impatiens necrotic spot virus (insv) infects ornamental plants worldwide. it has been reported from almost every ornamental screenhouse in tehran province. insv symptoms include necrotic leaf spot, chlorosis and stunting. heavy losses have been reported from insv in plants such as zinnia elegans, ficus benjamina, viola spp., saintpaulia ioantha, althea spp., cheiranthus cheiri, pelargoniumxhort...

We combine information about the evolutionary history and distributional patterns of the genus Saintpaulia H. Wendl. (Gesneriaceae; 'African violets') to elucidate the factors and processes behind the accumulation of species in tropical montane areas of high biodiversity concentration. We find that high levels of biodiversity in the Eastern Arc Mountains are the result of pre-Quaternary speciat...

Objective: To search for an in vitro strategy to favor both germination and a greater number of seedlings Tillandsia ionantha; also, promote the development future research on this species. Design/methodology/approach: Factor one: lighting conditions (light-dark), factor two: 13 preconditioning treatments, which included storage at room temperature refrigeration 10° C, soaking (12 24 hours), wi...