Read by QxMD icon Read


S Chiangga, W Pornkaveerat, T D Frank
Three studies were considered in which jasmonate-isoleucine levels were observed for several hours after plant wounding. The data from these studies were fitted to a first order kinetical model describing jasmonate-isoleucine complex formation and dissociation. It was found that the model could explain up to 97 percent of the variations in the data sets. In general, the data re-analysis confirmed that the protein-protein interactions involved in the biosynthesis and dissociation of the jasmonate-isoleucine complex are fast relative to the dynamics of the jasmonate levels themselves...
September 23, 2016: Journal of Plant Physiology
Ting Li, Tristan M Cofer, Marie J Engelberth, Jurgen Engelberth
Previously, we described a priming effect of α-linolenic acid (LnA) on anti-herbivore defense response in maize seedlings (1) . We showed that exogenous application of LnA stimulated higher jasmonic acid (JA) accumulation and herbivore-induced plant volatile (HIPV) emission after treatment with insect elicitor (IE). To further investigate the specificity of LnA's priming effect, we incubated maize seedlings in palmitoleic acid (PeicA), γ-linolenic acid (γ LnA) and stearic acid (StA) solutions, and analyzed HIPV emission in response to IE...
October 20, 2016: Plant Signaling & Behavior
Ulrike Glaubitz, Xia Li, Sandra Schaedel, Alexander Erban, Ronan Sulpice, Joachim Kopka, Dirk K Hincha, Ellen Zuther
Transcript and metabolite profiling were performed on leaves from six rice cultivars under high night temperature (HNT) condition. Six genes were identified as central for HNT response encoding proteins involved in transcription regulation, signal transduction, protein-protein interactions, jasmonate response, and the biosynthesis of secondary metabolites. Sensitive cultivars showed specific changes in transcript abundance including abiotic stress responses, changes of cell wall related genes, of ABA signaling and secondary metabolism...
October 20, 2016: Plant, Cell & Environment
Yasuhiro Ishimaru, Takaya Oikawa, Takeshi Suzuki, Syohei Takeishi, Hideyuki Matsuura, Kosaku Takahashi, Shin Hamamoto, Nobuyuki Uozumi, Takafumi Shimizu, Mitsunori Seo, Hiroyuki Ohta, Minoru Ueda
Jasmonates are major plant hormones involved in wounding responses. Systemic wounding responses are induced by an electrical signal derived from damaged leaves. After the signaling, jasmonic acid (JA) and jasmonoyl-l-isoleucine (JA-Ile) are translocated from wounded to undamaged leaves, but the molecular mechanism of the transport remains unclear. Here, we found that a JA-Ile transporter, GTR1, contributed to these translocations in Arabidopsis thaliana. GTR1 was expressed in and surrounding the leaf veins both of wounded and undamaged leaves...
October 20, 2016: Bioscience, Biotechnology, and Biochemistry
Jianbin Yan, Suhua Li, Min Gu, Ruifeng Yao, Yuwen Li, Juan Chen, Mai Yang, Fajun Nan, Xie Daoxin
Jasmonates (JAs) regulate a wide range of plant defense and development processes. The bioactive JA is perceived by its receptor COI1 to trigger the degradation of JASMONATE ZIM-DOMAIN (JAZ) proteins and subsequently de-repress the JAZ-repressed transcription factors for activation of expression of JA-responsive genes. Only (+)-7-iso-JA-L-Ile was so far identified as endogenous bioactive JA molecule. Here, we designed coronafacic acid (CFA) conjugates with all the amino acids (CFA-AA) to mimic the JA amino acid conjugates, and revealed that (+)-7-iso-JA-Leu, (+)-7-iso-JA-Val, (+)-7-iso-JA-Met and (+)-7-iso-JA-Ala are new endogenous bioactive JA molecules...
October 17, 2016: Plant Physiology
Gema Flores, Gracia Patricia Blanch, María Luisa Ruiz Del Castillo
BACKGROUND: The nutritional effects of both table olives and olive oil are attributed not only to their fatty acids but also to antioxidant phenolics such as phenolic acids. Delays in oil processing usually result in undesirable oxidation and hydrolysis processes leading to formation of free fatty acids. These alterations create the need to process oil immediately after olive harvest. However, phenolic content decreases drastically during olive storage resulting in lower quality oil. In the present study we propose postharvest methyl jasmonate treatment as a mean to avoid changes in fatty acid composition and losses of phenolic acids during olive storage...
October 18, 2016: Journal of the Science of Food and Agriculture
Yan-Lun Ju, Min Liu, Hui Zhao, Jiang-Fei Meng, Yu-Lin Fang
The anthocyanin composition, fatty acids, and volatile aromas are important for Cabernet Sauvignon grape quality. This study evaluated the effect of exogenous abscisic acid (ABA) and methyl jasmonate (MeJA) on the anthocyanin composition, fatty acids, lipoxygenase activity, and the volatile compounds of Cabernet Sauvignon grape berries. Exogenous ABA and MeJA improved the content of total anthocyanins (TAC) and individual anthocyanins. Lipoxygenase (LOX) activity also increased after treatment. Furthermore, 16 fatty acids were detected...
October 12, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Hari Bhupathi Krishnan, Alaa Alaswad, Nathan Wayne Oehrle, Jason Gillman
Legumes form symbiotic association with soil-dwelling bacteria collectively called rhizobia. This association results in the formation of nodules, unique plant-derived organs, within which the rhizobia are housed. Rhizobia encoded-nitrogenase facilitates the conversation of atmospheric nitrogen into ammonia, which is utilized by the plants for its growth and development. Fatty acids have been shown to play an important role in root nodule symbiosis. In this study, we have investigated the role of Stearoyl-Acyl Carrier Protein Desaturase- isoform C (SACPD-C), a soybean enzyme that catalyzes the conversion of stearic acid into oleic acid, which is expressed in developing seeds and in nitrogen fixing nodules...
October 17, 2016: Molecular Plant-microbe Interactions: MPMI
Jingxue Wang, Sanjay K Singh, Chunfang Du, Chen Li, Jianchun Fan, Sitakanta Pattanaik, Ling Yuan
Rapeseed (Brassica napus) is an important oil seed crop, providing more than 13% of the world's supply of edible oils. An in-depth knowledge of the gene network involved in biosynthesis and accumulation of seed oil is critical for the improvement of B. napus. Using available genomic and transcriptomic resources, we identified 1,750 acyl-lipid metabolism (ALM) genes that are distributed over 19 chromosomes in the B. napus genome. B. rapa and B. oleracea, two diploid progenitors of B. napus, contributed almost equally to the ALM genes...
2016: Frontiers in Plant Science
Jinxin Li, Shujie Liu, Juan Wang, Jing Li, Dahui Liu, Jianli Li, Wenyuan Gao
In this work, we selected three fungi strains (Aspergillus niger, Aspergillus flavus and Aspergillus oryzae) as elicitors prepared from mycelium or fermentation broth to improve ginsenosides production in adventitious roots culture. The results showed that ginsenosides production (29.90±4.67mgg(-1)) was significantly enhanced upon elicitation with 200mgL(-1)A. niger elicitor prepared from mycelium, which was 3.52-fold of untreated group. HPLC-ESI-MS(n) analysis was performed, showing that ginsenoside Rb3 was present after treatment with the A...
October 13, 2016: Journal of Biotechnology
Huihong Guo, Rufang Li, Shibiao Liu, Na Zhao, Shuo Han, Mengmeng Lu, Xiaomin Liu, Xinli Xia
Gynostemma pentaphyllum (Thunb.) Makino is a perennial medicinal herb widely distributed in China. This herb contains important medicinal components called gypenosides, which belong to dammarane-type triterpenoid saponins. Squalene epoxidase (SE, EC catalyzes the epoxidation of squalene to form oxidosqualene and is a key regulatory enzyme in triterpenoid saponin biosynthesis. In this study, a SE gene designated as GpSE1 was isolated from G. pentaphyllum leaves. The deduced protein sequence of GpSE1 contained two conserved domains involved in the catalytic function of SE...
October 6, 2016: Plant Physiology and Biochemistry: PPB
Jingyu Lin, Dan Wang, Xinlu Chen, Tobias G Köllner, Mitra Mazarei, Hong Guo, Vincent R Pantalone, Prakash Arelli, Charles Neal Stewart, Ningning Wang, Feng Chen
Plant terpene synthase genes (TPSs) have roles in diverse biological processes. Here we report the functional characterization of one member of the soybean TPS gene family, which was designated GmAFS. Recombinant GmAFS produced in Escherichia coli catalyzed the formation of a sesquiterpene (E,E)-α-farnesene. GmAFS is closely related to (E,E)-α-farnesene synthase gene from apple, both phylogenetically and structurally. GmAFS was further investigated for its biological role in defense against nematodes and insects...
October 13, 2016: Plant Biotechnology Journal
Berta Gallego, Soledad Martos, Catalina Cabot, Juan Barceló, Charlotte Poschenrieder
The hypothesis of metal defense as a substitute for a defective biotic stress signaling system in metal hyperaccumulators was tested using the pathosystem Alternaria brassicicola - Noccaea caerulescens under low (2 μM), medium (12 μM), and high (102 μM) Zn supply. Regardless the Zn supply, N. caerulescens responded to fungal attack with the activation of both HMA4 coding for a Zn transporter, and biotic stress signaling pathways. Salicylate, jasmonate, abscisic acid, and indoleacetic acid concentrations, as well as biotic stress marker genes (PDF1...
October 13, 2016: Physiologia Plantarum
Concha Domingo, Eric Lalanne, María M Catalá, Eva Pla, Juan L Reig-Valiente, Manuel Talón
Salinity is a complex trait that affects growth and productivity in many crops, including rice. Mutation induction, a useful tool to generate salt tolerant plants, enables the analysis of plants with similar genetic background, facilitating the understanding of the salt tolerance mechanisms. In this work, we generated three salt tolerant mutant lines by irradiation of a salt-sensitive cultivar plants and screened M2 plants at seedling stage in the presence of high salinity. These three lines, SaT20, SaS62, and SaT58, showed different responses to salinity, but exhibited similar phenotype to wild type plants, except SaT20 that displayed shorter height when grown in the absence of salt...
2016: Frontiers in Plant Science
Ilaria Forieri, Carsten Sticht, Michael Reichelt, Norbert Gretz, Malcolm J Hawkesford, Mario Malagoli, Markus Wirtz, Ruediger Hell
Deprivation of mineral nutrients causes significant retardation of plant growth. This retardation is associated with nutrient specific and general stress-induced transcriptional responses. In this study we adjusted the external supply of iron, potassium and sulfur to cause the same retardation of shoot growth. Nevertheless, limitation by individual nutrients resulted in specific morphological adaptations and distinct shifts within the root metabolite fingerprint. The metabolic shifts affected key metabolites of primary metabolism and the stress-related phytohormones, jasmonic-, salicylic- and abscisic acid...
October 10, 2016: Plant, Cell & Environment
Lijing Liu, Fathi-Mohamed Sonbol, Bethany Huot, Yangnan Gu, John Withers, Musoki Mwimba, Jian Yao, Sheng Yang He, Xinnian Dong
It is an apparent conundrum how plants evolved effector-triggered immunity (ETI), involving programmed cell death (PCD), as a major defence mechanism against biotrophic pathogens, because ETI-associated PCD could leave them vulnerable to necrotrophic pathogens that thrive on dead host cells. Interestingly, during ETI, the normally antagonistic defence hormones, salicylic acid (SA) and jasmonic acid (JA) associated with defence against biotrophs and necrotrophs respectively, both accumulate to high levels. In this study, we made the surprising finding that JA is a positive regulator of RPS2-mediated ETI...
October 11, 2016: Nature Communications
Sheng Xu, Yumei Jiang, Ning Wang, Bing Xia, Yilong Jiang, Xiaodan Li, Zhengzhi Zhang, Yikui Li, Ren Wang
BACKGROUND: Lycoris aurea is a medicine-valuable and ornamental herb widely distributed in China. Former studied have showed that methyl jasmonate (MJ) treatment could increase the content of glanthamine-a worldwide medicine for symptomatic treatment of Alzheimer's disease in genus Lycoris plants. To explore the possible role of miRNAs in the regulation of jasmonic acid signaling pathway and uncover their potential correlations, we investigated the expression profiles of small RNAs (sRNAs) and their targets in Lycoris aurea, with MJ treatment by using next-generation deep sequencing...
October 10, 2016: BMC Genomics
Livia M S Ataide, Maria L Pappas, Bernardus C J Schimmel, Antonio Lopez-Orenes, Juan M Alba, Marcus V A Duarte, Angelo Pallini, Robert C Schuurink, Merijn R Kant
Inducible anti-herbivore defenses in plants are predominantly regulated by jasmonic acid (JA). On tomato plants, most genotypes of the herbivorous generalist spider mite Tetranychus urticae induce JA defenses and perform poorly on it, whereas the Solanaceae specialist Tetranychus evansi, who suppresses JA defenses, performs well on it. We asked to which extent these spider mites and the predatory mite Phytoseiulus longipes preying on these spider mites eggs are affected by induced JA-defenses. By artificially inducing the JA-response of the tomato JA-biosynthesis mutant def-1 using exogenous JA and isoleucine (Ile), we first established the relationship between endogenous JA-Ile-levels and the reproductive performance of spider mites...
November 2016: Plant Science: An International Journal of Experimental Plant Biology
Katrin Luck, Jan Jirschitzka, Sandra Irmisch, Meret Huber, Jonathan Gershenzon, Tobias G Köllner
BACKGROUND: Amino acid-derived aldoximes and nitriles play important roles in plant defence. They are well-known as precursors for constitutive defence compounds such as cyanogenic glucosides and glucosinolates, but are also released as volatiles after insect feeding. Cytochrome P450 monooxygenases (CYP) of the CYP79 family catalyze the formation of aldoximes from the corresponding amino acids. However, the majority of CYP79s characterized so far are involved in cyanogenic glucoside or glucosinolate biosynthesis and only a few have been reported to be responsible for nitrogenous volatile production...
October 4, 2016: BMC Plant Biology
X B Luo, Z Liu, L Xu, Y Wang, X W Zhu, W Zhang, W Chen, Y L Zhu, X J Su, M Everlyne, L W Liu
Glucosinolates (GSLs) are important secondary metabolites in Brassicaceae plants. Previous studies have mainly focused on GSL contents, types, and biosynthesis-related genes, but the molecular characterization patterns of GSL biosynthesis-related transcription factors remain largely unexplored in radish (Raphanus sativus L.). To isolate transcription factor genes regulating the GSL biosynthesis, genomic DNA and cDNA sequences of RsMYB28 and RsMYB29 genes were isolated in radish. Two R2R3-MYB domains were identified in the deduced amino acid sequences...
September 23, 2016: Genetics and Molecular Research: GMR
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"