PubAg

Main content area

Search

9  Search Results

1 - 9 of 9
Number of results to display per page

Search Results

1. ABI3 and PIL5 Collaboratively Activate the Expression of SOMNUS by Directly Binding to Its Promoter in Imbibed Arabidopsis Seeds

Author:
Park, Jeongmoo; Lee, Nayoung; Kim, Woohyun; Lim, Soohwan; Choi, Giltsu
Source:
The plant cell 2011 v.23 no.4 pp. 1404-1415
ISSN:
1040-4651
Subject:
Arabidopsis; abscisic acid; chromatin; gene overexpression; messenger RNA; mutants; phytochrome; reporter genes; seed germination; seeds; zinc finger motif
Abstract:
... A previous study showed that SOMNUS (SOM), which encodes a C3H-type zinc finger protein, is a key negative regulator of seed germination that acts downstream of PHYTOCHROME INTERACTING FACTOR3-LIKE5 (PIL5). However, it was not determined if PIL5 is the sole regulator of SOM expression. Public microarray data suggest that the expression of SOM mRNA is regulated also by ABSCISIC ACID INSENSITIVE3 (A ...
DOI:
10.1105/tpc.110.080721
PubMed:
21467583
PubMed Central:
PMC3101561

2. A Conserved, Mg²⁺-Dependent Exonuclease Degrades Organelle DNA during Arabidopsis Pollen Development

Author:
Matsushima, Ryo; Tang, Lay Yin; Zhang, Lingang; Yamada, Hiroshi; Twell, David; Sakamoto, Wataru
Source:
The plant cell 2011 v.23 no.4 pp. 1608-1624
ISSN:
1040-4651
Subject:
Arabidopsis thaliana; DNA; bacteria; fluorescent dyes; gametophytes; mitochondria; mutants; phenotype; plastids; pollen; proteins
Abstract:
... In plant cells, mitochondria and plastids contain their own genomes derived from the ancestral bacteria endosymbiont. Despite their limited genetic capacity, these multicopy organelle genomes account for a substantial fraction of total cellular DNA, raising the question of whether organelle DNA quantity is controlled spatially or temporally. In this study, we genetically dissected the organelle DN ...
DOI:
10.1105/tpc.111.084012
PubMed:
21521697
PubMed Central:
PMC3101548

3. β-Amylase-Like Proteins Function as Transcription Factors in Arabidopsis, Controlling Shoot Growth and Development

Author:
Reinhold, Heike; Soyk, Sebastian; Šimková, Klára; Hostettler, Carmen; Marafino, John; Mainiero, Samantha; Vaughan, Cara K.; Monroe, Jonathan D.; Zeeman, Samuel C.
Source:
The plant cell 2011 v.23 no.4 pp. 1391-1403
ISSN:
1040-4651
Subject:
Arabidopsis thaliana; transcription factors; transcriptional activation; growth and development; enzymes; recombinant proteins; models; starch; gene expression; diurnal variation; genes; mutants; DNA-binding domains; leaf development; shoots
Abstract:
... Plants contain β-amylase-like proteins (BAMs; enzymes usually associated with starch breakdown) present in the nucleus rather than targeted to the chloroplast. They possess BRASSINAZOLE RESISTANT1 (BZR1)-type DNA binding domains--also found in transcription factors mediating brassinosteroid (BR) responses. The two Arabidopsis thaliana BZR1-BAM proteins (BAM7 and BAM8) bind a cis-regulatory element ...
DOI:
10.1105/tpc.110.081950
PubMed:
21487098
PubMed Central:
PMC3101533

4. Arabidopsis ABERRANT PEROXISOME MORPHOLOGY9 Is a Peroxin That Recruits the PEX1-PEX6 Complex to Peroxisomes

Author:
Goto, Shino; Mano, Shoji; Nakamori, Chihiro; Nishimura, Mikio
Source:
The plant cell 2011 v.23 no.4 pp. 1573-1587
ISSN:
1040-4651
Subject:
Arabidopsis thaliana; amino acids; cytosol; fatty acids; genes; mammals; mutants; peroxisomes; plant growth; protein transport; protein-protein interactions; proteins; yeasts
Abstract:
... Peroxisomes have pivotal roles in several metabolic processes, such as the detoxification of H₂O₂ and β-oxidation of fatty acids, and their functions are tightly regulated by multiple factors involved in peroxisome biogenesis, including protein transport. This study describes the isolation of an embryonic lethal Arabidopsis thaliana mutant, aberrant peroxisome morphology9 (apem9), which is comprom ...
DOI:
10.1105/tpc.110.080770
PubMed:
21487094
PubMed Central:
PMC3101541

5. D-myo-Inositol-3-Phosphate Affects Phosphatidylinositol-Mediated Endomembrane Function in Arabidopsis and Is Essential for Auxin-Regulated Embryogenesis

Author:
Luo, Yu; Qin, Genji; Zhang, Jun; Liang, Yuan; Song, Yingqi; Zhao, Meiping; Tsuge, Tomohiko; Aoyama, Takashi; Liu, Jingjing; Gu, Hongya; Qu, Li-Jia
Source:
The plant cell 2011 v.23 no.4 pp. 1352-1372
ISSN:
1040-4651
Subject:
Arabidopsis thaliana; auxins; biochemical pathways; cells; cotyledons; embryogenesis; genes; mutants; myo-inositol; phenotype; proteins; signal transduction; yeasts
Abstract:
... In animal cells, myo-inositol is an important regulatory molecule in several physiological and biochemical processes, including signal transduction and membrane biogenesis. However, the fundamental biological functions of myo-inositol are still far from clear in plants. Here, we report the genetic characterization of three Arabidopsis thaliana genes encoding D-myo-inositol-3-phosphate synthase (MI ...
DOI:
10.1105/tpc.111.083337
PubMed:
21505066
PubMed Central:
PMC3101546

6. ETOILE Regulates Developmental Patterning in the Filamentous Brown Alga Ectocarpus siliculosus

Author:
Le Bail, Aude; Billoud, Bernard; Le Panse, Sophie; Chenivesse, Sabine; Charrier, Bénédicte
Source:
The plant cell 2011 v.23 no.4 pp. 1666-1678
ISSN:
1040-4651
Subject:
embryophytes; transmembrane proteins; morphometry; loci; phenotype; microarray technology; extracellular matrix; branching; Phaeophyceae; models; Animalia; mutants; cell differentiation; cell communication
Abstract:
... Brown algae are multicellular marine organisms evolutionarily distant from both metazoans and land plants. The molecular or cellular mechanisms that govern the developmental patterning in brown algae are poorly characterized. Here, we report the first morphogenetic mutant, étoile (etl), produced in the brown algal model Ectocarpus siliculosus. Genetic, cellular, and morphometric analyses showed th ...
DOI:
10.1105/tpc.110.081919
PubMed:
21478443
PubMed Central:
PMC3101566

7. GUN4-Porphyrin Complexes Bind the ChlH/GUN5 Subunit of Mg-Chelatase and Promote Chlorophyll Biosynthesis in Arabidopsis

Author:
Adhikari, Neil D.; Froehlich, John E.; Strand, Deserah D.; Buck, Stephanie M.; Kramer, David M.; Larkin, Robert M.
Source:
The plant cell 2011 v.23 no.4 pp. 1449-1467
ISSN:
1040-4651
Subject:
Arabidopsis thaliana; alleles; biosynthesis; chlorophyll; chloroplasts; enzymes; light intensity; mutants; proteins; protoporphyrin; reactive oxygen species; transgenic plants
Abstract:
... The GENOMES UNCOUPLED4 (GUN4) protein stimulates chlorophyll biosynthesis by activating Mg-chelatase, the enzyme that commits protoporphyrin IX to chlorophyll biosynthesis. This stimulation depends on GUN4 binding the ChlH subunit of Mg-chelatase and the porphyrin substrate and product of Mg-chelatase. After binding porphyrins, GUN4 associates more stably with chloroplast membranes and was propose ...
DOI:
10.1105/tpc.110.082503
PubMed:
21467578
PubMed Central:
PMC3101535

8. Phosphorylation of a WRKY Transcription Factor by Two Pathogen-Responsive MAPKs Drives Phytoalexin Biosynthesis in Arabidopsis

Author:
Mao, Guohong; Meng, Xiangzong; Liu, Yidong; Zheng, Zuyu; Chen, Zhixiang; Zhang, Shuqun
Source:
The plant cell 2011 v.23 no.4 pp. 1639-1653
ISSN:
1040-4651
Subject:
Arabidopsis thaliana; transcription factors; biosynthesis; Botrytis cinerea; gene activation; mutation; genes; mutants; phosphorylation; chromatin; anti-infective agents; mitogen-activated protein kinase; pathogens
Abstract:
... Plant sensing of invading pathogens triggers massive metabolic reprogramming, including the induction of secondary antimicrobial compounds known as phytoalexins. We recently reported that MPK3 and MPK6, two pathogen-responsive mitogen-activated protein kinases, play essential roles in the induction of camalexin, the major phytoalexin in Arabidopsis thaliana. In search of the transcription factors ...
DOI:
10.1105/tpc.111.084996
PubMed:
21498677
PubMed Central:
PMC3101563

9. The 21-Nucleotide, but Not 22-Nucleotide, Viral Secondary Small Interfering RNAs Direct Potent Antiviral Defense by Two Cooperative Argonautes in Arabidopsis thaliana

Author:
Wang, Xian-Bing; Jovel, Juan; Udomporn, Petchthai; Wang, Ying; Wu, Qingfa; Li, Wan-Xiang; Gasciolli, Virginie; Vaucheret, Herve; Ding, Shou-Wei
Source:
The plant cell 2011 v.23 no.4 pp. 1625-1638
ISSN:
1040-4651
Subject:
Arabidopsis thaliana; Cucumber mosaic virus; DNA-directed RNA polymerase; RNA interference; mutants; small interfering RNA; suppressor genes; viruses
Abstract:
... Arabidopsis thaliana defense against distinct positive-strand RNA viruses requires production of virus-derived secondary small interfering RNAs (siRNAs) by multiple RNA-dependent RNA polymerases. However, little is known about the biogenesis pathway and effector mechanism of viral secondary siRNAs. Here, we describe a mutant of Cucumber mosaic virus (CMV-Δ2b) that is silenced predominantly by the ...
DOI:
10.1105/tpc.110.082305
PubMed:
21467580
PubMed Central:
PMC3101545