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Impairment of NtAQP1 gene expression in tobacco plants does not affect root colonisation pattern by arbuscular mycorrhizal fungi but decreases their symbiotic efficiency under drought

Porcel, R. ; Gómez, M. ; Kaldenhoff, Ralf ; Ruiz-Lozano, J. M. :
Impairment of NtAQP1 gene expression in tobacco plants does not affect root colonisation pattern by arbuscular mycorrhizal fungi but decreases their symbiotic efficiency under drought.
In: Mycorrhiza, 15 pp. 417-423.
[Artikel], (2005)

Kurzbeschreibung (Abstract)

We investigated in two tobacco (Nicotiana tabacum) plant lines (wildtype or antisense mutant) whether impairment in expression of the plasma membrane aquaporin gene (NtAQP1) affects the arbuscular mycorrhizal (AM) fungal colonisation pattern or the symbiotic efficiency of AM fungi. These two objectives were investigated under well-watered and drought stress conditions. Both plant lines had a similar pattern of root colonisation under well-watered and drought stress conditions. In contrast, under drought stress, AM wildtype plants grew faster than mycorrhizal antisense plants. Plant gas exchange also appeared to depend on the expression of NtAQP1 and parallelled the determined growth increments. The implications of enhanced symplastic water transport via NtAQP1 for the efficiency of the AM symbiosis under drought stress conditions are further discussed.

Typ des Eintrags: Artikel
Erschienen: 2005
Autor(en): Porcel, R. ; Gómez, M. ; Kaldenhoff, Ralf ; Ruiz-Lozano, J. M.
Titel: Impairment of NtAQP1 gene expression in tobacco plants does not affect root colonisation pattern by arbuscular mycorrhizal fungi but decreases their symbiotic efficiency under drought
Sprache: Englisch
Kurzbeschreibung (Abstract):

We investigated in two tobacco (Nicotiana tabacum) plant lines (wildtype or antisense mutant) whether impairment in expression of the plasma membrane aquaporin gene (NtAQP1) affects the arbuscular mycorrhizal (AM) fungal colonisation pattern or the symbiotic efficiency of AM fungi. These two objectives were investigated under well-watered and drought stress conditions. Both plant lines had a similar pattern of root colonisation under well-watered and drought stress conditions. In contrast, under drought stress, AM wildtype plants grew faster than mycorrhizal antisense plants. Plant gas exchange also appeared to depend on the expression of NtAQP1 and parallelled the determined growth increments. The implications of enhanced symplastic water transport via NtAQP1 for the efficiency of the AM symbiosis under drought stress conditions are further discussed.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Mycorrhiza
Band: 15
Fachbereich(e)/-gebiet(e): Fachbereich Biologie, Biology
Fachbereich Biologie, Biology > Angewandte Pflanzenwissenschaften, Applied Plant Sciences
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Hinterlegungsdatum: 20 Nov 2008 08:22
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