Characterization and expression analysis of WRKY genes during leaf and corolla senescence of Petunia hybrida plants

Astigueta, Francisco Horacio; Baigorria, Amilcar H.; García, Martín; Delfosse, Verónica Cecilia; González, Sergio; Torre, Mariana Cecilia Pérez de la; Moschen, Sebastián; Lia, Verónica Viviana; Heinz, Ruth Amelia; Fernández, Paula; Trupkin, Santiago Ariel

doi:10.1007/s12298-022-01243-y

Cited by 5 publications

(1 citation statement)

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“…Transcriptomics can also be used to identify how regulatory genes that have been better characterised in models, such as Arabidopsis leaf senescence, apply to the floral senescence of ornamental species. For example, an analysis of WRKY TFs in petunia identified specific members of the gene family likely associated with petunia corolla senescence [ 30 ]. Downstream from transcriptomes, proteomes are also clearly important in understanding gene function.…”

Section: Floral Omics In Ornamental Speciesmentioning

confidence: 99%

How far can omics go in unveiling the mechanisms of floral senescence?

Rogers

2023

Biochemical Society Transactions

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Floral senescence is of fundamental interest in understanding plant developmental regulation, it is of ecological and agricultural interest in relation to seed production, and is of key importance to the production of cut flowers. The biochemical changes occurring are well-studied and involve macromolecular breakdown and remobilisation of nutrients to developing seeds or other young organs in the plant. However, the initiation and regulation of the process and inter-organ communication remain to be fully elucidated. Although ethylene emission, which becomes autocatalytic, is a key regulator in some species, in other species it appears not to be as important. Other plant growth regulators such as cytokinins, however, seem to be important in floral senescence across both ethylene sensitive and insensitive species. Other plant growth regulators are also likely involved. Omics approaches have provided a wealth of data especially in ornamental species where genome data is lacking. Two families of transcription factors: NAC and WRKY emerge as major regulators, and omics information has been critical in understanding their functions. Future progress would greatly benefit from a single model species for understanding floral senescence; however, this is challenging due to the diversity of regulatory mechanisms. Combining omics data sets can be powerful in understanding different layers of regulation, but in vitro biochemical and or genetic analysis through transgenics or mutants is still needed to fully verify mechanisms and interactions between regulators.

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Section: Floral Omics In Ornamental Speciesmentioning

confidence: 99%