Journal
PLANT CELL REPORTS
Volume 25, Issue 1, Pages 62-70Publisher
SPRINGER
DOI: 10.1007/s00299-005-0035-z
Keywords
auxin; mycorrhiza; phosphate; Terfezia; transformed roots
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One clone (M-2), out of several Agrobacterium rhizogenes transformed root clones of Cistus incanus, formed ecto- or endomycorrhiza in vitro with two isolates of Terfezia boudieri collected in Israel. All other clone-fungal isolate combinations formed ectomycorrhiza. The endomycorrhiza-forming isolate secreted smaller amounts of auxin than an ectomycorrhiza-forming isolate. Addition of 2,4-dichlorophenoxyacetic acid (2,4-D) led to ectomycorrhiza formation by the M-2 clone on low P medium. Endomycorrhizas were formed by both M-2 and a control clone with the same T. boudieri isolates on high P medium with 2,4-D. The M-2 clone of C. incanus exhibited greater sensitivity to exogenous auxins (IAA and 2,4-D) than other clones, and clonal sensitivity to auxin was increased tenfold under low P conditions. Results are discussed in relation to phosphate and auxin influence on T. boudieri-C. incanus interaction.
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