Fisiologia pós-colheita de frutos das palmeiras syagrus oleracea (mart.)Becc. e Mauritia vinifera Mart.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

Many aspects of post harvest changes on fruits of two native palm species of Central Plateau of Centralwestern Brazil where studied. The species Syagrus oleracea (Mart) Becc. known as gueroba and the Mauritia vinifera Mart. commonly known as buriti where evaluated in aspects such as loss of weight, changes of pulp and skin color, internal gaseous volumes, internal concentration of CO2 and O2, water vapor conductance, firmness, chilling injury and CO2 and ethylene evolution. S.oleracea and M.vinifera fruits are sensible of chilling injury and when stored at low temperature such as 8C they failed to ripe. M.vinifera fruit stored on high humidity chambers, subjected to low transpiration rate kept their integrity for as long as three times the storage life of the fruits that were held on low humidity chambers (65 to 85%). The hard peel of M.vinifera fruits looses its tight and perfect scale arrangement during ripening and chilling injury, and this causes a tremendous increase in the water vapor and other gases conductance from its internal atmosphere. In M.vinifera fruits the curves of internal CO2 and O2 are an evidence of the formation of openings in the hard peel scales, possibly at the beginning of climacteric rise. The climacteric peak of CO2 on M.vinifera fruits has occurred two days after the ethylene peak, differently of S.oleracea fruits where these two peaks have occurred simultaneously. In S.oleracea fruits the curves of internal concentrations of CO2 and O2 are evidences that these are a climacteric fruit. The gaseous intercellular volumes that were obtained for S.oleracea fruits put them among other organs with medium quantity of these volumes, which means that they may have low susceptibility for impact injury and a high susceptibility for compression injury. In the case of M.vinifera fruits, the low intercellular gaseous volumes found express that these fruits have a high susceptibility for impact injury and that they have a tendency of splitting or ungluing their hard peel dermal scales. They also have a low susceptibility for compression injury while they are still firm with a light brown peel color.

ASSUNTO(S)

botanica syagrus oleracea gasosos intercelulares mauritia vinifera amadurecimento buriti gueroba

Documentos Relacionados