Results 11 to 20 of about 51,734 (306)

THE ECOTYPE CONCEPT [PDF]

open access: yesNew Phytologist, 1946
The ecotype concept (Turesson, 1922) is a population concept, and by definition an ecotype is an intraspecific product of environmental selection arising as a result of genotypic response to a particular habitat. Accordingly, before a population qualifies for ecotype status, a relationship must be demonstrated between its heredity and the prevailing ...
J. W. Gregor, Patricia J. Watson
openaire   +3 more sources

Changes in Antioxidant Enzymes Activity and Oxidative Damage in Four Argania spinosa Ecotypes Under Water Stress Conditions [PDF]

open access: yes, 2011
_Argania spinosa_ L. Skell, a tree endemic of Morocco, grows in semiarid and arid areas. Biochemical response to drought in four ecotypes of the _A. spinosa_ was compared.
Abdelghani Chakhchar   +4 more
core   +2 more sources

Fruit production from Opuntia ficus-indica ecotypes in comparison to commercial Italian clones [PDF]

open access: yes, 2018
Fruit production, as an elementary chemical characteristic of the fruit, was evaluated in 16 Opuntia ficus-indica Portuguese ecotypes cultivated in a marginal soil without tillage, in the second and third years after plantation. The O.
Gazarini, Luiz   +2 more
core   +2 more sources

Highly replicated evolution of parapatric ecotypes [PDF]

open access: yesMolecular Biology and Evolution, 2020
Abstract Parallel evolution of ecotypes occurs when selection independently drives the evolution of similar traits across similar environments. The multiple origin of ecotypes is often inferred on the basis of a phylogeny which clusters populations according to geographic location and not by the environment they ...
Maddie E. James   +5 more
openaire   +5 more sources

Effects of Rate of Drying, Life History Phase, and Ecotype on the Ability of the Moss Bryum Argenteum to Survive Desiccation Events and the Influence on Conservation and Selection of Material for Restoration [PDF]

open access: yes, 2019
Desiccation stress is frequently experienced by the moss Bryum argenteum and can influence survival, propagation and niche selection. We attempted to disentangle the interacting factors of life history phase (five categories) and rate of desiccation ...
Chiquoine, Lindsay P.   +2 more
core   +2 more sources

Ecotypes of the Mycobacterium tuberculosis complex [PDF]

open access: yesJournal of Theoretical Biology, 2006
A phylogeny of the Mycobacterium tuberculosis complex has recently shown that the animal-adapted strains are found in a single lineage marked by the deletion of chromosomal region 9 (RD9) [Brosch et al., 2002. A new evolutionary scenario for the Mycobacterium tuberculosis complex. Proc. Natl Acad. Sci. USA 99 (6), 3684-3689].
Smith, Noel H   +8 more
openaire   +3 more sources

Studies upon morhological and biological traits of Festuca rubra, subsp.fallax (Poaceae)

open access: yesActa Agrobotanica, 2013
Observation and measurements of some traits of Festuca rubra L., subsp. fallax (Thuill.) Hack. ecotypes were made in 1995-1997 using samples selected from natural habitats and collected in Grassland Experimental Station in Sosnowica. High differentiation
Bogusław Sawicki
doaj   +1 more source

Bacterial but Not Fungal Rhizosphere Community Composition Differ among Perennial Grass Ecotypes under Abiotic Environmental Stress

open access: yesMicrobiology Spectrum, 2022
Environmental change, especially frequent droughts, is predicted to detrimentally impact the North American perennial grasslands. Consistent dry spells will affect plant communities as well as their associated rhizobiomes, possibly altering the plant ...
Soumyadev Sarkar   +12 more
doaj   +1 more source

Temperature, light and nitrate sensing coordinate Arabidopsis seed dormancy cycling resulting in winter and summer annual phenotypes [PDF]

open access: yes, 2013
Seeds use environmental cues to sense the seasons and their surroundings to initiate the plants life cycle. Dormancy cycling underlying this process is extensively described, but the molecular mechanism is largely unknown.
Clay, Heather A.   +4 more
core   +1 more source

Reproductive Activity of Tsigaie Sheep Belonging to the Hill and Mountain Ecotypes

open access: yesScientific Papers Animal Science and Biotechnologies, 2023
The reproductive value of sheep belonging to the hill and mountain ecotypes of the Tsigaie breed was characterized based on the analysis of specific indexes.
Vasile Miclea   +4 more
doaj  

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