Hello to all, This is somewhat technical, but of interest to a number of list readers I hope! It is from Stanford University's Science Mailer. Gary in Hilo, HI Adverse growth conditions, such as excess drought and salinity, tend to cause stunted growth in plants. Achard et al. (p. 91) now show that this growth restraint is an actively controlled process, not simply a by-product of disrupted metabolism. The growth restraint is imposed by DELLA proteins, normally localized to the cell nucleus. Arabidopsis has five related DELLA proteins encoded in its genome. The DELLA family of proteins seems to integrate hormonal and environmental signals in order to fine-tune the balance between growth and survival.