Mass–density relationship changes along salinity gradient in Suaeda salsa L.

• Autorzy: Zhang H. , Wang G. , Zheng K. , Zhang W.
• Języki publikacji: EN

Abstrakty

EN

Whether and why the biomass–density (M–N) scaling relationship varies along environmental gradients were continuously debated in theoretical ecology. In this study, how soil salinity stress affects on the M–N scaling relationship was investigated by using Suaeda salsa L. in beach of Dongtai, Jiangsu Province, China. The results showed that the exponent of the scaling relationship (b) of low salinity level (-1.259) was smaller than that of middle salinity level (-1.025), which in turn was smaller than that high salinity level (-0.698). The plant height–crown radius (H–r) scaling exponents (ϭ) decreased with increasing salinity stress, while the canopy coverage–density (C–N) scaling exponents (β) showed an inverse trend. The predict data (b) based on ϭ and β by using the geometric model were statistically indistinguishable from their observed values for the three salinity levels. Moreover, two resources utilization parameters (l mean from root to leaf, a total area of leaves) of metabolic theory, photosynthetic rate, and water-use efficiency were more advantageous to Suaeda salsa L. of high stress than to those of low salinity. Therefore, it was implied that the changes of M–N relationship along salinity gradients may be resulted from their different geometric morphologies and resource utilization in response to salinity stress.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2010
• Tom: 32
• Numer: 6
• Opis fizyczny: p.1031-1037,fig.,ref.

Twórcy

autor

Zhang H.

• Institute of Digital Agricultural Research, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China

autor

Wang G.

• Institute of Digital Agricultural Research, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China

autor

Zheng K.

• Institute of Agricultural Ecological Research, College of Life Sciences, Zhejiang University, Hangzhou 310058, China

autor

Zhang W.

• Institute of Agricultural Ecological Research, College of Life Sciences, Zhejiang University, Hangzhou 310058, China

Bibliografia

• Brian JE, Evan PE, Travis EH, Huxman TE, Allen AP, Ignace DD, Gillooly JF (2003) Scaling metabolism from organisms to ecosystems. Nature 423:639–642
• Dai XF, Jia X, Zhang WP, Bai YY, Zhang JY, Wang Y, Wang GX (2009) Plant height–crown radius and canopy coverage–density relationships determine above-ground biomass–density relationship in stressful environments. Biol Lett 5:571–573
• Deng JM, Wang GX, Morris EC, Wei XP, Li DX, Chen BM, Zhao CM, Liu J, Wang Y (2006) Plant mass–density relationship along a moisture gradient in north-west China. J Ecol 94:953–958
• Dewar RC (1993) Mechanistic analysis of self-thinning in term of the carbon balance of trees. Ann Bot 71:147–159
• Equist BJ, Brown JH, West GB (1998) Allometric scaling of plant energetics and population. Nature 395:163–165
• Glenn EP, Brown JJ (1998) Effects of soil salt levels on the growth and water use efficiency of Atriplex canescens (Chenopodiaceae) varieties in drying soil. Am J Bot 85:10–16
• Hacker SD, Bertness MD (1995) Morphological and physiological consequences of a positive plant interaction. Ecology 76:2165–2175
• Harper JL (1977) Population biology of plants. Academic Press, London, pp 25–31
• King DA (1990) The adaptive significance of tree height. Am Nat 135:809–828
• Kozlowski J, Konarzewski M (2004) Is West, Brown and Enquist’s model of allometric scaling mathematically correct and biologically relevant? Funct Ecol 18:283–289
• Lonsdale WM, Watkinson AR (1982) Light and self-thinning. New Phytol 90:431–445
• Morris EC (1999) Density-dependent mortality induced by low nutrient status of the substrate. Ann Bot 84:95–107
• Morris EC (2003) How does fertility of the substrate affect intraspecific competition? Evidence and synthesis from self-thinning. Ecol Res 18:287–305
• Pearey RW, Ustin SL (1984) Effects of salinity on growth and photosynthesis of three California tidal marsh species. Oecologia 62:68–73
• Ross DJ (1992) Influence of sieve mesh size on estimates of microbial carbon and nitrogen by fumigation–extraction procedures in soils under pasture. Soil Biol Biochem 24:343–350
• Stelling J, Klamt S, Bettenbrock K, Schuster S, Gilles ED (2002) Metabolic network structure determines key aspects of functionality and regulation. Nature 420:190–193
• Tilman D, Kareiva P (1997) Spatial ecology: the role of space in population dynamics and interspecific interactions. Princeton University Press, New Jersey, pp 10–25
• West GB, Brown JH, Enquist BJ (1999a) A general model for the structure and allometry of plant vascular systems. Nature 400:664–667
• West GB, Brown JH, Enquist BJ (1999b) The fourth dimension of life:fractal geometry and allometric scaling of organism. Science 284:1677–1679
• Westoby M (1984) The self-thinning rule. Adv Ecol Res 14:167–225
• White J (1980) Demographic factors in population of plants. In: Solbrig OT (ed) Demographic and evolution in plant populations. University of California Press, Berkeley, pp 21–48
• White J (1981) The allometric interpretation of self-thinning rule. J Theor Biol 89:475–500
• White J (1985) The thinning rule and its application to mixtures of plant population. In: White J (ed) Studies on plant demography. Academic Press, London, pp 291–309
• White J, Harper JL (1970) Correlated changes in plant size and number in plant population. J Ecol 58:467–485
• Yoda K, Kira T, Ogawa H, Hozumi K (1963) Intraspecific competition among higher plants. XI. Self-thinning in overcrowded pure stands under cultivated and natural conditions. J Biol Osaka City Univ 14:107–129
• Zhang H, Wang GX, Liu ZQ, Shen ZX, Zhao XZ (2005) Sensitivity of response to abscisic acid affects the power of self-thinning in Arabidopsis thaliana. Bot Bull Acad Sin 46:347–353
• Zhang H, Wang GX, Shen ZX, Zhao XZ, Qiu MQ (2006) Effect of sensitivity to abscisic acid on scaling relationships for biomass production rates and body size in Arabidopsis thaliana. Acta Physiol Plant 28:373–379
• Zhang H, Li JN, Wang GX, Dai XF, Qiu MQ, Zheng KF (2008) Plants interactions between Suaeda salsa individuals are mediated by salinity stress. Acta Physiol Plant 30:99–104