TY - JOUR
T1 - Morphological variation in Plantago lanceolata L.: effects of light quality and growth regulators on sun and shade populations
AU - Van Hinsberg, A.
N1 - Reporting year: 1997
Metis note: 2356; CTE; PVP; file:///L:/Endnotedatabases/NIOOPUB/pdfs/Pdfs1997/VanHinsberg_2356.pdf
PY - 1997
Y1 - 1997
N2 - The effects of different ratios of red io far-red light (R/FR- ratio) and of exogenously applied growth regulators on the morphology of plants from sun and shade populations were studied. Large differences in growth form were found between populations adapted to either sun or shaded habitats. Low R/FR- ratios, simulating vegetation shade, induced a growth form similar to that of plants from the shade population. High R/FR- ratios, simulating sunlight, had the opposite effect. Most morphological differences between shade and sun populations and effects of low R/FR-ratios on growth form could be mimicked by exogenously applied gibberellin (GA(3)). In contrast, application of a gibberellin inhibitor (CCC) induced a growth form similar to that of the sun population and of plants grown under a high R/FR-ratio. Interactions between genetic background, the R/FR-ratio, and hormone treatment, were small and the factors exerted their action independently. The results are discussed in relation to the influence of developmental constraints on the evolvability of optimal phenotypes and the plastic responses therein. [KEYWORDS: morphological variation; phenotypic plasticity; red to far-red ratio; gibberellins; Plantago lanceolata 3 contrasting habitats; phenotypic plasticity; gibberellic-acid; genetic differentiation; phytochrome; germination;environment; expression; evolution]
AB - The effects of different ratios of red io far-red light (R/FR- ratio) and of exogenously applied growth regulators on the morphology of plants from sun and shade populations were studied. Large differences in growth form were found between populations adapted to either sun or shaded habitats. Low R/FR- ratios, simulating vegetation shade, induced a growth form similar to that of plants from the shade population. High R/FR- ratios, simulating sunlight, had the opposite effect. Most morphological differences between shade and sun populations and effects of low R/FR-ratios on growth form could be mimicked by exogenously applied gibberellin (GA(3)). In contrast, application of a gibberellin inhibitor (CCC) induced a growth form similar to that of the sun population and of plants grown under a high R/FR-ratio. Interactions between genetic background, the R/FR-ratio, and hormone treatment, were small and the factors exerted their action independently. The results are discussed in relation to the influence of developmental constraints on the evolvability of optimal phenotypes and the plastic responses therein. [KEYWORDS: morphological variation; phenotypic plasticity; red to far-red ratio; gibberellins; Plantago lanceolata 3 contrasting habitats; phenotypic plasticity; gibberellic-acid; genetic differentiation; phytochrome; germination;environment; expression; evolution]
U2 - 10.1046/j.1420-9101.1997.10050687.x
DO - 10.1046/j.1420-9101.1997.10050687.x
M3 - Article
VL - 10
SP - 687
EP - 701
JO - Journal of Evolutionary Biology
JF - Journal of Evolutionary Biology
SN - 1010-061X
IS - 5
ER -