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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
22/10/1999 |
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Data da última atualização: |
22/10/1999 |
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Autoria: |
MULLER, J.; MOHR, U.; SPRENGER, N.; BORTLIK, K.; BOLLER, T.; WIEMKEN, A. |
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Título: |
Pool size of fructans in roots and leaves of mycorrhizal and non-mycorrhizal barley. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
New Phytologist, Oxford, v. 142, p. 551-559, 1999. |
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Idioma: |
Inglês |
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Conteúdo: |
The effect of arbuscular mycorrhizas on fructan accumulation was studied in barley (Hordeum vulgare) infected with Glomus mosseae. Treatments with and without fertilizer were included in order to distinguish between mere fertilizer effects and the effects of the symbiosis, and plants were harvested at two different time points, 35 and 50 d after planting. Fructan was the major storage carbohydrate in both leaves and roots. The amounts of fructan were markedly altered in the mycorrhizal plants. In roots of non-fertilized mycorrhizal plants, fructan pools were significantly greater than in the corresponding non-mycorrhizal plants. By contrast, fertilization caused a general decrease in amounts of fructan in roots. The increase of fructan in mycorrhizal roots was correlated with a decrease of invertase activity. In leaves, fructan pools decreased or remained unchanged upon mycorrhizal infection; fertilization had a similar effect. However, when individual leaves of a plant were compared, intriguing effects of the mycorrhizal symbiosis could be observed. Whereas in non-mycorrhizal plants, the youngest leaves had the highest fructan contents and the oldest leaves the lowest (as previously reported), this gardient was markedly altered in mycorrhizal plants, indicating systemic effects of mycorrhiza on assimilate partitioning in shoots. |
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Thesagro: |
Carboidrato; Folha; Metabolismo; Micorriza; Raiz; Simbiose. |
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Thesaurus Nal: |
carbohydrates; leaves; metabolism; mycorrhizae; roots; symbiosis. |
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Categoria do assunto: |
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Marc: |
LEADER 02149naa a2200325 a 4500
001 1621115
005 1999-10-22
008 1999 bl --- 0-- u #d
100 1 $aMULLER, J.
245 $aPool size of fructans in roots and leaves of mycorrhizal and non-mycorrhizal barley.
260 $c1999
520 $aThe effect of arbuscular mycorrhizas on fructan accumulation was studied in barley (Hordeum vulgare) infected with Glomus mosseae. Treatments with and without fertilizer were included in order to distinguish between mere fertilizer effects and the effects of the symbiosis, and plants were harvested at two different time points, 35 and 50 d after planting. Fructan was the major storage carbohydrate in both leaves and roots. The amounts of fructan were markedly altered in the mycorrhizal plants. In roots of non-fertilized mycorrhizal plants, fructan pools were significantly greater than in the corresponding non-mycorrhizal plants. By contrast, fertilization caused a general decrease in amounts of fructan in roots. The increase of fructan in mycorrhizal roots was correlated with a decrease of invertase activity. In leaves, fructan pools decreased or remained unchanged upon mycorrhizal infection; fertilization had a similar effect. However, when individual leaves of a plant were compared, intriguing effects of the mycorrhizal symbiosis could be observed. Whereas in non-mycorrhizal plants, the youngest leaves had the highest fructan contents and the oldest leaves the lowest (as previously reported), this gardient was markedly altered in mycorrhizal plants, indicating systemic effects of mycorrhiza on assimilate partitioning in shoots.
650 $acarbohydrates
650 $aleaves
650 $ametabolism
650 $amycorrhizae
650 $aroots
650 $asymbiosis
650 $aCarboidrato
650 $aFolha
650 $aMetabolismo
650 $aMicorriza
650 $aRaiz
650 $aSimbiose
700 1 $aMOHR, U.
700 1 $aSPRENGER, N.
700 1 $aBORTLIK, K.
700 1 $aBOLLER, T.
700 1 $aWIEMKEN, A.
773 $tNew Phytologist, Oxford$gv. 142, p. 551-559, 1999.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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