Morphological plasticity of the clonal herb <i>Lamiastrum galeobdolon</i> (L.) Ehrend. &amp; Polatschek in response to partial shading

Dong, Ming

doi:10.1111/j.1469-8137.1993.tb03819.x

Cited by 60 publications

(41 citation statements)

References 28 publications

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“…Clonal plants may respond to variation in environmental factors by plastic adjustment of their morphology (Slade & Hutchings 1987a, b;de Kroon & Knops 1990;Evans 1992;Caradus et al 1993;Dong 1993;Thompson 1993;Dong & de Kroon 1994;Hutchings & de Kroon 1994). Morphological plasticity in spacer (rhizome, stolon internode, Bell 1984) characters such as branching probability and length as well as in ramet characters such as leaf area and ramet height may be of ecological significance.…”

Section: Introductionmentioning

confidence: 99%

Morphological responses to nutrient availability in four clonal herbs

1996

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This paper examines morphological plasticity of clonal plants of contrasting habitats and of contrasting architectures in response to nutrient supply. The hypotheses were tested that plants from rich habitats possess greater plasticity in response to variation in resource supply than species from poor habitats, and that rhizomatous species are less plastic in their response than stoloniferous species. Two sympodial rhizomatous herbs (Carex flacca, C. hirta) and two monopodial stoloniferous herbs (Trifoliumfragiferum, T. repens) were subjected to four levels of nutrient supply in a garden experiment. One of the two species of each genus (C. hirta, T. repens) is from fertile and the other from infertile habitats. We measured 1) whole plant characters: total plant dry weight, number of modules (product of a single apical meristem) and number of ramets; 2) ramet characters: ramet leaf area and ramet height; and 3) spacer characters: branches per module, length per module and length per module internode.All measured characters in the Trifolium species significantly responded to treatment: the values for all measured characters increased with higher levels of fertilization. The differences in plant characters between fertilization levels were larger in Trifolium repens than in T. fragiferum in terms of whole plant characters, ramet characters and stolon internode length. The two Carex species did not differ in their responses to treatment in terms of most characters measured. In ramet characters and in some whole plant characters the species from fertile habitats were more plastic than those from infertile habitats. In spacer characters this pattern was not found. Foraging could not be demonstrated unequivocally.Morphological plasticity in the stoloniferous (Trifolium) species was much larger than in the rhizomatous (Carex) species. This seems in accordance with a foremost storage function of rhizomes, as against a foremost explorative function of stolons.

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Section: Introductionmentioning

confidence: 99%

Morphological responses to nutrient availability in four clonal herbs

1996

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“…Even if plants are always sampled from unshaded habitats, it is hard to control for the effects of self-shading. This could potentially have very large effects, because sun and shade leaves on the same plant might differ in SLA by a factor of two (Popma & Bongers, 1988 ;Cornelissen, 1992 ;Dong, 1993). Shipley & Meziane (1998) have shown that both mineral nutrition and irradiance can have complex and interactive effects on SLA.…”

Section: mentioning

confidence: 99%

Specific leaf area and leaf dry matter content as alternative predictors of plant strategies

1999

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A key element of most recently proposed plant strategy schemes is an axis of resource capture, usage and availability. In the search for a simple, robust plant trait (or traits) that will allow plants to be located on this axis, specific leaf area is one of the leading contenders. Using a large new unpublished database, we examine the variability of specific leaf area and other leaf traits, the relationships between them, and their ability to predict position on the resource use axis. Specific leaf area is found to suffer from a number of drawbacks ; it is both very variable between replicates and much influenced by leaf thickness. Leaf dry-matter content (sometimes referred to as tissue density) is much less variable, largely independent of leaf thickness and a better predictor of location on an axis of resource capture, usage and availability. However, it is not clear how useful dry matter content will be outside northwest Europe, and in particular in dry climates with many succulents.

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“…We attempted to provide light conditions to the target clover in a manner that was more natural than in previous studies (e.g. Solangaarachchi and Harper 1987;Thompson and Harper 1988;Ballare et al 1990Ballare et al , 1992Novoplansky et al 1990;Dong 1993;Ballare 1994;Leeflang 1999). This was done by exposing the white clover to light reflected from living grass neighbours, and to light filtered through grass neighbours, yet allowing the clover to receive large patches of unfiltered light.…”

Section: Introductionmentioning

confidence: 98%

“…Morphological adjustment to changing light conditions has been reported for some stoloniferous species such as Eichhornia crassipes (Méthy et al 1990), Veronica spp. (Dale and Causton 1992), Lamiastrum galeobdolon (Dong 1993;Leeflang 1999), Trifolium repens (Barthram 1997;Gautier et al 1998) and Potentilla spp. (Stuefer and Huber 1998).…”

Section: Introductionmentioning

confidence: 99%

Differential effects of light quality, provided by different grass neighbours, on the growth and morphology of Trifolium repens L. (white clover)

Marcuvitz

Turkington

2000

Oecologia

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The ability to respond in a specific manner to different light conditions imposed by different species of grass is a major factor contributing to white clover persistence in pastures. Gaps in a pasture provide light with a higher red:far-red ratio (R:FR) and higher photosynthetic photon flux density (PPFD) than the light filtered through neighbours. White clover (Trifolium repens L.) was grown under different light conditions in ways that tried to simulate as closely as possible some of the light conditions experienced in a natural field situation, being partially shaded and receiving light reflected from neighbouring grasses. The objective was to determine specifically if the mere presence of neighbouring grasses could influence the growth and morphology of white clover individuals without physically contacting them, and thereby send a signal of impending competition. In the first experiment, white clover was subjected to shading cast from three different grass species. There were differences in both the quantity and quality of light received under the various grass canopies. The canopies reduced overall growth and branching of clones, while increasing the length of and biomass allocation to petioles. Lolium perenne L. canopy shade had different effects compared to Holcus lanatus L. or Dactylis glomerata L., but between the latter two species, no differences were detected. In the second experiment, light reflected from grass neighbours was provided simultaneously with direct light. There was a strong increase in FR and a resulting decrease in the R:FR due to neighbouring D. glomerata, but few consistent effects on white clover growth and morphology; there was evidence of phototropic movement by the leaves. We show that plants must experience partial shading, and not just reflected light, in order to alter their morphology in response to the presence of different species of grass neighbours.

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Morphological plasticity of the clonal herb Lamiastrum galeobdolon (L.) Ehrend. & Polatschek in response to partial shading

Cited by 60 publications

References 28 publications

Morphological responses to nutrient availability in four clonal herbs

Morphological responses to nutrient availability in four clonal herbs

Specific leaf area and leaf dry matter content as alternative predictors of plant strategies

Differential effects of light quality, provided by different grass neighbours, on the growth and morphology of Trifolium repens L. (white clover)

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