We have shown previously that inositol-1,4,5-trisphosphate (IP(3)) stimulates an efflux of (45)Ca(2+) from fusogenic carrot protoplasts (M Rincón, WF Boss [1987] Plant Physiol 83: 395-398). In light of these results, we suggested that IP(3) might serve as a second messenger for the mobilization of intracellular Ca(2+) in higher plant cells. To determine whether or not IP(3) and other inositol p...

It is well known that some reducing substances, resembling true sugars in their behavior, occur almost invariably in plant extracts and may introduce great errors into the estimation of those sugars. Since the soluble sugars commonly present in plants (glucose, fructose, sucrose and maltose) are easily fermented by yeast, this phenomenon suggests itself as a convenient and practicable method fo...

Hormetic morphogens are morphogens such as transforming growth factor beta (TGF-β) in mammals and auxin in plants that induce hormetic responses. For example, in vitro, TGF-β stimulates and inhibits cell proliferation at low and high concentrations respectively. I developed a model of hormetic morphogen gradient control of the morphogenesis of the fusion of bilateral aortic precursors (Anlagen)...

Carrot (Daucus carota L.) belongs to the group of common edible vegetables. The aim of the present study was to establish the distribution of guaiacol peroxidases in carrot root sections as well as to determine the enzymatic activity and the electrophoretic pattern of isoperoxidases in tissue extracts of particular root regions: central cylinder, inner cortex and epidermis, including the periph...