title: QTLs for cell wall-bound phenolics in relation to the photosynthetic apparatus activity and leaf water status under drought stress at different growth stages of triticale.
abstract: The present study aimed at identifying the regions of triticale genome responsible for cell wall saturation with phenolic compounds under drought stress during vegetative and generative growth. Moreover, the loci determining the activity of the photosynthetic apparatus, leaf water content (LWC) and osmotic potential (Ψo) were identified, as leaf hydration and functioning of the photosynthetic apparatus under drought are associated with the content of cell wall-bound phenolics (CWPh). Compared with LWC and Ψo, CWPh fluctuations were more strongly associated with changes in chlorophyll fluorescence. At the vegetative stage, CWPh fluctuations were due to the activity of three loci, of which only QCWPh.4B was also related to changes in Fv/Fmand ABS/CSm. In the other QTLs (QCWPh.6R.2 and QCWPh.6R.3), the genes of these loci determined also the changes in majority of chlorophyll fluorescence parameters. At the generative stage, the changes in CWPh in loci QCWPh.4B, QCWPh.3R and QCWPh.6R.1 corresponded to those in DIo/CSm. The locus QCWPh.6R.3, active at V stage, controlled majority of chlorophyll fluorescence parameters. This is the first study on mapping quantitative traits in triticale plants exposed to drought at different stages of development, and the first to present the loci for cell wall-bound phenolics.
authors.affiliation: Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, Niezapominajek 21, 30-239, Kraków, Poland. t.hura@ifr-pan.edu.pl.
authors.forename: Tomasz
authors.initials: T
authors.lastname: Hura
authors.affiliation: Department of Biochemistry and Biotechnology, Rzeszów University of Technology, Albigowa 472, 37-122, Albigowa, Poland.
authors.forename: Mirosław
authors.initials: M
authors.lastname: Tyrka
authors.affiliation: Department of Plant Physiology, Faculty of Agriculture and Economics, Agricultural University, Podłużna 3, 30-239, Kraków, Poland.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Hura
authors.affiliation: Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, Niezapominajek 21, 30-239, Kraków, Poland.
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Ostrowska
authors.affiliation: Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, Niezapominajek 21, 30-239, Kraków, Poland.
authors.forename: Kinga
authors.initials: K
authors.lastname: Dziurka
mesh_terms: D002473:Cell Wall / Q000378:metabolism; D002734:Chlorophyll / Q000235:genetics; D002874:Chromosome Mapping; D055864:Droughts; D017343:Genes, Plant; D008040:Genetic Linkage; D018745:Genome, Plant; D057230:Limit of Detection; D009995:Osmosis; D010636:Phenols / Q000737:chemistry*; D010641:Phenotype; D010788:Photosynthesis; D018515:Plant Leaves / Q000737:chemistry / Q000235:genetics*; D040641:Quantitative Trait Loci; D000066889:Triticale / Q000235:genetics*; D014867:Water
chemical_list: D010636:Phenols; D014867:Water; D002734:Chlorophyll
keywords: Cell wall-bound phenolics; Leaf water content; Osmotic potential; Photosynthetic apparatus activity; QTLs; Triticale