High aluminum concentration and initial establishment of Handroanthus impetiginosus: clues about an Al non-resistant species in Brazilian Cerrado
Autor: | Daniel Amorim Vieira, Ane Marcela das Chagas Mendonça, Ana Luiza de Oliveira Vilela, Nayara Cristina de Melo, João Paulo Rodrigues Alves Delfino Barbosa, Jean Marcel Sousa Lira |
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Rok vydání: | 2019 |
Předmět: |
0106 biological sciences
Handroanthus impetiginosus Stomatal conductance biology Forestry 04 agricultural and veterinary sciences Photosynthesis biology.organism_classification 01 natural sciences Chloroplast chemistry.chemical_compound Horticulture Nutrient chemistry Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Sulfate 010606 plant biology & botany Transpiration |
Zdroj: | Journal of Forestry Research. 31:2075-2082 |
ISSN: | 1993-0607 1007-662X |
Popis: | Cerrado soils are acidic and nutrient-poor, with high content of solubilized Al3+. Plants growing in these conditions may display adaptations to cope with high aluminum concentrations especially during early developmental stages. We investigated leaf nutritional status, and photosynthetic and growth characteristics during the initial establishment of Handroanthus impetiginosus (Mart. Ex Dc.) Mattos, a secondary tree species distributed in the Brazilian Cerrado. Our goal was to understand leaf-level traits related to different aluminum concentrations. H. impetiginosus plants were cultivated in four different aluminum sulfate concentrations: 0, 1, 2, and 4 mM Al, for 40 days. We performed analyses of growth, leaf gas exchange, chloroplast pigment content, and leaf mineral nutrients. We observed a linear increase of Al leaf content as a function of Al concentration in the nutrient solution. Plants grown in 1 mM Al showed a remarkable increase of K leaf content, net photosynthesis, stomatal conductance, and transpiration, while in 4 mM Al there were reductions of N, P, and K contents, gas exchange characteristics, and height. H. impetiginosus did not have mechanisms of avoidance, compartmentalization, or resistance to high Al concentrations. Indeed, this species showed a hormetic response, with low Al concentrations stimulating and high Al concentrations inhibiting plant responses. |
Databáze: | OpenAIRE |
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