Analysis of mycorrhizal associations formed by Cistus incanus transformed root clones with Terfezia boudieri isolates.
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.
Zaretsky
M
M
Department of Life Sciences, Ben Gurion University, POB 653, Beer Sheva, Israel.
Kagan-Zur
V
V
Mills
D
D
Roth-Bejerano
N
N
D001203:Ascomycota / Q000502:physiology*; D029758:Cistus / Q000382:microbiology*; D007210:Indoleacetic Acids / Q000378:metabolism / Q000494:pharmacology; D038821:Mycorrhizae / Q000187:drug effects / Q000502:physiology*; D018517:Plant Roots / Q000166:cytology / Q000187:drug effects / Q000254:growth & development / Q000382:microbiology*; D014170:Transformation, Genetic
D007210:Indoleacetic Acids