title: Introduction to a Virtual Issue on plant senescence.
authors.affiliation: IBERS, Aberystwyth University, Edward Llwyd Building, Aberystwyth, Ceredigion, SY23 3DA, UK. hot@aber.ac.uk.
authors.forename: Howard
authors.initials: H
authors.lastname: Thomas
authors.affiliation: IBERS, Aberystwyth University, Edward Llwyd Building, Aberystwyth, Ceredigion, SY23 3DA, UK.
authors.forename: Helen
authors.initials: H
authors.lastname: Ougham
keywords: ageing; death; life cycle; pigmentation; senescence; virtual issue