SciELO - Scientific Electronic Library Online

 
vol.35 issue6Confidence limits to variables in seeds analysis of exotic forest species author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Revista Árvore

Print version ISSN 0100-6762

Abstract

MARTINEZ, Gladys Beatriz; MOURAO, Moisés  and  BRIENZA JUNIOR, Silvio. Morphophysiological responses of açacu (Hura crepitans L.) plants from Amazon river floodplains: anoxic soil effects. Rev. Árvore [online]. 2011, vol.35, n.6, pp. 1155-1164. ISSN 0100-6762.  http://dx.doi.org/10.1590/S0100-67622011000700001.

It was evaluated in this study the morpho-physiological responses of seedlings of açacu (Hura crepitans) in anoxic soil at different ages (90 and 120 days) and periods of flooding (0, 10, 20 and 30 days). The study found that the seedlings developed adaptive mechanisms (morphological structures such as hypertrophic lenticels and adventitious roots) and showed physiological behavior which resulted anoxia tolerance. The responses of plants excess of water in the soil included inhibition of vegetative growth, chlorosis and leaf senescence. Soil water stress affected negatively the viability of seedlings at 90 days of age whereas açacu plants at 120 days of age were tolerant to flooding..

Keywords : Amazonian floodplain; Anoxia; Forest species.

        · abstract in Portuguese     · text in Portuguese     · pdf in Portuguese