An Assessment of Genetic and Environmental Effects on Sporangial Development in Bracken [Pteridium aquilinum (L.) Kuhn] using a Novel Quantitative Method
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منابع مشابه
Isolation of an active glucoside in bracken fern, Pteridium aquilinum.
An active glucoside that enhanced release of histamine from rat peritoneal mast cells was isolated from a toxic fraction of bracken fern, Pteridium aquilinum, by partition column chromatography on Sephadex G-25. It was a yellowish amorphous powder on freeze-drying, readily soluble in water or ethanol, and insoluble in ether. It was hydrolysed with beta-glucosidase to release D-glucose. It was a...
متن کاملTumor induction in germ-free rats fed bracken (Pteridium aquilinum).
This study indicated that there was no significant difference in the incidence of intestinal tumors between germ-free and conventional rats fed a diet containing bracken, suggesting that gut microflora did not play a definite role in bracken tumorigenesis. However, bracken induced exclusively sarcoma but no adenocarcinoma in germ-free rats, whereas it induced predominantly adenocarcinoma in con...
متن کاملBracken (Pteridium aquilinum); the effect of steaming on the nutritive value of bracken hay.
The bracken fern (Pteridium aquilinum) has been known for a long time to be poisonous to cattle (Penberthy, 1893) and horses (Muller, 1897) under farm conditions. Field cases of bracken poisoning in sheep are almost unknown; the more selective feeding habits of sheep may be responsible for their apparent immunity. Bracken poisoning has been experimentally produced in cattle (Almond, I 894), hor...
متن کاملObservations on the Microanatomy of the Spermatozoid of the Bracken Fern (Pteridium aquilinum)
Salient features of structure of the spermatozoid of a fern (Pteridium aquilinum) have been determined by a combination of visual and ultraviolet microscopy, with electron microscopy of shadow-cast whole mounts and thin sections, using magnifications up to but not exceeding 50,000 diameters. Attention has been concentrated on the arrangement rather than on the internal details of the various pa...
متن کاملQuercetin, a rat intestinal and bladder carcinogen present in bracken fern (Pteridium aquilinum).
Albino noninbred weanling male and female rats were fed a basic grain diet (Group 1) or a basic diet supplemented with 33% bracken fern [BF (Group 2)] or 0.1% quercetin [purity, > 99% (Group 3)] for 58 weeks. The quantities of quercetin and kaempferol (a close structural analog) in BF as glycosides were determined to be 0.57 and 1.1 g, respectively, per kg of dried BF. Estimated mean total cumu...
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ژورنال
عنوان ژورنال: Annals of Botany
سال: 2000
ISSN: 0305-7364,1095-8290
DOI: 10.1093/oxfordjournals.aob.a010318