title: Actin microfilaments are involved in the regulation of HVA1 transcript accumulation in drought-treated barley leaves.
abstract: Drought is one of the stresses that limit the yield of barley. Despite extensive studies focused on the issue, the molecular mechanism of the response to drought is still not fully understood. In our previous study, we proposed drought-induced signal perception controlled by actin filaments (AFs). To test this hypothesis, we used a chemical inhibitor of AF polarization-latrunculin B. In drought-treated barley leaves, latrunculin B induced AF depolymerization and altered gene expression (mainly those controlling AF formation), notably inhibiting the expression of HVA1, a dehydrin encoding gene whose function in drought tolerance has been widely studied. These results suggest that AFs might be involved in water-deficit signal perception in plant cells.
authors.affiliation: Department of Plant Physiology, University of Agriculture in Krakow, Podłużna 3, Kraków 30-239, Poland. Electronic address: katarzyna.sniegowska@gmail.com.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Śniegowska-Świerk
authors.affiliation: The Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, Kraków 30-239, Poland. Electronic address: e.dubas@ifr-pan.edu.pl.
authors.forename: Ewa
authors.initials: E
authors.lastname: Dubas
authors.affiliation: Department of Plant Physiology, University of Agriculture in Krakow, Podłużna 3, Kraków 30-239, Poland. Electronic address: rrrapacz@cyf-kr.edu.pl.
authors.forename: Marcin
authors.initials: M
authors.lastname: Rapacz
mesh_terms: D008841:Actin Cytoskeleton / Q000187:drug effects / Q000235:genetics / Q000378:metabolism*; D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000494:pharmacology*; D055864:Droughts; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D001467:Hordeum / Q000187:drug effects / Q000235:genetics / Q000502:physiology*; D018515:Plant Leaves / Q000235:genetics / Q000502:physiology; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism*; D030821:Plants, Genetically Modified; D015398:Signal Transduction; D053778:Thiazolidines / Q000494:pharmacology*
chemical_list: D019086:Bridged Bicyclo Compounds, Heterocyclic; C090398:HVA1 protein, Hordeum vulgare; D010940:Plant Proteins; D053778:Thiazolidines; C037068:latrunculin B
keywords: Actin cytoskeleton; Dehydrin; Drought; Gene expression; Latrunculin B