Absorption of Photosynthetically Active Radiation, Radiation Use Efficiency and Spectral Reflectance of Bracken [Pteridium aquilinum (L.) Kuhn] Canopies
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چکیده
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 کاملIntercepted Photosynthetically Active Radiation Estimated by Spectral Reflectance
Interception of photosynthetically active radiation (PAR) was evaluated relative to greenness and normalized difference [MSS (7 5)/(7 + 5)] for five planting dates of wheat for 1978-79 and 1979-80 at Phoenix, Arizona. Intercepted PAR was calculated from leaf area index and stage of growth. Linear relationships were found with greenness and normalized difference with separate relationships descr...
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 کاملevaluation of radiation absorption and radiation use efficiency of intercropping of sweet basil and bean
intercropping may be helpful manner to increase interception and utilization. the aim of this study was to compare radiation use efficiency and radiation interception in intercropping with sole cropping. an experiment was conducted at the agricultural research station, ferdowsi university of mashhad in the growing season of the year 2008. the experimental treatments were: 1- sole crop of bean 2...
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ژورنال
عنوان ژورنال: Annals of Botany
سال: 2000
ISSN: 0305-7364,1095-8290
DOI: 10.1093/oxfordjournals.aob.a010317