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"plant hormone"

Ling Yin, Junjie Qu, Shuhan Deng, Shaoli Liu, Jiang Lu, Yali Zhang
Downy mildew (DM) resistance is a highly desirable agronomic trait in grape breeding. High variation in Plasmopara viticola resistance was found in Vitis cultivars. Some accessions show high P. viticola resistance even under conditions highly conducive to DM. Here, leaf disc inoculation experiments revealed that Vitis amurensis 'Zuoshaner' exhibited DM resistance with necrotic spots, whereas the V. amurensis × V. vinifera hybrid cultivar 'Zuoyouhong' was susceptible. Changes in plant hormones accumulation profiles, differed between the cultivars...
July 20, 2017: Genome Génome / Conseil National de Recherches Canada
Katsuhiro Shiono, Riho Hashizaki, Toyofumi Nakanishi, Tatsuko Sakai, Takushi Yamamoto, Koretsugu Ogata, Ken-Ichi Harada, Hajime Ohtani, Hajime Katano, Shu Taira
Plant hormones are important mobile endogenous signaling molecules that regulate responses to abiotic stress as well as plant growth and development. Visual information on more than one plant hormone from the same sample would be especially powerful, because it could enable rapid, intuitive interpretation. However, multi-imaging techniques for plant hormones have been unavailable. Here, we report the first multi-imaging of two plant hormones, one of cytokinin (i.e. trans-zeatin) and abscisic acid (ABA) by MALDI-TOF-MS imaging...
July 18, 2017: Journal of Agricultural and Food Chemistry
Xiaoqin Zhang, Hua Jiang, Hua Wang, Jun Cui, Jiahui Wang, Jiang Hu, Longbiao Guo, Qian Qian, Dawei Xue
Rice is one of the most important food crops in the world, and its growth, development, yield, and grain quality are susceptible to a deficiency of the macronutrient potassium (K(+)). The molecular mechanism for K(+) deficiency tolerance remains poorly understood. In this study, K(+) deficient conditions were employed to investigate the resulting changes in the transcriptome of rice seedling roots. Using ribonucleic acid sequencing (RNA-Seq) and analysis, a total of 805 differentially expressed genes were obtained, of which 536 genes were upregulated and 269 were downregulated...
July 17, 2017: Scientific Reports
Lindani Moyo, Shunmugiah V Ramesh, Madhu Kappagantu, Neena Mitter, Vidyasagar Sathuvalli, Hanu R Pappu
BACKGROUND: Potato virus Y (PVY) is one of the most economically important pathogen of potato that is present as biologically distinct strains. The virus-derived small interfering RNAs (vsiRNAs) from potato cv. Russet Burbank individually infected with PVY-N, PVY-NTN and PVY-O strains were recently characterized. Plant defense RNA-silencing mechanisms deployed against viruses produce vsiRNAs to degrade homologous viral transcripts. Based on sequence complementarity, the vsiRNAs can potentially degrade host RNA transcripts raising the prospect of vsiRNAs as pathogenicity determinants in virus-host interactions...
July 17, 2017: Virology Journal
Likai Wang, Fan Zhang, Siddharth Rode, Kevin K Chin, Eun Esther Ko, Jonghwan Kim, Vishwanath R Iyer, Hong Qiao
BACKGROUND: Histone acetylation and deacetylation are essential for gene regulation and have been implicated in the regulation of plant hormone responses. Many studies have indicated the role of histone acetylation in ethylene signaling; however, few studies have investigated how ethylene signaling regulates the genomic landscape of chromatin states. Recently, we found that ethylene can specifically elevate histone H3K14 acetylation and the non-canonical histone H3K23 acetylation in etiolated seedlings and the gene activation is positively associated with the elevation of H3K14Ac and H3K23Ac in response to ethylene...
July 17, 2017: BMC Genomics
Feifei Wang, Lijuan Wang, Longfei Qiao, Jiacai Chen, Maria Belen Pappa, Haixia Pei, Tao Zhang, Caren Chang, Chun-Hai Dong
The plant hormone ethylene plays various functions in plant growth, development and response to environmental stress. Ethylene is perceived by membrane-bound ethylene receptors, and among the homologous receptors in Arabidopsis, the ETR1 ethylene receptor plays a major role. The present study provides evidence demonstrating that Arabidopsis CPR5 functions as a novel ETR1 receptor-interacting protein in regulating ethylene response and signaling. Yeast split ubiquitin assays and bi-fluorescence complementation studies in plant cells indicated that CPR5 directly interacts with the ETR1 receptor...
July 14, 2017: Journal of Integrative Plant Biology
Vanesa B Tognetti, Agnieszka Bielach, Mónika Hrtyan
To maintain the activity of meristems is an absolute requirement for plant growth and development, and the role of the plant hormones auxin and cytokinin in apical meristem function is well established. Only little attention has been given, however, to the function of the reactive oxygen species (ROS) gradient along meristematic tissues and its interplay with hormonal regulatory networks. The interdependency between auxin-, cytokinin-, and ROS-related circuits controls primary growth and development while modulating plant morphology in response to detrimental environmental factors...
July 14, 2017: Plant, Cell & Environment
Guillaume Née, Katharina Kramer, Kazumi Nakabayashi, Bingjian Yuan, Yong Xiang, Emma Miatton, Iris Finkemeier, Wim J J Soppe
The time of seed germination is a major decision point in the life of plants determining future growth and development. This timing is controlled by seed dormancy, which prevents germination under favourable conditions. The plant hormone abscisic acid (ABA) and the protein DELAY OF GERMINATION 1 (DOG1) are essential regulators of dormancy. The function of ABA in dormancy is rather well understood, but the role of DOG1 is still unknown. Here, we describe four phosphatases that interact with DOG1 in seeds. Two of them belong to clade A of type 2C protein phosphatases: ABA-HYPERSENSITIVE GERMINATION 1 (AHG1) and AHG3...
July 13, 2017: Nature Communications
Fangjun Li, Maoying Li, Ping Wang, Kevin L Cox, Liusheng Duan, Jane K Dever, Libo Shan, Zhaohu Li, Ping He
Drought is a key limiting factor for cotton (Gossypium spp.) production, as more than half of the global cotton supply is grown in regions with high water shortage. However, the underlying mechanism of the response of cotton to drought stress remains elusive. By combining genome-wide transcriptome profiling and a loss-of-function screen using virus-induced gene silencing, we identified Gossypium hirsutum GhWRKY59 as an important transcription factor that regulates the drought stress response in cotton. Biochemical and genetic analyses revealed a drought stress-activated mitogen-activated protein (MAP) kinase cascade consisting of GhMAP3K15-Mitogen-activated Protein Kinase Kinase 4 (GhMKK4)-Mitogen-activated Protein Kinase 6 (GhMPK6) that directly phosphorylates GhWRKY59 at residue serine 221...
July 12, 2017: New Phytologist
Ricardo Tejos, Cecilia Rodriguez-Furlan, Maciej Adamowski, Michael Sauer, Lorena Norambuena, Jiří Friml
Coordinated cell polarization in developing tissues is a recurrent theme in multicellular organisms. In plants, a directional distribution of the plant hormone auxin is at the core of many developmental programs. A feedback regulation of auxin on the polarized localization of PIN auxin transporters in individual cells has been proposed as a self-organizing mechanism for coordinated tissue polarization, but the molecular mechanisms linking auxin signalling to PIN-dependent auxin transport remain unknown. We performed a microarray-based approach to find regulators of the auxin-induced PIN relocation in the Arabidopsis thaliana root...
July 7, 2017: Journal of Cell Science
Kentaro Ezura, Kim Ji-Seong, Kazuki Mori, Yutaka Suzuki, Satoru Kuhara, Tohru Ariizumi, Hiroshi Ezura
Fruit set involves the developmental transition of an unfertilized quiescent ovary in the pistil into a fruit. While fruit set is known to involve the activation of signals (including various plant hormones) in the ovary, many biological aspects of this process remain elusive. To further expand our understanding of this process, we identified genes that are specifically expressed in tomato (Solanum lycopersicum L.) pistils during fruit set through comprehensive RNA-seq-based transcriptome analysis using 17 different tissues including pistils at six different developmental stages...
2017: PloS One
Kehua Wang, Yanrong Liu, Jinli Tian, Kunyong Huang, Tianran Shi, Xiaoxia Dai, Wanjun Zhang
Perennial ryegrass (Lolium perenne) is one of the most widely used forage and turf grasses in the world due to its desirable agronomic qualities. However, as a cool-season perennial grass species, high temperature is a major factor limiting its performance in warmer and transition regions. In this study, a de novo transcriptome was generated using a cDNA library constructed from perennial ryegrass leaves subjected to short-term heat stress treatment. Then the expression profiling and identification of perennial ryegrass heat response genes by digital gene expression analyses was performed...
2017: Frontiers in Plant Science
Pramod Kumar, Pooja Kesari, Sonali Dhindwal, Ashish K Choudhary, Madhusudhanarao Katiki, Neetu, Aparna Verma, Kiran Ambatipudi, Shailly Tomar, Ashwani Kumar Sharma, Girish Mishra, Pravindra Kumar
Auxin levels are tightly regulated within the plant cell, and its storage in the isolated cavity of proteins is a measure adopted by cells to maintain the availability of auxin. We report the first crystal structure of Wrightia tinctoria 11S globulin (WTG) in complex with Indole-3-acetic acid (IAA), an auxin, at 1.7 Å resolution. WTG hexamers assemble as a result of the stacking interaction between the hydrophobic surfaces of two trimers, leaving space for the binding of charged ligands. The bound auxin is stabilized by non-covalent interactions, contributed by four chains in each cavity...
July 5, 2017: Scientific Reports
Xiaoyu Yang, Lei Chen, Junxian He, Weichang Yu
Targeted mutations in five carotenoid catabolism genes failed to boost carotenoid accumulation in rice seeds, but produced dwarf and high tillering mutants when OsCCD7 gene was knocked out. Carotenoids play an important role in human diet as a source of vitamin A. Rice is a major staple food in Asia, but does not accumulate carotenoids in the endosperm because of the low carotenoid biosynthesis or the degradation in metabolism. In this study, the CRISPR/Cas9 system was investigated in the targeted knockout of five rice carotenoid catabolic genes (OsCYP97A4, OsDSM2, OsCCD4a, OsCCD4b and OsCCD7) and in an effort to increase β-carotene accumulation in rice endosperm...
July 4, 2017: Plant Cell Reports
Songlin Hu, Cuiling Wang, Darlene L Sanchez, Alexander E Lipka, Peng Liu, Yanhai Yin, Michael Blanco, Thomas Lübberstedt
Brassinosteroids (BRs) and Gibberellins (GAs) are two classes of plant hormones affecting plant height (PHT). Thus, manipulation of BR and GA levels or signaling enables optimization of crop grain and biomass yields. We established backcross (BC) families, selected for increased PHT, in two elite maize inbred backgrounds. Various exotic accessions used in the germplasm enhancement in maize project served as donors. BC1-derived doubled haploid lines in the same two elite maize inbred backgrounds established without selection for plant height were included for comparison...
2017: Frontiers in Plant Science
Kosuke Fukui, Daichi Yamagami, Shinsaku Ito, Tadao Asami
Strigolactones are a class of plant hormones that inhibit axillary bud outgrowth and are released from plant roots to act as a rhizosphere communication signal. The Orobanchaceae parasitic plant Striga hermonthica perceives strigolactone as its germination signal, indicating host presence. After germination, the Striga plant parasitises the host plant and suppresses host growth by draining photosynthetic products, water and other essential nutrients. Because of this way of life, this parasite threatens crop production in sub-Saharan Africa with infestation in crop fields and crop devastation...
2017: Frontiers in Plant Science
Yan O Zubo, Ivory Clabaugh Blakley, Maria V Yamburenko, Jennifer M Worthen, Ian H Street, José M Franco-Zorrilla, Wenjing Zhang, Kristine Hill, Tracy Raines, Roberto Solano, Joseph J Kieber, Ann E Loraine, G Eric Schaller
The plant hormone cytokinin affects a diverse array of growth and development processes and responses to the environment. How a signaling molecule mediates such a diverse array of outputs and how these response pathways are integrated with other inputs remain fundamental questions in plant biology. To this end, we characterized the transcriptional network initiated by the type-B ARABIDOPSIS RESPONSE REGULATORs (ARRs) that mediate the cytokinin primary response, making use of chromatin immunoprecipitation sequencing (ChIP-seq), protein-binding microarrays, and transcriptomic approaches...
July 3, 2017: Proceedings of the National Academy of Sciences of the United States of America
Elizabeth Vaca, Claire Behrens, Tiju Theccanat, Jun-Yong Choe, John V Dean
Salicylic acid (SA) is a plant hormone involved in a number of physiological responses including both local and systemic resistance of plants to pathogens. In Arabidopsis, SA is glucosylated to form either SA 2-O-β-D-glucose (SAG) or SA glucose ester (SGE). In the present study, we show that SAG accumulates in the vacuole of Arabidopsis, while the majority of SGE was located outside the vacuole. The uptake of SAG by vacuolar membrane-enriched vesicles isolated from Arabidopsis was stimulated by the addition of MgATP and was inhibited by both vanadate (ABC transporter inhibitor) and bafilomycin A1 (vacuolar H(+) -ATPase inhibitor), suggesting that SAG uptake involves both an ABC transporter and H(+) -antiporter...
June 30, 2017: Physiologia Plantarum
Václav Mik, Zuzana Mičková, Karel Doležal, Ivo Frébort, Tomáš Pospíšil
Discadenine (1), a self-spore germination inhibitor from the cellular slim mold Dictyostelium discoideum, is structurally related to the plant hormone cytokinin. This compound was synthesized from l-aspartic acid, and its activities were confirmed by three classical cytokinin bioassays as well as by using binding and activation assays with the Arabidopsis cytokinin receptors AHK3 and CRE1/AHK4.
June 30, 2017: Journal of Natural Products
Jinglan Liu, Haitao Du, Xu Ding, Yaodong Zhou, Pengfei Xie, Jincai Wu
BACKGROUND: Callose is a type of plant cell wall polysaccharide and is controlled by β-1, 3-glucanase and synthase. Abscisic acid (ABA) is an important plant hormone. Exogenous ABA induces the promotion of rice resistance to pests, and whether exogenous ABA could decline the loss of rice yield after brown planthopper (Nilaparvata lugens Stål; BPH) feeding is also the most important practical problems, whereas the mechanisms involved in rice resistance induced by ABA remain obscure...
June 29, 2017: Pest Management Science
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