Artículos de revistas
Light environment influences the flood tolerance in Cordia americana (L.) Gottschling & JSMill
Fecha
2018-07-01Registro en:
Anais Da Academia Brasileira De Ciencias. Rio Janeiro: Acad Brasileira De Ciencias, v. 90, n. 3, p. 2945-2953, 2018.
0001-3765
10.1590/0001-3765201820170723
S0001-37652018000602945
WOS:000446296800032
S0001-37652018000602945.pdf
Autor
Univ Reg Integrada Alto Uruguai & Missoes
Universidade Estadual Paulista (Unesp)
Institución
Resumen
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.