Oxygen requirement of root meristems in diploid and autotetraploid rye
نویسندگان
چکیده
منابع مشابه
Niche divergence between diploid and autotetraploid Tolmiea.
PREMISE OF STUDY Polyploidy is common in eukaryotes and is of major evolutionary importance over both short and long time-scales. Compared to allopolyploids, autopolyploids remain understudied; they are often morphologically cryptic and frequently remain taxonomically unrecognized, although there is increasing recognition of the high frequency of autopolyploidy in angiosperms. While autopolyplo...
متن کاملOppositional Allelism in Diploid and Autotetraploid Trifolium Hybridum L.
HE selfand cross-incompatibilities of a number of obligately cross-polliT nated species of flowering plants are genetically determined by series of multiple oppositional alleles. The oppositional or personate incompatibility system was first described, with substantiating data, by EAST and MANGELSDORF (1925) for Nicotiana species. The existence of oppositional alleles has been subsequently demo...
متن کاملSelection for phenotypic divergence between diploid and autotetraploid Heuchera grossulariifolia.
Much of the diversity of flowering plants is associated with genomic duplication through polyploidy. Little is known, however, about the evolutionary mechanisms responsible for the diversification of novel polyploid lineages. We evaluated the possibility that divergence is driven by natural selection by estimating the strength of phenotypic selection acting on three floral traits in sympatric p...
متن کاملEvaluation of oxygen requirement in patients during fiberoptic bronchoscopy
Background: Sometimes oxygen is given to patients during fiberoptic bronchoscopy to prevent arterial hypoxemia, but oxygen usually is given to patients with SPO2 less than 90%. The purpose of this study was to evaluate the patient's oxygen requirement according to SPO2 and its relationship with Pulmonary Function Test (PFT). Methods: From January 2006 to April 2007, 146 patients who needed fibe...
متن کاملMeristems: The Root of Stem Cell Regulation
The stem cells from which the plant body develops are located in shoot and root meristems, and new research shows that the balance between proliferation and differentiation in each is controlled by related proteins that interact in a similar feedback network.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Hereditas
سال: 2009
ISSN: 0018-0661
DOI: 10.1111/j.1601-5223.1972.tb00994.x