Abstract
The development and use of transgenic plants has steadily increased, but there are still little data about the responses of soil microorganisms to these genetic modifications. We utilized a greenhouse trial approach to evaluate the effects of altered stem lignin in trembling aspen (Populus tremuloides) on soil microbial communities in three soils which differed in their chemical and physical properties; they included a sandy loam (CO-Colorado), a silt loam (KS-Kansas), and a clay loam (TX-Texas). Three transgenic aspen lines were developed from a natural clone common to the Great Lakes region of North America. The concentrations of stem lignin concentrations were reduced by 35% (Line 23), 40% (Line 141) and 50% (Line 72). Line 72 and Line 141 also had a 40 and 20% increase in syringyl-type stem lignin, respectively. Indirectly, these modifications resulted in increased (5–13%) and decreased (−5 to −57%) levels of root production across the lines and soil types. Responses of the soil microbial communities were investigated using: phospholipid fatty acids (PLFA), neutral lipid fatty acids (NLFA), and 3) extracellular enzyme assays. PLFA analyses indicated that there were large differences in microbial community composition between the three soils. Similarly, there were large differences in total NLFA between soils, with the KS soils having the highest amount and CO the lowest. Enzyme activities did not differ between soils, except for cellubiohydrolase, which was highest in CO soil. Across all three soils, responses to the four genetic lines were not consistent. Interactions between soil type and genetic line make it difficult to assess the potential ecological impacts of transgenic aspen on soil microbial communities and their associated functions. Given these interactions, field trials with transgenic aspen should encompass the wide range of soils targeted for commercial planting in order to determine their effect(s) on the resident soil microbial community.
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References
Amthor JS (2003) Efficiency of lignin biosynthesis: a quantitative analysis. Ann Bot 9:673–695
Anderson LJ, Maherali H, Johnson HB, Polley HW, Jackson RB (2001) Gas exchange and photosynthetic acclimation over subambient to elevated CO2 in a C3-C4 grassland. Glob Change Biol 7:693–707
Bååth E (2003) The use of neutral lipid fatty acids to indicate the physiological conditions of soil fungi. Microbial Ecol 45:373–383
Balser TC, Treseder KK, Ekenler M (2005) Using lipid analysis and hyphal length to quantify AM and saprotrophic fungal abundance along a soil chronosequence. Soil Biol Biochem 37:601–604
Bardgett RD, Lovell RD, Hobbs PJ, Jarvis SC (1999a) Seasonal changes in soil microbial communities along a fertility gradient of temperate grasslands. Soil Biol Biochem 31:1021–1030
Bardgett RD, Mawdsley JL, Edwards S, Hobbs PJ, Rodwell JS, Davies WJ (1999b) Plant species and nitrogen effects on soil biological properties of temperate upland grasslands. Funct Ecol 13:650–660
Barnes BV, Wagner WH (2004) Michigan trees. University of Michigan Press, Ann Arbor, MI. 447 p
Belnap J, Phillips SL (2001) Soil biota in an ungrazed grassland: response to annual grass (Bromus tectorum) invasion. Ecol Appl 11:1261–1275
Blair JM, Parmelee RW, Beare MH (1990) Decay rates, nitrogen fluxes, and decomposer communities of single- and mixed-species foliar litter. Ecology 71:1976–1985
Bligh E, Dryer W (1959) A rapid method of total lipid extraction and purification. Can J Biochem Physiol 37:911–917
Bouma TJ, Bryla DR (2000) On the assessment of root and soil respiration for soils of different textures: interactions with soil moisture contents and soil CO2 concentrations. Plant Soil 227:215–221
Bouyoucos GJ (1962) Hydrometer method improved for making particle size analysis of soils. Agron J 54:464–465
Brunner AM, Busov VB, Strauss SH (2004) Poplar genome sequence: functional genomics in an ecologically dominant plant species. Trends Plant Sci 9:49–56
Collins PJ, Dobson ADW (1997) Generation of species specific DNA probes for the lignin peroxidase genes of white rot fungi. In: Sheehan D (ed) Bioremediation protocols. Humana Press, Totowa, NJ
Cox MS, Gerard PD, Abshire MJ (2006) Selected soil properties’ variability and their relationships with yield in three Mississippi fields. Soil Sci 171:541–551
Coyne MS (1999) Soil microbiology: an exploratory approach. Delmar Publishers, Albany, NY. 462 p
DeForest JL, Zak DR, Pregitzer KS, Burton AJ (2004) Atmospheric nitrate deposition, microbial community composition, and enzyme activity in northern hardwood forests. Soil Sci Soc Am J 68:132–138
Fang C, Radosevich M, Fuhrmann JJ (2001) Characterization of rhizopshere microbial community structure in five similar grass species using FAME and BIOLOG analyses. Soil Biol Biochem 33:679–682
Frostegård Å, Bååth E (1996) The use of phospholipid fatty acid analysis to estimate bacterial and fungal biomass in soil. Biol Fert Soils 22:59–65
Frostegård Å, Tunlid A, Bååth E (1991) Microbial biomass measured as total lipid phosphate in soils of different organic content. J Microbiol Methods 14:151–163
Giardina CP, Ryan MG, Hubbard RM, Binkley D (2001) Tree species and soil textural controls on carbon and nitrogen mineralization rates. Soil Sci Soc Am J 65:1272–1279
Grayston SJ, Griffith GS, Mawdsley JL, Campbell CD, Bardgett RD (2001) Accounting for variability in soil microbial communities of temperate upland grassland ecosystems. Soil Biol Biochem 33:533–551
Halpin C, Thain SC, Tilston EL, Guiney E, Lapierre C, Hopkins DW (2007) Ecological impacts of trees with modified lignin. Tree Genetics & Genomes 3:101–110
Hancock JE, Loya WM, Giardina CP, Li L, Chiang VL, Pregitzer KS (2007) Plant growth, biomass partitioning and soil carbon formation in response to altered lignin biosynthesis in Populus tremuloides. New Phytol 173:732–742
Hart SC, Nason GE, Myrold DD, Perry DA (1994) Dynamics of gross nitrogen transformation in an old-growth forest: the carbon connection. Ecology 75: 880–891
Hassett JE, Zak DR (2005) Aspen harvest intensity decreases microbial biomass, extracellular enzyme activity, and soil nitrogen cycling. Soil Sci Soc Am J 69:227–235
Hénault C, English LC, Halpin C, Andreux F, Hopkins DW (2006) Microbial community structure in soils with decomposing residues from plants with genetic modifications to lignin biosynthesis. FEMS Microbiol Lett 263:68–75
Herrera S (2005) Struggling to see the forest through the trees. Nat Biotechnol 23:165–167
Hobbie SE, Reich PB, Oleksyn J, Ogdahl M, Zytkowiak R, Hale C, Karolewski P (2006) Tree species effects on decomposition and forest floor dynamics in a common garden. Ecology 87:2288–2297
Hu WJ, Harding SA, Lung J, Popko JL, Ralph J, Stokke DD, Tsai CJ, Chiang VL (1999) Repression of lignin biosynthesis promotes cellulose accumulation and growth in transgenic trees. Nature Biotechnol 17:808–812
Karnosky DF, Gagnon ZE, Dickson RE, Coleman MD, Lee EH, Isebrands JG (1996) Changes in growth, leaf abscission, and biomass associated with seasonal tropospheric ozone exposures of Populus tremuloides clones and seedlings. Can J For Res-Rev Can Rech For 26:23–37
Knops JMH, Bradley KL, Wedin DA (2002) Mechanisms of plant species impacts on ecosystem nitrogen cycling. Ecol Lett 5:454–466
Larson JL, Zak DR, Sinsabaugh RL (2002) Extracellular enzyme activity beneath temperate trees growing under elevated carbon dioxide and ozone. Soil Sci Soc Am J 66:1848–1856
Li L, Popko JL, Umezawa T, Chiang VL (2000) 5-Hydroxyconiferyl aldehyde modulates enzymatic methylation for syringyl monolignol formation, a new view of monolignol biosynthesis in angiosperms. J Biol Chem 275:6537–6545
Li L, Zhou Y, Cheng X, Sun J, Marita JM, Ralph J, Chiang VL (2003) Combinatorial modification of multiple lignin traits in trees through multigene cotransformation. Proc Natl Acad Sci USA 100:4939–4944
Littell RC, Stroup WW, Freund RJ (2002) SAS for linear models. SAS Institute Inc., Cary, NC. 466 p
Lorenz K, Lal R (2005) The depth distribution of soil organic carbon in relation to land use and management and the potential of carbon sequestration in subsoil horizons. In Advances in Agronomy, vol 88, pp 35–66
Lynd LR, Weimer PJ, van Zyl WH, Pretorius IS (2002) Microbial cellulose utilization: fundamentals and biotechnology. Microbiol Mol Biol Rev 66:506–577
Madritch M, Donaldson JR, Lindroth RL (2006) Genetic identity of Populus tremuloides litter influences decomposition and nutrient release in a mixed forest stand. Ecosystems 9:529–537
Marschner P, Yang CH, Lieberei R, Crowley DE (2001) Soil and plant specific effects on bacterial community composition in the rhizosphere. Soil Biol Biochem 33:1437–1445
Pilate G, Guiney E, Holt K, Petit-Conil M, Lapierre C, Leple JC, Pollet B, Mila I, Webster EA, Marstorp HG, Hopkins DW, Jouanin L, Boerjan W, Schuch W, Cornu D, Halpin C (2002) Field and pulping performances of transgenic trees with altered lignification. Nat Biotechnol 20:607–612
Ruess L, Tiunov A, Haubert D, Richnow HH, Haggblom MM, Scheu S (2005) Carbon stable isotope fractionation and trophic transfer of fatty acids in fungal based soil food chains. Soil Biol Biochem 37:945–953
SAS (1999) SAS/STAT® User’s Guide, Version 8. SAS Institute Inc., Cary, NC
Schweitzer JA, Bailey JK, Rehill BJ, Martinsen GD, Hart SC, Lindroth RL, Keim P, Whitham TG (2004) Genetically based trait in a dominant tree affects ecosystem processes. Ecol Lett 7:127–134
Sinsabaugh RL, Gallo ME, Lauber C, Waldrop MP, Zak DR (2005) Extracellular enzyme activities and soil organic matter dynamics for northern hardwood forests receiving simulated nitrogen deposition. Biogeochemistry 75:201–215
Six J, Feller C, Denef K, Ogle S, Sa JCM, Albrecht A (2002) Organic matter, biota and aggregation in temperate and tropical soils – Effects of no-tillage. Agronomie: Agric Environ 22:755–775
Six J, Frey SD, Thiet RK, Batten KM (2006) Bacterial and fungal contributions to carbon sequestration in agroecosystems. Soil Sci Soc Am J 70:555–569
Tilston EL, Halpin C, Hopkins DW (2004) Genetic modifications to lignin biosynthesis in field-grown poplar trees have inconsistent effects on the rate of woody trunk decomposition. Soil Biol Biochem 36:1903–1906
Tsai C-J, Podila GK, Chiang VL (1994) Agrobacterium-mediated transformation of quaking aspen (Populus tremuloides) and regeneration of transgenic plants. Plant Cell Reports 14:94–97.
van Aarle IM, Olsson PA (2003) Fungal lipid accumulation and development of mycelial structures by two arbuscular mycorrhizal fungi. Appl Environ Microbiol 69:6762–6767
Waldrop MP, Firestone MK (2006) Response of microbial community composition and function to soil climate change. Microbial Ecol 52:716–724
Webster EA, Halpin C, Chudek JA, Tilston EL, Hopkins DW (2005) Decomposition in soil of soluble, insoluble and lignin-rich fractions of plant material from tobacco with genetic modifications to lignin biosynthesis. Soil Biol Biochem 37:751–760
Weltzin JF, Loik ME, Schwinning S, Williams DG, Fay PA, Haddad BM, Harte J, Huxman TE, Knapp AK, Lin GH, Pockman WT, Shaw MR, Small EE, Smith MD, Smith SD, Tissue DT, Zak JC (2003) Assessing the response of terrestrial ecosystems to potential changes in precipitation. Bioscience 53:941–952
Zak DR, Blackwood CB, Waldrop MP (2006) A molecular dawn for biogeochemistry. Trends Ecol Evol 21:288–295
Zak DR, Tilman D, Parmenter RR, Rice CW, Fisher FM, Vose J, Milchunas D, Martin CW (1994) Plant production and soil microorganisms in late-successional ecosystems: a continental-scale study. Ecology 75:2333–2347
Zar JH (1999) Biostatistical analysis, 4th edn. Prentice Hall, Upper Saddle River, N. J
Zelles L (1999) Fatty acid patterns of phospholipids and lipopolysaccharides in the characterisation of microbial communities in soil: a review. Biol Fertil Soils 29:111–129
Zelles L, Bai GY, Beck T, Beese F (1992) Signature fatty acids in phospholipids and lipopolysaccharides as indicators of microbial biomass and community structure in agricultural soils. Soil Biol Biochem 24:317–323
Acknowledgements
The authors would like to thank Cassie Miller for her assistance in the greenhouse and the lab, and Joe Bump, Alan Talhelm, and two anonymous reviewers for comments on earlier versions of this manuscript. We thank the Central Plains Experimental Range, Konza Prairie Biological Station, and the Blackland Research and Extension Center in Temple, Texas, for access to soils used in this experiment. This work was funded by the US Department of Energy BER, the North Central Research Station of the USDA Forest Service, and the graduate school of Michigan Technological University.
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Bradley, K.L., Hancock, J.E., Giardina, C.P. et al. Soil microbial community responses to altered lignin biosynthesis in Populus tremuloides vary among three distinct soils. Plant Soil 294, 185–201 (2007). https://doi.org/10.1007/s11104-007-9246-0
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DOI: https://doi.org/10.1007/s11104-007-9246-0