Germination, carbohydrate composition and vigor of cryopreserved Caesalpinia echinata seeds

AUTOR(ES)

Zanotti, Rafael Fonsêca, Motta, Ludymila Brandão, Bragatto, Juliano, Labate, Carlos Alberto, Salomão, Antonieta Nassif, Vendrame, Wagner A., Cuzzuol, Geraldo Rogerio Faustini

FONTE

Braz. arch. biol. technol.

DATA DE PUBLICAÇÃO

2012-10

RESUMO

The present study investigated the germination and vigor of Caesalpinia echinata (Brazilwood) seeds stored at negative temperatures. Recently harvested seeds were cryopreserved at -18º or -196ºC and periodically evaluated for germination, seed vigor and carbohydrate composition. The temperatures did not influence the germination percentages or vigor. The germination percentage decreased from 88% in recently harvested seeds to 60% after 730 days of storage. The different temperature and storage times tested did not affect the vigor seed germination as indicated by the measures of plant growth and survival. The different temperatures used did not cause changes in the carbohydrate composition. The tegument cell walls were rich in lignin, arabinose and xylose. The cytoplasm of the cotyledons and embryos had high levels of glucose, fructose, and sucrose. The cryopreservation technique here presented was effective in the conservation of Brazilwood seeds for the medium term.

Documentos Relacionados

• Relações entre termoterapia, germinação, vigor e sanidade de sementes de tomate
• Germination, vigor of seeds and growth of tomatos seedlings in different nutritional conditions
• Germination and vigor of soybean genotypes seeds under saline stress
• Storage sites in seeds of Caesalpinia echinata and C. ferrea (Leguminosae) with considerations on nutrients flow
• Metabolically Active Glucosides in Oleaceae Seeds: I. The Effects of Germination, Growth, and Hormone Treatments