| in vitro determination of the spermicidal activity of plant saponins. | the plant kingdom might yield an effective antifertility drug. a mentha arvensis l. (labiatae) fraction with uterotonic activity was isolated, and was found to be active on the nonpregnant as well as the pregnant rat uterus. according to folklore medicine, the mexican plant montanoa tomentosa cerv. (zoapatle) possesses antifertility activity in women. the effect of various isolated preparations from this plant on early pregnancy were investigated in serveral rodent species including the mouse ... | 1985 | 4080814 |
| immediate skin and mucosal symptoms from pot plants and vegetables in gardeners and greenhouse workers. | short-lived occupational skin symptoms of irritant or urticarial nature were commonly reported among 253 attendants in a clinical study on occupational dermatitis in danish gardeners and greenhouse workers. aimed prick or scratch-patch testing for immediate skin and mucosal symptoms was performed in 105 persons with plants as is. 35 persons (33%) had at least 1 positive reaction and a family history of, or personal, atopy was significantly more prevalent among these compared to attendants with n ... | 1998 | 9817221 |
| a comparison of early floral ontogeny in wild-type and floral homeotic mutant phenotypes of primula. | primula flowers are heteromorphic with individual plants producing either pin-form or thrum-form flowers. we have used scanning electron microscopy to observe early development of wild-type flowers of primrose (primula vulgaris), cowslip (p. veris), and the polyanthus hybrid (p. x tommasinii x p. vulgaris). floral ontogeny in primula is different from that observed in the well-studied models antirrhinum majus and arabidopsis thaliana and our studies reveal morphological landmark events that defi ... | 2003 | 12687358 |
| molecular characterization of dna sequences from the primula vulgaris s-locus. | primula species provide possibly the best known examples of heteromorphic flower development and this breeding system has attracted considerable attention, including that of charles darwin. however, despite considerable recent advances in molecular genetics, nothing is known about the molecular basis of floral heteromorphy. the first molecular marker for the primula s-locus is reported here. this dna sequence was identified by random amplification of polymorphic dna (rapd)-pcr, further defined a ... | 2005 | 15723823 |
| analysis of late stage flower development in primula vulgaris reveals novel differences in cell morphology and temporal aspects of floral heteromorphy. | heterostyly in primula is characterized by the development of long-styled pin and short-styled thrum flowers, with anthers midway down the corolla tube in pin flowers, and at its mouth in thrum flowers. other differences include pollen size and stigmatic papillae length. several linked genes at the s locus control these differences. in this study we have analyzed pin and thrum flowers through the temporal development of heteromorphy.these studies indicate that the s locus linked genes that orche ... | 2006 | 16866961 |
| biological screening of some turkish medicinal plant extracts for antimicrobial and toxicity activities. | screening of antibacterial activity and toxicity of 22 aqueous plant extracts from 17 turkish plants was conducted. antibacterial activity was performed with six bacteria including escherichia coli, pseudomonas aeruginosa, klebsiella pneumoniae, streptococcus pyogenes, staphylococcus aureus and staphylococcus epidermidis. extracts of tussilago farfara leaves, helichyrsum plicatum flowers, solanum dulcamara aerial parts and urtica dioica leaves gave the best inhibitory activity against s. pyogene ... | 2008 | 18075897 |
| the s locus-linked primula homeotic mutant sepaloid shows characteristics of a b-function mutant but does not result from mutation in a b-function gene. | floral homeotic and flower development mutants of primula, including double, hose in hose, jack in the green and split perianth, have been cultivated since the late 1500s as ornamental plants but until recently have attracted limited scientific attention. here we describe the characterization of a new mutant phenotype, sepaloid, that produces flowers comprising only sepals and carpels. the sepaloid mutation is recessive, and is linked to the s locus that controls floral heteromorphy. the phenoty ... | 2008 | 18564384 |
| genetic signs of connectivity in primula vulgaris (primulaceae) in a hedgerow network landscape. | the effects of landscape configuration on the genetic connectivity of the heterostylous species primula vulgaris huds. (primulaceae) were studied using aflp markers. isolation by distance pattern was shown by spatial autocorrelation analysis; moreover, hedgerow network distances were found to contribute less than euclidian distances to spatial genetic structure. pollen flow is probably the main factor shaping the spatial genetic structure rather than seed dispersal, which is limited in this myrm ... | 2009 | 19523605 |
| hose in hose, an s locus-linked mutant of primula vulgaris, is caused by an unstable mutation at the globosa locus. | hose in hose mutants of primrose and cowslip have been cultivated since the early 17th century and show dominant homeotic conversion of sepals to petals. the phenotype shows variable penetrance and expressivity and is linked to the s locus, which controls floral heteromorphy in primula species. here we demonstrate that the homeotic conversion of sepals to petals in hose in hose is associated with up-regulation of both primula b-function mads box genes pvdef and pvglo in the first floral whorl. w ... | 2010 | 20212126 |
| floral heteromorphy in primula vulgaris: progress towards isolation and characterization of the s locus. | background the common primrose, primula vulgaris, along with many other species of the primulaceae, exhibits floral heteromorphy in which different individuals develop one of two possible forms of flower, known as pin and thrum. both flower types are hermaphrodite and exhibit reciprocal positions of male and female reproductive structures, which together with a sporophytic incompatibility system, prevent self-pollination and promote out-crossing. the development of the two different forms of flo ... | 2011 | 21803742 |