نتایج جستجو برای: tragopogon
تعداد نتایج: 175 فیلتر نتایج به سال:
Nearly four decades ago, Roose & Gottlieb (Roose & Gottlieb 1976 Evolution 30, 818-830. (doi:10.2307/2407821)) showed that the recently derived allotetraploids Tragopogon mirus and T. miscellus combined the allozyme profiles of their diploid parents (T. dubius and T. porrifolius, and T. dubius and T. pratensis, respectively). This classic paper addressed the link between genotype and biochemica...
The predictability of evolution is debatable, with recent evidence suggesting that outcomes may be constrained by gene interaction networks [1]. Whole-genome duplication (WGD; polyploidization-ubiquitous in plant evolution [2]) provides the opportunity to evaluate the predictability of genome reduction, a pervasive feature of evolution [3, 4]. Repeated patterns of genome reduction appear to hav...
Ivan Petrovich Pavlov was the first physiologist to win the Nobel Prize. The Prize was given in 1904 for his research on the neural control of salivary, gastric, and pancreatic secretion. A major reason for the success and novelty of his research was the use of unanesthetized dogs surgically prepared with chronic fistulas or gastric pouches that permitted repeated experiments in the same animal...
We analyzed nuclear ribosomal DNA (rDNA) transcription and chromatin condensation in individuals from several populations of Tragopogon mirus and T. miscellus, allotetraploids that have formed repeatedly within only the last 80 years from T. dubius and T. porrifolius and T. dubius and T. pratensis, respectively. We identified populations with no (2), partial (2), and complete (4) nucleolar domi...
Tragopogon buphthalmoides (DC.) Boiss, is widely used as a food additive with some imputed health effects in folk medicine of western Iran. Unfortunately, despite the prevalent medicinal uses of the plant, there are no reports on the toxic effects of T. buphthalmoides aerial parts. The present study evaluated the potential toxicity of dried hydroethanolic extract of the species in wistar rats. ...
Tragopogon kurdicus Safavi & Maroofi به عنوان یک گونه جدید از ایران، کردستان، کوه آوالان، شرح داده میشود. این گونه نزدیک به T. erostris است که گونهای انحصاری ایران بوده و از استانهای کرمانشاه و کردستان گزارش شده است. گونه جدید از گونه T. erostris در داشتن ساقه بلندتر، برگهای بزرگتر، دمگلآذینهای بلندتر، کپههایی با گریبانهای بزرگتر، جقههای بلندتر فندقهها و همچنین فندقههای درازتر با نوک...
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