Conservation of marizeiro Geoffroea spinosa Jacq. seeds using different packagings and environments

Abstract

O marizeiro ( Geoffroea spinosa Jacq.) \ue9 uma esp\ue9cie florestal importante, sobretudo por ser adaptada \ue0s condi\ue7\uf5es de matas ciliares do semi-\ue1rido e ecossistemas associados, ocorrendo em vastas \ue1reas do Nordeste brasileiro e no vale do rio S\ue3o Francisco, sempre restrita a ambientes sazonalmente inundados. Este trabalho teve como objetivos avaliar o efeito de diferentes tipos de embalagens e do per\uedodo de armazenamento sobre o processo germinativo e o vigor de sementes de Geoffroea spinosa Jacq. acondicionadas tamb\ue9m em diferentes ambientes. O experimento foi instalado no Laborat\uf3rio de Ecologia Vegetal do CCA/UFPB, seguindo um delineamento inteiramente casualizado. As sementes foram distribu\ueddas em dois ambientes (condi\ue7\uf5es naturais, no laborat\uf3rio e c\ue2mara fria), acondicionadas em dois tipos de embalagens (sacos de papel e sacos pl\ue1sticos) durante cinco per\uedodos de armazenamento: 0, 15, 30, 60 e 90 dias. Foram avaliados o teor de \ue1gua, o \uedndice de velocidade de emerg\ueancia, a massa seca e o comprimento de pl\ue2ntulas. Os dados foram submetidos \ue0 an\ue1lise de regress\ue3o polinomial. Na embalagem pl\ue1stica e no ambiente de c\ue2mara fria, houve menor redu\ue7\ue3o da viabilidade e do vigor ao longo do armazenamento. As sementes acondicionadas em sacos de papel e armazenadas em ambiente de laborat\uf3rio perderam rapidamente a viabilidade e o vigor a partir dos 30 dias de armazenamento.Geoffroea spinosa Jacq., commonly known as marizeiro in Brazil, is an important tree species, mainly because it is adapted to riparian forest conditions in semi-arid and associated ecosystems. The species occur in large areas of northeastern Brazil and in the S\ue3o Francisco river valley, always restricted to seasonally flooded environments. This study aimed to evaluate the effect of different types of packaging and storage periods, as well the influence of environments on the process of seed germination and vigor of Geoffroea spinosa. The experiment was carried out at the Laboratory of Plant Ecology - CCA/UFPB, following a completely randomized design. The seeds were distributed among two environments (natural conditions in the laboratory and cold room), packed in two types of packaging (paper bags and plastic bags) for five periods of storage: 0; 15; 30; 60 and 90 days. Water content, the emergence velocity index, dry weight and length of seedlings were evaluated. The data were submitted to a polynomial regression analysis. In plastic packaging and the environment of the cold room there was less reduction of viability and vigor during storage. Seeds packed in paper bags and stored in a laboratory rapidly lost viability and vigor, after 30 days of storage