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https://www.readbyqxmd.com/read/29341868/transcriptional-evidence-for-crosstalk-between-ja-and-et-or-sa-during-root-knot-nematode-invasion-in-tomato
#1
Wenchao Zhao, Xiaoxuan Zhou, Hui Lei, Jingwei Fan, Rui Yang, Zilong Li, Canli Hu, Mengyan Li, Fukuan Zhao, Shaohui Wang
Previous studies have demonstrated that jasmonic acid (JA) reduces root-knot nematode (RKN) infections in tomato plants. RKN invasion is sensed by roots, and root-derived JA signaling activates systemic defense responses, though this is poorly understood. Here, we investigate variations in the RKN-induced transcriptome in scion phloem between two tomato plant grafts: CM/CM (Lycopersicum esculentum Mill. cv. Castlemart) and CM/spr2 (a JA-deficient mutant). A total of 8,716 genes were differentially expressed in the scion phloem of the plants with JA-deficient rootstock...
December 20, 2017: Physiological Genomics
https://www.readbyqxmd.com/read/29340758/plants-eavesdrop-on-cues-produced-by-snails-and-induce-costly-defenses-that-affect-insect-herbivores
#2
John L Orrock, Brian M Connolly, Won-Gyu Choi, Peter W Guiden, Sarah J Swanson, Simon Gilroy
Although induced defenses are widespread in plants, the degree to which plants respond to herbivore kairomones (incidental chemicals that herbivores produce independent of herbivory), the costs and benefits of responding to cues of herbivory risk, and the ecological consequences of induced defenses remain unclear. We demonstrate that undamaged tomatoes, Solanum lycopersicum, induce defenses in response to a kairomone (locomotion mucus) of snail herbivores (Helix aspersa). Induced defense had significant costs and benefits for plants: plants exposed to snail mucus or a standard defense elicitor (methyl jasmonate, MeJA) exhibited slower growth, but also experienced less herbivory by an insect herbivore (Spodoptera exigua)...
January 16, 2018: Oecologia
https://www.readbyqxmd.com/read/29338341/rna-sequencing-on-amomum-villosum-lour-induced-by-meja-identifies-the-genes-of-wrky-and-terpene-synthases-involved-in-terpene-biosynthesis
#3
Xueying He, Huan Wang, Jinfen Yang, Ke Deng, Teng Wang
Amomum villosum Lour. is an important Chinese medicine that has diverse medicinal functions, and mainly contains volatile terpenes This study aimed to explore the WRKY transcription factors (TFs) and terpene synthases (TPS) unigenes, which might be involved in terpene biosynthesis in A. villosum for providing some new information on the regulation of terpenes in plants. RNA sequencing of A.villosum-induced by methyl jasmonate (MeJA) revealed WRKY family was the second biggest TF family in the transcriptome...
January 16, 2018: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/29337971/plant-hormones-metabolic-end-run-to-jasmonate
#4
Gregg A Howe
No abstract text is available yet for this article.
January 16, 2018: Nature Chemical Biology
https://www.readbyqxmd.com/read/29327360/aboveground-herbivory-induced-jasmonates-disproportionately-reduce-plant-reproductive-potential-by-facilitating-root-nematode-infestation
#5
Ricardo A R Machado, Carla C M Arce, Michael A McClure, Ian T Baldwin, Matthias Erb
Different plant-feeders, including insects and parasitic nematodes, can influence each other by triggering systemic changes in their shared host plants. In most cases however, the underlying mechanisms are unclear, and the consequences for plant fitness are not well understood. We studied the interaction between leaf feeding Manduca sexta caterpillars and root parasitic nematodes in Nicotiana attenuata. Simulated Manduca sexta attack increased the abundance of root parasitic nematodes in the field and facilitated Meloidogyne incognita reproduction in the glasshouse...
January 12, 2018: Plant, Cell & Environment
https://www.readbyqxmd.com/read/29325990/quantitative-proteomics-reveals-a-role-of-jaz7-in-plant-defense-response-to-pseudomonas-syringae-dc3000
#6
Tong Zhang, Li Meng, Wenwen Kong, Zepeng Yin, Yang Wang, Jacqueline D Schneider, Sixue Chen
Jasmonate ZIM-domain (JAZ) proteins are key transcriptional repressors regulating various biological processes. Although many studies have studied JAZ proteins by genetic and biochemical analyses, little is known about JAZ7-associated global protein networks and how JAZ7 contributes to bacterial pathogen defense. In this study, we aim to fill this knowledge gap by conducting unbiased large-scale quantitative proteomics using tandem mass tags (TMT). We compared the proteomes of a JAZ7 knock-out line, a JAZ7 overexpression line, as well as the wild type Arabidopsis plants in the presence and absence of Pseudomonas syringae DC3000 infection...
January 8, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/29321851/specificity-of-herbivore-induced-responses-in-an-invasive-species-alternanthera-philoxeroides-alligator-weed
#7
Mu Liu, Fang Zhou, Xiaoyun Pan, Zhijie Zhang, Milton B Traw, Bo Li
Herbivory-induced responses in plants can both negatively affect subsequently colonizing herbivores and mitigate the effect of herbivory on the host. However, it is still less known whether plants exhibit specific responses to specialist and generalist herbivores in non-secondary metabolite traits and how specificity to specialists and generalists differs between invasive and native plant populations. We exposed an invasive plant, Alternanthera philoxeroides, to Agasicles hygrophila (Coleoptera, Chrysomelidae; specialist), Spodoptera litura (Lepidoptera, Noctuidae; generalist), manual clipping, or application of exogenous jasmonic acid and examined both the specificity of elicitation in traits of fitness (e...
January 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29321675/overexpression-of-a-constitutively-active-truncated-form-of-oscdpk1-confers-disease-resistance-by-affecting-ospr10a-expression-in-rice
#8
Siou-Luan He, Jian-Zhi Jiang, Bo-Hong Chen, Chun-Hsiang Kuo, Shin-Lon Ho
The rice pathogenesis-related protein OsPR10a was scarcely expressed in OsCDPK1-silenced (Ri-1) rice, which was highly sensitive to pathogen infection. After inoculating the leaves with bacterial blight (Xanthomonas oryzae pv. oryzae; Xoo), we found that the expression of OsPR10a was up- and down-regulated in OEtr-1 (overexpression of the constitutively active truncated form of OsCDPK1) and Ri-1 rice plants, respectively. OsPR10a and OsCDPK1 showed corresponding expression patterns and were up-regulated in response to the jasmonic acid, salicylic acid and Xoo treatments, and OsPR1 and OsPR4 were significantly up-regulated in OEtr-1...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29321619/ultraviolet-b-enhances-the-resistance-of-multiple-plant-species-to-lepidopteran-insect-herbivory-through-the-jasmonic-acid-pathway
#9
Jinfeng Qi, Mou Zhang, Chengkai Lu, Christian Hettenhausen, Qing Tan, Guoyan Cao, Xudong Zhu, Guoxing Wu, Jianqiang Wu
Land plants protect themselves from ultraviolet-B (UV-B) by accumulating UV-absorbing metabolites, which may also function as anti-insect toxins. Previous studies have shown that UV-B enhances the resistance of different plant species to pierce-sucking pests; however, whether and how UV-B influences plant defense against chewing caterpillars are not well understood. Here we show that UV-B treatment increased Spodoptera litura herbivory-induced jasmonic acid (JA) production in Arabidopsis and thereby Arabidopsis exhibited elevated resistance to S...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29319235/elevated-co2-differentially-affects-tobacco-and-rice-defense-against-lepidopteran-larvae-via-the-jasmonic-acid-signaling-pathway
#10
Chengkai Lu, Jinfeng Qi, Christian Hettenhausen, Yunting Lei, Jingxiong Zhang, Mou Zhang, Cuiping Zhang, Juan Song, Jing Li, Guoyan Cao, Saif Ul Malook, Jianqiang Wu
Atmospheric CO2 levels are rapidly increasing due to human activities. However, the effects of elevated CO2 (ECO2 ) on plant defense against insects and the underlying mechanisms remain poorly understood. Here we show that ECO2 increased the photosynthetic rates and the biomass of tobacco and rice plants, and the chewing lepidopteran insects Spodoptera litura and Mythimna separata gained less and more mass on tobacco and rice plants, respectively. Consistently, under ECO2 , the levels of jasmonic acid (JA), the main phytohormone controlling plant defense against these lepidopteran insects, as well as the main defense-related metabolites, were increased and decreased in insect-damaged tobacco and rice plants...
January 10, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29316708/carbon-monoxide-potentiates-high-temperature-induced-nicotine-biosynthesis-in-tobacco
#11
Tielong Cheng, Liwei Hu, Pengkai Wang, Xiuyan Yang, Ye Peng, Ye Lu, Jinhui Chen, Jisen Shi
Carbon monoxide (CO) acts as an important signal in many physiological responses in plants, but its role in plant secondary metabolism is still unknown. Nicotine is the main alkaloid generated in tobacco and the plant hormone jasmonic acid (JA) has previously been reported to efficiently induce its biosynthesis. Whether and how CO interacts with JA to regulate nicotine biosynthesis in tobacco remains elusive. In this study, we demonstrate that high temperature (HT) induces quick accumulation of nicotine in tobacco roots, combined with an increase in CO and JA concentration...
January 8, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29314046/jasmonic-and-salicylic-acid-response-in-the-fern-azolla-filiculoides-and-its-cyanobiont
#12
Sophie de Vries, Jan de Vries, Hendrik Teschke, Janina K von Dahlen, Laura E Rose, Sven B Gould
Plants sense and respond to microbes utilizing a multilayered signalling cascade. In seed plants, the phytohormones jasmonic and salicylic acid (JA and SA) are key denominators of how plants respond to certain microbes. Their interplay is especially well-known for tipping the scales in plants' strategies of dealing with phytopathogens. In non-seed plant lineages, the interplay is less well understood, but current data indicates that it is intertwined to a lesser extent and the canonical JA/SA antagonism appears to be absent...
January 3, 2018: Plant, Cell & Environment
https://www.readbyqxmd.com/read/29313187/allelic-variants-of-ossub1a-cause-differential-expression-of-transcription-factor-genes-in-response-to-submergence-in-rice
#13
Niharika Sharma, Trang Minh Dang, Namrata Singh, Slobodan Ruzicic, Bernd Mueller-Roeber, Ute Baumann, Sigrid Heuer
BACKGROUND: Flooding during seasonal monsoons affects millions of hectares of rice-cultivated areas across Asia. Submerged rice plants die within a week due to lack of oxygen, light and excessive elongation growth to escape the water. Submergence tolerance was first reported in an aus-type rice landrace, FR13A, and the ethylene-responsive transcription factor (TF) gene SUB1A-1 was identified as the major tolerance gene. Intolerant rice varieties generally lack the SUB1A gene but some intermediate tolerant varieties, such as IR64, carry the allelic variant SUB1A-2...
January 8, 2018: Rice
https://www.readbyqxmd.com/read/29311497/the-effects-of-abscisic-acid-salicylic-acid-and-jasmonic-acid-on-lipid-accumulation-in-two-freshwater-chlorella-strains
#14
Guanxun Wu, Zhengquan Gao, Huanmin Du, Bin Lin, Yuchen Yan, Guoqiang Li, Yanyun Guo, Shenggui Fu, Gongxiang Wei, Miaomiao Wang, Meng Cui, Chunxiao Meng
Sustainable renewable energy is being hotly debated globally because the continued use of finite fossil fuels is now widely recognized as being unsustainable. Microalgae potentially offer great opportunities for resolving this challenge. Abscisic acid (ABA), jasmonic acid (JA) and salicylic acid (SA) are involved in regulating many physiological properties and have been widely used in higher plants. To test if phytohormones have an impact on accumulating lipid for microalgae, ABA, JA and SA were used to induce two Chlorella strains in the present study...
December 30, 2017: Journal of General and Applied Microbiology
https://www.readbyqxmd.com/read/29306633/development-of-an-improved-sample-preparation-platform-for-acidic-endogenous-hormones-in-plant-tissues-using-electromembrane-extraction
#15
Joon Hyuk Suh, Sang Beom Han, Yu Wang
Despite their importance in pivotal signaling pathways due to trace quantities and complex matrices, the analysis of plant hormones is a challenge. Here, to improve this issue, we present an electromembrane extraction technology combined with liquid chromatography-tandem mass spectrometry for determination of acidic plant hormones including jasmonic acid, abscisic acid, salicylic acid, benzoic acid, gibberellic acid and gibberellin A4 in plant tissues. Factors influencing extraction efficiency, such as voltage, extraction time and stirring rate were optimized using a design of experiments...
December 30, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29306046/circadian-evening-complex-represses-jasmonate-induced-leaf-senescence-in-arabidopsis
#16
Yuanyuan Zhang, Yan Wang, Hua Wei, Na Li, Wenwen Tian, Kang Chong, Lei Wang
Plants initiate leaf senescence to reallocate energy and nutrients from the aging to developing tissues for optimizing growth fitness and reproduction at the end of growing season or under stress. Jasmonate (JA), a lipid-derived phytohormone, is known as an important endogenous singal in inducing leaf senescence. However, whether and how circadian clock gates JA signaling to induce leaf senescence in plants remains elusive. In this study, we show that the Evening Complex (EC), a core component of circadian oscillator, negatively regulates leaf senescence in Arabidopsis thaliana...
January 3, 2018: Molecular Plant
https://www.readbyqxmd.com/read/29304736/transcriptome-analysis-of-response-to-plasmodiophora-brassicae-infection-in-the-arabidopsis-shoot-and-root
#17
Solmaz Irani, Brett Trost, Matthew Waldner, Naghabushana Nayidu, Jiangying Tu, Anthony J Kusalik, Christopher D Todd, Yangdou Wei, Peta C Bonham-Smith
BACKGROUND: Clubroot is an important disease caused by the obligate parasite Plasmodiophora brassicae that infects the Brassicaceae. As a soil-borne pathogen, P. brassicae induces the generation of abnormal tissue in the root, resulting in the formation of galls. Root infection negatively affects the uptake of water and nutrients in host plants, severely reducing their growth and productivity. Many studies have emphasized the molecular and physiological effects of the clubroot disease on root tissues...
January 5, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29304107/allene-oxide-synthase-allene-oxide-cyclase-and-jasmonic-acid-levels-in-lotus-japonicus-nodules
#18
Anna Zdyb, Marco G Salgado, Kirill N Demchenko, Wolfram G Brenner, Małgorzata Płaszczyca, Michael Stumpe, Cornelia Herrfurth, Ivo Feussner, Katharina Pawlowski
Jasmonic acid (JA), its derivatives and its precursor cis-12-oxo phytodienoic acid (OPDA) form a group of phytohormones, the jasmonates, representing signal molecules involved in plant stress responses, in the defense against pathogens as well as in development. Elevated levels of JA have been shown to play a role in arbuscular mycorrhiza and in the induction of nitrogen-fixing root nodules. In this study, the gene families of two committed enzymes of the JA biosynthetic pathway, allene oxide synthase (AOS) and allene oxide cyclase (AOC), were characterized in the determinate nodule-forming model legume Lotus japonicus JA levels were to be analysed in the course of nodulation...
2018: PloS One
https://www.readbyqxmd.com/read/29302304/novel-mechanisms-for-organic-acid-mediated-aluminium-tolerance-in-roots-and-leaves-of-two-contrasting-soybean-genotypes
#19
Shou-Cheng Huang, Shu-Juan Chu, Yu-Min Guo, Ya-Jing Ji, Dong-Qing Hu, Jing Cheng, Gui-Hua Lu, Rong-Wu Yang, Cheng-Yi Tang, Jin-Liang Qi, Yong-Hua Yang
Aluminium (Al) toxicity is one of the most important limiting factors for crop yield in acidic soils. However, the mechanisms that confer Al tolerance still remain largely unknown. To understand the molecular mechanism that confers different tolerance to Al, we performed global transcriptome analysis to the roots and leaves of two contrasting soybean genotypes, BX10 (Al-tolerant) and BD2 (Al-sensitive) under 0 and 50 μM Al3+ treatments, respectively. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes analyses revealed that the expression levels of the genes involved in lipid/carbohydrate metabolism and jasmonic acid (JA)-mediated signalling pathway were highly induced in the roots and leaves of both soybean genotypes...
November 2017: AoB Plants
https://www.readbyqxmd.com/read/29301510/exogenous-short-term-silicon-application-regulates-macro-nutrients-endogenous-phytohormones-and-protein-expression-in-oryza-sativa-l
#20
Soo-Won Jang, Yoonha Kim, Abdul Latif Khan, Chae-In Na, In-Jung Lee
BACKGROUND: Silicon (Si) has been known to regulate plant growth; however, the underlying mechanisms of short-term exogenous Si application on the regulation of calcium (Ca) and nitrogen (N), endogenous phytohormones, and expression of essential proteins have been little understood. RESULTS: Exogenous Si application significantly increased Si content as compared to the control. Among Si treatments, 1.0 mM Si application showed increased phosphorus content as compared to other Si treatments (0...
January 4, 2018: BMC Plant Biology
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