Maturation of Eugenia pyriformis seeds under different hydric and thermal conditions

Anais da Academia Brasileira de Ciências

Edmir V. Lamarca¹  Juliana S. Prataviera¹  Igor F. Borges¹  Liliana F. Delgado¹  Carmen C. Teixeira¹  Marcelo B.p. De Camargo¹  José M.r. Faria¹  Claudio J. Barbedo¹ 

关键词: dispersal;    development;    degree-day;    rainfall;    recalcitrants seeds;    dispersão;    desenvolvimento;    graus-dia;    precipitação pluvial;    sementes recalcitrantes;   

DOI  :  10.1590/S0001-37652013005000006

来源: SciELO

【 摘 要 】

This study aims to analyze the maturation and dispersal of Eugenia pyriformis Cambess. seeds produced in different years, and the influence of variation in thermal and hydric environment on seed physical and physiological characteristics at dispersal. Fruits at different developmental stages were harvested in the city of São Paulo between 2003 and 2010, as well as in the cities of Campinas and Lavras, in 2009 and 2010 and analyzed for size and color. The seeds were extracted from the fruits and their dry mass, water content, germination and vigor were assessed. Results showed that seed maturation is unsynchronized to the maturation of the fruit, taking 45 days on average (430 growing degree-days), longer in rainy times or lower temperatures. Seeds with higher physiological quality were produced in rainy years and when the temperature range was larger. We concluded therefore that hydric and thermal environmental variations during development influence the maturation of Eugenia pyriformis seeds and are able to determine the formation cycle and the final seed quality.

【 授权许可】

CC BY   
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