title: A Decrease in Ambient Temperature Induces Post-Mitotic Enlargement of Palisade Cells in North American Lake Cress.
abstract: In order to maintain organs and structures at their appropriate sizes, multicellular organisms orchestrate cell proliferation and post-mitotic cell expansion during morphogenesis. Recent studies using Arabidopsis leaves have shown that compensation, which is defined as post-mitotic cell expansion induced by a decrease in the number of cells during lateral organ development, is one example of such orchestration. Some of the basic molecular mechanisms underlying compensation have been revealed by genetic and chimeric analyses. However, to date, compensation had been observed only in mutants, transgenics, and γ-ray-treated plants, and it was unclear whether it occurs in plants under natural conditions. Here, we illustrate that a shift in ambient temperature could induce compensation in Rorippa aquatica (Brassicaceae), a semi-aquatic plant found in North America. The results suggest that compensation is a universal phenomenon among angiosperms and that the mechanism underlying compensation is shared, in part, between Arabidopsis and R. aquatica.
authors.affiliation: Department of Bioresource and Environmental Sciences, Kyoto Sangyo University, Kyoto-City, Kyoto, Japan.
authors.forename: Rumi
authors.initials: R
authors.lastname: Amano
authors.affiliation: Department of Bioresource and Environmental Sciences, Kyoto Sangyo University, Kyoto-City, Kyoto, Japan.|Department of Plant Biology, University of California Davis, Davis, California, United States of America.
authors.forename: Hokuto
authors.initials: H
authors.lastname: Nakayama
authors.affiliation: Department of Biology, Tokyo Gakugei University, Koganei-City, Tokyo, Japan.
authors.forename: Yurika
authors.initials: Y
authors.lastname: Morohoshi
authors.affiliation: Department of Bioresource and Environmental Sciences, Kyoto Sangyo University, Kyoto-City, Kyoto, Japan.
authors.forename: Yaichi
authors.initials: Y
authors.lastname: Kawakatsu
authors.affiliation: Department of Biology, Tokyo Gakugei University, Koganei-City, Tokyo, Japan.
authors.forename: Ali
authors.initials: A
authors.lastname: Ferjani
authors.affiliation: Department of Bioresource and Environmental Sciences, Kyoto Sangyo University, Kyoto-City, Kyoto, Japan.
authors.forename: Seisuke
authors.initials: S
authors.lastname: Kimura
mesh_terms: D017360:Arabidopsis / Q000166:cytology / Q000235:genetics / Q000254:growth & development*; D002450:Cell Communication; D002453:Cell Cycle; D049109:Cell Proliferation; D048429:Cell Size; D004777:Environment; D018506:Gene Expression Regulation, Plant; D008938:Mitosis; D010641:Phenotype; D010802:Phylogeny; D018515:Plant Leaves / Q000166:cytology; D018521:Plant Physiological Phenomena; D031225:Rorippa / Q000166:cytology / Q000235:genetics / Q000254:growth & development*; D013045:Species Specificity; D013696:Temperature