The Plant Cell Online最新文献_第2页

Functions of DNA Polymerase ε DNA聚合酶ε的功能

The Plant Cell Online Pub Date : 2009-02-01 DOI: 10.1105/tpc.109.210212

N. Eckardt

引用次数: 1

Glutaredoxin Functions in Floral Development Glutaredoxin在花发育中的作用

The Plant Cell Online Pub Date : 2009-02-01 DOI: 10.1105/tpc.109.210210

Nancy R. Hofmann

引用次数: 5

The Arabidopsis MYB5 Transcription Factor Regulates Mucilage Synthesis, Seed Coat Development, and Trichome Morphogenesis[W][OA] 拟南芥MYB5转录因子对黏液合成、种皮发育和毛状体形态发生的调控[W][OA]

The Plant Cell Online Pub Date : 2009-01-01 DOI: 10.1105/tpc.108.063503

S. Li, Olga Nicolaou Milliken, Hanh M. Pham, Reg Seyit, Ross S Napoli, J. Preston, A. Koltunow, R. Parish

{"title":"The Arabidopsis MYB5 Transcription Factor Regulates Mucilage Synthesis, Seed Coat Development, and Trichome Morphogenesis[W][OA]","authors":"S. Li, Olga Nicolaou Milliken, Hanh M. Pham, Reg Seyit, Ross S Napoli, J. Preston, A. Koltunow, R. Parish","doi":"10.1105/tpc.108.063503","DOIUrl":"https://doi.org/10.1105/tpc.108.063503","url":null,"abstract":"The Arabidopsis thaliana MYB5 gene is expressed in trichomes and seeds, including the seed coat. Constitutive expression of MYB5 resulted in the formation of more small trichomes and ectopic trichomes and a reduction in total leaf trichome numbers and branching. A myb5 mutant displayed minimal changes in trichome morphology, while a myb23 mutant produced increased numbers of small trichomes and two-branched trichomes. A myb5 myb23 double mutant developed more small rosette trichomes and two-branched trichomes than the single mutants. These results indicate that MYB5 and MYB23 regulate trichome extension and branching. The seed coat epidermal cells of myb5 and myb5 myb23 were irregular in shape, developed flattened columellae, and produced less mucilage than those of the wild type. Among the downregulated genes identified in the myb5 seeds using microarray analysis were ABE1 and ABE4 (α/β fold hydrolase/esterase genes), MYBL2, and GLABRA2. The same genes were also downregulated in transparent testa glabra1 (ttg1) seeds, suggesting that MYB5 collaborates with TTG1 in seed coat development. These genes were upregulated in leaves and roots by ectopically expressed MYB5. The MYBL2, ABE1, and ABE4 promoters were active in seeds, including seed coats, and the latter two also in trichomes. Models of the MYB5 regulatory networks involved in seed coat and trichome development are presented.","PeriodicalId":22905,"journal":{"name":"The Plant Cell Online","volume":"15 1","pages":"72 - 89"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78738066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 184

SQUAMOSA Promoter Binding Protein–Like7 Is a Central Regulator for Copper Homeostasis in Arabidopsis[W] SQUAMOSA启动子结合蛋白like7在拟南芥铜稳态调控中的应用[j]

The Plant Cell Online Pub Date : 2009-01-01 DOI: 10.1105/tpc.108.060137

Hiroaki Yamasaki, M. Hayashi, Mitsue Fukazawa, Y. Kobayashi, T. Shikanai

引用次数: 430

Rearrangement of Actin Cytoskeleton Mediates Invasion of Lotus japonicus Roots by Mesorhizobium loti[C][W] 动蛋白骨架重排介导荷花根侵染[C][W]

The Plant Cell Online Pub Date : 2009-01-01 DOI: 10.1105/tpc.108.063693

Keisuke Yokota, E. Fukai, L. Madsen, A. Jurkiewicz, P. Rueda, S. Radutoiu, M. Held, M. Hossain, K. Szczyglowski, Giulia Morieri, G. Oldroyd, J. Downie, M. W. Nielsen, A. Rusek, Shusei Sato, S. Tabata, E. James, H. Oyaizu, N. Sandal, J. Stougaard

{"title":"Rearrangement of Actin Cytoskeleton Mediates Invasion of Lotus japonicus Roots by Mesorhizobium loti[C][W]","authors":"Keisuke Yokota, E. Fukai, L. Madsen, A. Jurkiewicz, P. Rueda, S. Radutoiu, M. Held, M. Hossain, K. Szczyglowski, Giulia Morieri, G. Oldroyd, J. Downie, M. W. Nielsen, A. Rusek, Shusei Sato, S. Tabata, E. James, H. Oyaizu, N. Sandal, J. Stougaard","doi":"10.1105/tpc.108.063693","DOIUrl":"https://doi.org/10.1105/tpc.108.063693","url":null,"abstract":"Infection thread–dependent invasion of legume roots by rhizobia leads to internalization of bacteria into the plant cells, which is one of the salient features of root nodule symbiosis. We found that two genes, Nap1 (for Nck-associated protein 1) and Pir1 (for 121F-specific p53 inducible RNA), involved in actin rearrangements were essential for infection thread formation and colonization of Lotus japonicus roots by its natural microsymbiont, Mesorhizobium loti. nap1 and pir1 mutants developed an excess of uncolonized nodule primordia, indicating that these two genes were not essential for the initiation of nodule organogenesis per se. However, both the formation and subsequent progression of infection threads into the root cortex were significantly impaired in these mutants. We demonstrate that these infection defects were due to disturbed actin cytoskeleton organization. Short root hairs of the mutants had mostly transverse or web-like actin filaments, while bundles of actin filaments in wild-type root hairs were predominantly longitudinal. Corroborating these observations, temporal and spatial differences in actin filament organization between wild-type and mutant root hairs were also observed after Nod factor treatment, while calcium influx and spiking appeared unperturbed. Together with various effects on plant growth and seed formation, the nap1 and pir1 alleles also conferred a characteristic distorted trichome phenotype, suggesting a more general role for Nap1 and Pir1 in processes establishing cell polarity or polar growth in L. japonicus.","PeriodicalId":22905,"journal":{"name":"The Plant Cell Online","volume":"18 1","pages":"267 - 284"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78704352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 160

The Functional Role of Pack-MULEs in Rice Inferred from Purifying Selection and Expression Profile[W] 从水稻的纯化选择和表达谱推断pack - mule在水稻中的功能作用[W]

The Plant Cell Online Pub Date : 2009-01-01 DOI: 10.1105/tpc.108.063206

Kousuke Hanada, Veronica A. Vallejo, K. Nobuta, R. Slotkin, D. Lisch, B. Meyers, Shin-Han Shiu, Ning Jiang

{"title":"The Functional Role of Pack-MULEs in Rice Inferred from Purifying Selection and Expression Profile[W]","authors":"Kousuke Hanada, Veronica A. Vallejo, K. Nobuta, R. Slotkin, D. Lisch, B. Meyers, Shin-Han Shiu, Ning Jiang","doi":"10.1105/tpc.108.063206","DOIUrl":"https://doi.org/10.1105/tpc.108.063206","url":null,"abstract":"Gene duplication is an important mechanism for evolution of new genes. In plants, a special group of transposable elements, called Pack-MULEs or transduplicates, is able to duplicate and amplify genes or gene fragments on a large scale. Despite the abundance of Pack-MULEs, the functionality of these duplicates is not clear. Here, we present a comprehensive analysis of expression and purifying selection on 2809 Pack-MULEs in rice (Oryza sativa), which are derived from 1501 parental genes. At least 22% of the Pack-MULEs are transcribed, and 28 Pack-MULEs have direct evidence of translation. Chimeric Pack-MULEs, which contain gene fragments from multiple genes, are much more frequently expressed than those derived only from a single gene. In addition, Pack-MULEs are frequently associated with small RNAs. The presence of these small RNAs is associated with a reduction in expression of both the Pack-MULEs and their parental genes. Furthermore, an assessment of the selection pressure on the Pack-MULEs using the ratio of nonsynonymous (Ka) and synonymous (Ks) substitution rates indicates that a considerable number of Pack-MULEs likely have been under selective constraint. The Ka/Ks values of Pack-MULE and parental gene pairs are lower among Pack-MULEs that are expressed in sense orientations. Taken together, our analysis suggests that a significant number of Pack-MULEs are expressed and subjected to purifying selection, and some are associated with small RNAs. Therefore, at least a subset of Pack-MULEs are likely functional and have great potential in regulating gene expression as well as providing novel coding capacities.","PeriodicalId":22905,"journal":{"name":"The Plant Cell Online","volume":"149 1","pages":"25 - 38"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86600676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 90

New Role for ACC in Cell Wall Biosynthesis ACC在细胞壁生物合成中的新作用

The Plant Cell Online Pub Date : 2008-11-01 DOI: 10.1105/tpc.108.201111

Nancy R. Hofmann

引用次数: 2

LORELEI: Guiding the Fate of Male Gametes 引导雄性配子的命运

The Plant Cell Online Pub Date : 2008-11-01 DOI: 10.1105/tpc.108.201112

N. Eckardt

引用次数: 0

Will Remodel to Suit: Cellulose Binding Protein Secreted by a Parasitic Nematode Interacts with Arabidopsis Pectin Methylesterase 拟南芥果胶甲基酯酶与寄生线虫分泌的纤维素结合蛋白相互作用

The Plant Cell Online Pub Date : 2008-11-01 DOI: 10.1105/tpc.108.201110

J. Mach

引用次数: 0

A SNARE Complex Unique to Seed Plants Is Required for Protein Storage Vacuole Biogenesis and Seed Development of Arabidopsis thaliana[W][OA] 种子植物特有的SNARE复合物对拟南芥蛋白质储存液泡生物发生和种子发育的影响[W][OA]

The Plant Cell Online Pub Date : 2008-11-01 DOI: 10.1105/tpc.107.057711

Kazuo Ebine, Yusuke Okatani, T. Uemura, T. Goh, Keiko Shoda, Mitsuru Niihama, M. Morita, Christoph Spitzer, M. Otegui, A. Nakano, T. Ueda

{"title":"A SNARE Complex Unique to Seed Plants Is Required for Protein Storage Vacuole Biogenesis and Seed Development of Arabidopsis thaliana[W][OA]","authors":"Kazuo Ebine, Yusuke Okatani, T. Uemura, T. Goh, Keiko Shoda, Mitsuru Niihama, M. Morita, Christoph Spitzer, M. Otegui, A. Nakano, T. Ueda","doi":"10.1105/tpc.107.057711","DOIUrl":"https://doi.org/10.1105/tpc.107.057711","url":null,"abstract":"The SNARE complex is a key regulator of vesicular traffic, executing membrane fusion between transport vesicles or organelles and target membranes. A functional SNARE complex consists of four coiled-coil helical bundles, three of which are supplied by Q-SNAREs and another from an R-SNARE. Arabidopsis thaliana VAMP727 is an R-SNARE, with homologs only in seed plants. We have found that VAMP727 colocalizes with SYP22/ VAM3, a Q-SNARE, on a subpopulation of prevacuolar compartments/endosomes closely associated with the vacuolar membrane. Genetic and biochemical analyses, including examination of a synergistic interaction of vamp727 and syp22 mutations, histological examination of protein localization, and coimmunoprecipitation from Arabidopsis lysates indicate that VAMP727 forms a complex with SYP22, VTI11, and SYP51 and that this complex plays a crucial role in vacuolar transport, seed maturation, and vacuole biogenesis. We suggest that the VAMP727 complex mediates the membrane fusion between the prevacuolar compartment and the vacuole and that this process has evolved as an essential step for seed development.","PeriodicalId":22905,"journal":{"name":"The Plant Cell Online","volume":"77 1","pages":"3006 - 3021"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91194228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 192