共查询到20条相似文献,搜索用时 979 毫秒
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The mutation nrpb1‐A325V in the largest subunit of RNA polymerase II suppresses compromised growth of Arabidopsis plants deficient in a function of the general transcription factor IIF 下载免费PDF全文
Elena Babiychuk Khai Trinh Hoang Klaas Vandepoele Eveline Van De Slijke Danny Geelen Geert De Jaeger Junichi Obokata Sergei Kushnir 《The Plant journal : for cell and molecular biology》2017,89(4):730-745
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MtVRN2 is a Polycomb VRN2‐like gene which represses the transition to flowering in the model legume Medicago truncatula 下载免费PDF全文
Mauren Jaudal Lulu Zhang Chong Che Daniel G. Hurley Geoffrey Thomson Jiangqi Wen Kirankumar S. Mysore Joanna Putterill 《The Plant journal : for cell and molecular biology》2016,86(2):145-160
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Antagonistic control of flowering time by functionally specialized poly(A) polymerases in Arabidopsis thaliana 下载免费PDF全文
Hjördis Czesnick Michael Lenhard 《The Plant journal : for cell and molecular biology》2016,88(4):570-583
Polyadenylation is a critical 3′‐end processing step during maturation of pre‐mRNAs, and the length of the poly(A) tail affects mRNA stability, nuclear export and translation efficiency. The Arabidopsis thaliana genome encodes three canonical nuclear poly(A) polymerase (PAPS) isoforms fulfilling specialized functions, as reflected by their different mutant phenotypes. While PAPS1 affects several processes, such as the immune response, organ growth and male gametophyte development, the roles of PAPS2 and PAPS4 are largely unknown. Here we demonstrate that PAPS2 and PAPS4 promote flowering in a partially redundant manner. The enzymes act antagonistically to PAPS1, which delays the transition to flowering. The opposite flowering‐time phenotypes in paps1 and paps2 paps4 mutants are at least partly due to decreased or increased FLC activity, respectively. In contrast to paps2 paps4 mutants, plants with increased PAPS4 activity flower earlier than the wild‐type, concomitant with reduced FLC expression. Double mutant analyses suggest that PAPS2 and PAPS4 act independently of the autonomous pathway components FCA, FY and CstF64. The direct polyadenylation targets of the three PAPS isoforms that mediate their effects on flowering time do not include FLC sense mRNA and remain to be identified. Thus, our results uncover a role for canonical PAPS isoforms in flowering‐time control, raising the possibility that modulating the balance of the isoform activities could be used to fine tune the transition to flowering. 相似文献
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An early flowering mutant of Arabidopsis, elf32-D was isolated from activation tagging screening. The mutant flowered earlier than wild type under both long day and short
day conditions. The mutant phenotype was caused by overexpression of a Kunitz-type trypsin inhibitor gene (AtKTI1). The expression of AtKTI1 was detected in leaves, flowers, siliques and roots. In the vegetative state, no change of flowering integrator gene expression
was observed for AtKTI1 overexpressing plants. In contrast, at the reproductive stage, its overexpression resulted in the
down-regulation of FLC, a strong floral repressor which integrates the autonomous and vernalization pathways and also the up-regulation of FT and AP1, which are downstream floral integrator genes. It is probable that the AtKTI1 overexpression inhibits components of the flowering
signaling pathway upstream of FLC, eventually regulating expression of FLC, or causing perturbations in plant metabolism and thus indirectly affecting flowering. 相似文献
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Histone acetyltransferase GCN5 is essential for heat stress‐responsive gene activation and thermotolerance in Arabidopsis 下载免费PDF全文
Zhaorong Hu Na Song Mei Zheng Xinye Liu Zhenshan Liu Jiewen Xing Junhua Ma Weiwei Guo Yingyin Yao Huiru Peng Mingming Xin Dao‐Xiu Zhou Zhongfu Ni Qixin Sun 《The Plant journal : for cell and molecular biology》2015,84(6):1178-1191
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Yukiko Yasui 《Bioscience, biotechnology, and biochemistry》2013,77(11):1850-1855
Floral transition is regulated by environmental and endogenous signals. Previously, we identified VASCULAR PLANT ONE-ZINC FINGER1 (VOZ1) and VOZ2 as phytochrome B-interacting factors. VOZ1 and VOZ2 redundantly promote flowering and have pivotal roles in the downregulation of FLOWERING LOCUS C (FLC), a central repressor of flowering in Arabidopsis. Here, we showed that the late-flowering phenotypes of the voz1 voz2 mutant were suppressed by vernalization in the Columbia and FRIGIDA (FRI)-containing accessions, which indicates that the late-flowering phenotype of voz1 voz2 mutants was caused by upregulation of FLC. We also showed that the other FLC clade members, MADS AFFECTING FLOWERING (MAF) genes, were also a downstream target of VOZ1 and VOZ2 as their expression levels were also increased in the voz1 voz2 mutant. Our results suggest that the FLC clade genes integrate signals from VOZ1/VOZ2 and vernalization to regulate flowering. 相似文献
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Ming Luo Ready Tai Chun‐Wei Yu Songguang Yang Chia‐Yang Chen Wen‐Dar Lin Wolfgang Schmidt Keqiang Wu 《The Plant journal : for cell and molecular biology》2015,82(6):925-936
The acetylation level of histones on lysine residues regulated by histone acetyltransferases and histone deacetylases plays an important but under‐studied role in the control of gene expression in plants. With the aim of characterizing the Arabidopsis RPD3/HDA1 family histone deacetylase HDA5, we present evidence showing that HDA5 displays deacetylase activity. Mutants defective in the expression of HDA5 displayed a late‐flowering phenotype. Expression of the flowering repressor genes FLC and MAF1 was up‐regulated in hda5 mutants. Furthermore, the gene activation markers, histone H3 acetylation and H3K4 trimethylation on FLC and MAF1 chromatin were increased in hda5‐1 mutants. Chromatin immunoprecipitation analysis showed that HDA5 binds to the chromatin of FLC and MAF1. Bimolecular fluorescence complementation assays and co‐immunoprecipitation assays showed that HDA5 interacts with FVE, FLD and HDA6, indicating that these proteins are present in a protein complex involved in the regulation of flowering time. Comparing gene expression profiles of hda5 and hda6 mutants by RNA‐seq revealed that HDA5 and HDA6 co‐regulate gene expression in multiple development processes and pathways. 相似文献