نتایج جستجو برای: cold stratification
تعداد نتایج: 135404 فیلتر نتایج به سال:
To understand germination timing in an ecological context, the response to environmental events that affect seed dormancy is central, and has to be combined with knowledge of germination responses to different circumstances. In this study, seed dormancy, germination, and emergence phenology of six annual co-occurring weedy Asteraceae species were investigated. Three pre-treatments (warm and col...
la sociolinguistique est la partie de la linguistique ayant pour objet l’étude du langage sous son aspectsocioculturel. william labov est considéré dans la tradition anglo-saxonne, comme le fondateur de la sociolinguistique modern. c’est lui qui, en 1966, publie “the social stratification of english in new york city” ( la stratification social de l’anglais à new york). la recherche sociolingu...
Upwelling indices are commonly calculated using wind stress measurements [1]. They describe the physical process which causes upwelling but may not accurately predict the presence or absence of cold, nutrient rich, upwelled water reaching the surf zone. Cold, nutrient-rich, upwelled water plays an important role in surf zone ecosystems and therefore needs to be quantified. Here a daily coastal ...
Sea temperature structures are important for water stratification and marine ecosystems. In the coastal of Muping, China, stationary measurements sea captured temporal changes during two summer storm events. The north component wind storms was opposite. responded differently to directions in A well-validated numerical ocean model used investigate mechanism variation coast Muping. revealed that ...
The occurrence of various species of Brassicaceae with indehiscent fruits in the cold deserts of NW China suggests that there are adaptive advantages of this trait. We hypothesized that the pericarp of the single-seeded silicles of Isatis violascens restricts embryo expansion and thus prevents germination for 1 or more years. Thus, our aim was to investigate the role of the pericarp in seed dor...
Seeds from 30 species of grasses and forbs native to Pacific Northwest prairies were tested for physical and physiological dormancy. The physical dormancy was determined by mechanically and chemically scarifying seeds. Physiological dormancy was evaluated with cold stratification before germination. Experiments were analyzed individually with ANOVA analysis, and by seed lots through time using ...
Response of the North Atlantic surface and intermediate ocean structure to climate warming of MIS 11
Investigating past interglacial climates not only help to understand how the climate system operates in general, it also forms a vital basis for climate predictions. We reconstructed vertical stratification changes in temperature and salinity in the North Atlantic for a period some 400 ka ago (MIS11), an interglacial time analogue of a future climate. As inferred from a unique set of biogeochem...
Abstract
 Aim of study: The effects cold stratification, storage and gibberellic acid (GA3) on seed germination bilberry (Vaccinium myrtillus L.) were investigated. 
 Area Ripe berries V.myrtillus collected from the Kaz Mountains (İda Mount) National Park-Balıkesir province in Turkey. Material methods: In study five levels moist stratification period, dry period (control, 15, 30, 60, ...
The occurrence of various species of Brassicaceae with indehiscent fruits in the cold deserts of NW China suggests that there are adaptive advantages of this trait. We hypothesized that the pericarp of the single-seeded silicles of Isatis violascens restricts embryo expansion and thus prevents germination for 1 or more years. Thus, our aim was to investigate the role of the pericarp in seed dor...
This study was carried out to determine effects of different durations (20, 40, 60 days and control) of cold stratification treatments on seed germination and to overcome dormancy in seeds of twelve different drought tolerant plants. The species used in this study were Arbutus andrachne L., Cistus creticus L., Colutea armena Bois. Huet., Cotinus coggygria Scop., Cotoneaster numullaria Fisch. an...
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