As dunas do Abaeté localizam-se no limite dos municípios de Salvador e Lauro Freitas, a ca. 12º56' S 38º21’W. O ecossistema das apresenta problemas para sobrevivência plantas, devido à escassez nutrientes vários fatores que influem negativamente balanço hídrico, como baixa capacidade retenção água solo, forte ação ventos marinhos, elevadas salinidade insolação. Apesar disto, flora elevada diver...

The family Gramineaee, due to its great number of species and worldwide distribution, is one of the large and well- known family in the plant kingdom. All the species in this family are homotypes and are found wherever plant growth is possible. At present, more than 10,000 species in 620 genera belonging to 60 tribes of this family are known from all over the world. In Iran, besides many resear...

       Seed dormancy has an important role in resistance and survival mechanisms of plants. Finding of some information about the range of primary dormancy and effective factors in dormancy breaking and optimal conditions of seed germination are necessary for weed control and other research purposes.  In this research, the seeds of 10 species of grass weeds in Tehran province fields (Echinocloa...