus isolate was the largest influence of plant growth, mineral nutrition, and Al content.…”

Section: Discussionsupporting

confidence: 91%

“…In contrast, plants grown with Pisolithus showed substantial increases in N and P, consistent with the physiological role of ECM in natural forest or Al-treated soils [4,10,25], as well as increased plant Mg, Ca, and K levels. This result suggests that an ECM-mediated uptake of cations might directly ameliorate the effects of Al [4,8,16] in a manner similar to other phytotoxic metals [11,15], or indirectly by enhancing P uptake [30]. Taken together with plant Al levels, these findings suggest that both plant nutrient imbalances and direct Al toxicity are likely the main reasons for the negative effects of mine spoil on plant growth.…”

Section: Discussionmentioning

confidence: 80%

“…Such ECM-mediated metal tolerance has been attributed to various extracellular (chelation, cell-wall binding) or intracellular detoxification mechanisms such as binding to nonprotein thiols or vacuolar storage [1,4,[11][12][13][14]. In other studies, however, the alleviation of Al or heavy metal toxicity by ECM was attributed to improved plant mineral nutrition owing to an increase in the uptake of poorly soluble ions (P) or base cations (Ca, Mg) [4,10,15,16]. Further, the effects of ECM on plant Al tolerance may depend on the identity of the host species or ECMhost combination.…”

Section: Introductionmentioning

confidence: 99%

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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: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

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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 total amounts of Cu applied correspond to 0, 375, 750, 1500, and 3000 mg Cu kg −1 soil. Values are means+SE (n=4-5) alleviate heavy metal stress of plants, by improving nutritional status and reducing metal uptake (Toler et al 2005;Göhre and Paszkowski 2006;Andrade et al 2008;Jourand et al 2014). However, van Tichelen et al (2001 found no difference in Cu concentrations between ECM and NM plants in their control medium.…”

Section: Discussionmentioning

confidence: 99%

Growth and photosynthetic responses of ectomycorrhizal pine seedlings exposed to elevated Cu in soils

et al. 2015

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It is still controversial whether ectomycorrhizal (ECM) mycelia filter out toxic metals in nutrient absorption of host trees. In this study, pine (Pinus densiflora) seedlings colonized by Cu-sensitive and Cu-tolerant ECM species were exposed to a wide spectrum of soil Cu concentrations to investigate functions of ECM fungi under Cu stress. The photosynthetic rates of intact needles were monitored in situ periodically. The biomass and elements of plants were also measured after harvest. The ameliorating effect of ECM infection on host plants exposed to toxic stress was metal concentration specific. Under lower-level Cu stress, ECM fungi increased seedling performance, while ECM seedlings accumulated more Cu than nonmycorrhizal (NM) seedlings. Under higher-level Cu stress, photosynthesis decreased well before visible symptoms of Cu toxicity appeared. The reduced photosynthesis and biomass in ECM seedlings compared to NM seedlings under higher Cu conditions were also accompanied by lower phosphorus in needles. There was no marked difference between the two fungal species. Our results indicate that the two ECM fungi studied in our system may not have an ability to selectively eliminate Cu in nutrient absorption and may not act as effective barriers that decrease toxic metal uptake into host plants.

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“…(2000). According to Hosaka (2009) andJourand &al. (2010) P. albus is also distributed in New Caledonia.…”

Section: Introductionmentioning

confidence: 99%

Pisolithus albus (Sclerodermataceae), a new record for Tunisia

Venturella

Gargano

Compagno³

et al. 2015

Fl. Medit.

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Pisolithus albus was recently collected for the first time in Tunisia. This ectomycorrhizal fungus is found associated with Eucalyptus occidentalis, a new symbiotic relationship, in the urban area of Tunis. The new record of this fungus on this tree permit to expand our knowledge on the ecology and distribution of P. albus in Tunisia. The finding is also important since this fungal symbiont has great potential in forestation efforts. Data on the morphology, molecular identification, distribution and, ecology for P. albus in Tunisia are presented for the first time.

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Ectomycorrhizal Pisolithus albus inoculation of Acacia spirorbis and Eucalyptus globulus grown in ultramafic topsoil enhances plant growth and mineral nutrition while limits metal uptake

Cited by 59 publications

References 31 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

Growth and photosynthetic responses of ectomycorrhizal pine seedlings exposed to elevated Cu in soils

Pisolithus albus (Sclerodermataceae), a new record for Tunisia

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