Evolution and maintenance of pollen-colour dimorphisms in Nigella degenii: habitat-correlated variation and morph-by-environment interactions
(2005) In New Phytologist 168(2). p.487-498- Abstract
- Dimorphism in pollen colour is rare among flowering plants, but occurs in two geographically and morphologically distinct subspecies of Nigella degenii (Ranunculaceae). We evaluated the role of genotype-by-environment interactions in the maintenance of two pollen morphs within each of these subspecies. Morph frequencies in a number of populations were related to current habitat conditions, and an extensive common-garden experiment involving both optimal and stressful conditions (drought and nutrient deficiency) was carried out. The putatively derived (dark) pollen morph of N. degenii ssp. barbro has a higher frequency on slopes facing north or east than on slopes facing south or west. Plants of the dark morph also have a higher mortality... (More)
- Dimorphism in pollen colour is rare among flowering plants, but occurs in two geographically and morphologically distinct subspecies of Nigella degenii (Ranunculaceae). We evaluated the role of genotype-by-environment interactions in the maintenance of two pollen morphs within each of these subspecies. Morph frequencies in a number of populations were related to current habitat conditions, and an extensive common-garden experiment involving both optimal and stressful conditions (drought and nutrient deficiency) was carried out. The putatively derived (dark) pollen morph of N. degenii ssp. barbro has a higher frequency on slopes facing north or east than on slopes facing south or west. Plants of the dark morph also have a higher mortality under drought stress or nutrient deficiency. Data available for N. degenii ssp. jenny provide little evidence for habitat-correlated variation in morph frequency or morph-specific differences in fitness under optimal and stressful growth conditions. Our results suggest that morph-by-environment interactions in mortality could contribute to the maintenance of pollen-colour dimorphisms in N. degenii ssp. barbro. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/147042
- author
- Jörgensen, Tove LU and Andersson, Stefan LU
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- in
- New Phytologist
- volume
- 168
- issue
- 2
- pages
- 487 - 498
- publisher
- Wiley-Blackwell
- external identifiers
-
- wos:000232441600024
- pmid:16219087
- scopus:32944477929
- ISSN
- 1469-8137
- DOI
- 10.1111/j.1469-8137.2005.01525.x
- language
- English
- LU publication?
- yes
- id
- 165682f5-9d44-463c-884f-744c51588d4e (old id 147042)
- date added to LUP
- 2016-04-01 12:21:52
- date last changed
- 2022-01-27 02:43:09
@article{165682f5-9d44-463c-884f-744c51588d4e,
abstract = {{Dimorphism in pollen colour is rare among flowering plants, but occurs in two geographically and morphologically distinct subspecies of Nigella degenii (Ranunculaceae). We evaluated the role of genotype-by-environment interactions in the maintenance of two pollen morphs within each of these subspecies. Morph frequencies in a number of populations were related to current habitat conditions, and an extensive common-garden experiment involving both optimal and stressful conditions (drought and nutrient deficiency) was carried out. The putatively derived (dark) pollen morph of N. degenii ssp. barbro has a higher frequency on slopes facing north or east than on slopes facing south or west. Plants of the dark morph also have a higher mortality under drought stress or nutrient deficiency. Data available for N. degenii ssp. jenny provide little evidence for habitat-correlated variation in morph frequency or morph-specific differences in fitness under optimal and stressful growth conditions. Our results suggest that morph-by-environment interactions in mortality could contribute to the maintenance of pollen-colour dimorphisms in N. degenii ssp. barbro.}},
author = {{Jörgensen, Tove and Andersson, Stefan}},
issn = {{1469-8137}},
language = {{eng}},
number = {{2}},
pages = {{487--498}},
publisher = {{Wiley-Blackwell}},
series = {{New Phytologist}},
title = {{Evolution and maintenance of pollen-colour dimorphisms in Nigella degenii: habitat-correlated variation and morph-by-environment interactions}},
url = {{http://dx.doi.org/10.1111/j.1469-8137.2005.01525.x}},
doi = {{10.1111/j.1469-8137.2005.01525.x}},
volume = {{168}},
year = {{2005}},
}