Atributos funcionais como resposta à plasticidade de Protium heptaphyllum (Aubl.) Marchand em área de restinga em condições de inundação do solo
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Data
2022-12-22
Autores
Jesus, Vera Lucia Pereira de
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Universidade Federal do Espírito Santo
Resumo
Functional attributes are the characteristics of an organism that were inherited in evolution and expressed according to the environment in which it is found. Based on this, the leaf characteristics of Protium heptaphyllum (Aubl.) Marchand were investigated in two restinga plant formations, one floodable and the other not, through the biometry of Protium leaves, stomatal density and chlorophyll pigments. Ten individuals of P. heptaphyllum were selected per area and 20 leaves were collected from each one for biometric analysis. The criterion for choosing the individual was based on the height and diameter of the species and its occurrence in the two restinga areas (flooding and non-flooding), in addition to being the only one of the genus Protium present in these areas. From the collection of leaves, leaf area and specific leaf area, fresh and dry mass, leaf and petiole thickness, leaf and petiole length, sclerophyll index, stomatal density, chlorophyll a, b and carotenoids were obtained. Mean values and the standard deviation of each biometric parameter were determined, considering the significant values between the two areas. Comparing the flooded and non-flooded areas, the results showed that there was no significant difference for leaf thickness and for chlorophyll a, b and carotenoid pigments. Stomatal density was higher in non-flooded. The attributes leaf area, specific leaf area, fresh mass, dry mass, petiole thickness, leaf and petiole length and sclerophily index were higher in the floodplain area. It is concluded that the biometric parameters that were most relevant represent the ability of P. heptaphyllum to adjust its morphological characteristics as a function of water stress, proving its plasticity, as well as readjusting its mechanisms as found in the chlorophyll contents, which in the two areas, did not change significantly.
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Biometria , Burseraceae , Mata atlântica