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"plant signal"

Kaberi Gautam, Timothy D Schwinghamer, Donald L Smith
Microbe-to-plant signals can enhance the growth of a wide range of crops. The responses by soybean (Glycine max var. 91M01) to two signal molecules were investigated: Bradyrhizobium japonicum 532C lipo-chitooligosaccharide (Nod Bj V [C:18, MeFuc]) (LCO); and Bacillus thuringiensis strain NEB17 bacteriocin thuricin 17 (Th17). The objective was to assess and quantify the response by soybean, in terms of factors that contribute to yield, to the experimental signal molecules in germination experiments and field experiments...
October 4, 2016: Plant Signaling & Behavior
Nancy R Gough
This Editorial Guide describes emerging areas of signaling research for plants. Advances in this area are key to preserving nature and maintaining the planet's health while feeding a growing human population.
2016: Science Signaling
Thomas A DeFalco, Wolfgang Moeder, Keiko Yoshioka
Recent work has expanded our understanding of the roles of cyclic nucleotide-gated channels (CNGCs) in plant signaling. In this spotlight article, we discuss advances and future perspectives in determining how CNGCs mediate calcium signaling in response to diverse stimuli.
September 9, 2016: Trends in Plant Science
Shuso Takeda, Taichi Himeno, Kazuhiro Kakizoe, Hiroyuki Okazaki, Tomoko Okada, Kazuhito Watanabe, Hironori Aramaki
The physiological activities of cannabidiolic acid (CBDA), a component of fiber-type cannabis plants, have been demonstrated and include its function as a protector against external invasion by inducing cannabinoid-mediated necrosis (Shoyama et al., Plant Signal Behav 3:1111-1112, 2008). The biological activities of CBDA have been attracting increasing attention. We previously identified CBDA as an inhibitor of the migration of MDA-MB-231 cells, a widely used human breast cancer cell line in cancer biology, due to its highly aggressive nature...
August 16, 2016: Journal of Natural Medicines
Kimberley C Snowden, Dirk Inzé
No abstract text is available yet for this article.
October 2016: Current Opinion in Plant Biology
Amy L Schaefer, Yasuhiro Oda, Bruna Goncalves Coutinho, Dale A Pelletier, Justin Weiburg, Vittorio Venturi, E Peter Greenberg, Caroline S Harwood
UNLABELLED: Homologs of the LuxR acyl-homoserine lactone (AHL) quorum-sensing signal receptor are prevalent in Proteobacteria isolated from roots of the Eastern cottonwood tree, Populus deltoides Many of these isolates possess an orphan LuxR homolog, closely related to OryR from the rice pathogen Xanthomonas oryzae OryR does not respond to AHL signals but, instead, responds to an unknown plant compound. We discovered an OryR homolog, PipR, in the cottonwood endophyte Pseudomonas sp. strain GM79...
2016: MBio
Julian G B Northey, Siyu Liang, Muhammad Jamshed, Srijani Deb, Eloise Foo, James B Reid, Peter McCourt, Marcus A Samuel
Protein farnesylation is a post-translational modification involving the addition of a 15-carbon farnesyl isoprenoid to the carboxy terminus of select proteins(1-3). Although the roles of this lipid modification are clear in both fungal and animal signalling, many of the mechanistic functions of farnesylation in plant signalling are still unknown. Here, we show that CYP85A2, the cytochrome P450 enzyme that performs the last step in brassinosteroid biosynthesis (conversion of castasterone to brassinolide)(4), must be farnesylated to function in Arabidopsis...
2016: Nature Plants
Jun Li, Patrick X Zhao
Identification of functional modules/sub-networks in large-scale biological networks is one of the important research challenges in current bioinformatics and systems biology. Approaches have been developed to identify functional modules in single-class biological networks; however, methods for systematically and interactively mining multiple classes of heterogeneous biological networks are lacking. In this paper, we present a novel algorithm (called mPageRank) that utilizes the Multiplex PageRank approach to mine functional modules from two classes of biological networks...
2016: Frontiers in Plant Science
Sreeramaiah N Gangappa, Javier F Botto
ELONGATED HYPOCOTYL5 (HY5), a member of the bZIP transcription factor family, inhibits hypocotyl growth and lateral root development, and promotes pigment accumulation in a light-dependent manner in Arabidopsis. Recent research on its role in different processes such as hormone, nutrient, abiotic stress (abscisic acid, salt, cold), and reactive oxygen species signaling pathways clearly places HY5 at the center of a transcriptional network hub. HY5 regulates the transcription of a large number of genes by directly binding to cis-regulatory elements...
October 10, 2016: Molecular Plant
Daniel M Mutyambai, Toby J A Bruce, Johnnie van den Berg, Charles A O Midega, John A Pickett, Zeyaur R Khan
Attack of plants by herbivorous arthropods may result in considerable changes to the plant's chemical phenotype with respect to emission of herbivore-induced plant volatiles (HIPVs). These HIPVs have been shown to act as repellents to the attacking insects as well as attractants for the insects antagonistic to these herbivores. Plants can also respond to HIPV signals from other plants that warn them of impending attack. Recent investigations have shown that certain maize varieties are able to emit volatiles following stemborer egg deposition...
2016: PloS One
Namshin Kim, Young-Min Jeong, Seongmun Jeong, Goon-Bo Kim, Seunghoon Baek, Young-Eun Kwon, Ara Cho, Sang-Bong Choi, Jiwoong Kim, Won-Jun Lim, Kyoung Hyoun Kim, Won Park, Jae-Yoon Kim, Jin-Hyun Kim, Bomi Yim, Young Joon Lee, Byung-Moon Chun, Young-Pyo Lee, Beom-Seok Park, Hee-Ju Yu, Jeong-Hwan Mun
This study provides high-quality variation data of diverse radish genotypes. Genome-wide SNP comparison along with RNA-seq analysis identified candidate genes related to domestication that have potential as trait-related markers for genetics and breeding of radish. Radish (Raphanus sativus L.) is an annual root vegetable crop that also encompasses diverse wild species. Radish has a long history of domestication, but the origins and selective sweep of cultivated radishes remain controversial. Here, we present comprehensive whole-genome resequencing analysis of radish to explore genomic variation between the radish genotypes and to identify genetic bottlenecks due to domestication in Asian cultivars...
September 2016: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
Nan Jiang, Andrea I Doseff, Erich Grotewold
Flavones correspond to a flavonoid subgroup that is widely distributed in the plants, and which can be synthesized by different pathways, depending on whether they contain C- or O-glycosylation and hydroxylated B-ring. Flavones are emerging as very important specialized metabolites involved in plant signaling and defense, as well as key ingredients of the human diet, with significant health benefits. Here, we appraise flavone formation in plants, emphasizing the emerging theme that biosynthesis pathway determines flavone chemistry...
2016: Plants (Basel, Switzerland)
Deyue Yang, Daniel D Seaton, Johanna Krahmer, Karen J Halliday
Plants sense the light environment through an ensemble of photoreceptors. Members of the phytochrome class of light receptors are known to play a critical role in seedling establishment, and are among the best-characterized plant signaling components. Phytochromes also regulate adult plant growth; however, our knowledge of this process is rather fragmented. This study demonstrates that phytochrome controls carbon allocation and biomass production in the developing plant. Phytochrome mutants have a reduced CO2 uptake, yet overaccumulate daytime sucrose and starch...
July 5, 2016: Proceedings of the National Academy of Sciences of the United States of America
Wei Chi, Jing Li, Baoye He, Xin Chai, Xiumei Xu, Xuwu Sun, Jingjing Jiang, Peiqiang Feng, Jianru Zuo, Rongcheng Lin, Jean-David Rochaix, Lixin Zhang
Cytokinin is an essential phytohormone that controls various biological processes in plants. A number of response regulators are known to be important for cytokinin signal transduction. ARABIDOPSIS RESPONSE REGULATOR 4 (ARR4) mediates the cross-talk between light and cytokinin signaling through modulation of the activity of phytochrome B. However, the mechanism that regulates the activity and stability of ARR4 is unknown. Here we identify an ATP-independent serine protease, degradation of periplasmic proteins 9 (DEG9), which localizes to the nucleus and regulates the stability of ARR4...
June 21, 2016: Proceedings of the National Academy of Sciences of the United States of America
Justine Braguy, Matias D Zurbriggen
Plants deploy a wide array of signalling networks integrating environmental cues with growth, defence and developmental responses. The high level of complexity, redundancy and connection between several pathways hampers a comprehensive understanding of involved functional and regulatory mechanisms. The implementation of synthetic biology approaches is revolutionizing experimental biology in prokaryotes, yeasts and animal systems and can likewise contribute to a new era in plant biology. This review gives an overview on synthetic biology approaches for the development and implementation of synthetic molecular tools and techniques to interrogate, understand and control signalling events in plants, ranging from strategies for the targeted manipulation of plant genomes up to the spatiotemporally resolved control of gene expression using optogenetic approaches...
July 2016: Plant Journal: for Cell and Molecular Biology
Bradleigh Hocking, Stephen D Tyerman, Rachel A Burton, Matthew Gilliham
Calcium has well-documented roles in plant signaling, water relations and cell wall interactions. Significant research into how calcium impacts these individual processes in various tissues has been carried out; however, the influence of calcium on fruit ripening has not been thoroughly explored. Here, we review the current state of knowledge on how calcium may impact the development, physical traits and disease susceptibility of fruit through facilitating developmental and stress response signaling, stabilizing membranes, influencing water relations and modifying cell wall properties through cross-linking of de-esterified pectins...
2016: Frontiers in Plant Science
Bo Li, Xiangzong Meng, Libo Shan, Ping He
Perception of microbe-associated molecular patterns (MAMPs) by cell-surface-resident pattern recognition receptors (PRRs) induces rapid, robust, and selective transcriptional reprogramming, which is central for launching effective pattern-triggered immunity (PTI) in plants. Signal relay from PRR complexes to the nuclear transcriptional machinery via intracellular kinase cascades rapidly activates primary immune response genes. The coordinated action of gene-specific transcription factors and the general transcriptional machinery contribute to the selectivity of immune gene activation...
May 11, 2016: Cell Host & Microbe
David Turrà, Daniela Nordzieke, Stefania Vitale, Mennat El Ghalid, Antonio Di Pietro
The ability to grow as filamentous hyphae defines the lifestyle of fungi. Hyphae are exposed to a variety of chemical stimuli such as nutrients or signal molecules from mating partners and host organisms. How fungi sense and process this chemical information to steer hyphal growth is poorly understood. Saccharomyces cerevisiae and Neurospora crassa have served as genetic models for the identification of cellular components functioning in chemotropism. A recent study in the pathogen Fusarium oxysporum revealed distinct MAPK pathways governing hyphal growth towards nutrient sources and sex pheromones or plant signals, suggesting an unanticipated complexity of chemosensing during fungus-host interactions...
September 2016: Seminars in Cell & Developmental Biology
Tom Bennett, Geneviève Hines, Martin van Rongen, Tanya Waldie, Megan G Sawchuk, Enrico Scarpella, Karin Ljung, Ottoline Leyser
The bulk polar movement of the plant signaling molecule auxin through the stem is a long-recognized but poorly understood phenomenon. Here we show that the highly polar, high conductance polar auxin transport stream (PATS) is only part of a multimodal auxin transport network in the stem. The dynamics of auxin movement through stems are inconsistent with a single polar transport regime and instead suggest widespread low conductance, less polar auxin transport in the stem, which we term connective auxin transport (CAT)...
April 2016: PLoS Biology
Klaus Palme, William Teale, Alexander Dovzhenko
A new report shows that the HY5 transcription factor moves from shoots to roots in plants, mediating light regulation of root growth and nitrate uptake. This finding offers not only a mechanistic insight into shoot-root communication, but also scope for increasing crop yields.
April 25, 2016: Current Biology: CB
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