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Plant Molecular Biology

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https://www.readbyqxmd.com/read/28924726/overexpression-of-the-transcription-factor-nf-yc9-confers-abscisic-acid-hypersensitivity-in-arabidopsis
#1
Chao Bi, Yu Ma, Xiao-Fang Wang, Da-Peng Zhang
Nuclear factor Y (NF-Y) family proteins are involved in many developmental processes and responses to environmental cues in plants, but whether and how they regulate phytohormone abscisic acid (ABA) signaling need further studies. In the present study, we showed that over-expression of the NF-YC9 gene confers ABA hypersensitivity in both the early seedling growth and stomatal response, while down-regulation of NF-YC9 does not affect ABA response in these processes. We also showed that over-expression of the NF-YC9 gene confers salt and osmotic hypersensitivity in early seedling growth, which is likely to be directly associated with the ABA hypersensitivity...
September 18, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28918565/forward-genetic-screens-identify-a-role-for-the-mitochondrial-her2-in-e-2-hexenal-responsiveness
#2
Alessandra Scala, Rossana Mirabella, Joachim Goedhart, Michel de Vries, Michel A Haring, Robert C Schuurink
This work adds a new player, HER2, downstream of the perception of E-2-hexenal, a green leaf volatile, and shows that E-2-hexenal specifically changes the redox status of the mitochondria. It is widely accepted that plants produce and respond to green leaf volatiles (GLVs), but the molecular components involved in transducing their perception are largely unknown. The GLV E-2-hexenal inhibits root elongation in seedlings and, using this phenotype, we isolated E-2-hexenal response (her) Arabidopsis thaliana mutants...
September 16, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28918554/genome-wide-identification-classification-evolutionary-analysis-and-gene-expression-patterns-of-the-protein-kinase-gene-family-in-wheat-and-aegilops-tauschii
#3
Jun Yan, Peisen Su, Zhaoran Wei, Eviatar Nevo, Lingrang Kong
In this study we systematically identified and classified PKs in Triticum aestivum, Triticum urartu and Aegilops tauschii. Domain distribution and exon-intron structure analyses of PKs were performed, and we found conserved exon-intron structures within the exon phases in the kinase domain. Collinearity events were determined, and we identified various T. aestivum PKs from polyploidizations and tandem duplication events. Global expression pattern analysis of T. aestivum PKs revealed that some PKs might participate in the signaling pathways of stress response and developmental processes...
September 16, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28889249/papillae-formation-on-trichome-cell-walls-requires-the-function-of-the-mediator-complex-subunit-med25
#4
Christy Fornero, Bangxia Suo, Mais Zahde, Katelyn Juveland, Viktor Kirik
Glassy Hair 1 (GLH1) gene that promotes papillae formation on trichome cell walls was identified as a subunit of the transcriptional mediator complex MED25. The MED25 gene is shown to be expressed in trichomes. The expression of the trichome development marker genes GLABRA2 (GL2) and Ethylene Receptor2 (ETR2) is not affected in the glh1 mutant. Presented data suggest that Arabidopsis MED25 mediator component is likely involved in the transcription of genes promoting papillae deposition in trichomes. The plant cell wall plays an important role in communication, defense, organization and support...
September 9, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28887777/global-rna-association-with-the-transcriptionally-active-chromosome-of-chloroplasts
#5
Marie-Kristin Lehniger, Sabrina Finster, Joanna Melonek, Svenja Oetke, Karin Krupinska, Christian Schmitz-Linneweber
Processed chloroplast RNAs are co-enriched with preparations of the chloroplast transcriptionally active chromosome. Chloroplast genomes are organized as a polyploid DNA-protein structure called the nucleoid. Transcriptionally active chloroplast DNA together with tightly bound protein factors can be purified by gel filtration as a functional entity called the transcriptionally active chromosome (TAC). Previous proteomics analyses of nucleoids and of TACs demonstrated a considerable overlap in protein composition including RNA binding proteins...
September 8, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28887709/mapping-and-comparative-proteomic-analysis-of-the-starch-biosynthetic-pathway-in-rice-by-2d-page-ms
#6
Tao-Shan Chang, Chih-Wei Liu, Yu-Ling Lin, Chao-Yi Li, Arthur Z Wang, Min-Wei Chien, Chang-Sheng Wang, Chien-Chen Lai
Our results not only provide a comprehensive overview of the starch biosynthetic pathway in the developing endosperm but also reveal some important protein markers that regulate the synthesis of starch. In human diets, rice (Oryza sativa L.) is an important source of starch, a substantial amount of which is accumulated in developing endosperm. A better understanding of the complicated pathways involved in starch biosynthesis is needed to improve the yield and quality of rice and other cereal crops through breeding...
September 8, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28884328/the-glycine-soja-nac-transcription-factor-gsnac019-mediates-the-regulation-of-plant-alkaline-tolerance-and-aba-sensitivity
#7
Lei Cao, Yang Yu, Xiaodong Ding, Dan Zhu, Fan Yang, Beidong Liu, Xiaoli Sun, Xiangbo Duan, Kuide Yin, Yanming Zhu
Overexpression of Gshdz4 or GsNAC019 enhanced alkaline tolerance in transgenic Arabidopsis. We proved that Gshdz4 up-regulated both GsNAC019 and GsRD29B but GsNAC019 may repress the GsRD29B expression under alkaline stress. Wild soybean (Glycine soja) has a high tolerance to environmental challenges. It is a model species for dissecting the molecular mechanisms of salt-alkaline stresses. Although many NAC transcription factors play important roles in response to multiple abiotic stresses, such as salt, osmotic and cold, their mode of action in alkaline stress resistance is largely unknown...
September 7, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28884266/microrna-expression-changes-following-synthesis-of-three-full-sib-populus-triploid-populations-with-different-heterozygosities
#8
Yujing Suo, Yu Min, Chunbo Dong, Yi Wang, Shiping Cheng, Xiangyang Kang
Through high-throughput sequencing, we compared the relative expression levels of miRNA in three full-sib Populus triploid populations with that in their parents and one diploid hybrid population. We found similar numbers of miRNAs differentially expressed between the parents and the four progeny hybrid populations. In addition, unbalanced parental expression level dominance of miRNAs were found in the three allotriploid and interspecific hybrid populations, which may reprogram gene expression networks and contribute to the growth of Populus hybrids...
September 7, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28871478/the-iron-chelate-transporter-osysl9-plays-a-role-in-iron-distribution-in-developing-rice-grains
#9
Takeshi Senoura, Emi Sakashita, Takanori Kobayashi, Michiko Takahashi, May Sann Aung, Hiroshi Masuda, Hiromi Nakanishi, Naoko K Nishizawa
Rice OsYSL9 is a novel transporter for Fe(II)-nicotianamine and Fe(III)-deoxymugineic acid that is responsible for internal iron transport, especially from endosperm to embryo in developing seeds. Metal chelators are essential for safe and efficient metal translocation in plants. Graminaceous plants utilize specific ferric iron chelators, mugineic acid family phytosiderophores, to take up sparingly soluble iron from the soil. Yellow Stripe 1-Like (YSL) family transporters are responsible for transport of metal-phytosiderophores and structurally similar metal-nicotianamine complexes...
September 4, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28871377/the-maize-cora-mrs2-mgt-type-mg-transporter-zmmgt10-responses-to-magnesium-deficiency-and-confers-low-magnesium-tolerance-in-transgenic-arabidopsis
#10
Hongyou Li, Ning Wang, Jianzhou Ding, Chan Liu, Hanmei Du, Kaifeng Huang, Moju Cao, Yanli Lu, Shibin Gao, Suzhi Zhang
ZmMGT10 was specifically expressed in maize roots and induced by a deficiency of magnesium. Overexpression of ZmMGT10 restored growth deficiency of the Salmonella typhimurium MM281 strain and enhanced the tolerance in Arabidopsis to stress induced by low magnesium levels by increasing uptake of Mg(2+) via roots. CorA/MRS2/MGT-type Mg(2+) transporters play a significant role in maintaining magnesium (Mg) homeostasis in plants. Although the maize CorA/MRS2/MGT family comprises of 12 members, currently no member has been functionally characterized...
September 4, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28861810/profiling-methyl-jasmonate-responsive-transcriptome-for-understanding-induced-systemic-resistance-in-whitebark-pine-pinus-albicaulis
#11
Jun-Jun Liu, Holly Williams, Xiao Rui Li, Anna W Schoettle, Richard A Sniezko, Michael Murray, Arezoo Zamany, Gary Roke, Hao Chen
RNA-seq analysis on whitebark pine needles demonstrated that methyl jasmonate (MeJA)-triggered transcriptome re-programming substantially overlapped with defense responses against insects and fungal pathogens in Pinus species, increasing current knowledge regarding induced systemic resistance (ISR) to pathogens and pests in whitebark pine. Many whitebark pine populations are in steep decline due to high susceptibility to mountain pine beetle and the non-native white pine blister rust (WPBR). Resistance, including induced systemic resistance (ISR), is not well characterized in whitebark pine, narrowing the current options for increasing the success of restoration and breeding programs...
August 31, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28861701/heat-stress-differentially-modifies-ethylene-biosynthesis-and-signaling-in-pea-floral-and-fruit-tissues
#12
Raghavendra P Savada, Jocelyn A Ozga, Charitha P A Jayasinghege, Kosala D Waduthanthri, Dennis M Reinecke
Ethylene biosynthesis is regulated in reproductive tissues in response to heat stress in a manner to optimize resource allocation to pollinated fruits with developing seeds. High temperatures during reproductive development are particularly detrimental to crop fruit/seed production. Ethylene plays vital roles in plant development and abiotic stress responses; however, little is known about ethylene's role in reproductive tissues during development under heat stress. We assessed ethylene biosynthesis and signaling regulation within the reproductive and associated tissues of pea during the developmental phase that sets the stage for fruit-set and seed development under normal and heat-stress conditions...
August 31, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28856519/osppr6-a-pentatricopeptide-repeat-protein-involved-in-editing-and-splicing-chloroplast-rna-is-required-for-chloroplast-biogenesis-in-rice
#13
Jianpeng Tang, Wenwei Zhang, Kai Wen, Gaoming Chen, Juan Sun, Yunlu Tian, Weijie Tang, Jun Yu, Hongzhou An, Tingting Wu, Fei Kong, William Terzaghi, Chunming Wang, Jianmin Wan
OsPPR6, a pentatricopeptide repeat protein involved in editing and splicing chloroplast RNA, is required for chloroplast biogenesis in rice. The chloroplast has its own genetic material and genetic system, but it is also regulated by nuclear-encoded genes. However, little is known about nuclear-plastid regulatory mechanisms underlying early chloroplast biogenesis in rice. In this study, we isolated and characterized a mutant, osppr6, that showed early chloroplast developmental defects leading to albino leaves and seedling death...
August 30, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28840447/genome-wide-analysis-of-gdsl-type-esterases-lipases-in-arabidopsis
#14
Chia-Ping Lai, Li-Min Huang, Long-Fang O Chen, Ming-Tsair Chan, Jei-Fu Shaw
In this present study, we introduce a fundamental framework and provide information regarding the possible roles of GDSL-type esterase/lipase gene family in Arabidopsis. GDSL-type esterases/lipases are hydrolytic enzymes with multifunctional properties such as broad substrate specificity, regiospecificity, and stereoselectivity. In this study, we identified 105 GDSL-type esterase/lipase genes in Arabidopsis thaliana by conducting a comprehensive computational analysis. Expression studies indicated that GDSL-type lipase proteins showed varied expression patterns...
August 24, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28828699/global-analysis-of-gene-expression-in-maize-leaves-treated-with-low-temperature-ii-combined-effect-of-severe-cold-8%C3%A2-%C3%A2-c-and-circadian-rhythm
#15
M Jończyk, A Sobkowiak, J Trzcinska-Danielewicz, M Skoneczny, D Solecka, J Fronk, P Sowiński
In maize seedlings, severe cold results in dysregulation of circadian pattern of gene expression causing profound modulation of transcription of genes related to photosynthesis and other key biological processes. Plants live highly cyclic life and their response to environmental stresses must allow for underlying biological rhythms. To study the interplay of a stress and a rhythmic cue we investigated transcriptomic response of maize seedlings to low temperature in the context of diurnal gene expression. Severe cold stress had pronounced effect on the circadian rhythm of a substantial proportion of genes...
August 21, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28822035/identification-and-functional-characterization-of-a-p-coumaroyl-coa-2-hydroxylase-involved-in-the-biosynthesis-of-coumarin-skeleton-from-peucedanum-praeruptorum-dunn
#16
Ruolan Yao, Yucheng Zhao, Tingting Liu, Chuanlong Huang, Sheng Xu, Ziwei Sui, Jun Luo, Lingyi Kong
A p-coumaroyl CoA 2'-hydroxylase responsible for the formation of coumarin lactone ring was identified from Peucedanum praeruptorum Dunn and functionally characterized in vitro. Coumarins are important plant secondary metabolites with a variety of biological activities. Ortho-hydroxylation of cinnamates leads to the formation of coumarin lactone ring and is generally thought to be a key step in coumarin biosynthesis. However, ortho-hydroxylases, especially p-coumaroyl CoA 2'-hydroxylase (C2'H) responsible for the biosynthesis of the most common coumarin skeleton, have received insufficient attention...
August 18, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28815457/overexpression-of-a-peroxidase-gene-atprx64-of-arabidopsis-thaliana-in-tobacco-improves-plant-s-tolerance-to-aluminum-stress
#17
Yuanshuang Wu, Zhili Yang, Jingyi How, Huini Xu, Limei Chen, Kunzhi Li
AtPrx64 is one of the peroxidases gene up-regulated in Al stress and has some functions in the formation of plant second cell wall. Its overexpression may improve plant tolerance to Al by some ways. Studies on its function under Al stress may help us to understand the mechanism of plant tolerance to Al stress. In Arabidopsis thaliana, the expressions of some genes (AtPrxs) encoding class III plant peroxidases have been found to be either up-regulated or down-regulated under aluminum (Al) stress. Among 73 genes that encode AtPrxs in Arabidopsis, AtPrx64 is always up-regulated by Al stress, suggesting this gene plays protective roles in response to such stress...
August 16, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28795267/cyp79-p450-monooxygenases-in-gymnosperms-cyp79a118-is-associated-with-the-formation-of-taxiphyllin-in-taxus-baccata
#18
Katrin Luck, Qidong Jia, Meret Huber, Vinzenz Handrick, Gane Ka-Shu Wong, David R Nelson, Feng Chen, Jonathan Gershenzon, Tobias G Köllner
Conifers contain P450 enzymes from the CYP79 family that are involved in cyanogenic glycoside biosynthesis. Cyanogenic glycosides are secondary plant compounds that are widespread in the plant kingdom. Their biosynthesis starts with the conversion of aromatic or aliphatic amino acids into their respective aldoximes, catalysed by N-hydroxylating cytochrome P450 monooxygenases (CYP) of the CYP79 family. While CYP79s are well known in angiosperms, their occurrence in gymnosperms and other plant divisions containing cyanogenic glycoside-producing plants has not been reported so far...
August 9, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28780645/the-mediator-genes-med12-and-med13-control-arabidopsis-root-system-configuration-influencing-sugar-and-auxin-responses
#19
Javier Raya-González, Jesús Salvador López-Bucio, José Carlos Prado-Rodríguez, León Francisco Ruiz-Herrera, Ángel Arturo Guevara-García, José López-Bucio
Arabidopsis med12 and med13 mutants exhibit shoot and root phenotypes related to an altered auxin homeostasis. Sucrose supplementation reactivates both cell division and elongation in primary roots as well as auxin-responsive and stem cell niche gene expression in these mutants. An analysis of primary root growth of WT, med12, aux1-7 and med12 aux1 single and double mutants in response to sucrose and/or N-1-naphthylphthalamic acid (NPA) placed MED12 upstream of auxin transport for the sugar modulation of root growth...
August 5, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28776286/bypassing-mirna-mediated-gene-regulation-under-drought-stress-alternative-splicing-affects-csd1-gene-expression
#20
So-Yon Park, Elizabeth Grabau
The binding site for miR398 in an isoform of Cu/Zn superoxide dismutase (CSD1) is eliminated by alternative splicing to bypass miR398-mediated gene down-regulation under drought stress. MicroRNA (miRNA) binding sites (MBSs) are frequently interrupted by introns and therefore require proper splicing to generate functional MBSs in target transcripts. MBSs can also be excluded during splicing of pre-messenger RNA, leading to different regulation among isoforms. Previous studies have shown that levels of Cu/Zn superoxide dismutase (CSD) are down-regulated by miR398...
August 3, 2017: Plant Molecular Biology
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