Ethylene-induced hyponastic growth in Arabidopsis thaliana is controlled by ERECTA.
Plants can respond quickly and profoundly to detrimental changes in their environment. For example, Arabidopsis thaliana can induce an upward leaf movement response through differential petiole growth (hyponastic growth) to outgrow complete submergence. This response is induced by accumulation of the phytohormone ethylene in the plant. Currently, only limited information is available on how this response is molecularly controlled. In this study, we utilized quantitative trait loci (QTL) analysis of natural genetic variation among Arabidopsis accessions to isolate novel factors controlling constitutive petiole angles and ethylene-induced hyponastic growth. Analysis of mutants in various backgrounds and complementation analysis of naturally occurring mutant accessions provided evidence that the leucin-rich repeat receptor-like Ser/Thr kinase gene, ERECTA, controls ethylene-induced hyponastic growth. Moreover, ERECTA controls leaf positioning in the absence of ethylene treatment. Our data demonstrate that this is not due to altered ethylene production or sensitivity.
Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands. m.vanzanten@uu.nl
Martijn
M
van Zanten
L
L
Basten Snoek
Evelien
E
van Eck-Stouten
Marcel C G
MC
Proveniers
Keiko U
KU
Torii
Laurentius A C J
LA
Voesenek
Anton J M
AJ
Peeters
Frank F
FF
Millenaar
D000483:Alleles; D017360:Arabidopsis / Q000187:drug effects / Q000235:genetics / Q000254:growth & development* / Q000378:metabolism*; D029681:Arabidopsis Proteins / Q000235:genetics / Q000502:physiology*; D005030:Ethylenes / Q000494:pharmacology*; D018506:Gene Expression Regulation, Plant / Q000187:drug effects / Q000235:genetics; D008969:Molecular Sequence Data; D010937:Plant Growth Regulators / Q000494:pharmacology*; D030821:Plants, Genetically Modified / Q000187:drug effects / Q000235:genetics / Q000254:growth & development / Q000378:metabolism; D017346:Protein Serine-Threonine Kinases / Q000235:genetics / Q000502:physiology*; D040641:Quantitative Trait Loci / Q000235:genetics; D011956:Receptors, Cell Surface / Q000235:genetics / Q000502:physiology*; D017422:Sequence Analysis, DNA
D029681:Arabidopsis Proteins; D005030:Ethylenes; D010937:Plant Growth Regulators; D011956:Receptors, Cell Surface; C036216:ethylene; C457763:ER protein, Arabidopsis; D017346:Protein Serine-Threonine Kinases