| Texto completo | |
| Autor(es): |
Moraes, M. G.
[1]
;
Chatterton, N. J.
[2]
;
Harrison, P. A.
[2]
;
Filgueiras, T. S.
[3]
;
Figueiredo-Ribeiro, R. C. L.
[4]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Univ Fed Goias, Inst Ciencias Biol, BR-74001970 Goiania, Go - Brazil
[2] ARS, Forage & Range Res Lab, USDA, Logan, UT - USA
[3] 3 Herbarium Maria Eneyda P Kauffman Fidalgo Inst, Sao Paulo - Brazil
[4] Inst Bot, Nucleo Fisiol & Bioquim Plantas 4, Sao Paulo - Brazil
Número total de Afiliações: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | GRASS AND FORAGE SCIENCE; v. 68, n. 1, p. 165-177, MAR 2013. |
| Citações Web of Science: | 11 |
| Resumo | |
Non-structural carbohydrates (NSC) are the primary energy available for growth and dry-mass production in forage grasses. They are also associated with tolerance to environmental stresses, including drought. Soluble carbohydrates, especially fructans of temperate forage grasses, have been extensively studied; however, little is known about NSC of tropical grasses. These plants are abundant in the Cerrado, a savanna-like vegetation with a definite seasonality in rainfall distribution. Such an environment presents an ideal condition for the occurrence of fructans. However, the present analysis of carbohydrates in aerial parts of twenty-four tropical grass species, mainly from the Panicoideae subfamily in the Cerrado, shows a distinctively different NSC profile when compared with temperate grasses. Free glucose and starch are common NSC found in most plant organs. However, free fructose and sucrose-based oligosaccharides were only found in very low amounts. Sucrose was detected in higher amounts only in stems. A linear series of malto-oligosaccharides was found in leaf blades, sheaths and stems of most of the Cerrado grasses, except for those from the Andropogoneae tribe. These results indicate a diversity of regulatory pathways of NSC metabolism in tropical forage grasses from the Cerrado. (AU) | |
| Processo FAPESP: | 00/06422-4 - Caesalpinia echinata (Pau-brasil) da semente à madeira, um modelo para estudos de plantas arbóreas tropicais brasileiras |
| Beneficiário: | Rita de Cassia Leone Figueiredo Ribeiro |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 05/04139-7 - Carboidratos de plantas tropicais como moduladores de processos ecofisiológicos e indicadores de respostas a estresses ambientais |
| Beneficiário: | Marcia Regina Braga |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |