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| Web URL(s): | http://www.tandfonline.com/doi/pdf/10.1080/01904169909365716
Last checked: 10/13/2015
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Access conditions: Item is within a limited-access website |
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| Publication Type:
| Report |
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| Author(s): | Malinowski, Dariusz P.;
Belesky, David P. |
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| Author Affiliation: | United States Department of Agriculture, Appalachian Farming Systems Research Center, Beaver, WV |
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| Title: | Tall fescue aluminum tolerance is affected by Neotyphodium coenophialum endophyte |
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| Source: | Journal of Plant Nutrition. Vol. 22, No. 8, 1999, p. 1335-1349. |
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| Publishing Information: | New York: Marcel Dekker, Inc. |
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| # of Pages: | 15 |
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| Keywords: | TIC Keywords: Festuca arundinacea; Aluminum; Toxicity; Acremonium coenophialum; Endophytes; Phenolic acids; Chelates; Chemical composition; Resistance; Root weight; Dry weight; Shoots; Genotypes; Phosphorus; Root growth; Shoot growth; Root-shoot ratio; Minerals; Physiological responses; Magnesium; Calcium; pH
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| Abstract/Contents: | "Roots of endophyte-infected (E+) tall fescue (Festuce arundinacea Schreb.) exude more phenolic-like reductants than roots of endophyte-free (E-) plants when mineral stressed. Phenolic compounds are efficient chelators of aluminum (Al) and may influence Al tolerance in many plant species. The objective of our study was to determine if enhanced release of phenolic compounds by roots of E+ plants contributes to A1 tolerance in tall fescue. Two cloned genotypes (DN2 and DN11) of tall fescue infected with their naturally occurring fungal endophyte Neotyphodium coenophialum (Morgan-Jones and Gams) Glenn, Bacon and Hanlin and their noninfected isolines were grown in nutrient solutions at 0μ Al(Al-) and at 640μ Al (Al+) under controlled environment conditions. Root and shoot dry matter (DM) of endophyte-infected tall fescue conditions. Root and shoot dry matter (DM) of endophyte-infected tall fescue was greater in E+ than E- plants by 57% and 40%, respectively, when plants were grown without A1. Endophyte infection did not affect root and shoot DM of tall fescue grown with A1 but relative (to A1-treatment) reduction in root and shoot DM was greater in E+ than E- plants. In response to A1 stress, more A1(47%) and P(49%) could be desorbed from root surfaces of E+ than E- plants. Aluminum concentrations in roots of E+ plants were 35% greater and P concentrations were 10% less than those determined in roots of E- plants. No differences in mineral concentrations were observed in shoots, regardless of endophyte status, or A1 level in nutrient solution. Roots of E+ plants increased pH of both Al- and Al+ nutrient solutions to a greater extent than roots of E- plants in a 48 h interval. Our results show that more A1 can be sequestered on root surfaces and in root tissues of endophyte-infected tall fescue than in plants devoid of endophyte. Aluminum sequestration was greater on root surfaces and in root tissues of E+ than E- plants of a given tall fescue genotype. Our results suggest that increased exudation of phenolic-like compounds from roots of endophyte-infected tall fescue may be directly involved in A1 tolerance and serves as a mechanism for widespread adaptability and success of endophyte-tall fescue associations." |
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| Language: | English |
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| References: | 40 |
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| See Also: | Other items relating to: MICRO
Other items relating to: Carbon sequestration of turf |
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| Note: | Graphs
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Malinowski, D. P., and D. P. Belesky. 1999. Tall fescue aluminum tolerance is affected by Neotyphodium coenophialum endophyte. J. Plant Nutr. 22(8):p. 1335-1349. |
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| Web URL(s):
http://www.tandfonline.com/doi/pdf/10.1080/01904169909365716
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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