High copper (Cu) levels in uprooted old vineyard soils may cause toxicity in
transplanted young vines, although such toxicity may be reduced by inoculating plants
with arbuscular mycorrhizal fungi (AMF). The objective of this study was to evaluate
the effects of AMF on the plant growth, chlorophyll contents, mycorrhizal
colonization, and Cu and phosphorus (P) absorption in young vines cultivated in a
vineyard soil contaminated by Cu. Commercial vineyard soil with high Cu levels was
placed in plastic tubes and transplanted with young vines, which were inoculated with
six AMF species (Dentiscutata heterogama, Gigaspora gigantea, Acaulospora
morrowiae, A. colombiana, Rhizophagus clarus, R. irregularis) and a
control treatment on randomized blocks with 12 replicates. After 130 days, the
mycorrhizal colonization, root and shoot dry matter (DM), height increment, P and Cu
absorption, and chlorophyll contents were evaluated. The height increment, shoot DM
and chlorophyll contents were not promoted by AMF, although the root DM was increased
by R. clarus and R. irregularis, which had the
greatest mycorrhizal colonization and P uptake. AMF increased Cu absorption but
decreased its transport to shoots. Thus, AMF species, particularly R.
clarus and R. irregularis, contribute to the
establishment of young vines exposed to high Cu levels.
Contenido de carbono y nitrógeno en fracciones granulométricas de materia orgánica en agregados de suelo sin labranza y sistemas convencionales de siembra para cebollas
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