SciELO - Scientific Electronic Library Online

vol.90 issue3Brazilian fruit processing, wastes as a source of lipase and other biotechnological products: a reviewProduction of lipolytic enzymes by bacteria isolated from biological effluent treatment systems author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Anais da Academia Brasileira de Ciências

Print version ISSN 0001-3765On-line version ISSN 1678-2690


SAMOJEDEN, CAROLINE G. et al. Light environment influences the flood tolerance in Cordia americana (L.) Gottschling & J.S.Mill. An. Acad. Bras. Ciênc. [online]. 2018, vol.90, n.3, pp.2945-2953. ISSN 0001-3765.

The subtropical riverine forests present a variation in soil water availability throughout the year, following precipitation seasonality. The objective of this work was to evaluate the responses of Cordia americana to different light intensities combined with soil flooding. Seedlings were acclimated to light treatments, with full sun and shade conditions. Sun and shade plants were subjected to soil flooding during periods of 10 (short) and 30 (longer) days. After 10 days, flooded plants had a higher root dry mass accumulation and soluble sugars content, regardless of the light condition. Shade plants presented higher shoot soluble sugars content in relation to the sun plants. After 30 days, a higher shoot soluble sugar content was observed in sun and shade flooded plants. In addition, a higher root soluble sugar content was also observed in sun plants under flood. Periods of short flooding, characterized in subtropical forests as from 5 to 15 days, favor the growth of shade plants and the roots sugar accumulation, fact that can explain the species distribution. However, long periods of flooding may be associated with light environment plasticity, suggesting that the sun plants present a higher flooding tolerance, directly associated with the ability to maintain the sugar content.

Keywords : subtropical climate; soluble sugars; understory; water stress.

        · text in English     · English ( pdf )