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Arbuscular mycorrhiza alters metal uptake and the physiological response of Coffea arabica seedlings to increasing Zn and Cu concentrations in soil.
Sci Total Environ. 2010 Oct 15; 408(22):5381-91.ST

Abstract

Studies on mycorrhizal symbiosis effects on metal accumulation and plant tolerance are not common in perennial crops under metal stress. The objective of this study was to evaluate the influence of mycorrhization on coffee seedlings under Cu and Zn stress. Copper (Cu) and zinc (Zn) uptake and some biochemical and physiological traits were studied in thirty-week old Coffea arabica seedlings, in response to the inoculation with arbuscular mycorrhizal fungi (AMF) and to increasing concentrations of Cu or Zn in soil. The experiments were conducted under greenhouse conditions in a 2×4 factorial design (inoculation or not with AMF and 0, 50, 150 and 450mgkg(-1) Cu or 0, 100, 300 and 900mgkg(-1) Zn). Non-mycorrhizal plants maintained a hampered and slow growth even in a soil with appropriate phosphorus (P) levels for this crop. As metal levels increased in soil, a greater proportion of the total absorbed metals were retained by roots. Foliar Cu concentrations increased only in non-mycorrhizal plants, reaching a maximum concentration of 30mgkg(-1) at the highest Cu in soil. Mycorrhization prevented the accumulation of Cu in leaves, and mycorrhizal plants showed higher Cu contents in stems, which indicated a differential Cu distribution in AMF-associated or non-associated plants. Zn distribution and concentrations in different plant organs followed a similar pattern independently of mycorrhization. In mycorrhizal plants, only the highest metal concentrations caused a reduction in biomass, leading to significant changes in some biochemical indicators, such as malondialdehyde, proline and amino acid contents in leaves and also in foliar free amino acid composition. Marked differences in these physiological traits were also found due to mycorrhization. In conclusion, AMF protected coffee seedlings against metal toxicity.

Authors+Show Affiliations

Departamento Biologia Vegetal, Instituto de Biologia, CP 6109, Universidade Estadual de Campinas, 13083-970 Campinas, SP, Brazil.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20716461

Citation

Andrade, S A L., et al. "Arbuscular Mycorrhiza Alters Metal Uptake and the Physiological Response of Coffea Arabica Seedlings to Increasing Zn and Cu Concentrations in Soil." The Science of the Total Environment, vol. 408, no. 22, 2010, pp. 5381-91.
Andrade SA, Silveira AP, Mazzafera P. Arbuscular mycorrhiza alters metal uptake and the physiological response of Coffea arabica seedlings to increasing Zn and Cu concentrations in soil. Sci Total Environ. 2010;408(22):5381-91.
Andrade, S. A., Silveira, A. P., & Mazzafera, P. (2010). Arbuscular mycorrhiza alters metal uptake and the physiological response of Coffea arabica seedlings to increasing Zn and Cu concentrations in soil. The Science of the Total Environment, 408(22), 5381-91. https://doi.org/10.1016/j.scitotenv.2010.07.064
Andrade SA, Silveira AP, Mazzafera P. Arbuscular Mycorrhiza Alters Metal Uptake and the Physiological Response of Coffea Arabica Seedlings to Increasing Zn and Cu Concentrations in Soil. Sci Total Environ. 2010 Oct 15;408(22):5381-91. PubMed PMID: 20716461.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Arbuscular mycorrhiza alters metal uptake and the physiological response of Coffea arabica seedlings to increasing Zn and Cu concentrations in soil. AU - Andrade,S A L, AU - Silveira,A P D, AU - Mazzafera,P, Y1 - 2010/08/15/ PY - 2010/04/19/received PY - 2010/07/26/revised PY - 2010/07/26/accepted PY - 2010/8/19/entrez PY - 2010/8/19/pubmed PY - 2010/10/30/medline SP - 5381 EP - 91 JF - The Science of the total environment JO - Sci Total Environ VL - 408 IS - 22 N2 - Studies on mycorrhizal symbiosis effects on metal accumulation and plant tolerance are not common in perennial crops under metal stress. The objective of this study was to evaluate the influence of mycorrhization on coffee seedlings under Cu and Zn stress. Copper (Cu) and zinc (Zn) uptake and some biochemical and physiological traits were studied in thirty-week old Coffea arabica seedlings, in response to the inoculation with arbuscular mycorrhizal fungi (AMF) and to increasing concentrations of Cu or Zn in soil. The experiments were conducted under greenhouse conditions in a 2×4 factorial design (inoculation or not with AMF and 0, 50, 150 and 450mgkg(-1) Cu or 0, 100, 300 and 900mgkg(-1) Zn). Non-mycorrhizal plants maintained a hampered and slow growth even in a soil with appropriate phosphorus (P) levels for this crop. As metal levels increased in soil, a greater proportion of the total absorbed metals were retained by roots. Foliar Cu concentrations increased only in non-mycorrhizal plants, reaching a maximum concentration of 30mgkg(-1) at the highest Cu in soil. Mycorrhization prevented the accumulation of Cu in leaves, and mycorrhizal plants showed higher Cu contents in stems, which indicated a differential Cu distribution in AMF-associated or non-associated plants. Zn distribution and concentrations in different plant organs followed a similar pattern independently of mycorrhization. In mycorrhizal plants, only the highest metal concentrations caused a reduction in biomass, leading to significant changes in some biochemical indicators, such as malondialdehyde, proline and amino acid contents in leaves and also in foliar free amino acid composition. Marked differences in these physiological traits were also found due to mycorrhization. In conclusion, AMF protected coffee seedlings against metal toxicity. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/20716461/Arbuscular_mycorrhiza_alters_metal_uptake_and_the_physiological_response_of_Coffea_arabica_seedlings_to_increasing_Zn_and_Cu_concentrations_in_soil_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(10)00758-8 DB - PRIME DP - Unbound Medicine ER -