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Plant Molecular Biology

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https://www.readbyqxmd.com/read/28324206/indeterminate-domain-protein-binding-sequences-in-the-5-untranslated-region-and-promoter-of-the-scarecrow-gene-play-crucial-and-distinct-roles-in-regulating-scarecrow-expression-in-roots-and-leaves
#1
Atsushi Kobayashi, Satoshi Miura, Akiko Kozaki
SCARECROW (SCR) and SHORT-ROOT (SHR), which belong to the GRAS transcription factor family, are key regulators of root and leaf growth and development. Despite the importance of SCR expression for proper plant development, the mechanism of SCR regulation has not been clarified. A previous study showed that an INDETERMINATE DOMAIN transcription factor, JACKDAW (JKD), is essential for the expression of SCR in combination with SCR and SHR. In this study, we characterized possible binding sequences of INDETERMINATE DOMAIN PROTEIN in the 1...
March 21, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28321650/the-small-auxin-up-rna-ossaur45-affects-auxin-synthesis-and-transport-in-rice
#2
Yan-Xia Xu, Meng-Zhu Xiao, Yan Liu, Jun-Liang Fu, Yi He, De-An Jiang
This research is the first to demonstrate that OsSAUR45 is involved in plant growth though affecting auxin synthesis and transport by repressing OsYUCCA and OsPIN gene expression in rice. Small auxin-up RNAs (SAURs) comprise a large multigene family and are rapidly activated as part of the primary auxin response in plants. However, little is known about the role of SAURs in plant growth and development, especially in monocots. Here, we report the biological function of OsSAUR45 in the model plant rice (Oryza sativa)...
March 20, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28315989/rnai-inhibition-of-feruloyl-coa-6-hydroxylase-reduces-scopoletin-biosynthesis-and-post-harvest-physiological-deterioration-in-cassava-manihot-esculenta-crantz-storage-roots
#3
Shi Liu, Ima M Zainuddin, Herve Vanderschuren, James Doughty, John R Beeching
Cassava (Manihot esculenta Crantz) is a major world crop, whose storage roots provide food for over 800 million throughout the humid tropics. Despite many advantages as a crop, the development of cassava is seriously constrained by the rapid post-harvest physiological deterioration (PPD) of its roots that occurs within 24-72 h of harvest, rendering the roots unpalatable and unmarketable. PPD limits cassava's marketing possibilities in countries that are undergoing increased development and urbanisation due to growing distances between farms and consumers...
March 18, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28299506/identification-of-the-ligand-of-pru-p-3-a-peach-ltp
#4
Nuria Cubells-Baeza, Cristina Gómez-Casado, Leticia Tordesillas, Carmen Ramírez-Castillejo, María Garrido-Arandia, Pablo González-Melendi, María Herrero, Luis F Pacios, Araceli Díaz-Perales
Pru p 3, a peach LTP, is located in pollinated flower styles and secreting downy hairs, transporting a derivative of camptothecin bound to phytosphingosine. Pru p 3 may inhibit a second pollination and may keep away herbivores until seed maturation. The allergen Pru p 3, a peach lipid transfer protein, has been well studied. However, its physiological function remains to be elucidated. Our results showed that Pru p 3 usually carries a lipid ligand that play an essential role in its function in plants. Using ESI-qToF, we observed that the ligand was a derivative of camptothecin binding to phytosphingosine, wich that is inserted into the hydrophobic tunnel of the protein...
March 15, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28286910/the-molecular-mechanism-underlying-anthocyanin-metabolism-in-apple-using-the-mdmyb16-and-mdbhlh33-genes
#5
Haifeng Xu, Nan Wang, Jingxuan Liu, Changzhi Qu, Yicheng Wang, Shenghui Jiang, Ninglin Lu, Deyun Wang, Zongying Zhang, Xuesen Chen
MdMYB16 forms homodimers and directly inhibits anthocyanin synthesis via its C-terminal EAR repressor. It weakened the inhibitory effect of MdMYB16 on anthocyanin synthesis when overexpressing MdbHLH33 in callus overexpressing MdMYB16. MdMYB16 could interact with MdbHLH33. Anthocyanins are strong antioxidants that play a key role in the prevention of cardiovascular disease, cancer, and diabetes. The germplasm of Malus sieversii f. neidzwetzkyana is important for the study of anthocyanin metabolism. To date, only limited studies have examined the negative regulatory mechanisms underlying anthocyanin synthesis in apple...
March 12, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28285416/a-naturally-occurring-conditional-albino-mutant-in-rice-caused-by-defects-in-the-plastid-localized-osabci8-transporter
#6
Xiuyu Zeng, Ran Tang, Herong Guo, Shanwen Ke, Bin Teng, Yu-Hung Hung, Zhenjiang Xu, Xin-Ming Xie, Tzung-Fu Hsieh, Xiang-Qian Zhang
A wide range of molecules are transported across membranes by the ATP binding cassette (ABC) transporters. Plants possess a collection of ABC proteins bearing similarities to the components of prokaryotic multi subunit ABC transporters, designed as ABC group I. However the functions of most of them are not well understood. Here, we characterized a naturally occurring rice mutant that exhibited albino phenotype under continuous rainy days in the field, but gradually recovered to normal green after the rainy season...
March 11, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28283922/identification-of-alternatively-spliced-transcripts-of-rice-phytochelatin-synthase-2-gene-ospcs2-involved-in-mitigation-of-cadmium-and-arsenic-stresses
#7
Natasha Das, Surajit Bhattacharya, Somnath Bhattacharyya, Mrinal K Maiti
The OsPCS2 exhibits root- and shoot-specific differential ratios of alternatively spliced transcripts in indica rice under Cd stress, and plays role in Cd and As stress tolerance and accumulation. Enzymatic activity of phytochelatin synthase (PCS) in plant produces phytochelatins, which help in sequestration of heavy metal(loid)s inside the cell vacuole to alleviate toxicity. Here we report that among the two PCS genes-OsPCS1 and OsPCS2 in indica rice (Oryza sativa) cultivar, the OsPCS2 produces an alternatively spliced OsPCS2b transcript that bears the unusual premature termination codon besides the canonically spliced OsPCS2a transcript...
March 11, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28283921/new-insights-into-the-operative-network-of-faeo-an-enone-oxidoreductase-from-fragaria-x-ananassa-duch
#8
Gabriella Collu, Domenica Farci, Francesca Esposito, Francesca Pintus, Joanna Kirkpatrick, Dario Piano
The 2-methylene-furan-3-one reductase or Fragaria x ananassa Enone Oxidoreductase (FaEO) catalyses the last reductive step in the biosynthesis of 4-hydroxy-2,5-dimethyl-3(2H)-furanone, a major component in the characteristic flavour of strawberries. In the present work, we describe the association between FaEO and the vacuolar membrane of strawberry fruits. Even if FaEO lacks epitopes for stable or transient membrane-interactions, it contains a calmodulin-binding region, suggesting that in vivo FaEO may be associated with the membrane via a peripheral protein complex with calmodulin...
March 11, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28260138/nadph-protochlorophyllide-oxidoreductase-b-porb-action-in-arabidopsis-thaliana-revisited-through-transgenic-expression-of-engineered-barley-porb-mutant-proteins
#9
Frank Buhr, Abderrahim Lahroussi, Armin Springer, Sachin Rustgi, Diter von Wettstein, Christiane Reinbothe, Steffen Reinbothe
NADPH:protochlorophyllide oxidoreductase (POR) is a key enzyme for the light-induced greening of etiolated angiosperm plants. It belongs to the 'RED' family of reductases, epimerases and dehydrogenases. All POR proteins characterized so far contain evolutionarily conserved cysteine residues implicated in protochlorophyllide (Pchlide)-binding and catalysis. cDNAs were constructed by site-directed mutagenesis that encode PORB mutant proteins with defined Cys→Ala exchanges. These cDNAs were expressed in transgenic plants of a PORB-deficient knock-out mutant (porB) of Arabidopsis thaliana...
March 4, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28258553/cassava-c-repeat-binding-factor-1-gene-responds-to-low-temperature-and-enhances-cold-tolerance-when-overexpressed-in-arabidopsis-and-cassava
#10
Dong An, Qiuxiang Ma, Hongxia Wang, Jun Yang, Wenzhi Zhou, Peng Zhang
Cassava MeCBF1 is a typical CBF transcription factor mediating cold responses but its low expression in apical buds along with a retarded response cause inefficient upregulation of downstream cold-related genes, rendering cassava chilling-sensitive. Low temperature is a major abiotic stress factor affecting survival, productivity and geographic distribution of important crops worldwide. The C-repeat/dehydration-responsive element binding transcription factors (CBF/DREB) are important regulators of abiotic stress response in plants...
March 4, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28258552/isolation-and-functional-characterization-of-a-methyl-jasmonate-responsive-3-carene-synthase-from-lavandula-x-intermedia
#11
Ayelign M Adal, Lukman S Sarker, Ashley D Lemke, Soheil S Mahmoud
A methyl jasmonate responsive 3-carene synthase (Li3CARS) gene was isolated from Lavandula x intermedia and functionally characterized in vitro. Lavenders produce essential oils consisting mainly of monoterpenes, including the potent antimicrobial and insecticidal monoterpene 3-carene. In this study we isolated and functionally characterized a leaf-specific, methyl jasmonate (MeJA)-responsive monoterpene synthase (Li3CARS) from Lavandula x intermedia. The ORF excluding transit peptides encoded a 64.9 kDa protein that was expressed in E...
March 3, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28258551/crispr-cas9-mediated-targeted-mutagenesis-in-upland-cotton-gossypium-hirsutum-l
#12
Madhusudhana R Janga, LeAnne M Campbell, Keerti S Rathore
The clustered, regularly interspaced, short palindromic repeats (CRISPR)/CRISPR associated (Cas)9 protein system has emerged as a simple and efficient tool for genome editing in eukaryotic cells. It has been shown to be functional in several crop species, yet there are no reports on the application of this or any other genome editing technologies in the cotton plant. Cotton is an important crop that is grown mainly for its fiber, but its seed also serves as a useful source of edible oil and feed protein. Most of the commercially-grown cotton is tetraploid, thus making it much more difficult to target both sets of homeologous alleles...
March 3, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28247243/grape-hexokinases-are-involved-in-the-expression-regulation-of-sucrose-synthase-and-cell-wall-invertase-encoding-genes-by-glucose-and-aba
#13
Xiu-Qin Wang, Li-Li Zheng, Hao Lin, Fei Yu, Li-Hui Sun, Li-Mei Li
Hexokinase (HXK, EC 2.7.1.1) is a multifunctional protein that both is involved in catalyzing the first step of glycolysis and plays an important role in sugar signaling. However, the supporting genetic evidence on hexokinases (CsHXKs) from grape (Vitis vinifera L. cv. Cabernet Sauvignon) berries has been lacking. Here, to investigate the role of CsHXK isoforms as glucose (Glc) and abscisic acid (ABA) sensors, we cloned two hexokinase isozymes, CsHXK1 and CsHXK2 with highly conserved genomic structure of nine exons and eight introns...
February 28, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28243841/genome-wide-analysis-of-expansin-superfamily-in-wild-arachis-discloses-a-stress-responsive-expansin-like-b-gene
#14
Larissa Arrais Guimaraes, Ana Paula Zotta Mota, Ana Claudia Guerra Araujo, Lucio Flavio de Alencar Figueiredo, Bruna Medeiros Pereira, Mario Alfredo de Passos Saraiva, Raquel Bispo Silva, Etienne G J Danchin, Patricia Messenberg Guimaraes, Ana Cristina Miranda Brasileiro
Expansins are plant cell wall-loosening proteins involved in adaptive responses to environmental stimuli and various developmental processes. The first genome-wide analysis of the expansin superfamily in the Arachis genus identified 40 members in A. duranensis and 44 in A. ipaënsis, the wild progenitors of cultivated peanut (A. hypogaea). These expansins were further characterized regarding their subfamily classification, distribution along the genomes, duplication events, molecular structure, and phylogeny...
February 27, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28229269/in-arabidopsis-thaliana-distinct-alleles-encoding-mitochondrial-rna-processing-factor-4-support-the-generation-of-additional-5-termini-of-ccmb-transcripts
#15
Katrin Stoll, Christian Jonietz, Sarah Schleicher, Catherine Colas des Francs-Small, Ian Small, Stefan Binder
In plant mitochondria, the 5' ends of many transcripts are generated post-transcriptionally. We show that the pentatricopeptide repeat (PPR) protein RNA PROCESSING FACTOR 4 (RPF4) supports the generation of extra 5' ends of ccmB transcripts in Landsberg erecta (Ler) and a number of other Arabidopsis thaliana ecotypes. RPF4 was identified in Ler applying a forward genetic approach supported by complementation studies of ecotype Columbia (Col), which generates the Ler-type extra ccmB 5' termini only after the introduction of the RPF4 allele from Ler...
February 22, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28190131/association-genetics-of-phenolic-needle-compounds-in-norway-spruce-with-variable-susceptibility-to-needle-bladder-rust
#16
Andrea Ganthaler, Wolfgang Stöggl, Stefan Mayr, Ilse Kranner, Silvio Schüler, Elisabeth Wischnitzki, Eva Maria Sehr, Silvia Fluch, Carlos Trujillo-Moya
Accumulation of phenolic needle metabolites in Norway spruce is regulated by many genes with small and additive effects and is correlated with the susceptibility against fungal attack. Norway spruce accumulates high foliar concentrations of secondary phenolic metabolites, with important functions for pathogen defence responses. However, the molecular genetic basis underlying the quantitative variation of phenolic compounds and their role in enhanced resistance of spruce to infection by needle bladder rust are unknown...
February 11, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28161858/wheat-drought-responsive-wxpl-transcription-factors-regulate-cuticle-biosynthesis-genes
#17
Huihui Bi, Sukanya Luang, Yuan Li, Natalia Bazanova, Nikolai Borisjuk, Maria Hrmova, Sergiy Lopato
The cuticle forms a hydrophobic waxy layer that covers plant organs and provides protection from biotic and abiotic stresses. Transcription of genes responsible for cuticle formation is regulated by several types of transcription factors (TFs). Five orthologous to WAX PRODUCTION (WXP1 and WXP2) genes from Medicago truncatula were isolated from a cDNA library prepared from flag leaves and spikes of drought tolerant wheat (Triticum aestivum, breeding line RAC875) and designated TaWXP-like (TaWXPL) genes. Tissue-specific and drought-responsive expression of TaWXPL1D and TaWXPL2B was investigated by quantitative RT-PCR in two Australian wheat genotypes, RAC875 and Kukri, with contrasting glaucousness and drought tolerance...
February 4, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28160166/depletion-of-abscisic-acid-levels-in-roots-of-flooded-carrizo-citrange-poncirus-trifoliata-l-raf-%C3%A3-citrus-sinensis-l-osb-plants-is-a-stress-specific-response-associated-to-the-differential-expression-of-pyr-pyl-rcar-receptors
#18
Vicent Arbona, Sara I Zandalinas, Matías Manzi, Miguel González-Guzmán, Pedro L Rodriguez, Aurelio Gómez-Cadenas
Soil flooding reduces root abscisic acid (ABA) levels in citrus, conversely to what happens under drought. Despite this reduction, microarray analyses suggested the existence of a residual ABA signaling in roots of flooded Carrizo citrange seedlings. The comparison of ABA metabolism and signaling in roots of flooded and water stressed plants of Carrizo citrange revealed that the hormone depletion was linked to the upregulation of CsAOG, involved in ABA glycosyl ester (ABAGE) synthesis, and to a moderate induction of catabolism (CsCYP707A, an ABA 8'-hydroxylase) and buildup of dehydrophaseic acid (DPA)...
February 3, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28155188/inducible-expression-of-bs2-r-gene-from-capsicum-chacoense-in-sweet-orange-citrus-sinensis-l-osbeck-confers-enhanced-resistance-to-citrus-canker-disease
#19
Lorena Noelia Sendín, Ingrid Georgina Orce, Rocío Liliana Gómez, Ramón Enrique, Carlos Froilán Grellet Bournonville, Aldo Sergio Noguera, Adrián Alberto Vojnov, María Rosa Marano, Atilio Pedro Castagnaro, María Paula Filippone
Transgenic expression of the pepper Bs2 gene confers resistance to Xanthomonas campestris pv. vesicatoria (Xcv) pathogenic strains which contain the avrBs2 avirulence gene in susceptible pepper and tomato varieties. The avrBs2 gene is highly conserved among members of the Xanthomonas genus, and the avrBs2 of Xcv shares 96% homology with the avrBs2 of Xanthomonas citri subsp. citri (Xcc), the causal agent of citrus canker disease. A previous study showed that the transient expression of pepper Bs2 in lemon leaves reduced canker formation and induced plant defence mechanisms...
February 2, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28150126/opposite-roles-of-the-arabidopsis-cytokinin-receptors-ahk2-and-ahk3-in-the-expression-of-plastid-genes-and-genes-for-the-plastid-transcriptional-machinery-during-senescence
#20
Maria N Danilova, Natalia V Kudryakova, Anastasia S Doroshenko, Dmitry A Zabrodin, Zulfira F Rakhmankulova, Ralf Oelmüller, Victor V Kusnetsov
Cytokinin membrane receptors of the Arabidopsis thaliana AHK2 and AHK3 play opposite roles in the expression of plastid genes and genes for the plastid transcriptional machinery during leaf senescence Loss-of-function mutants of Arabidopsis thaliana were used to study the role of cytokinin receptors in the expression of chloroplast genes during leaf senescence. Accumulation of transcripts of several plastid-encoded genes is dependent on the АНК2/АНК3 receptor combination. АНК2 is particularly important at the final stage of plant development and, unlike АНК3, a positive regulator of leaf senescence...
February 1, 2017: Plant Molecular Biology
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