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| Allometric response of perennial Pennisetum centrasiaticum Tzvel to nutrient and water limitation in the Horqin Sand Land of China |
| Wei MAO1, TongHui ZHANG1, YuLin LI1, XueYong ZHAO1, YingXin HUANG2 |
1 Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
2 Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China |
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Abstract Optimal partitioning theory (OPT) suggests that plants should allocate relatively more biomass to the organs that acquire the most limited resources. The assumption of this theory is that plants trade off the biomass allocation between leaves, stems and roots. However, variations in biomass allocation among plant parts can also occur as a plant grows in size. As an alternative approach, allometric biomass partitioning theory (APT) asserts that plants should trade off their biomass between roots, stems and leaves. This approach can minimize bias when comparing biomass allocation patterns by accounting for plant size in the analysis. We analyzed the biomass allocation strategy of perennial Pennisetum centrasiaticum Tzvel in the Horqin Sand Land of northern China by treating samples with different availabilities of soil nutrients and water, adding snow in winter and water in summer. We hypothesized that P. centrasiaticum alters its pattern of biomass allocation strategy in response to different levels of soil water content and soil nitrogen content. We used standardized major axis (SMA) to analyze the allometric relationship (slope) and intercept between biomass traits (root, stem, leaf and total biomass) of nitrogen/water treatments. Taking plant size into consideration, no allometric relationships between different organs were significantly affected by differing soil water and soil nitrogen levels, while the biomass allocation strategy of P. centrasiaticum was affected by soil water levels, but not by soil nitrogen levels. The plasticity of roots, leaves and root/shoot ratios was ‘true’ in response to fluctuations in soil water content, but the plasticity of stems was consistent for trade-offs between the effects of water and plant size. Plants allocated relatively more biomass to roots and less to leaves when snow was added in winter. A similar trend was observed when water was added in summer. The plasticity of roots, stems and leaves was a function of plant size, and remained unchanged in response to different soil nitrogen levels.
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Received: 24 October 2011
Published: 06 June 2012
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| Fund: The National Basic Research Program of China (2009CB421303), the National Science & Technology Pillar Program (2011BAC07B02), and the National Natural Science Foundation of China (40871004). |
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| Bloom A J, Chapin F S, Mooney H A. 1985. Resource limitation in plants—an economic analogy. Annual Review of Ecology and Systematics, 16(1): 363–392.Bonser S P, Aarssen L W. 2009. Interpreting reproductive allometry: individual strategies of allocation explain size-dependent reproduction in plant populations. Perspectives in Plant Ecology. Evolution and Systematics, 11(1): 31–40.Chen S P, Gao Y B, Ren A Z, et al. 2002. Ecological adaptability of Pennisetum centrasiaticum clones on farmlands and dune ecotone of Keerqin Sandy Land. Chinese Journal of Ecology, 13(1): 45–49.Coleman J S, McConnaughty K D M. 1995. A non-functional interpretation of a classical optimal-partitoning example. Functional Ecology, 9(6): 951–954.Esmaeili M M, Bonis A, Bouzillé J B, et al. 2009. Consequence of ramet defoliation on plant clonal propagation and biomass allocation: example of five rhizomatous grassland species. Flora-Morphology, Distribution, Functional Ecology of Plants, 204(1): 25–33.Gao Y Z, Chen Q, Lin S, et al. 2011. Resource manipulation effects on net primary production, biomass allocation and rain-use efficiency of two semiarid grassland sites in Inner Mongolia, China. Oecologia, 165(4): 855–864.Guo J L, Li Q F. 2008. Effects of clonal integration on clonal growth in Pennisetum centrasiaticum. Chinese Journal of Grassland, 30(6): 43–48.Hermans C, Hammond J P, White P J, et al. 2006. How do plants respond to nutrient shortage by biomass allocation? Trends in Plant Science, 11(12): 610–617.Huang Y X, Zhao X Y, Zhang H X, et al. 2009a. A comparison of phenotypic plasticity between two species occupying different positions in a successional sequence. Ecological Research, 24(6): 1335–1344.Huang Y X, Zhao X Y, Zhang H X, et al. 2009b. Allometric effects of Agriophyllum squarrosum in response to soil nutrients, water, and population density in the Horqin Sandy Land of China. Journal of Plant Biology, 52(3): 210–219.Johnston F, Johnston S. 2004. Impacts of road disturbance on soil properties and on exotic plant occurrence in subalpine areas of the Australian Alps. Arctic, Antarctic, and Alpine Research, 36(2): 201–207.Kobe R K, Iyer M, Walters M B. 2010. Optimal partitioning theory revisited: nonstructural carbohydrates dominate root mass responses to nitrogen. Ecology, 91(1): 166–179.Li F R, Kang L F, Zhang H, et al. 2005. Changes in intensity of wind erosion at different stages of degradation development in grasslands of Inner Mongolia, China. Journal of Arid Environments, 62(4): 567–585.Linkohr B I, Williamson L C, Fitter A H, et al. 2002. Nitrate and phosphate availability and distribution have different effects on root system architecture of Arabidopsis. The Plant Journal, 29(6): 751–760.Liu S, Gao Y B, Chen S P, et al. 1999. A preliminary study on the clonal growth and adaptive strategy of Pennisetum centrasiaticum and Leymus secalinus. Journal of Desert Research, 19(Suppl.1): 75–78.McCarthy M C, Enquist B J. 2007. Consistency between an allometric approach and optimal partitioning theory in global patterns of plant biomass allocation. Functional Ecology, 21(4): 713–720.McConnaughay K D M, Coleman J S. 1999. Biomass allocation in plants: ontogeny or optimality? A test along three resource gradients. Ecology, 80(8): 2581–2593.Mony C, Koschnick T J, Haller W T, et al. 2007. Competition between two invasive Hydrocharitaceae (Hydrilla verticillata (L.f.) (Royle) and Egeria densa (Planch)) as influenced by sediment fertility and season. Aquatic Botany, 86(3): 236–242.Müller I, Schmid B, Weiner J. 2000. The effect of nutrient availability on biomass allocation patterns in 27 species of herbaceous plants. Perspectives in Plant Ecology, Evolution and Systematics, 3(2): 115–127.Peichl M, Arain M A. 2007. Allometry and partitioning of above- and belowground tree biomass in an age-sequence of white pine forests. Forest Ecology and Management, 253(1–3): 68–80.Pino J, Sans F X, Masalles R M. 2002. Size-dependent reproductive pattern and short-term reproductive cost in Rumex obtusifolius L. Acta Oecologica, 23(5): 321–328.Poorter H, Nagel O. 2000. The role of biomass allocation in the growth response of plants to different levels of light, CO2, nutrients and water: a quantitative review. Australian Journal of Plant Physiology, 27(12): 595–607.R Development Core Team. 2009. R: A Language and Environment for Statistical Computing. Vienna, Austria: R Foundation for Statistical Computing. Ren A Z, Gao Y B, Wang J L. 2000. Morphological plasticity of Pennisetum centrasiaticum clones in abandoned farmland in ecotone of farming and animal husbandry. Journal of Desert Research, 20(Suppl.1): 33–37.Shipley B, Meziane D. 2002. The balanced-growth hypothesis and the allometry of leaf and root biomass allocation. Functional Ecology, 16(3): 326–331.Solow A R. 2005. Power laws without complexity. Ecology Letters, 8(4): 361–363.Su Y Z, Zhao H L, Li Y L, et al. 2004. Influencing mechanisms of several shrubs on soil chemical properties in semiarid Horqin Sandy Land, China. Arid Land Research and Management, 18(3): 251–263.Wang J, Yu D, Wang Q. 2008. Growth, biomass allocation, and autofragmentation responses to root and shoot competition in Myriophyllum spicatum as a function of sediment nutrient supply. Aquatic Botany, 89(4): 357–364.Warton D I, Wright I J, Falster D S, et al. 2006. Bivariate line-fitting methods for allometry. Biological Reviews, 81(2): 259–291.Weiner J. 2004. Allocation, plasticity and allometry in plants. Perspectives in Plant Ecology, Evolution and Systematics, 6(4): 207–215.Wipf S. 2010. Phenology, growth, and fecundity of eight subarctic tundra species in response to snowmelt manipulations. Plant Ecology, 207(1): 53–66.Wright I J, Westoby M, Reich P B. 2002. Convergence towards higher leaf mass per area in dry and nutrient-poor habitats has different consequences for leaf life span. Journal of Ecology, 90(3): 534–543.Wright I J, Reich P B, Westoby M, et al. 2004. The worldwide leaf economics spectrum. Nature, 428(6985): 821–827.Yang Y H, Luo Y Q. 2011. Isometric biomass partitioning pattern in forest ecosystems: evidence from temporal observations during stand development. Journal of Ecology, 99(2): 431–437.Zhang D Y, Jiang X H. 2002. Size-dependent resource allocation and sex allocation in herbaceous perennial plants. Journal of Evolutionary Biology, 15(1): 74–83.Zhang J X, Zhao H L, Zhang T H, et al. 2005. Community succession along a chronosequence of vegetation restoration on sand dunes in Horqin Sandy Land. Journal of Arid Environments, 62(4): 555–566.Zhao H L, Zhao X Y, Zhang T H, et al. 2004. Plant Strategies and Vegetation Stability in Desertification Process. Beijing: China Ocean Press.Zhao H L, Zhou R L, Su Y Z, et al. 2007. Processes and mechanisms of soil desertification in semiarid areas, Northern China. Journal of Soil and Water Conservation, 21(3): 1–5. |
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