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- Research Report Pollen embryogenesis
- Fig. 41 Structural characterisation of cross sections of basal inter- nodes of wildtype (R1124) and Stabilstroh (ms135). (A, B)
- Publications Peer Reviewed Papers 2012
- Quantitative Trait Loci (QTLs) underlying these dis- tinct morphological characters. to gain deeper insight into determinants of salt tolerance
- Books and Book Chapters 2013
2013 d öll , S.: Studies on scopolin and scopoletin – stress-induced ac- cumulation and regulatory elements. (Phd thesis) Martin- Luther-universität halle-Wittenberg, naturwissenschaftli- che Fakultät i biowissenschaften, halle/S. (2013) 196 pp. P eukert , M.: Spatiotemporal distributions of metabolites in- volved in barley grain development with emphasis on en- dosperm formation. (Phd thesis) Martin-Luther-universität halle-Wittenberg, naturwissenschaftliche Fakultät i biowis- senschaften, halle/S. (2013) 196 pp. W ang , d.: identifizierung von Metaboliten der Gerste zur charakterisierung der Salzstressabwehr. (bachelor thesis) hochschule anhalt (Fh), köthen (2013) 77 pp. (hochschul- betreuer aus dem iPk: Prof. G. kunze, dr. u. Scholz). F ila , J., a. M atros , S. R adau , R.P. z ahedi , V. Č apková , h.P. M ock & d. h onys : Revealing phosphoproteins playing role in to- bacco pollen activated in vitro. Proteomics 12 (2012) 3229- 3250. J aniak , a., S. P iórko , a. M atros , h.P. M ock , M. k waśniewski , k. c hwialkowska , b. c hmielewska & i. S zarejko : a comparative analysis of proteins that accumulate during the initial stage of root hair development in barley root hair mutants and their parent varieties. J. appl. Genet. 53 (2012) 363-376. M elonek , J., a. M atros , M. t rösch , h.P. M ock & k. k rupinska : the core of chloroplast nucleoids contains architectural SWib do- main proteins. Plant cell 24 (2012) 3060-3073. P eukert , M., a. M atros , G. L attanzio , S. k aspar , J. a badia & h.P. M ock : Spatially resolved analysis of small molecules by matrix- assisted laser desorption/ionization mass spectrometric imaging (MaLdi-MSi). new Phytol. 193 (2012) 806-815. R iewe , d., M. k oohi , J. L isec , M. P feiffer , R. L ippmann , J. S chmeichel , L. W illmitzer & t. a ltmann : a tyrosine aminotransferase involved in tocopherol synthesis in Arabidopsis. Plant J. 71 (2012) 850-859. 2013 b arkla , b.J., t. c astellanos -c ervantes , J.L. d iaz de L eón , a. M atros , h.P. M ock , F. P erez -a lfocea , G.h. S alekdeh , k. W itzel & c. z örb : eluci- dation of salt stress defense and tolerance mechanisms of crop plants using proteomics – current achievements and perspectives. Proteomics 13 (2013) 1885-1900. G utierrez -c arbonell , e., G. L attanzio , R. S agardoy , J. R odríguez -c elma , J.J. R íos R uiz , a. M atros , a. a badía , J. a badía & a.F. L ópez -M illán : changes induced by zinc toxicity in the 2-de protein profile of sugar beet roots. J. Proteomics 94 (2013) 149-161. L attanzio , G., S. a ndaluz , a. M atros , J.J. c alvete , J. k ehr , a. a badía , J. a badía & a.F. L ópez -M illán : Protein profile of Lupinus texensis phloem sap exudates: Searching for Fe- and zn-containing proteins. Proteomics 13 (2013) 2283-2296. M atros , a. & h.P. M ock : Mass spectrometry based imaging tech- niques for spatially resolved analysis of molecules. Front. Plant Sci. 4 (2013) 89. M uthuramalingam , M., a. M atros , R. S cheibe , h.P. M ock & k.J. d ietz : the hydrogen peroxide-sensitive proteome of the chloro- plast in vitro and in vivo. Front. Plant Sci. 4 (2013) 54. P eukert , M., S. W eise , M.S. R öder & i.e. M atthies : development of SnP markers for genes of the phenylpropanoid pathway and their association to kernel and malting traits in barley. bMc Genet. 14 (2013) e97. t rautwein -S chult , a., d. J ankowska , a. c ordes , P. h oferichter , c. k lein , a. M atros , h.P. M ock , k. b aronian , R. b ode & G. k unze : Arxula adeninivorans recombinant urate oxidase and its applica- tion in the production of food with low uric acid content. J. Mol. Microbiol. biotechnol. 23 (2013) 418-430. Abteilung Physiologie und Zellbiologie/ Department of Physiology and Cell Biology 132 z latina , k.: Proteomanalysen des kavernensaftes in Gersten- samen. (bachelor thesis) Martin-Luther-universität halle- Wittenberg, naturwissenschaftliche Fakultät i biowissen- schaften, halle/S. (2013) 45 pp. z wies , c.: untersuchungen zum Phosphoproteinmuster von Gerstenwurzeln bei Salzstress. (bachelor thesis) Martin-Lu- ther-universität halle-Wittenberg, naturwissenschaftliche Fakultät i biowissenschaften, halle/S. (2013) 45 pp. 133 monitoring of cell dynamic processes and the spatial distribu- tion of macromolecules in plants using sophisticated cell bio- logical techniques. Research Report Pollen embryogenesis is a powerful tool to produce haploid and doubled haploid plants. in collaboration with the research groups Plant Reproductive biology (J. kumlehn) and chromosome Structure and Function (a. houben) we continued the search for underlying mechanisms using barley as a model plant (P. Pandey). Since gene expression is influenced by epigenetic modifications we hypothesized that the latter might be a driving force behind induction. by means of immunolabeling we first documented the dynamic epigenetic modifications during pollen gametogenesis, which confirmed active gene expression in the vegetative cell and overall silencing in the generative cell (Pandey 2013). Within 24 h after the start of induction of pollen embryogenesis profound redistributions were observed in the chromatin modifications h3k9ac, h3k4me2, and h3k27me3 which play a profound role in regulating transcriptional activity (Fig. 40). the results suggest an important role for epigenetic modifications in pollen embryogenesis. Since the modifications take place before first pollen mitosis, they are also the earliest indicators for successful pollen induction. Research Group: Structural Cell Biology head: dr. Michael Melzer Scientists IPK financed Rutten, twan, dr. Grant Positions Muszyńska, aleksandra (0,50 industry, since 15.06.2012) Visiting Scientists/Scholars daghma, diaa el-din, dr. (self-financed, 07.10.-12.10.2013) Marzec, Marec (daad, 11,04.-11.05.2012, 01.06.-25.06.2012, 23.10.-08.11.2012, 28.11.-21.12.2012, 02.03.-26.03.2013; self- financed, 15.07.-21.08.2013) kothari, S. L., Prof. (dFG/inSa-Programme, 09.02.-01.03.2012) Pandey, Pooja (daad Siemens Fellowship) Prokhorenko, isabella R., Prof. (self-financed, 11.07.-12.08.2013) tayyab, Muhammad (Scholarship higher education commis- sion Pakistan, 08.11.2012-03.08.2013) Goals as core facility for light and electron microscopy we perform histological and ultrastructural analysis of metabolic and de- velopmental processes in plants. our studies which comprise both own research projects, as well as internal and external co-operations, focus mainly on ultrastructural characterization, Fig. 40 distribution of histone h3k27me3 (histone3 trimethylated at position lysine 27) in pollen of Hordeum vulgare using flourescence immunolabeling in combination with confocal laser scanning microscopy. Shortly after first pollen mitosis florescence signal in gametophytic pollen is restricted to specific domains in both nuclei (A), while after induction of embryogenesis histone h3k27me3 labeling is present throughout the cytoplasm but absent from the nuclei (B). arrows indicate the position of nuclei. cyt, cytoplasm (P. Pandey, t. Rutten, J. kumlehn, a. houben and M. Melzer). Abteilung Physiologie und Zellbiologie/ Department of Physiology and Cell Biology 134 Fig. 41 Structural characterisation of cross sections of basal inter- nodes of wildtype (R1124) and 'Stabilstroh' (ms135). (A, B) Phloroglucinol staining of 150 µm thick vibratome sections of fresh material reveals enhanced lignin content (red) and more pronounced stalk invaginations in ‘Stabilstroh’. (C, D) Scanning electron microscopy images of straw. (E, F) Fluorescence microscopy images of 2 µm thick sections of Spurr's resin embedded tissue stained with basic fuchsine (eX bP 546/12, bS Ft 560, eM bP 575-640). (G-J) transmission electron micros- copy images of sclerenchyma (G, I) and parenchyma (H, J) shows significantly thicker cell walls in ms135. cw, cell wall; ML, middle lamella; Pa, parenchy- ma; Sc, sclerenchyma; Si, stalk invagination; Vb, vascular bun- dle (a. Muszyńska, a. börner, M. Röder and M. Melzer). wildtype (R1124) 'Stabilstroh' (ms135) 135 under investigation by the research group Plant architecture (h. Youssef). SeM analysis of pike development has become an essential aspect for identifying the development and extent of labile features in plant lines under investigation in a common project (daad) with the dept. of Genetics, kato- wice, Poland (i. Szarejko, M. Marzec) we continued working on the structural and molecular characterisation of root epidermal cells for the identification of new genes involved in root hair de- velopment in Hordeum vulgare. using histological and cell biolo- gical methods the system of the cell pattern of barley root epider- mis was investigated. obtained results showed that root hair dif- ferentiation starts with an asymmetric expansion of the daughter cells arising from a symmetric division. a central element appears to be the symplasmic communication between root epidermal cells which becomes restricted during cell specialisation. We ob- served that in mutant lines lacking root hair differentiation this symplasmic isolation does not occur. immunolocalisation studies of the arabinogalactan-protein (aGP) epitopes (LM2, LM14, and Mac207) showed that at least three different classes of aGPs are involved in root hair development in barley. Publications Peer Reviewed Papers 2012 a garwal , R., G. M aralihalli , V. S udarsan , S.d. c houdhury , R.k. V atsa , h. P al , M. M elzer & J.k. S ainis : differential distribution of pig- ment-protein complexes in the thylakoid membranes of Synechocystis 6803. J. bioenerg. biomembr. 44 (2012) 399- 409. a gueci , F., t. R utten , d. d emidov & a. h ouben : Arabidopsis atnek2 kinase is essential and associates with microtubules. Plant Mol. biol. Rep. 30 (2012) 339-348. c eccoli , R.d., n.e. b lanco , M.e. S egretin , M. M elzer , G.t. h anke , R. S cheibe , M.R. h ajirezaei , F.F. b ravo -a lmonacid & n. c arrillo : Fla- vodoxin displays dose-dependent effects on photosynthe- sis and stress tolerance when expressed in transgenic to- bacco plants. Planta 236 (2012) 1447-1458. d aghma , d.S., J. k umlehn , G. h ensel , t. R utten & M. M elzer : time- lapse imaging of the initiation of pollen embryogenesis in barley (Hordeum vulgare L.). J. exp. bot. 63 (2012) 6017-6021. h edtke , b., a. a lawady , a. a lbacete , k. k obayashi , M. M elzer , t. R oitsch , t. M asuda & b. G rimm : deficiency in riboflavin biosynthesis affects tetrapyrrole biosynthesis in etiolated Arabidopsis tis- sue. Plant Mol. biol. 78 (2012) 77-93. h ensel , G., S. o leszczuk , d.e. d aghma , J. z imny , M. M elzer & J. k um - lehn : analysis of t-dna integration and generative segrega- tion in transgenic winter triticale (x triticosecale Wittmack). bMc Plant biol. 12 (2012) 171. J unker , a., G. M önke , t. R utten , J. k eilwagen , M. S eifert , t.M. t hi , J.P. R enou , S. b alzergue , P. V iehover , u. h ähnel , J. L udwig -M üller , L. a ltschmied , u. c onrad , b. W eisshaar & h. b äumlein : elongation- related functions of LeaFY cotYLedon1 during the devel- opment of Arabidopsis thaliana. Plant J. 71 (2012) 427-442. Lodging, the state of permanent displacement of the tillers from their upright position, is a main concern in crop produc- tion as it decreases grain quality and increases the costs of harvesting. Lodging resistance is the most important objec- tive in rye breeding. in a joint project with dieckmann Gmbh & co. kG, Monsanto Saaten Gmbh and the research groups Gene and Genome Mapping (M. Röder), and Resources Genetics and Reproduction (a. börner) we focus on the molecular genetic and histological characterisation of the trait 'Stabilstroh' (a. Muszyńska). this recently identified genotype of rye has the best lodging resistance and simultaneously is characterised by the longest tillers among the German collection of rye hybrids. to identify the genetic traits histological and ultrastructural studies were performed on the basal internodes of segregating F 2 population (‘304/1’) and its parental lines (see Fig. 41, p. 134). ‘Stabilstroh’ was found to have a significantly higher sclerenchy- ma/parenchyma ratio while both sclerenchyma cell walls and inner periclinal cell walls of the epidermis are clearly thickened in comparison to the wildtype. 'Stabilstroh' is also characterised by a high number of pronounced stalk invaginations, an impor- tant factor in enhancing mechanical stability. these parameters affecting mechanical stability of tillers are currently being used to find Quantitative Trait Loci (QTLs) underlying these dis- tinct morphological characters. to gain deeper insight into determinants of salt tolerance we continued our immunological studies of the localisation of horculin in roots of the salt-tolerant line Morex and the salt- sensitive line Steptoe in a joint project of the department of Physiology and cell biology. to improve the understanding of the regulation of biologi- cal processes in plants is a major aspect of numerous internal and external cooperations. together with the research group Molecular Plant nutrition (M.R. hajirezaei) the morphological characterisation of Petunia hybrida shoot tip cuttings ex- posed to various nutrient supplies was continued with a strong emphasis on hormone effect, carbohydrate metabolism and adventitious root formation. in close collaboration with the research group Quantitative Genetics (i. Lermontova) the distribution and dynamics of the CENH3 binding proteins KNL2 and SIM3 were investi- gated in root tip cells of Arabidopsis thaliana. using YFP-tagged constructs and life cell imaging knL2 was found located to centromeres throughout the cell cycle until prophase. during mitosis knL2 circulated in the cytoplasm. after the nuclear membranes reformed, knL2 first reentered the nucleoplasm followed by the centromeres. the distribution of SiM3, which is also involved in cenh3 assembly, resembles that of knL2, ex- cept for the absence of an accumulation at centromeres. both proteins are highly mobile with recovery times after bleaching being about five times less for SiM3 than those for knL2. the six-rowed spike phenotype, which has the potential to significantly increase grain yield in barley, is under the control of at least five different genes. intermediate forms, which show a mixture of both six- and two-rowed phenotype have pointed to the existence of yet another factor, the lab-gene, which is Abteilung Physiologie und Zellbiologie/ Department of Physiology and Cell Biology 136 k oppolu , R., n. a nwar , S. S akuma , a. t agiri , u. L undqvist , M. P our - kheirandish , t. R utten , c. S eiler , a. h immelbach , R. a riyadasa , h.M. Y oussef , n. S tein , n. S reenivasulu , t. k omatsuda & t. S chnurbusch : Six-rowed spike4 (Vrs4) controls spikelet determinacy and row-type in barley. Proc. natl. acad. Sci. u.S.a. 110 (2013) 13198-13203. L ermontova , i., M. k uhlmann , S. F riedel , t. R utten , S. h eckmann , M. S andmann , d. d emidov , V. S chubert & i. S chubert : Arabidopsis ki- netochoRe nuLL 2 is an upstream component for cenh3 deposition at centromeres. Plant cell 25 (2013) 3389-3404. M arzec , M., M. M elzer & i. S zarejko : asymmetric growth of root epidermal cells is related to the differentiation of root hair cells in Hordeum vulgare L., J. exp. bot. 64 (2013) 5145-5155. M arzec , M., a. M uszyńska & d. G ruszka : the role of strigolactones in nutrient-stress responses in plants. int. J. Mol. Sci. 14 (2013) 9286-304. M au , M., J.M. c orral , h. V ogel , M. M elzer , J. F uchs , M. k uhlmann , n. de S torme , d. G eelen & t.F. S harbel : the conserved chimeric transcript UPGRADE-2 is associated with unreduced pollen formation and is exclusively found in apomictic Boechera. Plant Physiol. 163 (2013) 1640-1659 . P andey , P., a. h ouben , J. k umlehn , M. M elzer & t. R utten : chromatin alterations during pollen development in Hordeum vulgare. cytogenet. Genome Res. 141 (2013) 50-57. R ubtsova , M., h. G nad , M. M elzer , J. W eyen & M. G ils : the auxins centrophenoxine and 2,4-d differ in their effects on non- directly induced chromosome doubling in anther culture of wheat (T. aestivum L.). Plant biotechnol. Rep. 7 (2013) 247- 255. z bierzak , a.M., S. P orfirova , t. G riebel , M. M elzer , J.e. P arker & P. d ör - mann : a tiR-nbS protein encoded by Arabidopsis Chilling Sensitive 1 (CHS1) limits chloroplast damage and cell death at low temperature. Plant J. 75 (2013) 539-552. Books and Book Chapters 2013 a garwal , R., a. M atros , M. M elzer & h.P. M ock : blue-native page analysis validates heterogeneity in the thylakoids of Syne- chocystis 6803. in: k uang , t., c. L u & L. z hang (eds.): Photosyn- thesis Research for Food, Fuel and the Future. 15 th int. conf. Photosynthesis. (Series: advanced topics in Science and technology in china). Springer, berlin-heidelberg (2013) 385-388. k asaras , a., M. M elzer & R. k unze : Arabidopsis senescence-associ- ated protein dMP1 is involved in membrane remodeling of the eR and tonoplast. bMc Plant biol. 12 (2012) 54. M eyer , R.c., h. W itucka -W all , M. b echer , a. b lacha , a. b oudichevs - kaia , P. d örmann , o. F iehn , S. F riedel , M. von k orff , J. L isec , M. M elzer , d. R epsilber , R. S chmidt , M. S cholz , J. S elbig , L. W illmitzer & t. a ltmann : heterosis manifestation during early Arabidop- sis seedling development is characterized by intermediate gene expression and enhanced metabolic activity in the hybrids. Plant J. 71 (2012) 669-683. R adchuk , V., J. k umlehn , t. R utten , n. S reenivasulu , R. R adchuk , h. R olletschek , c. h errfurth , i. F eussner & L. b orisjuk : Fertility in barley flowers depends on Jekyll functions in male and fe- male sporophytes. new Phytol. 194 (2012) 142-157. S edzielewska , k.a., e. b öer , c. b ellebna , t. W artmann , R. b ode , M. M elzer , k. b aronian & G. k unze : Role of the AFRD1 encoded fu- marate reductase in hypoxia and osmotolerance in Arxula adeninivorans. FeMS Yeast Res. 12 (2012) 924-937. t hiel , J., J. h ollmann , t. R utten , h. W eber , u. S cholz & W. W eschke : 454 transcriptome sequencing suggests a role for two-compo- nent signalling in cellularization and differentiation of bar- ley endosperm transfer cells. PLoS one 7 (2012) e41867. t hiel , J., d. R iewe , t. R utten , M. M elzer , S. F riedel , F. b ollenbeck , W. W eschke & h. W eber : differentiation of endosperm transfer cells of barley - a comprehensive analysis at the micro-scale. 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