Chloroplastid pigment contents and chlorophyll a fluorescence in amazonian tropical three species
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidade Federal de Viçosa
2007
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| _version_ | 1876491338657038336 |
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| author | Ronaldo Ribeiro de Morais |
| author_facet | Ronaldo Ribeiro de Morais |
| contents | Chloroplastid pigment contents and chlorophyll a fluorescence in amazonian tropical three species Ronaldo Ribeiro de Morais José Francisco de Carvalho Gonçalves Ulysses Moreira dos Santos Junio Oliver Dünisch André Luis Wendt dos Santos Agrociencias Bertholletia excelsa Carapa guianensis and Dipteryx odorata Plants react to changes in light and hydrological conditions in terms of quantity and composition of chloroplastidic pigments, which affects the photosynthetic properties and consequently the accumulation of plant biomass. Thus, the chloroplastidic pigment concentration and chlorophyll a fluorescence of three Amazonian species (Bertholletia excelsa, Carapa guianensis e Dipteryx odorata) were investigated in sun and shade leaves form the tree crown collected during two distinct periods of precipitation (dry and rainy seasons). Pigment contents were determined by spectrophotometry and fluorescence variables were determined using a portable fluorometer. The results demonstrated that the species showed high concentrations of Chl a, Chl b e Chltotal during the wet season in relation to the dry season, especially in shade leaves. A higher concentration of carotenoids was found in B. excelsa, when compared with leaves of C. guianensis and D. odorata. In leaves of B. excelsa and D. odorata no significant difference was found in relation to the photochemistry of photosystem II (Fv/Fm) between the wet and dry seasons. In conclusion, the three species react differently to variations in the light and precipitation conditions regarding light capture, aspects that might be considered in the management of forest plantations. 2007 artículo científico 0100-6762 https://www.redalyc.org/articulo.oa?id=48831520 en http://www.redalyc.org/revista.oa?id=488 Revista Árvore application/pdf Universidade Federal de Viçosa Revista Árvore (Brasil) Num.5 Vol.31 |
| format | Artículo científico |
| id | redalyc_48831520 |
| institution | Redalyc |
| language | en |
| publishDate | 2007 |
| publisher | Universidade Federal de Viçosa |
| spellingShingle | Chloroplastid pigment contents and chlorophyll a fluorescence in amazonian tropical three species Ronaldo Ribeiro de Morais Agrociencias Bertholletia excelsa Carapa guianensis and Dipteryx odorata Chloroplastid pigment contents and chlorophyll a fluorescence in amazonian tropical three species Ronaldo Ribeiro de Morais José Francisco de Carvalho Gonçalves Ulysses Moreira dos Santos Junio Oliver Dünisch André Luis Wendt dos Santos Agrociencias Bertholletia excelsa Carapa guianensis and Dipteryx odorata Plants react to changes in light and hydrological conditions in terms of quantity and composition of chloroplastidic pigments, which affects the photosynthetic properties and consequently the accumulation of plant biomass. Thus, the chloroplastidic pigment concentration and chlorophyll a fluorescence of three Amazonian species (Bertholletia excelsa, Carapa guianensis e Dipteryx odorata) were investigated in sun and shade leaves form the tree crown collected during two distinct periods of precipitation (dry and rainy seasons). Pigment contents were determined by spectrophotometry and fluorescence variables were determined using a portable fluorometer. The results demonstrated that the species showed high concentrations of Chl a, Chl b e Chltotal during the wet season in relation to the dry season, especially in shade leaves. A higher concentration of carotenoids was found in B. excelsa, when compared with leaves of C. guianensis and D. odorata. In leaves of B. excelsa and D. odorata no significant difference was found in relation to the photochemistry of photosystem II (Fv/Fm) between the wet and dry seasons. In conclusion, the three species react differently to variations in the light and precipitation conditions regarding light capture, aspects that might be considered in the management of forest plantations. 2007 artículo científico 0100-6762 https://www.redalyc.org/articulo.oa?id=48831520 en http://www.redalyc.org/revista.oa?id=488 Revista Árvore application/pdf Universidade Federal de Viçosa Revista Árvore (Brasil) Num.5 Vol.31 |
| title | Chloroplastid pigment contents and chlorophyll a fluorescence in amazonian tropical three species |
| topic | Agrociencias Bertholletia excelsa Carapa guianensis and Dipteryx odorata |
| url | https://www.redalyc.org/articulo.oa?id=48831520 |