| Full text | |
| Author(s): |
Rodrigo Fazani Esteves Sanches
[1]
;
Ana Paula Oliveira da Silva
[2]
;
Vanessa Pires da Costa
[3]
;
Maria Ângela Machado de Carvalho
[4]
;
Emerson Alves da Silva
[5]
Total Authors: 5
|
| Affiliation: | [1] Instituto de Botânica. Núcleo de Pesquisa Fisiologia e Bioquímica de Plantas - Brasil
[2] Instituto de Botânica. Núcleo de Pesquisa Fisiologia e Bioquímica de Plantas - Brasil
[3] Instituto de Botânica. Núcleo de Pesquisa Fisiologia e Bioquímica de Plantas - Brasil
[4] Instituto de Botânica. Núcleo de Pesquisa Fisiologia e Bioquímica de Plantas - Brasil
[5] Instituto de Botânica. Núcleo de Pesquisa Fisiologia e Bioquímica de Plantas - Brasil
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | Hoehnea; v. 46, n. 4 2019-11-25. |
| Abstract | |
ABSTRACT Water stress is an environmental factor that can regulate growth, limit production and lead to physiological and biochemical changes. Plants present a series of adaptive responses to drought, such as osmotic adjustment, in which carbohydrates play an important role. To evaluate the influence of water deficit on carbohydrates accumulation in V. discolor, the plants were divided into two groups: daily watering and water suppression for 14 days being re-watering after this period. Leaves and roots were collected at 0, 3, 6, 9, 12, 15 and 18 days, for ecophysiological and biochemical analyzes. Variations in carbohydrate contents in V. discolor showed a close relationship with changes in the plant water status, with higher concentrations of soluble sugars, total fructans, oligosaccharides, reducing sugars coinciding with the lower values of soil moisture and leaf water potentials and relative water content. In the tuberous roots, there is an increase in carbohydrate concentrations after re-watering. The increase of these low molecular weight carbohydrates is involved in osmotic adjustment and therefore acts to protect against dehydration. (AU) | |
| FAPESP's process: | 09/01570-0 - Water Relations and responses to water deficit in species from Mata Atlântica and Cerrado: mecanisms of water status maintenance. |
| Grantee: | Emerson Alves da Silva |
| Support Opportunities: | Regular Research Grants |