Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/38309
Title: Adaptações fisiológicas e anatômicas de Melissa officinalis L. (Lamiaceae) cultivadas sob malhas termorrefletoras em diferentes intensidades luminosas
Other Titles: Physiological and morphological adaptations of Melissa officinalis L. (Lamiaceae) cultivated under thermo-reflector shading nets at different luminous intensities
Keywords: Plantas medicinais
Cloropasto
Melissa - Cultivo
Medicinal plants
Chloroplast
Melissa - Cultivation
Issue Date: 2011
Publisher: Sociedade Brasileira de Plantas Medicinais
Citation: BRANT, R. S. et al. Adaptações fisiológicas e anatômicas de Melissa officinalis L. (Lamiaceae) cultivadas sob malhas termorrefletoras em diferentes intensidades luminosas. Revista Brasileira de Plantas Medicinais, v. 13, n. 4, p. 467-474, 2011.
Abstract: The aim of this study was to evaluate physiological and anatomical modifications in lemon balm plants, cultivated under thermo-reflector nets (Aluminet®) at different levels of shading, in order to understand the phenotypic plasticity in adaptation response to different light quantities. The treatments were characterized by plants subjected to full sun and 20 and 60% of luminous intensity, and arranged in completely randomized design (CRD). The quantifications of chlorophylls were done in four replicates, the measurements of epidermis and parenchymas were repeated 15 times and 10 replicates were used to evaluate characteristics of chloroplasts and their starch grains. Plants subjected to 20% of luminous intensity showed higher quantity of chlorophyll a and, therefore, higher chlorophyll a/b ratio. Lemon balm leaves under full sun and 60% of light showed thicker adaxial epidermis cells, but the abaxial epidermis cells showed characteristics found in shaded leaves, i.e., they were slender. The higher the light intensity, the larger the number of chloroplasts; however, under full sun, they were slender and had smaller area. The starch grains of leaves grown under shaded environments showed larger area and, at 60% of luminous intensity, occupied the largest part of chloroplasts. Thus, lemon balm plants, subjected to shading conditions, showed phenotypic plasticity.
URI: http://repositorio.ufla.br/jspui/handle/1/38309
Appears in Collections:DAG - Artigos publicados em periódicos



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