Transcriptional regulation of plant senescence: from functional genomics to systems biology

Plant Biology
Emily BreezeVicky Buchanan-Wollaston

Abstract

Leaf senescence is an active process that involves the increased expression of many hundreds of genes. Many putative transcription factors show enhanced transcription during leaf senescence in Arabidopsis and functional analysis of these should help to indicate their role in controlling gene expression during leaf senescence. In this paper, we describe the analysis of knockout insertion mutants in two different senescence-enhanced genes, one encodes a heat shock transcription factor and the other a zinc finger protein. Plants mutated in these genes show accelerated leaf senescence and reduced tolerance to drought stress, indicating that expression of these genes during senescence has a protective role to maintain viability during this essential developmental process. Analysis of gene expression changes in both mutants compared to the wild-type plants indicates an increased rate of senescence but does not show clearly the pathway that is dependent on these genes for expression. The complexities of signalling networks in plant stress and the plasticity of plant responses mean that the direct consequences of mutation are very difficult to define. The usefulness of this type of approach to address the burning question of how senesc...Continue Reading

References

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Citations

Jul 16, 2009·BMC Evolutionary Biology·Howard ThomasHelen Ougham
Jul 2, 2015·Plant Biotechnology Journal·Sebastián MoschenRuth A Heinz
Jan 1, 2013·Toxicology Letters·Chanemougasoundharam Arunachalam, Fiona M Doohan
Aug 28, 2012·Plant Science : an International Journal of Experimental Plant Biology·Morgane GicquelFrancisco Cabello-Hurtado
Sep 20, 2008·Plant Biology·K Krupinska, K Humbeck
Jul 8, 2015·BMC Plant Biology·Anne V Brown, Karen A Hudson
Apr 8, 2020·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Nihal Gören-SağlamVicky Buchanan-Wollaston
Jul 1, 2009·Current Opinion in Endocrinology, Diabetes, and Obesity

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