Endogenous hormone concentrations correlate with fructan metabolism throughout the phenological cycle in Chrysolaena obovata.

ABSTRACT:

Background and aims

Chrysolaena obovata, an Asteraceae of the Brazilian Cerrado, presents seasonal growth, marked by senescence of aerial organs in winter and subsequent regrowth at the end of this season. The underground reserve organs, the rhizophores, accumulate inulin-type fructans, which are known to confer tolerance to drought and low temperature. Fructans and fructan-metabolizing enzymes show a characteristic spatial and temporal distribution in the rhizophores during the developmental cycle. Previous studies have shown correlations between abscisic acid (ABA) or indole acetic acid (IAA), fructans, dormancy and tolerance to drought and cold, but the signalling mechanism for the beginning of dormancy and sprouting in this species is still unknown.

Methods

Adult plants

SUBMITTER: Rigui AP 

PROVIDER: S-EPMC4648463 | biostudies-literature | 2015 Jun

REPOSITORIES: biostudies-literature