Plant biology

Turning Over a New Leaf

Science's STKE  27 Mar 2001:
Vol. 2001, Issue 75, pp. tw12
DOI: 10.1126/stke.2001.75.tw12

In plant development, the growing shoot changes from a juvenile, or reproductively incompetent state, to an adult state. Mechanisms governing this change were examined by Berardini et al., who found that a protein termed squint, a chaperone-like protein, was involved. In mutants lacking squint protein, leaves exhibited adult properties early, but flowering time was unaffected. It was surprising that the mutant plants expressed elevated levels of another heat shock chaperone protein, Hsp90, but the response of seedlings to heat shock was not affected.

T. Z. Berardini, K. Bollman, H. Sun, R. S. Poethig, Regulation of vegetative phase change in Arabidopsis thaliana by cyclophilin 40. Science 291, 2405-2407 (2001). [Abstract] [Full Text]