title: Molecular Profiles of Contrasting Shade Response Strategies in Wild Plants: Differential Control of Immunity and Shoot Elongation.
abstract: Plants growing at high densities elongate their shoots to reach for light, a response known as the shade avoidance syndrome (SAS). Phytochrome-mediated detection of far-red light reflection from neighboring plants activates growth-promoting molecular pathways leading to SAS However, it is unknown how plants that complete their life cycle in the forest understory and are shade tolerant prevent SAS when exposed to shade. Here, we show how two wildGeraniumspecies from different native light environments regulate contrasting responses to light quality cues. A comparative RNA sequencing approach unveiled the molecular underpinnings of their contrasting growth responses to far-red light enrichment. It also identified differential phytochrome control of plant immunity genes and confirmed that far-red enrichment indeed contrastingly affects resistance againstBotrytis cinereabetween the two species. Furthermore, we identify a number of candidate regulators of differential shade avoidance. Three of these, the receptor-like kinases FERONIA and THESEUS1 and the non-DNA binding bHLH protein KIDARI, are functionally validated inArabidopsis thalianathrough gene knockout and/or overexpression studies. We propose that these components may be associated with either showing or not showing shade avoidance responses.
authors.affiliation: Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands.
authors.forename: Charlotte M M
authors.identifier: 0000-0002-0817-5134
authors.initials: CM
authors.lastname: Gommers
authors.affiliation: Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands.
authors.forename: Diederik H
authors.initials: DH
authors.lastname: Keuskamp
authors.affiliation: Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands.
authors.forename: Sara
authors.initials: S
authors.lastname: Buti
authors.affiliation: Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands.
authors.forename: Hans
authors.initials: H
authors.lastname: van Veen
authors.affiliation: Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands.
authors.forename: Iko T
authors.identifier: 0000-0002-8973-5518
authors.initials: IT
authors.lastname: Koevoets
authors.affiliation: Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands.
authors.forename: Emilie
authors.initials: E
authors.lastname: Reinen
authors.affiliation: Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands.
authors.forename: Laurentius A C J
authors.initials: LA
authors.lastname: Voesenek
authors.affiliation: Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands r.pierik@uu.nl.
authors.forename: Ronald
authors.identifier: 0000-0002-5320-6817
authors.initials: R
authors.lastname: Pierik
mesh_terms: D017360:Arabidopsis / Q000254:growth & development / Q000502:physiology / Q000528:radiation effects; D020171:Botrytis; D060467:Disease Resistance / Q000235:genetics; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D031315:Geranium / Q000254:growth & development / Q000382:microbiology / Q000502:physiology / Q000528:radiation effects; D010935:Plant Diseases / Q000276:immunology / Q000382:microbiology; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism / Q000502:physiology; D018520:Plant Shoots / Q000254:growth & development / Q000382:microbiology / Q000502:physiology* / Q000528:radiation effects; D017423:Sequence Analysis, RNA; D013045:Species Specificity; D013312:Stress, Physiological; D059467:Transcriptome
chemical_list: D010940:Plant Proteins