Vicky Buchanan-Wollaston

TL;DR: Experiments with transgenic plants and mutants are already shedding light on the role played by cytokinins and ethylene in regulating senescence in leaves, and analysis of the regulatory mechanisms controlling the expression ofSenescence-induced genes will allow the signalling pathways that are involved in the regulation of senescences to be elucidated.

TL;DR: The current understanding of the mechanisms by which plants control senescence and the processes that are involved is presented.

TL;DR: Experiments show, for the first time, that the salicylic acid (SA)-signalling pathway has a role in the control of gene expression during developmental senescence, and suggest that a combination of signalling factors is required for the optimum expression of many genes duringsenescence.

TL;DR: Evidence is presented to indicate that the extent of LSC54 expression is related to levels of oxidative stress in the tissues, and one gene, encoding a lipid hydroperoxide-dependent glutathione peroxidase, showed increased expression in the protected tissue, which may indicate a role for this enzyme in the protection of plant tissue from oxidative stress.

TL;DR: The results indicate that the effects of UV-B on the three sets of genes are mediated through three distinct signal transduction pathways which are similar, but not identical, to pathways initiated in response to pathogen infection.