Nitrogenous compounds, phenolic compounds and morphological aspects of leaves: comparison of deciduous and semideciduous arboreal legumes

Scientia Agricola

Ana Lúcia Da Silva Lima²  Fábio Zanella²  Marlene Aparecida Schiavinato¹  Claudia Regina Baptista Haddad¹ 

[1] ,ULBRA CEULJI Depto. de Biologia e AgronomiaParaná RO ,Brasil

关键词: leaf life span;    specific leaf mass;    total nitrogen;    tannins;    Atlantic forest;    longevidade foliar;    massa foliar específica;    nitrogênio total;    taninos;    floresta Atlântica;   

DOI  :  10.1590/S0103-90162006000100007

来源: SciELO

【 摘 要 】

In general, perennial species contain higher concentrations of certain secondary compounds, such as phenolics, lower levels of nitrogenous compounds, and greater specific leaf mass (SLM) than deciduous species. The aim of this study was to verify whether the comparative data reported in the literature regarding deciduous and evergreen species, also applies to four selected species of a semideciduous tropical forest (a remnant of the Atlantic Forest). The four species chosen for this study, each with apparently different leaf life spans, were two semideciduous (Hymenaea courbaril L. var. stilbocarpa (Hayne) Lee et Lang., and Lonchocarpus guilleminianus (Tul.) Malme, and two deciduous (Enterolobium contortisiliquum (Vell.) Morong., and Peltophorum dubium (Spreng.) Taub.). Plants were grown in a greenhouse in plastic pots containing soil taken from their natural habitat. Mature leaves were harvested for determination of the SLM and contents of phenolic compounds, tannins, nitrate, protein, free amino acids, chlorophyll, and nitrogen. Data registered are in agreement with those of the literature. Leaves with the longest life span had the highest content of phenolics and the lowest levels of tannins, nitrate, protein, amino acids, chlorophyll and nitrogen, as well as presenting the greatest SLM.

【 授权许可】

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