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| Web URL(s): | http://www.tandfonline.com/doi/pdf/10.1080/01904169909365675
Last checked: 10/13/2015
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| Publication Type:
| Report |
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| Author(s): | Malinowski, D. P.;
Belesky, D. P. |
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| Author Affiliation: | Malinowski: Research and Extension Center, Texas A & M University, Vernon, TX; Belesky: United States Department of Agriculture, Agricultural Research Service, Appalachian Soil and Water Conservation Laboratory, Beaver, WV |
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| Title: | Neotyphodium coenophialum-endophyte infection affects the ability of tall fescue to use sparingly available phosphorus |
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| Source: | Journal of Plant Nutrition. Vol. 22, No. 4/5, 1999, p. 835-853. |
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| Publishing Information: | New York: Marcel Dekker, Inc. |
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| # of Pages: | 19 |
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| Keywords: | TIC Keywords: Acremonium coenophialum; Endophytes; Festuca arundinacea; Phosphorus; Nutrient deficiency; Growth; Nutrient uptake; Nutrient availability; Soil types; Fertilization; Dry weight; Roots; Shoots; Calcium; Growth rate; In vitro; Relative growth rate; Soil pH; Root-shoot ratio
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| Abstract/Contents: | "Neotyphodium coenophialum, (Morgan-Jones & Gams) Glenn, Bacon & Hanlin, infected tall fescue (Festuca arundinacea Schreb.) plants perform better than non-infected isolines on phosphorus (P)-deficient soils. Our objective was to characterize growth and P uptake dynamics of tall fescue in response to endophyte infection and P source at low P availability in soil. Two tall fescue genotypes (DN2 and DN4) infected with their naturally occurring N. coenophialum strains (E+) and in noninfected (E-) forms were grown in Lily soil (fine loamy siliceous, mesic Typic Hapludult) in a greenhouse for 20 weeks. Three soil P treatments were imposed: no P supplied (control) and P supplied as commercial fertilizer (PF) or as phosphate rock (PR) at the level of 25 mg P kg⁻1 soil. Interaction of tall fescue genotype and endophyte status had a significant influence on mineral element uptake suggesting high specificity of endophyte-tall fescue associations. Endophyte infection did not affect dry root matter (DM) when no P was supplied but shoot DM was reduced by 20%. More biomass was produced and greater P uptake rate occurred in PR than PF treatment. Root DM was greater in E+ DN4 than E- DN4 when supplied with either PF or PR. In contrast, endophyte infection did not affect root DM of DN2, regardless of P source. Relative growth rate (RGR) of E+ plants grown with PR was 16% greater than that of E- plants. Endophyte infection did not improve growth or P uptake in PF treatment. When PR was supplied, P uptake rate was 24% greater in E+ DN2 than E- DN2, but endophyte infection did not benefit DN4. Phosphorus-use efficiency was 6% less in E+ DN2 but 16% greater in E+ DN4 compared to E- plants, regardless of P source. Root exudates of E+ DN2, but not E+ DN4 solubilized more P from PR than those of E- plants. The correlation between root RGR and P uptake rate was relatively high for E- plants (r=0.76), but low for E+ plants (r=0.27) grown with PR. Results suggest that P uptake by E+ tall fescue might rely on mechanisms other than an increase in root biomass (surface area). Endophyte infection modified tall fescue responses to P source. This phenomenon was associated with modes of P acquisition which included enhanced activity of root exudates in releasing P from PR in E+ plants (DN2), and increased root biomass (DN4). The dominant means of P acquisition may be determined by a specific association of endophyte and tall fescue genomes. Endophyte-tall fescue association plasticity contributes to widespread success of symbiotic in marginal resource conditions." |
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| Language: | English |
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| References: | 54 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Malinowski, D. P., and D. P. Belesky. 1999. Neotyphodium coenophialum-endophyte infection affects the ability of tall fescue to use sparingly available phosphorus. J. Plant Nutr. 22(4/5):p. 835-853. |
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| Web URL(s):
http://www.tandfonline.com/doi/pdf/10.1080/01904169909365675
Last checked: 10/13/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: QK 867 .J67 |
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