Características anatômicas, fisiológicas e de óleos essenciais de Melissa officinalis L. (Lamiaceae), em função da adubação orgânica, intensidade e qualidade de luz
The objective was to evaluate the effect of the organic manure, light intensity and quality in physiological and anatomical characteristics and essential oil of Melissa officinalis L. The experiments treatment were: organic manure in 0, 30, 60, 90 and 120 t. ha-1 cattle manure application and 0, 15,...
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| Formato: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2008 |
| País: | Brasil |
| Recursos: | Universidade Federal de Lavras (UFLA) |
| Repositorio: | Repositório Institucional da UFLA |
| Idioma: | portugués |
| OAI Identifier: | oai:repositorio.ufla.br:1/4035 |
| Acesso em linha: | https://repositorio.ufla.br/handle/1/4035 |
| Access Level: | acceso abierto |
| Palavra-chave: | Ciências Agrárias Erva cidreira verdadeira Plantas medicinais e aromáticas Clorofilas Lemon balm Aromatic and medicinal plants Chlorophylls |
| Resumo: | The objective was to evaluate the effect of the organic manure, light intensity and quality in physiological and anatomical characteristics and essential oil of Melissa officinalis L. The experiments treatment were: organic manure in 0, 30, 60, 90 and 120 t. ha-1 cattle manure application and 0, 15, 30, 45 and 60 t. ha-1 chicken manure; 20%, 60% and 100% of light intensity using thermo-reflectors shading nets and using black, blue and red shading nets and plants under full sun light. In the first experiment, the treatments that had higher growth of the plants with better increase of dry leaves as well as yield of essential oil and citral of M.officinalis L. were with the application of cattle manure in the rate of 60 t.ha-1 and the chicken manure in the rates of 30 and 60 t.ha-1. In the second experiment the physiological characteristics showed that using thermo-reflectors shading nets increase the growth of the plant. At 20% and 60% of luminous intensity occured high productions of leaves dry biomass. There was no difference for essential oil content, while its yield showed superior with cultivation under shading, and the citral´s yield was more efficient at 60% light intensity. Plants submitted at 20% of luminous intensity showed higher a chlorophyll and, therefore, higher a/b chlorophyll ratio. Lemon balm´s leaves under total sun light and 60% of light showed cells of upper face thicker, but its inferior cells showed characteristics found in shaded leaves or thinner. As much as added the availability of light, occurred higher chloroplasts number, however, under total sun light it exhibited thinner, with small area. The starch grains of leaves grown under 60% of luminous intensity showed higher area and occupied higher part on chloroplasts. In the third experiment, was observed that the utilization of nets favored the growth, independently of the color, in comparison with total sun light. For essential oil, under red shading net had lower content and yield, but it´s showed the higher citral´s content. Plants grew under blue shading net showed higher a, b, and total chlorophyll content. At full sunshine had higher thickness of epidermis and mesophyll, as well as in chloroplast quantity and starch grains area. The major proportion occupied for starch grain on chloroplasts was under black shading net. |
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