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Colonization of pennycresses (Thlaspi spp.) of the Brassicaceae by arbuscular mycorrhizal fungiRegvar, Marjana ...Members of the Brassicaceae are generaliy believed to be non-mycorrhizal. Pennycress (Thlaspi) species of this family from diverse locations in Slovenia, Austria, Italy and Germany were examined for ... their colonisation by arbuscular mycorrhizal fungi (AMF). Meadow species (T. praecox, T. caerulescens and T. montanum) were sparsely but distinctly colonised, as indicated by the occurrence of intraradical hyphae, vesicles, coils, and occasionally arbuscules. Species from other locations were poorly colonised, but arbuscules were not discernible. The genus Thlaspi comprises several heavymetal hyperaccumulating species (T. caerulescens, T. goesingense, T. calaminare, T. cepaeifolium). All samples coliected from heavy metal soils were at best poorly colonized. Thus the chance is small to find a "hypersystem" in phytoremediation consisting of an AM fungus which prevents the uptake of the major part of the heavy metals and of a Thlaspi species which effectively deposits the residual heavy metals inevitably taken up into its vacuoles. In two different PCR approaches, fungal DNA was amplified from most of the Thlaspi roots examined, even from those with a very low incidence of AMF colonization. Sequencing of the 28S- and 18S-rDNA PCR-products revealedthat different Thlaspi field samples were colonized by Glomus intraradices and thus by a common AM fungus. However, none of the sequences obtained was identical to any other found in the present study or deposited inthe databanks, which might indicate that a species continuum exists in the G. intraradices clade. An effective eolonization of Thlaspi by AMF could not be established in greenhouse experiments. Although the data show that Thlaspi can be colonized by AMF, it is doubtful whether an effective symbiosis with the mutual exchange of metabolites is formed by both partners.Vir: Journal of Plant Physiology. - ISSN 0176-1617 (Letn. 160, št. 6, 2003, str. 615-626)Vrsta gradiva - članek, sestavni delLeto - 2003Jezik - angleškiCOBISS.SI-ID - 16159961
Avtor
Regvar, Marjana |
Vogel-Mikuš, Katarina |
Irgel, Nina |
Wraber, Tone, 1938-2010 |
Hildebrandt, Ulrich |
Wilde, Petra |
Bothe, Hermann, 1940-
Teme
Plants |
Fungi |
Symbiosis |
Soil Pollutants |
Metals, Heavy |
Polymerase Chain Reaction |
Dna, Fungal |
Glive |
Kovine težke |
Rastline |
Simbioza |
Zemlja, onesnaževalci |
DNA glivična |
Polimerazna, verižna reakcija
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Regvar, Marjana | 12013 |
Vogel-Mikuš, Katarina | 21623 |
Irgel, Nina | ![]() |
Wraber, Tone, 1938-2010 | 01256 |
Hildebrandt, Ulrich | ![]() |
Wilde, Petra | ![]() |
Bothe, Hermann, 1940- | ![]() |
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