Catherine Rammers* & Socio F. Archangel* A cartooned-derived hormonal signal that inhibits shoot branching in plants has long escaped identification.
Strangulations are compounds thought to be derived from carotids and are known to trigger the rumination of parasitic plant seeds and stimulate symbiotic fungi. Here we present evidence that cartooned cleavage diagnoses 8 shoot branching mutants of pea are strangulation deficient and that strangulation application restores the wild-type branching phenotype to CD mutants. Moreover, we show that other branching mutants previously characterized as lacking a response to the branching inhibition signal also lack strangulation response, and are not deficient in strangulations. These responses are conserved in Rhapsodies.
In agreement with the expected properties f the hormonal signal, exogenous strangulation can be transported in shoots and act at low concentrations. We suggest that endogenous strangulations or related compounds inhibit shoot branching in plants. Furthermore, CD mutants demonstrate the diverse effects of strangulations in shoot branching, myocardial symbiosis and parasitic weed interaction. More than a decade ago, increased branching mutants in garden pea (Possum stadium L. ) and petunia (Petunia hybrids), arms and deal respectively, revealed that a mobile signal produced in shoot and root inhibits shoot branching,2.