Copper translocation and tolerance in seedlings of tree species grown in contaminated soil

Fortes‐Silva, Rodrigo; Ros, Clóvis Orlando Da; Scheid, Douglas Leandro; Grolli, Andre Luís; Marco, Rudinei De; Missio, Evandro Luiz

doi:10.1590/1807-1929/agriambi.v19n11p1093-1099

Cited by 9 publications

(5 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Cu absorbed by H. courbaril plants was retained in the roots, mainly at the highest concentrations. This result resembles that found by Silva et al (2015), with emphasis on the tree Enterolobium contortisiliquum (Vell.) Morong.…”

Section: Copper Content In Tissues and Indexessupporting

confidence: 87%

Copper Toxicity on Photosynthetic Responses and Root Morphology of Hymenaea courbaril L. (Caesalpinioideae)

Marques

Júnior

Silva

et al. 2018

Water Air Soil Pollut

View full text Add to dashboard Cite

Copper (Cu) is a micronutrient essential for plant development. However, in excess, it is toxic to plants and may cause various physiological and morphological changes. The study of the growth of plants exposed to excess Cu is important for the development of phytoremediation programs and for understanding the mechanisms involved in the tolerance of this metal. In this context, the objective of this research was to evaluate the effect of excess copper on photosynthetic responses and root morphology of Hymenaea courbaril L. Biometric measurements, gas exchange, root morphology, and Cu content in tissues and indices (TI and TF) were assessed, involving metal content and biomass. Up to a concentration of 200 mg kg −1 , Cu favored growth, gas exchange, and root morphology of the plants under study. At a higher concentration (800 mg kg −1) in the soil, it affected plant growth and caused a decrease in photosynthetic rate. Biochemical limitations in photosynthesis were observed, as well as lower maximum net photosynthetic rate (A max), respiration rate in the dark (R d), light compensation point (LCP), light saturation point (LSP), and apparent quantum yield (α), when exposed to excess Cu. Root length, surface area, mean diameter, root volume, dry biomass, and specific root length decreased with high Cu concentrations in the soil. Cu was accumulated in the roots as a mechanism of tolerance to the excess of this metal in order to preserve the most metabolically active tissues present in the leaves. At a concentration of 800 mg kg −1 , copper also caused inhibition of the root system. Plants of H. courbaril showed tolerance to excess Cu in the soil and can be indicated for the recovery of areas contaminated with this metal.

show abstract

Section: Copper Content In Tissues and Indexessupporting

confidence: 87%

Copper Toxicity on Photosynthetic Responses and Root Morphology of Hymenaea courbaril L. (Caesalpinioideae)

Marques

Júnior

Silva

et al. 2018

Water Air Soil Pollut

View full text Add to dashboard Cite

show abstract

“…The differences in Cu translocation rates and root accumulation capacity between S. terebinthifolia and E. uni ora may be explained by different biochemical mechanisms governing the levels of root retention existing in each species (Silva et al 2015). The ability to limit the translocation of heavy metals to the shoots and retain them in the roots is a tolerance indicator (Vendruscolo et al 2018).…”

Section: Discussionmentioning

confidence: 99%

“…Studies with several Atlantic Forest tree species cultivated in contaminated soil observed that the impacts on biometric parameters occur differently, depending on the species, concentration and time of exposure to excess copper (Silva et al 2010;Silva et al 2011;Caires et al 2011;Silva et al 2015;Marco et al 2016;Asensio et al 2019;Zabotto et al 2020). Excess Cu had negative effects on leaf dry biomass of the pioneer species S. terebinthifolia, but did not affect height or stem diameter, while the non-pioneer species E. uni ora showed no reduction in biomass but did show a decrease in height.…”

Section: Discussionmentioning

confidence: 99%

Physiological and biochemical changes in tree seedlings in an urban forest soil contaminated with copper

Siqueira

Kanashiro

Domingos

et al. 2021

Preprint

View full text Add to dashboard Cite

Context Soil pollution by heavy metals is a worldwide environmental concern. Owing to their proximity to anthropogenic emission sources, urban forest fragments are highly affected by the excessive input of heavy metals into the soil.Objectives This study aimed to assess the physiological and biochemical responses of two native Brazilian Atlantic Forest Schinus terebinthifolia Raddi (pioneer species) and Eugenia uniflora L. (non-pioneer species), when cultivated in soils contaminated with Cu. Methods Plants were cultivated in soils of an urban forest fragment contaminated with 0 (control), 60, 120, 180 or 240 mg Cu kg-1 soil. Growth variables, Cu content in plant tissues, translocation index, bioaccumulation factor, pigment contents, leaf gas exchange and chlorophyll fluorescence were all measured to assess physiological alterations resulting from copper stress, while the enzymatic (superoxide dismutase) and nonenzymatic (ascorbic acid and glutathione) antioxidants were quantified to assess the biochemical responses of the species. Results Both species presented high uptake and accumulation of Cu in roots with low translocation rates to shoots; however, S. terebinthifolia showed higher Cu restriction in roots than E. uniflora. S. terebinthifolia and E. uniflora showed distinct responses in growth and leaf gas exchange. The species showed neither difference in enzymatic contents nor oxidative reduction. Conclusion The restriction of copper in roots appears to be the principal protective mechanism against copper phytotoxicity, preventing negative effects on the physiological and biochemical status of the species. S. terebinthifolia shows potential as a Cu phytostabilizer, while the E. uniflora has potential as a Cu phytoextractor.

show abstract

“…In the three species, copper bioaccumulation occurred mainly in the root system, and an increase in Cu contents in the tissue was observed with an increase in Cu concentrations in the soil. A study conducted with the species Peltophorum dubium, Parapiptadenia rígida, Enterolobium contortisiliquum (Silva et al, 2011), Bauhinia forficata Link, Pterogyne nitens Tul (Silva et al, 2015) and two apple cultivars (Malus hupehensis Rehd.) (Wang et al, 2016) showed that Cu accumulates preferentially in the root system, a result similar to that found in this study.…”

Section: Discussionmentioning

confidence: 99%

GROWTH AND PHYSIOLOGICAL RESPONSES OF TREE SPECIES (Hymenaea courbaril L., Peltophorum dubium (Spreng.) Taub. and Myroxylon peruiferum L. F.) EXPOSED TO DIFFERENT COPPER CONCENTRATIONS IN THE SOIL

et al. 2018

View full text Add to dashboard Cite

-Copper (Cu) is an essential micronutrient for plants. However, when in excess, it becomes phytotoxic. In this context, the objective of this study was to evaluate the growth and physiological responses of tree species exposed to different copper concentrations in the soil. Three experiments were carried out, one for each forest species under study: Myroxylon peruiferum ("Óleo Bálsamo"), Hymenaea courbaril ("Jatobá") and Peltophorum dubium ("Canafístula"), with the same doses of copper (0, 50, 100, 200 and 400 mg kg -1 ). The experimental design was in randomized blocks (DBC), with five copper concentrations and four replicates. The plants were grown on soil substrate packed in 8-dm 3 pots and kept in a greenhouse for 90 days. Biometric measurements, chlorophyll, antioxidant enzymes and copper content in tissues were evaluated. Copper did not influence the vegetative growth of the species studied. The content of chlorophyll "a" was reduced with increasing copper concentrations in the soil. H. courbaril had 56 to 92% copper retained in the roots, and the same behavior was observed for P. dubium (77-91%) and M. peruiferum (19-64%). In the three species studied, there was copper bioaccumulation, mainly in the roots, possibly as a metal tolerance strategy, preserving the most active tissues and the photosynthetic machinery. Cu translocation from roots to shoot was very restricted in all species. This behavior, associated with the increase in the activity of some antioxidant enzymes in plants, may indicate the phytoremediation potential of the studied species.Keywords: Antioxidant enzymes; Bioaccumulation; Heavy metal. CRESCIMENTO E RESPOSTAS FISIOLÓGICAS DAS ESPÉCIES ARBÓREASHymenaea courbaril L., Peltophorum dubium (Spreng.) Taub. e Myroxylon peruiferum L. F. EXPOSTAS A DIFERENTES CONCENTRAÇÕES DE COBRE NO SOLORESUMO -O cobre (Cu) é um micronutriente essencial aos vegetais, mas em excesso torna-se fitotóxico para as plantas. Nesse contexto, o objetivo deste trabalho foi avaliar o crescimento e as respostas fisiológicas de espécies arbóreas expostas a diferentes concentrações de cobre no solo. Foram realizados três experimentos, sendo um para cada espécie florestal em estudo: Myroxylon peruiferum (Óleo Bálsamo), Hymenaea courbaril (Jatobá) e Peltophorum dubium (Canafístula), com as mesmas doses de cobre (0, 50, 100, 200 e 400 mg kg -1 ). O delineamento para os experimentos foi em blocos casualizados (DBC) com cinco concentrações de Cu e quatro repetições. As plantas foram cultivadas em substrato de solo acondicionados em vasos de 8 dm 3 e mantidas em casa-de-vegetação por 90 dias. Foram avaliadas medidas biométricas, clorofila, enzimas

show abstract

Copper translocation and tolerance in seedlings of tree species grown in contaminated soil

Cited by 9 publications

References 18 publications

Copper Toxicity on Photosynthetic Responses and Root Morphology of Hymenaea courbaril L. (Caesalpinioideae)

Copper Toxicity on Photosynthetic Responses and Root Morphology of Hymenaea courbaril L. (Caesalpinioideae)

Physiological and biochemical changes in tree seedlings in an urban forest soil contaminated with copper

GROWTH AND PHYSIOLOGICAL RESPONSES OF TREE SPECIES (Hymenaea courbaril L., Peltophorum dubium (Spreng.) Taub. and Myroxylon peruiferum L. F.) EXPOSED TO DIFFERENT COPPER CONCENTRATIONS IN THE SOIL

Contact Info

Product

Resources

About