Shipley2002b

Référence

Shipley, B. (2002) Trade-offs between net assimilation rate and specific leaf area in determining relative growth rate: Relationship with daily irradiance. Functional Ecology, 16(5):682-689.

Résumé

1. Three separate experiments were conducted, involving 27 herbaceous species and 14 woody species aged 15-30 days, in order to determine the relative importance of net assimilation rate (NAR), specific leaf area (SLA) and leaf weight ratio (LWR) in explaining interspecific variations in relative growth rate. 2. Daily quantum inputs were 31·12 mol m-2 day-1 in the first experiment and 33·17 mol m-2 day-1 in the second and third experiments. This is about twice the typical irradiance of most other experiments in this area, but only about 85% of the daily photon flux in nature. Plants were cultivated in hydroponic sand culture in a solution containing 5·8 mM nitrogen. 3. RGR was strongly and positively correlated with NAR in all three experiments. RGR was weakly and negatively correlated with SLA, while the correlation between RGR and LWR was weak and variable. 4. These results are compared to those already published in the literature: the commonly reported result that interspecific variation in RGR is determined primarily by SLA is partly due to the low irradiance used in most experiments, and the relative importance of SLA and NAR changes depending on irradiance. 5. A hypothesis is proposed in which direct and indirect effects of SLA on each of NAR and RGR are decomposed, and which leads to a trade-off between SLA and NAR as a function of daily irradiance.

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@ARTICLE { Shipley2002b,
    AUTHOR = { Shipley, B. },
    TITLE = { Trade-offs between net assimilation rate and specific leaf area in determining relative growth rate: Relationship with daily irradiance },
    JOURNAL = { Functional Ecology },
    YEAR = { 2002 },
    VOLUME = { 16 },
    PAGES = { 682-689 },
    NUMBER = { 5 },
    NOTE = { 02698463 (ISSN) Cited By (since 1996): 34 Export Date: 26 April 2007 Source: Scopus CODEN: FECOE doi: 10.1046/j.1365-2435.2002.00672.x Language of Original Document: English Correspondence Address: Shipley, B.; De?partement de biologie; Universite? de Sherbrooke Sherbrooke (Que?bec), JIK 2 RI, Canada; email: bill.shipley@usherbrooke.ca References: Antunez, I., Retamosa, E.C., Villar, R., Relative growth rate in phylogenetically related deciduous and evergreen woody species (2001) Oecologia, 128, pp. 172-180; Bryk, A.S., Raudenbush, S.W., (1992) Hierarchical Linear Models, , Sage, Newbury Park, UK; Campbell, D.R., Rochefort, L., Germination and seedling growth of bog plants in relation to the recolonization of milled peatlands (2002) Journal of Vegetation Science, , in press; Gleason, H.A., Cronquist, A., (1991) Manual of Vascular Plants of Northeastern United States and Adjacent Canada, , New York Botanical Garden, New York; Goldstein, H., (1995) Multilevel Statistical Models, , Academic Press, London; Grime, J.P., (2001) Plant Strategies, Vegetation Processes, and Ecosystem Properties, , John Wiley \& Sons, New York; Grime, J.P., Hunt, R., Relative growth rate: Its range and adaptive significance in a local flora (1975) Journal of Ecology, 63, pp. 393-422; Huante, P., Rincon, E., Responses to light changes in tropical deciduous woody seedlings with constrasting growth rates (1998) Oecologia, 113, pp. 53-66; Huante, P., Rincon, E., Acosta, I., Nutrient availability and growth rate of 34 species from a tropical deciduous forest in Mexico (1995) Functional Ecology, 9, pp. 849-858; Hunt, R., Relative growth rates of cohorts of ramets cloned from a single genet (1984) Journal of Ecology, 72, pp. 299-305; Hunt, R., (1990) Basic Growth Analysis, , Unwin-Hyman, London; Hunt, R., Cornelissen, J.H.C., Components of relative growth rate and their interrelationships in 59 temperate plant species (1997) New Phytologist, 135, pp. 395-417; Krijnen, H.J., (1992) Normale en Extreme Waarden Van de 15 Hoofdstations Voor Het Tijdvak 1961-90, , KNMI, De Bilt, the Netherlands; Lambers, H., Chapin, F.S., Pons, T.L., (1998) Plant Physiological Ecology, , Springer, New York; McKenna, M.F., Shipley, B., Interacting determinants of interspecific relative growth: Empirical patterns and a theoretical explanation (1999) Ecoscience, 6, pp. 286-296; Meziane, D., (1998) E?tude de la Variation Interspe?cifique de la Vitesse Spe?cifique de Croissance et Mode?lisation de L'effet des Attributs Morphologiques, Physiologiques et D'allocation de Biomasse, , PhD thesis, Universite? de Sherbrooke, Sherbrooke, Quebec; Meziane, D., Shipley, B., Interacting components of interspecific relative growth rate: Constancy and change under differing conditions of light and nutrient supply (1999) Functional Ecology, 13, pp. 611-622; Meziane, D., Shipley, B., Direct and indirect relationships between specific leaf area, leaf nitrogen and leaf gas exchange. Effects of irradiance and nutrient supply] (2001) Annals of Botany, 88, pp. 915-927; Pinheiro, J.C., Bates, D.M., (2000) Mixed-Effects Models in S and S-plus, , Springer, New York; Poorter, H., Interspecific variation in relative growth rate: On ecological causes and physiological consequences (1989) Causes and Consequences of Variation in Growth Rate and Productivity of Higher Plants, pp. 45-68. , (H. Lambers, M.L. Cambridge, H. Konings \& T.L. Pons, eds). SPB Academic Publishing, The Hague, the Netherlands; Poorter, L., Growth responses of 15 rainforest tree species to a light gradient: The relative importance of morphological and physiological traits (1999) Functional Ecology, 13, pp. 396-410; Poorter, H., Van der Werf, A., Is inherent variation in RGR determined by LAR at low irradiance and by NAR at high irradiance? A review of herbaceous species (1998) Inherent Variation in Plant Growth, pp. 309-336. , (H. Lambers, H. Poorter \& M.I. Van Vuuren, eds). Backhuys, Leiden, the Netherlands; Reich, P.B., Ellsworth, D.S., Walters, M.B., Generality of leaf trait relationships: A test across six biomes (1999) Ecology, 80, pp. 1955-1969; Van Rijn, C., (2001) A Physiological and Genetic Analysis of Growth Characteristics in Hordeum spontaneum, , PhD thesis, Utrecht University, Utrecht, the Netherlands; Ryser, P., Wahl, S., Interspecific variation in RGR and the underlying traits among 24 grass species grown in full daylight (2001) Plant Biology, 3, pp. 426-436; Saverimuttu, T., Westoby, M., Components of variation in seedling potential relative growth rate: Phylogenetically independent contrasts (1996) Oecologia, 105, pp. 281-285; Shipley, B., Structured interspecific determinants of specific leaf area in 34 species of herbaceous angiosperms (1995) Functional Ecology, 9, pp. 312-319; Shipley, B., (2000) Cause and Correlation in Biology: A User's Guide to Path Analysis, Structural Equations, and Causal Inference, , Oxford University Press, Oxford; Taub, D.R., Analysis of interspecific variation in plant growth responses to nitrogen (2002) Canadian Journal of Botany, 80, pp. 34-41; Tilman, D., (1988) Plant Strategies and the Dynamics and Structure of Plant Communities, , Princeton University Press, Princeton, NJ; Tjoelker, M.G., Oleksyn, J., Reich, P.B., Temperature and ontogeny mediate growth response to elevated CO2 in seedlings of five boreal tree species (1998) New Phytologist, 140, pp. 197-210; Volin, J.C., Reich, P.B., Givnish, T.J., Elevated carbon dioxide ameliorates the effects of ozone on photosynthesis and growth: Species respond similarly regardless of photosynthetic pathway or plant functional group (1998) New Phytologist, 138, pp. 315-325; Watling, J.R., Ball, M.C., Woodrow, I.E., The utilization of lightflecks for growth in four Austalian rainforest species (1997) Functional Ecology, 11, pp. 231-239; Westoby, M., A leaf-height-seed (LHS) plant ecology strategy scheme (1998) Plant and Soil, 199 (2), pp. 213-227; Witkowski, E.T.F., Lamont, B.B., Leaf specific mass confounds leaf density and thickness (1991) Oecologia, 88, pp. 486-493; Wright, I.J., Westoby, M., Cross-species relationships between seedling relative growth rate, nitrogen productivity and root vs leaf function in 28 Australian woody species (2000) Functional Ecology, 14, pp. 97-107. },
    ABSTRACT = { 1. Three separate experiments were conducted, involving 27 herbaceous species and 14 woody species aged 15-30 days, in order to determine the relative importance of net assimilation rate (NAR), specific leaf area (SLA) and leaf weight ratio (LWR) in explaining interspecific variations in relative growth rate. 2. Daily quantum inputs were 31·12 mol m-2 day-1 in the first experiment and 33·17 mol m-2 day-1 in the second and third experiments. This is about twice the typical irradiance of most other experiments in this area, but only about 85% of the daily photon flux in nature. Plants were cultivated in hydroponic sand culture in a solution containing 5·8 mM nitrogen. 3. RGR was strongly and positively correlated with NAR in all three experiments. RGR was weakly and negatively correlated with SLA, while the correlation between RGR and LWR was weak and variable. 4. These results are compared to those already published in the literature: the commonly reported result that interspecific variation in RGR is determined primarily by SLA is partly due to the low irradiance used in most experiments, and the relative importance of SLA and NAR changes depending on irradiance. 5. A hypothesis is proposed in which direct and indirect effects of SLA on each of NAR and RGR are decomposed, and which leads to a trade-off between SLA and NAR as a function of daily irradiance. },
    KEYWORDS = { Irradiance Leaf weight ratio Light LWR NAR Path analysis RGR SLA assimilation efficiency growth rate interspecific variation irradiance leaf area trade-off },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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