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| Web URL(s): | http://www.jstor.org/stable/2485048
Last checked: 05/21/2009
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Bradshaw, A. D. |
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| Author Affiliation: | Department of Agricultural Botany, University College of North Wales, Bangor, Caerns, United Kingdom |
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| Title: | Population differentiation in Agrostis tenuis Sibth. : III. Populations in varied environments |
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| Article Series: | Population differentiation in Agrostis tenuis Sibth |
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| Source: | New Phytologist. Vol. 59, No. 1, April 1960, p. 92-103. |
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| Publishing Information: | Oxford, England: Blackwell Publishing, for the New Phytologist Trust |
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| # of Pages: | 12 |
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| Keywords: | TIC Keywords: Agrostis tenuis; Tillers (vegetative); Environmental factors; Cold resistance; Population dynamics; Habitats; Lead; Differentiation
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| Abstract/Contents: | "In order to investigate the physiological differentiation occurring within a species, samples of sixty tillers of a number of populations of Agrostis tenuis were transplanted into experimental plots established in various contrasting natural habitats in the neighbourhood of Aberystwyth in central Wales. Two populations were also grown on lead-contaminated soil. Their performance under the different environments was examined. It was found that: (i) Populations originating from contrasting habitats differed considerably in their ability to tolerate different extreme conditions. For instance, the growth of lowland populations in the upland plot was seriously affected by winter conditions, and the growth of upland populations in the coastal plot was affected by salt storm spray. The population from a lead mine was able to grow in lead-contaminated soil, while the population from normal pasture was not. The behaviour of each population could always be related to the environment from which the population originated. (ii) These differences were also found, although on a smaller scale, between populations originating from less contrasting environments. (iii) Populations originating from habitats only a short distance apart showed considerable differences in performance in those cases where the original habitats were markedly different. (iv) Such physiological differentiation was not necessarily accompanied by morphological differentiation. It is likely that this is because the two types of differentiation are in relation to unrelated factors of the environment. It was concluded that the pattern of physiological differentiation was a graded patchwork similar to the pattern of morphological differentiation previously described." |
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| Language: | English |
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| References: | 15 |
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| See Also: | See also Part 1, "Population differentiation in Agrostis tenuis Sibth I. Morphologica differentiation" New Phytologist, 58(2) October 1959, p. 208-227 R=9360 R=9360
See also Part 2, "Population differentiation in Agrodtid tenuis Sibth. II. The incidence and significance on infection by Epichole typina" New Phytologist, 58(3) December 1959, p. 310-315 R=84367 R=84367 |
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| Note: | Summary as abstract
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bradshaw, A. D. 1960. Population differentiation in Agrostis tenuis Sibth. : III. Populations in varied environments. New Phytol. 59(1):p. 92-103. |
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Last checked: 05/21/2009
Access conditions: Item is within a limited-access website |
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MSU catalog number: QK 1 .N38 |
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