Seasonal variation of soluble carbohydrates and starch in Echinolaena inflexa, a native grass species from the Brazilian savanna, and in the invasive grass Melinis minutiflora
Echinolaena inflexa (Poir.) Chase is an abundant C3 grass species with high biomass production in the Brazilian savanna (cerrado); Melinis minutiflora Beauv. is an African C4 forage grass widespread in cerrado and probably displacing some native herbaceous species. In the present work, we analysed s...
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doaj-c389381660664da1b2821ddbbcfec9812020-11-25T01:33:41ZengInstituto Internacional de EcologiaBrazilian Journal of Biology1678-437570239540410.1590/S1519-69842010000200023S1519-69842010000200023Seasonal variation of soluble carbohydrates and starch in Echinolaena inflexa, a native grass species from the Brazilian savanna, and in the invasive grass Melinis minutifloraA. Souza0CZ. Sandrin1MFA. Calió2ST. Meirelles3VR. Pivello4RCL. Figueiredo-Ribeiro5Instituto de BotânicaInstituto de BotânicaUniversidade de São PauloUniversidade de São PauloUniversidade de São PauloInstituto de BotânicaEchinolaena inflexa (Poir.) Chase is an abundant C3 grass species with high biomass production in the Brazilian savanna (cerrado); Melinis minutiflora Beauv. is an African C4 forage grass widespread in cerrado and probably displacing some native herbaceous species. In the present work, we analysed seasonally the content and composition of soluble carbohydrates, the starch amounts and the above-ground biomass (phytomass) of E. inflexa and M. minutiflora plants harvested in two transects at 5 and 130 m from the border in a restrict area of cerrado at the Biological Reserve and Experimental Station of Mogi-Guaçu (SP, Brazil). Results showed that water soluble carbohydrates and starch amounts from the shoots of both species varied according to the time of the year, whilst in the underground organs, variations were observed mainly in relation to the transects. Marked differences in the pattern of the above-ground biomass production between these two grasses relative to their location in the Reserve were also observed, with two peaks of the invasive species (July and January) at the Reserve border. The differences in carbohydrate accumulation, partitioning and composition of individual sugars concerning time of the year and location in the Reserve were more related to the annual growth cycle of both grasses and possibly to specific physiological responses of M. minutiflora to disturbed environments in the Reserve border.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842010000200023&lng=en&tlng=eninvasão biológicacerradoamidoaçúcaresgramíneas tropicais |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
A. Souza CZ. Sandrin MFA. Calió ST. Meirelles VR. Pivello RCL. Figueiredo-Ribeiro |
spellingShingle |
A. Souza CZ. Sandrin MFA. Calió ST. Meirelles VR. Pivello RCL. Figueiredo-Ribeiro Seasonal variation of soluble carbohydrates and starch in Echinolaena inflexa, a native grass species from the Brazilian savanna, and in the invasive grass Melinis minutiflora Brazilian Journal of Biology invasão biológica cerrado amido açúcares gramíneas tropicais |
author_facet |
A. Souza CZ. Sandrin MFA. Calió ST. Meirelles VR. Pivello RCL. Figueiredo-Ribeiro |
author_sort |
A. Souza |
title |
Seasonal variation of soluble carbohydrates and starch in Echinolaena inflexa, a native grass species from the Brazilian savanna, and in the invasive grass Melinis minutiflora |
title_short |
Seasonal variation of soluble carbohydrates and starch in Echinolaena inflexa, a native grass species from the Brazilian savanna, and in the invasive grass Melinis minutiflora |
title_full |
Seasonal variation of soluble carbohydrates and starch in Echinolaena inflexa, a native grass species from the Brazilian savanna, and in the invasive grass Melinis minutiflora |
title_fullStr |
Seasonal variation of soluble carbohydrates and starch in Echinolaena inflexa, a native grass species from the Brazilian savanna, and in the invasive grass Melinis minutiflora |
title_full_unstemmed |
Seasonal variation of soluble carbohydrates and starch in Echinolaena inflexa, a native grass species from the Brazilian savanna, and in the invasive grass Melinis minutiflora |
title_sort |
seasonal variation of soluble carbohydrates and starch in echinolaena inflexa, a native grass species from the brazilian savanna, and in the invasive grass melinis minutiflora |
publisher |
Instituto Internacional de Ecologia |
series |
Brazilian Journal of Biology |
issn |
1678-4375 |
description |
Echinolaena inflexa (Poir.) Chase is an abundant C3 grass species with high biomass production in the Brazilian savanna (cerrado); Melinis minutiflora Beauv. is an African C4 forage grass widespread in cerrado and probably displacing some native herbaceous species. In the present work, we analysed seasonally the content and composition of soluble carbohydrates, the starch amounts and the above-ground biomass (phytomass) of E. inflexa and M. minutiflora plants harvested in two transects at 5 and 130 m from the border in a restrict area of cerrado at the Biological Reserve and Experimental Station of Mogi-Guaçu (SP, Brazil). Results showed that water soluble carbohydrates and starch amounts from the shoots of both species varied according to the time of the year, whilst in the underground organs, variations were observed mainly in relation to the transects. Marked differences in the pattern of the above-ground biomass production between these two grasses relative to their location in the Reserve were also observed, with two peaks of the invasive species (July and January) at the Reserve border. The differences in carbohydrate accumulation, partitioning and composition of individual sugars concerning time of the year and location in the Reserve were more related to the annual growth cycle of both grasses and possibly to specific physiological responses of M. minutiflora to disturbed environments in the Reserve border. |
topic |
invasão biológica cerrado amido açúcares gramíneas tropicais |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842010000200023&lng=en&tlng=en |
work_keys_str_mv |
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