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https://www.readbyqxmd.com/read/28108965/transcriptomic-and-hormone-analyses-reveal-mechanisms-underlying-petal-elongation-in-chrysanthemum-morifolium-jinba
#1
Jingjing Wang, Haibin Wang, Lian Ding, Aiping Song, Feng Shen, Jiafu Jiang, Sumei Chen, Fadi Chen
Auxin regulates chrysanthemum petal elongation by promoting cell elongation. Transcriptomic analysis shows that auxin signal transduction may connect with other transcription factors by TCPs to regulate chrysanthemum petal elongation. As an ornamental species, Chrysanthemum morifolium has high ornamental and economic value. Petal size is the primary factor that influences the ornamental value of chrysanthemum, but the mechanism underlying the development of C. morifolium petals remains unclear. In our study, we tracked the growth of petals and found that the basal region of 'Jinba' petals showed a higher elongation rate, exhibiting rapid cell elongation during petal growth...
January 20, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28107453/stress-marker-signatures-in-lesion-mimic-single-and-double-mutants-identify-a-crucial-leaf-age-dependent-salicylic-acid-related-defense-signal
#2
Eve Kaurilind, Mikael Brosché
Plants are exposed to abiotic and biotic stress conditions throughout their lifespans that activates various defense programs. Programmed cell death (PCD) is an extreme defense strategy the plant uses to manage unfavorable environments as well as during developmentally induced senescence. Here we investigated the role of leaf age on the regulation of defense gene expression in Arabidopsis thaliana. Two lesion mimic mutants with misregulated cell death, catalase2 (cat2) and defense no death1 (dnd1) were used together with several double mutants to dissect signaling pathways regulating defense gene expression associated with cell death and leaf age...
2017: PloS One
https://www.readbyqxmd.com/read/28107426/identification-of-micrornas-in-response-to-drought-in-common-wild-rice-oryza-rufipogon-griff-shoots-and-roots
#3
Jing-Wen Zhang, Yan Long, Man-de Xue, Xing-Guo Xiao, Xin-Wu Pei
BACKGROUND: Drought is the most important factor that limits rice production in drought-prone environments. Plant microRNAs (miRNAs) are involved in biotic and abiotic stress responses. Common wild rice (Oryza rufipogon Griff.) contains abundant drought-resistant genes, which provide an opportunity to explore these excellent resources as contributors to improve rice resistance, productivity, and quality. RESULTS: In this study, we constructed four small RNA libraries, called CL and CR from PEG6000-free samples and DL and DR from PEG6000-treated samples, where 'R' indicates the root tissue and 'L' indicates the shoot tissue...
2017: PloS One
https://www.readbyqxmd.com/read/28105955/small-rna-profiles-in-soybean-primary-root-tips-under-water-deficit
#4
Yun Zheng, Vandana Hivrale, Xiaotuo Zhang, Babu Valliyodan, Christine Lelandais-Brière, Andrew D Farmer, Gregory D May, Martin Crespi, Henry T Nguyen, Ramanjulu Sunkar
BACKGROUND: Soybean (Glycine max) production is significantly hampered by frequent droughts in many regions of the world including the United States. Identifying microRNA (miRNA)-controlled posttranscriptional gene regulation under drought will enhance our understanding of molecular basis of drought tolerance in this important cash crop. Indeed, miRNA profiles in soybean exposed to drought were studied but not from the primary root tips, which is not only a main zone of water uptake but also critical for water stress sensing and signaling...
December 5, 2016: BMC Systems Biology
https://www.readbyqxmd.com/read/28102350/manipulation-of-auxin-response-factor-19-affects-seed-size-in-the-woody-perennial-jatropha-curcas
#5
Yanwei Sun, Chunming Wang, Ning Wang, Xiyuan Jiang, Huizhu Mao, Changxiang Zhu, Fujiang Wen, Xianghua Wang, Zhijun Lu, Genhua Yue, Zengfu Xu, Jian Ye
Seed size is a major determinant of seed yield but few is known about the genetics controlling of seed size in plants. Phytohormones cytokinin and brassinosteroid were known to be involved in the regulation of herbaceous plant seed development. Here we identified a homolog of Auxin Response Factor 19 (JcARF19) from a woody plant Jatropha curcas and genetically demonstrated its functions in controlling seed size and seed yield. Through Virus Induced Gene Silencing (VIGS), we found that JcARF19 was a positive upstream modulator in auxin signaling and may control plant organ size in J...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28100961/auxin-extraction-and-purification-based-on-recombinant-aux-iaa-proteins
#6
Yi Su, Weigui Luo, Xiaofei Chen, Huizhen Liu, Yueqing Hu, Wanhuang Lin, Langtao Xiao
BACKGROUND: Indole-3-acetic acid (IAA) extraction and purification are of great importance in auxin research, which is a hot topic in the plant growth and development field. Solid-phase extraction (SPE) is frequently used for IAA extraction and purification. However, no IAA-specific SPE columns are commercially available at the moment. Therefore, the development of IAA-specific recognition materials and IAA extraction and purification methods will help researchers meet the need for more precise analytical methods for research on phytohormones...
2017: Biological Procedures Online
https://www.readbyqxmd.com/read/28096463/deneddylase1-counters-automodification-of-neddylating-enzymes-to-maintain-nedd8-homeostasis-in-arabidopsis
#7
Julia Mergner, Bernhard Kuster, Claus Schwechheimer
In eukaryotes, the conjugation of the ubiquitin-like protein NEDD8 onto protein targets is an important post-translational modification. The best understood neddylation targets are the cullins, scaffold subunits of E3 ubiquitin ligases, where neddylation as well as deneddylation, facilitated by the protease activity of the CSN (COP9 signalosome), are required to control ubiquitin ligase assembly, function and ultimately substrate degradation. Little is known about the role of other deneddylating enzymes besides CSN and the role of neddylation and deneddylation of their substrates...
January 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28096328/dynamic-pin-formed-auxin-efflux-carrier-phosphorylation-at-the-plasma-membrane-controls-auxin-efflux-dependent-growth
#8
Benjamin Weller, Melina Zourelidou, Lena Frank, Inês C R Barbosa, Astrid Fastner, Sandra Richter, Gerd Jürgens, Ulrich Z Hammes, Claus Schwechheimer
The directional distribution of the phytohormone auxin is essential for plant development. Directional auxin transport is mediated by the polarly distributed PIN-FORMED (PIN) auxin efflux carriers. We have previously shown that efficient PIN1-mediated auxin efflux requires activation through phosphorylation at the four serines S1-S4 in Arabidopsis thaliana The Brefeldin A (BFA)-sensitive D6 PROTEIN KINASE (D6PK) and the BFA-insensitive PINOID (PID) phosphorylate and activate PIN1 through phosphorylation at all four phosphosites...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28081213/transcriptome-profiling-to-understand-the-effect-of-citrus-rootstocks-on-the-growth-of-shatangju-mandarin
#9
Xiang-Yu Liu, Juan Li, Meng-Meng Liu, Qing Yao, Jie-Zhong Chen
To obtain insight into potential mechanisms underlying the influence of rootstock on scion growth, we performed a comparative analysis of 'Shatangju' mandarin grafted onto 5 rootstocks: Fragrant orange (Citrus junons Sieb. ex. Tanaka), Red tangerine (Citrus reticulata Blanco), 'Shatangju' mandarin (Citrus reticulata Blanco), Rough lemon (Citrus jambhiri Lush) and Canton lemon (Citrus limonia Osbeck). The tree size of 'Shatangju' mandarin grafted onto Canton lemon and Rough lemon were the largest, followed by self-rooted rootstock trees, and the lowest tree sizes correspond to ones grafted on Red tangerine and Fragrant orange rootstocks...
2017: PloS One
https://www.readbyqxmd.com/read/28074634/arf2-coordinates-with-plethoras-and-pins-to-orchestrate-aba-mediated-root-meristem-activity-in-arabidopsis%C3%A2
#10
Sujittra Promchuea, Yujuan Zhu, Zhizhong Chen, Jing Zhang, Zhizhong Gong
Multiple hormones, including abscisic acid (ABA) and auxin, regulate cell division and differentiation of Arabidopsis root meristems. AUXIN RESPONSE FACTOR 2 (ARF2) functions as a negative regulator of ABA responses, as seed germination and primary root growth of arf2 mutants are hypersensitive to ABA. In this study, we found that ABA treatment reduced the expression levels of the PIN-FORMEDs (PIN) auxin efflux carriers, PIN1, PIN3, PIN4, and PIN7, to a greater extent in the root meristems of arf2-101 mutant than in the wild type...
January 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28073951/nod-factors-potentiate-auxin-signaling-for-transcriptional-regulation-and-lateral-root-formation-in-medicago-truncatula
#11
Violaine Herrbach, Ximena Chirinos, David Rengel, Kokoévi Agbevenou, Rémy Vincent, Stéphanie Pateyron, Stéphanie Huguet, Sandrine Balzergue, Asher Pasha, Nicholas Provart, Clare Gough, Sandra Bensmihen
Nodulation (Nod) factors (NFs) are symbiotic molecules produced by rhizobia that are essential for establishment of the rhizobium-legume endosymbiosis. Purified NFs can stimulate lateral root formation (LRF) in Medicago truncatula, but little is known about the molecular mechanisms involved. Using a combination of reporter constructs, pharmacological and genetic approaches, we show that NFs act on early steps of LRF in M. truncatula, independently of the ethylene signaling pathway and of the cytokinin receptor MtCRE1, but in interaction with auxin...
January 10, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28073698/ectopic-expression-of-an-apple-cytochrome-p450-gene-mdcypm1-negatively-regulates-plant-photomorphogenesis-and-stress-response-in-arabidopsis
#12
Jian-Ping An, Rui Li, Feng-Jia Qu, Chun-Xiang You, Xiao-Fei Wang, Yu-Jin Hao
Cytochrome P450s play an important role in plant growth and are involved in multiple stresses response. However, little is known about the functions of cytochrome P450s in apple. Here, a Malus × domestica cytochrome P450 monooxygenase 1 gene, MdCYPM1, was identified and subsequently cloned from apple 'Gala' (Malus × domestica). To verify the functions of MdCYPM1, we generated transgenic Arabidopsis plants expressing the apple MdCYPM1 gene under the control of the Cauliflower mosaic virus 35S promoter...
January 7, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28071749/tomato-progeny-inherit-resistance-to-the-nematode-meloidogyne-javanica-linked-to-plant-growth-induced-by-the-biocontrol-fungus-trichoderma-atroviride
#13
Hugo Agripino de Medeiros, Jerônimo Vieira de Araújo Filho, Leandro Grassi de Freitas, Pablo Castillo, María Belén Rubio, Rosa Hermosa, Enrique Monte
Root-knot nematodes (RKN) are major crop pathogens worldwide. Trichoderma genus fungi are recognized biocontrol agents and a direct activity of Trichoderma atroviride (Ta) against the RKN Meloidogyne javanica (Mj), in terms of 42% reduction of number of galls (NG), 60% of number of egg masses and 90% of number of adult nematodes inside the roots, has been observed in tomato grown under greenhouse conditions. An in vivo split-root designed experiment served to demonstrate that Ta induces systemic resistance towards Mj, without the need for the organisms to be in direct contact, and significantly reduces NG (20%) and adult nematodes inside tomato roots (87%)...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28069895/brassinosteroid-induced-transcriptional-repression-and-dephosphorylation-dependent-protein-degradation-negatively-regulate-bin2-interacting-aif2-a-br-signaling-negative-regulator-bhlh-transcription-factor
#14
Yoon Kim, Ji-Hye Song, Seon-U Park, You-Seung Jeong, Soo-Hwan Kim
Brassinosteroids (BRs) are plant polyhydroxy-steroids that play important roles in plant growth and development via extensive signal integration through direct interactions between regulatory components of different signaling pathways. Recent studies have shown that diverse helix-loop-helix/basic helix-loop-helix (HLH/bHLH) family proteins are actively involved in control of BR signaling pathways and interact with other signaling pathways. In this study, we show that ATBS1-INTERACTING FACTOR 2 (AIF2), a nuclear-localized atypical bHLH transcription factor, specifically interacts with BRASSINOSTEROID-INSENSITIVE 2 (BIN2) among other BR-signaling molecules...
January 9, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28069545/small-organ-size-1-and-small-organ-size-2-dwarf-and-low-tillering-form-a-complex-to-integrate-auxin-and-brassinosteroid-signaling-in-rice
#15
Ko Hirano, Hideki Yoshida, Koichiro Aya, Mayuko Kawamura, Makoto Hayashi, Tokunori Hobo, Kanna Sato-Izawa, Hidemi Kitano, Miyako Ueguchi-Tanaka, Makoto Matsuoka
Although auxin and brassinosteroid (BR) synergistically control various plant responses, the underlying molecular mechanism of auxin-BR crosstalk is not well understood. We previously identified SMOS1, an auxin-regulated APETALA2-type transcription factor (TF), as the causal gene of the small organ size 1 (smos1) mutant that is characterized by a decreased final size of various organs. In this study we identified another smos mutant, smos2, which shows a phenotype indistinguishable from smos1. SMOS2 was identical to the previously reported DWARF AND LOW-TILLERING (DLT), which encodes a GRAS protein involved in BR signaling...
January 6, 2017: Molecular Plant
https://www.readbyqxmd.com/read/28068913/microrna-157-targeted-spl-genes-regulate-floral-organ-size-and-ovule-production-in-cotton
#16
Nian Liu, Lili Tu, Lichen Wang, Haiyan Hu, Jiao Xu, Xianlong Zhang
BACKGROUND: microRNAs (miRNAs) have been involved in regulation of diverse spectrum of plant development processes in many species. In cotton, few miRNAs have been well characterised in floral organ development. Floral organ, which should be finely tuned, is a crucial factor affecting the yield of cotton. Therefore, it is well worth revealing the function of miRNAs in regulation of floral organ development. Here, we report the role of miRNA156/157 in regulation of floral organ size in cotton...
January 10, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28068433/molecular-and-functional-characterization-of-gr2-r1-event-based-backcross-derived-lines-of-golden-rice-in-the-genetic-background-of-a-mega-rice-variety-swarna
#17
Haritha Bollinedi, Gopala Krishnan S, Kumble Vinod Prabhu, Nagendra Kumar Singh, Sushma Mishra, Jitendra P Khurana, Ashok Kumar Singh
Homozygous Golden Rice lines developed in the background of Swarna through marker assisted backcross breeding (MABB) using transgenic GR2-R1 event as a donor for the provitamin A trait have high levels of provitamin A (up to 20 ppm) but are dwarf with pale green leaves and drastically reduced panicle size, grain number and yield as compared to the recurrent parent, Swarna. In this study, we carried out detailed morphological, biochemical and molecular characterization of these lines in a quest to identify the probable reasons for their abnormal phenotype...
2017: PloS One
https://www.readbyqxmd.com/read/28068426/screening-of-candidate-leaf-morphology-genes-by-integration-of-qtl-mapping-and-rna-sequencing-technologies-in-oilseed-rape-brassica-napus-l
#18
Hongju Jian, Bo Yang, Aoxiang Zhang, Li Zhang, Xinfu Xu, Jiana Li, Liezhao Liu
Leaf size and shape play important roles in agronomic traits, such as yield, quality and stress responses. Wide variations in leaf morphological traits exist in cultivated varieties of many plant species. By now, the genetics of leaf shape and size have not been characterized in Brassica napus. In this study, a population of 172 recombinant inbred lines (RILs) was used for quantitative trait locus (QTL) analysis of leaf morphology traits. Furthermore, fresh young leaves of extreme lines with more leaf lobes (referred to as 'A') and extreme lines with fewer lobes (referred to as 'B') selected from the RIL population and leaves of dissected lines (referred to as 'P') were used for transcriptional analysis...
2017: PloS One
https://www.readbyqxmd.com/read/28065834/nanosecond-pulsed-electric-fields-trigger-cell-differentiation-in-chlamydomonas-reinhardtii
#19
Fan Bai, Christian Gusbeth, Wolfgang Frey, Peter Nick
Nanosecond pulsed electric fields (nsPEFs) have great potential for biotechnological and medical applications. However, the biological mechanisms causing the cellular responses are still far from understood. We used the unicellular green algae Chlamydomonas reinhardtii as experimental model to dissect the immediate consequences of electroporation from the developmental cellular responses evoked by nsPEFs. We observe that nsPEFs induce a short-term permeabilization of the membrane, accompanied by swelling and oxidative burst...
January 5, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28064248/mir393-mediated-auxin-signaling-regulation-is-involved-in-root-elongation-inhibition-in-response-to-toxic-aluminum-stress-in-barley
#20
Bin Bai, Hongwu Bian, Zhanghui Zeng, Ning Hou, Bo Shi, Junhui Wang, Muyuan Zhu, Ning Han
High-throughput small RNA sequencing has identified several potential aluminum (Al)-responsive microRNAs (miRNAs); however, their regulatory role remains unknown. Here, we identified two miR393 family members in barley, and confirmed two target genes-HvTIR1 and HvAFB-through a modified form of 5'-RACE (rapid amplification of cDNA ends) as well as degradome data analysis. Furthermore, we investigated the biological function of the miR393/target module in root development and its Al stress response. The investigation showed that miR393 affected root growth and adventitious root number by altering auxin sensitivity...
January 7, 2017: Plant & Cell Physiology
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