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Revista Brasileira de Sementes

Print version ISSN 0101-3122

Abstract

BRASILEIRO, Beatriz Gonçalves; BHERING, Maria Carmen; VIDIGAL, Deborah De Souza  and  CASALI, Vicente Wagner Dias. Morfological characterization and germination of jalapa seeds (Operculina macrocarpa (L.)Urb.). Rev. bras. sementes [online]. 2009, vol.31, n.3, pp. 78-86. ISSN 0101-3122.  http://dx.doi.org/10.1590/S0101-31222009000300009.

The objective of this study was to evaluate the presence of tegumentar dormancy and identify pre-germination treatments that can unify and accelerate the germination and know the morphology of the seminal development in post-seed of Operculina macrocarpa. The seeds were subjected to the following pre-germination treatments: immersion in water for 1 hour; immersion in hypochlorite solution for 1 hour and the control, represented by seeds without pretreatment. Germination and emergence tests were conducted with four replications of 25 and 20 seeds, carried out in the laboratory and greenhouse, respectively. Evaluations were conducted daily, for 30 days and the percentage of normal seedlings (15 and 30 days) and the rate of speed germination/emergency were calculated. The germination of Operculina macrocarpa is epigeous-phanerocotylar and the seed, although it has a hard seed coat, was not shown to be impermeable to water and thus does not require pre-germination treatments.

Keywords : Dormancy; Operculina macrocarpa (L.) Urb.; teguments; medicinal plant.

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