title: From ecophysiology to phenomics: some implications of photoprotection and shade-sun acclimation in situ for dynamics of thylakoids in vitro.
abstract: Half a century of research into the physiology and biochemistry of sun-shade acclimation in diverse plants has provided reality checks for contemporary understanding of thylakoid membrane dynamics. This paper reviews recent insights into photosynthetic efficiency and photoprotection from studies of two xanthophyll cycles in old shade leaves from the inner canopy of the tropical trees Inga sapindoides and Persea americana (avocado). It then presents new physiological data from avocado on the time frames of the slow coordinated photosynthetic development of sink leaves in sunlight and on the slow renovation of photosynthetic properties in old leaves during sun to shade and shade to sun acclimation. In so doing, it grapples with issues in vivo that seem relevant to our increasingly sophisticated understanding of ΔpH-dependent, xanthophyll-pigment-stabilized non-photochemical quenching in the antenna of PSII in thylakoid membranes in vitro.
authors.affiliation: IBG-2: Pflanzenwissenschaften, Forschungszentrum Jülich, Jülich, Germany.
authors.forename: Shizue
authors.initials: S
authors.lastname: Matsubara
authors.forename: Britta
authors.initials: B
authors.lastname: Förster
authors.forename: Melinda
authors.initials: M
authors.lastname: Waterman
authors.forename: Sharon A
authors.initials: SA
authors.lastname: Robinson
authors.forename: Barry J
authors.initials: BJ
authors.lastname: Pogson
authors.forename: Brian
authors.initials: B
authors.lastname: Gunning
authors.forename: Barry
authors.initials: B
authors.lastname: Osmond
mesh_terms: D000064:Acclimatization; D002734:Chlorophyll / Q000378:metabolism; D003624:Darkness; D017753:Ecosystem; D005453:Fluorescence; D010084:Oxidation-Reduction; D027421:Persea / Q000378:metabolism / Q000502:physiology / Q000528:radiation effects; D055668:Photochemical Processes; D010788:Photosynthesis; D045332:Photosystem II Protein Complex / Q000378:metabolism; D018515:Plant Leaves / Q000378:metabolism / Q000502:physiology / Q000528:radiation effects*; D013472:Sunlight; D020524:Thylakoids / Q000378:metabolism / Q000502:physiology* / Q000528:radiation effects; D024341:Xanthophylls / Q000378:metabolism
chemical_list: D045332:Photosystem II Protein Complex; D024341:Xanthophylls; D002734:Chlorophyll