On the Importance of Information-Acquiring Systems in Plant-Plant Interactions

Aphalo, Pedro J.; Ballaré, Carlos L.

doi:10.2307/2390084

Cited by 182 publications

(150 citation statements)

References 57 publications

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“…Plants actually have information-acquiring systems that can detect and 'sense' the presence of neighbours by using phytochrome (Smith, 1982(Smith, , 1994Schmitt and Wulff, 1993;Aphalo and Ballare, 1995). When population density increases, mutual shading inevitably occurs, which leads to reduced light quantity and red/far-red ratio (an indicator of light quality).…”

Section: Discussionmentioning

confidence: 99%

The effect of population density on shoot morphology of herbs in relation to light capture by leaves

Sekimura

Koebernick

Лі

et al. 2000

Ecological Modelling

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Plants change their shapes, depending on their environment, for example, plant height increases with increasing population density. We examined the density-dependent plasticity in shoot morphology of herbs by analysing a mathematical model which identifies a number of key factors that influence shoot morphology, namely (i) solar radiation captured by leaves; (ii) shading from neighbouring plants; and (iii) utilisation efficiency of resource by leaves, stems and veins. An optimisation theory was used to obtain optimal shoot morphology in relation to maximal light capture by leaves, under trade-offs of resource partition among organs. We first evaluated the solar radiation flux per unit leaf area per day for different shoot forms. Our model predicts that the optimal internodal length of the stem that brings about the maximal light capture by leaves increases with plant population density, and this is consistent with experimental data. Moreover, our simple model can also be extended to explain the morphological plasticity in other herbs (i.e. stemless plants) that are different from our model plants with a stem. These findings illustrate how optimisation theory can be used for the analysis of plasticity in shoot morphology of plants in response to environmental changes, as well as the analysis of diversity in morphology.

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Section: Discussionmentioning

confidence: 99%

The effect of population density on shoot morphology of herbs in relation to light capture by leaves

Sekimura

Koebernick

Лі

et al. 2000

Ecological Modelling

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“…The induced responses enable plants to reduce the negative fitness consequences caused by competition for light (Aphalo & Ballare, 1995;de Kroon & Hutchings, 1995;Sultan, 1995;Huber & Hutchings, 1997;van Hinsberg, 1997;Geber & Griffen, 2003). However, plastic responses may also be costly (van Tienderen, 1991;DeWitt et al ., 1998;Scheiner & Berrigan, 1998;Scheiner, 2002).…”

Section: Introductionmentioning

confidence: 99%

Shade avoidance inTrifolium repens: costs and benefits of plasticity in petiole length and leaf size

et al. 2006

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Research Summary• We tested whether the degree of shade-induced plasticity in petiole length and leaf area is related to the mean trait value expressed under high-light conditions, and to what extent trait values expressed under high-light and shaded conditions affect plant performance.• Thirty-four Trifolium repens genotypes were used with a wide range of petiole lengths and leaf areas. Plants were subjected to a high-light environment and two shading regimes: homogeneous shading and a vertical light gradient.• Absolute petiole elongation in response to both shading treatments and absolute leaf area expansion in response to homogeneous shading were independent of the trait values expressed in high light. Consequently, relative plasticity was higher for genotypes with lower high-light trait values. Plasticity was associated with enhanced plant performance in a vertical light gradient but not in homogeneously shaded conditions. We also found costs associated with the ability to express plasticity.• Our results suggest that selection can act separately on trait values expressed under high-light conditions and on the degree of plasticity.

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“…O primeiro está relacionado com a abundância e a disponibilidade de luz e o segundo funciona como fonte de informação e balizador das respostas e crescimento das plantas em um dado ambiente. Dessa forma, a luz, além de representar a fonte primária de energia para as plantas, funciona também como fonte de informação sobre a existência ou potencial presença de competidores ao redor dos indivíduos que compõem a comunidade de plantas (APHALO; BALLARÉ, 1995 O fato caracteriza uma condição de equilíbrio dinâmico estável ("steady state") que está associada a um determinado ritmo morfogênico resultante da intensidade de desfolhação sendo empregada e que opera no sentido de manter o IAF dos pastos relativamente estável . Esse equilíbrio ocorre dentro de uma amplitude de intensidades de pastejo delimitada pelas condições de super e sub-pastejo (HODGSON, 1990;, e define os limites de resistência das plantas ao pastejo (BRISKE, 1996) Para o cálculo do filocrono em graus-dia, foi adotado um valor de 15°C como temperatura basal.…”

Section: Introductionunclassified

Características morfogênicas e estruturais de amendoim forrageiro (Arachis pintoi krapovickas & Gregory cv. Belmonte) submetido a intensidades de pastejo sob lotação contínua

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On the Importance of Information-Acquiring Systems in Plant-Plant Interactions

Cited by 182 publications

References 57 publications

The effect of population density on shoot morphology of herbs in relation to light capture by leaves

The effect of population density on shoot morphology of herbs in relation to light capture by leaves

Shade avoidance inTrifolium repens: costs and benefits of plasticity in petiole length and leaf size

Características morfogênicas e estruturais de amendoim forrageiro (Arachis pintoi krapovickas & Gregory cv. Belmonte) submetido a intensidades de pastejo sob lotação contínua

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