Article Abstract:
Regulation in plants of auxin response by the protein kinase PINOID is discussed. Arabidopsis plants with PINOID (PID) gene mutations have a pleiotropic shoot phenotype mimicking that of plants grown on auxin transport inhibitor or plants mutated for the auxin efflux carrier PINFORMED (PIN) with various defects. PID was cloned and found to be transiently expressed in the embryo and in starting floral anlagen. That shows a specific role for PID in promoting primordium development.
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Article Abstract:
Research has been conducted on the homeogenic gene important for the organ fate specification and stem cell proliferation limitation in Arabidopsis flowers. Results indicate that the floral protein expressed throughout the flower cooperates with the homeodomain protein and activates the homeogenic gene in the center of the flower.
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Article Abstract:
A study tests the proposal that a common set of signaling components might integrate inputs from multiple hormones to regulate growth, by asking whether different hormones converge on a common set of transcriptional targets in Arabidopsis seedlings. Results show that different hormones appear to regulate distinct members of protein families, leading to the conclusion that there is no core transcriptional growth-regulatory module in young Arabidopsis seedlings.
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