Maturation of Eugenia pyriformis seeds under different hydric and thermal conditions

Autor(es)

Edmir V. Lamarca ^[1] ; Juliana S. Prataviera ^[2] ; Igor F. Borges ^[3] ; Liliana F. Delgado ^[1] ; Carmen C. Teixeira ^[4] ; Marcelo B.P. de Camargo ^[5] ; José M.R. Faria ^[7] ; Claudio J. Barbedo ^[7]

Afiliação do(s) autor(es)

^[1] Inst Bot, Programa Posgrad Biodiversidade Vegetal & Meio Am, BR-04301012 Sao Paulo - Brazil

^[2] Prataviera Consultoria, BR-45983000 Prado, BA - Brazil

^[3] Dow AgroSci Regulatory Sci & Govt Affairs, BR-04794000 Sao Paulo - Brazil

^[4] Univ Estadual Paulista UNESP, Inst Biociencias, Programa Posgrad Ciencias Biol, BR-18618970 Botucatu, SP - Brazil

^[5] Inst Agron Campinas, Ctr Ecofisiol & Biofis, BR-13075630 Campinas, SP - Brazil

^[6] Universidade Federal de Lavras. Departamento de Ciências Florestais - Brasil

^[7] Nucleo Pesquisas Sementes, Inst Bot, BR-04301012 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Anais da Academia Brasileira de Ciências; v. 85, n. 1, p. 223-233, 2013-03-01.

Resumo

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. (AU)

• Processo FAPESP: 05/04139-7 - Carboidratos de plantas tropicais como moduladores de processos ecofisiológicos e indicadores de respostas a estresses ambientais
• Beneficiário: Marcia Regina Braga
• Modalidade de apoio: Auxílio à Pesquisa - Temático