Fruit dehiscence mechanism and release of dimorphic seeds with different germination properties in Commelina erecta.

Commelina erecta is a successful weed species. The aims of this study were to analyse the morpho-anatomy of the fruit and dimorphic seeds of the weed C. erecta, the dynamics and type of dormancy, and water entry.

Diversity of Naturalized Hairy Vetch ( Roth) Populations in Central Argentina as a Source of Potential Adaptive Traits for Breeding.

Hairy vetch ( ssp. Roth) is native of Europe and Western Asia and it is the second most cultivated vetch worldwide. Hairy vetch is used as forage species in semiarid environments and as a legume cover crop in sub-humid and humid regions.

Germination parameterization and development of an after-ripening thermal-time model for primary dormancy release of Lithospermum arvense seeds.

Background And Aims: Models based on thermal-time approaches have been a useful tool for characterizing and predicting seed germination and dormancy release in relation to time and temperature. The aims of the present work were to evaluate the relative accuracy of different thermal-time approaches for the description of germination in Lithospermum arvense and to develop an after-ripening thermal-time model for predicting seed dormancy release.

Methods: Seeds were dry-stored at constant temperatures of 5, 15 or 24 degrees C for up to 210 d.