The effect of ectomycorrhizal fungi on Zn uptake and distribution in seedlings of Pinus sylvestris L

Bücking, Heike; Heyser, Wolfgang

doi:10.1007/bf00007946

Cited by 40 publications

(19 citation statements)

References 24 publications

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“…The copper concentrations in Scots pine needles increased with increasing concentrations of Cu of Zn, Cd, Ni and Pb to shoots of ectomycorrhizal tree seedlings has been reported in many experiments (Jones and Hutchinson 1986, Denny and Wilkins 1987, Dixon 1988, Colpaert and Van Assche 1992, 1993, Bücking and Heyser 1994.…”

Section: +mentioning

confidence: 78%

“…Rühling et al (1984) observed a strong negative correlation between carpophore production of some ectomycorrhizal fungal genera and the Cu concentration in the soil organic layer around a zinc-copper smelter in south-eastern Sweden. Several laboratory studies have demonstrated that ectomycorrhizal (ECM) fungi can protect tree seedlings against heavy metal toxicity (Jones and Hutchinson 1986, 1988, Denny and Wilkins 1987, Colpaert and Van Assche 1992, Bücking and Heyser 1994, Marschner et al 1996. The ameliorating effect of ECM fungi has been attributed to reduced translocation of heavy metals to the host plant (Leyval et al 1997), although mycorrhizal-induced increases in nutrient uptake can also alleviate heavy metal stress in highly mycotrophic tree species.…”

Section: Introductionmentioning

confidence: 99%

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Nutrient uptake by intact mycorrhizal Pinus sylvestris seedlings: a diagnostic tool to detect copper toxicity

1999

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SummaryWe developed a nondestructive method for detecting early toxic effects of sublethal copper (Cu) concentrations on ectomycorrhizal and non-mycorrhizal (NM) Scots pine (Pinus sylvestris L.) seedlings. The fungal symbionts examined were Paxillus involutus (Fr.) Fr., Suillus luteus (Fr.) S.F. Gray and Thelephora terrestris (Ehrh.) Fr. The accumulation of Cu in needles and fungal development (ergosterol) in roots and substrate were assessed. Inorganic phosphate (P i ) and ammonium (NH 4 + ) uptake capacities were determined in a semi-hydroponic cultivation system on intact P-limited plants that were exposed for 3 weeks to 0. Mycorrhizal plants consistently had higher P i and NH 4 + uptake capacities than NM plants. In the control treatment, specific P i uptake rates were almost 10, 4 and 3 times higher in plants associated with P. involutus, S. luteus and T. terrestris, respectively, than in NM plants, and specific NH 4 + uptake rates were about 2, 2 and 5 times higher, respectively, than those of NM seedlings. Compared with the corresponding control plants, a 3-week exposure to 8 µM Cu 2+ had no effect on the nutrient uptake potential of plants. In contrast, the 16 µM Cu 2+ treatment significantly reduced P i uptake capacity of all plants and decreased NH 4 + uptake capacity of seedlings colonized by S. luteus or T. terrestris. The 32 µM Cu 2+ 1-h shock treatment reduced specific NH 4 + and P i uptake rates of roots colonized by S. luteus to 39 and 77%, respectively, of the original rates. The Cu 2+ 1-h shock treatment reduced the NH 4 + uptake rate of NM plants by 51%.

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Section: +mentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Nutrient uptake by intact mycorrhizal Pinus sylvestris seedlings: a diagnostic tool to detect copper toxicity

1999

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“…Most studies of metal sensitivity of ectomycorrhizal (ECM) seedlings have examined seedlings colonized before metal treatment (Brown & Wilkins, 1985 ;Chappelka et al, 1991 ;Colpaert & Van Assche, 1992, 1993Bu$ cking & Heyser, 1994). The authors of these studies reported a wide range of responses to potentially toxic metals and in most cases described some degree of amelioration of metal toxicity towards the hosts (Hartley et al, 1997a).…”

Section: mentioning

confidence: 99%

“…As outlined in the Introduction, several authors have described host amelioration of metal toxicity by ECM fungi (Brown & Wilkins, 1985 ;Chappelka et al, 1991 ;Colpaert & Van Assche, 1992, 1993Bu$ cking & Heyser, 1994). However, most of those studies failed to consider the stimulation of plant biomass by ECM fungi in the absence of metal contamination.…”

Section: Cross-colonization By Paxillus Involutusmentioning

confidence: 99%

Cross‐colonization of Scots pine (Pinus sylvestris) seedlings by the ectomycorrhizal fungus Paxillus involutus in the presence of inhibitory levels of Cd and Zn

Hartley¹,

Cairney²,

Meharg³

1999

New Phytologist

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The effects of Cd and Zn on cross-colonization by Paxillus involutus of Scots pine seedlings was examined by using pairs of ectomycorrhizal (ECM) and non-mycorrhizal (NM) seedlings grown in the same vessel. This was done to assess, first, the ability of P. involutus to colonize NM Scots pine seedlings by growth from colonized roots of other Scots pine seedlings in the presence of Cd or Zn, and, second whether ECM colonization of Scots pine by P. involutus provided a competitive advantage over NM seedlings. Ectomycorrhizal colonization of Scots pine was shown to be more sensitive than Scots pine itself to Cd and Zn, but prior colonization did provide a competitive advantage with respect to biomass production. This beneficial effect over NM seedlings was, however, equal in the control, Cd and Zn treatments, and was due simply to growth stimulation in the presence of ECM colonization. Cross-colonization from an ECM to a NM seedling was reduced but not prevented by Cd and Zn. Cd had a more negative effect on cross-colonization than on initial colonization of seedlings, whereas Zn had an equally inhibitory effect on both parameters. These results have important implications for plant establishment on metalcontaminated sites. If cross-colonization between plants is reduced by toxic metals, plant establishment on contaminated sites might be retarded.

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“…Information on degrees of ECM colonization is lacking in most literature on the topic (Bradley et al 1981(Bradley et al , 1982Brown and Wilkins 1985;Bucking and Heyser 1994;Hartley-Whitaker et al 2000b;Adriaensen et al 2004Adriaensen et al , 2006Kim et al 2004;Krupa and Kozdroj 2007;Krznaric et al 2009). Where data are supplied, reported levels of infection are relatively low probably due to the usage of artificial media: e.g., 9-27.8 % (Jourand et al 2010), 22-49 % (Clint andDighton 1992), or highly variable; e.g., 0-75 % , 0-67 % (Dixon 1988), 13-62 % (Hartley-Whitaker et al 2000a), 0-93 % (Dixon and Buschena 1988), but 80-100 % (Colpaert and Van Assche 1992), 50-100 % (Jones and Hutchinson 1988b;Van Tichelen et al 2001).…”

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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The effect of ectomycorrhizal fungi on Zn uptake and distribution in seedlings of Pinus sylvestris L

Cited by 40 publications

References 24 publications

Nutrient uptake by intact mycorrhizal Pinus sylvestris seedlings: a diagnostic tool to detect copper toxicity

Nutrient uptake by intact mycorrhizal Pinus sylvestris seedlings: a diagnostic tool to detect copper toxicity

Cross‐colonization of Scots pine (Pinus sylvestris) seedlings by the ectomycorrhizal fungus Paxillus involutus in the presence of inhibitory levels of Cd and Zn

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

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