Objective: To determine the stigma receptivity and pollen viability in order to make manual crosses obtain viable progeny castor bean (Ricinus communis L.).Design/Methodology/Approach: Pollen tests were made on breeding materials by staining with acetocarmine solution. In elite materials, of was evaluated hydrogen peroxide. From inflorescences, male ones removed female preserved, which covered ...

medical plants are adapted to different kinds of dormancy to survive in the worst situations. regarding to ecological viewpoint, this kind of adaptation is very important in respect to restriction of genetic draft and decrease of genetic resource of medicinal plants. this leads to plant survival even after prolonged drought. since some of them are endangered species and in the other hand increa...