Perfect flowers of Maytenus obtusifolia have partial sterility of pollen grains, resulting in collapsed and developed free microspores. However, the cellular events resulting in partial male sterility have not been determined. In pistillate flowers of this species, male sterility is related to the
Pristimerin has been shown to be cytotoxic to several cancer cell lines. In the present work, the cytotoxicity of pristimerin was evaluated in human tumor cell lines and in human peripheral blood mononuclear cells (PBMC). This work also examined the effects of pristimerin (0.4; 0.8 and 1.7 microM)
In Brazil, dieback and necrosis of leaves and berries of coffee trees (Coffea arabica and C. canephora) are common symptoms of anthracnose disease caused by Colletotrichum gloeosporioides (Penz.) Sacc. In April 2010, these symptoms were observed in 100% of the plants from different coffee
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