LeratLapointePicheEtAl2003

Référence

Lerat, S., Lapointe, L., Piche, Y. and Vierheilig, H. (2003) Variable carbon-sink strength of different Glomus mosseae strains colonizing barley roots. Canadian Journal of Botany, 81(8):886-889.

Résumé

Root carbon (C) partitioning was investigated in barley (Hordeum vulgare L.) colonized by one of three strains of the arbuscular mycorrhizal fungus (AMF) Glomus mosseae (Nicolson & Gerdemann) Gerd. & Trappe. The roots of each plant were evenly divided between two compartments of a split-root system and one side was inoculated with one of the three AMF strains. Twenty-three days after inoculation barley shoots were labeled with (CO2)-C-14. Twenty-four hours later, plants were harvested and the mycorrhizal (M) and nonmycorrhizal (NM) roots were analyzed separately for C-14. Partitioning of C between M and NM sides differed between the fungal strains: BEG 54 was a strong C sink, BEG 55 was a moderately strong C sink, and BEG 12 showed similar C-sink strength as the non-inoculated control plants. The observed differences in C-sink strength mirrored differences in plant dry biomass. Total plant dry biomass of plants inoculated with BEG 12, BEG54, and BEG 55 represented 81.3%, 65.3%, and 73.4% of the biomass of the control plants, respectively. This paper is the first report of an AMF strain-specific variation of C partitioning in M plants in a split-root system.

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@ARTICLE { LeratLapointePicheEtAl2003,
    AUTHOR = { Lerat, S. and Lapointe, L. and Piche, Y. and Vierheilig, H. },
    TITLE = { Variable carbon-sink strength of different Glomus mosseae strains colonizing barley roots },
    JOURNAL = { Canadian Journal of Botany },
    YEAR = { 2003 },
    VOLUME = { 81 },
    PAGES = { 886-889 },
    NUMBER = { 8 },
    NOTE = { Times Cited: 5 Article English Cited References Count: 23 727dj },
    ABSTRACT = { Root carbon (C) partitioning was investigated in barley (Hordeum vulgare L.) colonized by one of three strains of the arbuscular mycorrhizal fungus (AMF) Glomus mosseae (Nicolson & Gerdemann) Gerd. & Trappe. The roots of each plant were evenly divided between two compartments of a split-root system and one side was inoculated with one of the three AMF strains. Twenty-three days after inoculation barley shoots were labeled with (CO2)-C-14. Twenty-four hours later, plants were harvested and the mycorrhizal (M) and nonmycorrhizal (NM) roots were analyzed separately for C-14. Partitioning of C between M and NM sides differed between the fungal strains: BEG 54 was a strong C sink, BEG 55 was a moderately strong C sink, and BEG 12 showed similar C-sink strength as the non-inoculated control plants. The observed differences in C-sink strength mirrored differences in plant dry biomass. Total plant dry biomass of plants inoculated with BEG 12, BEG54, and BEG 55 represented 81.3%, 65.3%, and 73.4% of the biomass of the control plants, respectively. This paper is the first report of an AMF strain-specific variation of C partitioning in M plants in a split-root system. },
    KEYWORDS = { arbuscular mycorrhizal fungi barley (hordeum vulgare) carbon sink glomus mosseae strain variability arbuscular-mycorrhizal fungi systemic suppression plants colonization expression diversity responses phosphate symbiosis },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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