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https://www.readbyqxmd.com/read/29151152/a-maize-inbred-exhibits-resistance-against-western-corn-rootwoorm-diabrotica-virgifera-virgifera
#1
Lina Castano-Duque, Kenneth W Loades, John F Tooker, Kathleen M Brown, W Paul Williams, Dawn S Luthe
Insect resistance against root herbivores like the western corn rootworm (WCR, Diabrotica virgifera virgifera) is not well understood in non-transgenic maize. We studied the responses of two American maize inbreds, Mp708 and Tx601, to WCR infestation using biomechanical, molecular, biochemical analyses, and laser ablation tomography. Previous studies performed on several inbreds indicated that these two maize genotypes differed in resistance to pests including fall armyworm (Spodoptera frugiperda) and WCR. Our data confirmed that Mp708 shows resistance against WCR, and demonstrates that the resistance mechanism is based in a multi-trait phenotype that includes increased resistance to cutting in nodal roots, stable root growth during insect infestation, constitutive and induced expression of known herbivore-defense genes, including ribosomal inhibitor protein 2 (rip2), terpene synthase 23 (tps23) and maize insect resistance cysteine protease-1 (mir1), as well high constitutive levels of jasmonic acid and production of (E)-β-caryophyllene...
November 18, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/29146946/de-novo-transcriptome-sequencing-of-meja-induced-taraxacum-koksaghyz-rodin-to-identify-genes-related-to-rubber-formation
#2
XinWen Cao, Jie Yan, JiLiang Lei, Jin Li, JianBo Zhu, HuiYan Zhang
Increase in the consumption of natural rubber (NR) has necessitated the identification of alternative sources of NR. The quality of NR produced by Taraxacum koksaghyz Rodin (TKS) is comparable to that from Hevea brasiliensis (H.brasiliensis), and therefore, TKS is being considered as an alternative source of NR. Here, we sequenced the TKS root transcriptome after wild TKS seedlings were treated with methyl jasmonate (MeJA) for 0, 6, and 24 h. The clean reads generated for each experimental line were assembled into 127,833 unigenes...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29146324/antioxidative-potentially-anti-inflammatory-and-antidiabetic-properties-as-well-as-oxidative-stability-and-acceptability-of-cakes-supplemented-with-elicited-basil
#3
Urszula Złotek
The aim of the study was to investigate the effect of addition of basil elicited with jasmonic acid (JA) on the biological properties, oxidative stability, and sensory quality of cakes. Simulated gastrointestinal digestion was used for determination of bioavailability. The antioxidant, anti-inflammatory and antidiabetic potential of fortified cakes were significantly higher than those of the control cakes. The antioxidant activity of the tested cakes was increased after addition of basil, proportionally to the amount of the additive...
March 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29140457/genistein-specific-g6dt-gene-for-the-inducible-production-of-wighteone-in-lotus-japonicus
#4
Jinyue Liu, Wenbo Jiang, Yaying Xia, Xuemin Wang, Guoan Shen, Yongzhen Pang
Prenylated isoflavonoids were found in several legume plants, and they possess various biological activities that play important roles in both plant defense and human health. However, it is still unknown whether prenylated isoflavonoids are present in the model legume plant L. japonicus. In the present study, we found that the prenylated isoflavonoid wighteone was produced in L. japonicus when the leaf was supplemented with genistein. Furthermore, a novel prenyltransferase gene LjG6DT was identified, which shared high similarity and was closely related with several known prenyltransferase genes involved in isoflavonoid biosynthesis...
November 10, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/29140446/up-regulation-of-mpk4-increases-the-feeding-efficiency-of-the-green-peach-aphid-under-elevated-co2-in-nicotiana-attenuata
#5
Huijuan Guo, Xinhong Peng, Liyuan Gu, Jianqiang Wu, Feng Ge, Yucheng Sun
Previous research has shown that elevated CO2 reduces plant resistance against insects and enhances the water use efficiency of C3 plants, which improves the feeding efficiency of aphids. Although plant mitogen-activated protein kinases (MAPKs) are known to regulate water relations and phytohormone-mediated resistance, little is known about the effect of elevated CO2 on MAPKs and the cascading effects on aphids. By using stably transformed Nicotiana attenuata plants silenced in MPK4, wound-induced protein kinase (WIPK), or salicylic acid-induced protein kinase (SIPK), we determined the functions of MAPKs in plant-aphid interactions and their responses to elevated CO2...
November 11, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29140303/two-cycloartenol-synthases-for-phytosterol-biosynthesis-in-polygala-tenuifolia-willd
#6
Mei Lan Jin, Woo Moon Lee, Ok Tae Kim
Oxidosqualene cyclases (OSCs) are enzymes that play a key role in control of the biosynthesis of phytosterols and triterpene saponins. In order to uncover OSC genes from Polygala tenuifolia seedlings induced by methyl jasmonate (MeJA), RNA-sequencing analysis was performed using the Illumina sequencing platform. A total of 148,488,632 high-quality reads from two samples (control and the MeJA treated) were generated. We screened genes related to phytosterol and triterpene saponin biosynthesis and analyzed the transcriptional changes of differentially expressed unigene (DEUG) values calculated by fragments per kilobase million (FPKM)...
November 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29138938/jasmonic-acid-induced-no-activates-mek1-2-in-regulating-the-metabolism-of-ascorbate-and-glutathione-in-maize-leaves
#7
Changjuan Shan, Haili Sun
This study investigated the relationship between MEK1/2 and nitric oxide (NO) in jasmonic acid (JA)-regulated metabolism of ascorbate and glutathione in maize leaves. The results showed that JA increased the activities of APX, GR, MDHAR, DHAR, GalLDH, and γ-ECS; the contents of AsA and GSH; and the production of NO. Above increases except for γ-ECS activity and NO production were all suppressed by pre-treatments with MEK1/2 inhibitors PD98059 and U0126. Above increases were all suppressed by pre-treatments with nitric oxide synthase (NOS) inhibitor L-NAME and NO scavenger cPTIO...
November 14, 2017: Protoplasma
https://www.readbyqxmd.com/read/29138909/improvement-of-biosynthesis-and-accumulation-of-bioactive-compounds-by-elicitation-in-adventitious-root-cultures-of-polygonum-multiflorum
#8
Thanh-Tam Ho, Jong-Du Lee, Cheol-Seung Jeong, Kee-Yoeup Paek, So-Young Park
We examined the effects of abiotic (methyl jasmonate [MeJA] and salicylic acid [SA]) and biotic (yeast extract and chitosan) elicitors for improvement of bioactive compounds production on adventitious root cultures in Polygonum multiflorum. The application of yeast extract resulted in significantly (p ≤ 0.05) higher dry root biomass (9.98 g/L) and relative growth rate versus the control. Cultures treated with abiotic elicitors showed higher percentage of dry weight than the other samples. Low concentrations of all elicitors (50 μM MeJA and SA, and 50 mg/L yeast extract) improved secondary metabolite production except for chitosan, whose performance was worse than that of the control...
November 14, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29136205/transcription-factor-asmyc2-controls-the-jasmonate-responsive-expression-of-ass1-regulating-sesquiterpene-biosynthesis-in-aquilaria-sinensis-lour-gilg
#9
Yan-Hong Xu, Yong-Cui Liao, Fei-Fei Lv, Zheng Zhang, Pei-Wen Sun, Zhi-Hui Gao, Ke-Ping Hu, Chun Sui, Yue Jin, Jian-He Wei
No abstract text is available yet for this article.
November 9, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/29132307/involvement-of-lemdr-an-atp-binding-cassette-protein-gene-in-shikonin-transport-and-biosynthesis-in-lithospermum-erythrorhizon
#10
Yu Zhu, Gui-Hua Lu, Zhuo-Wu Bian, Feng-Yao Wu, Yan-Jun Pang, Xiao-Ming Wang, Rong-Wu Yang, Cheng-Yi Tang, Jin-Liang Qi, Yong-Hua Yang
BACKGROUND: Shikonin is a naphthoquinone secondary metabolite with important medicinal value and is found in Lithospermum erythrorhizon. Considering the limited knowledge on the membrane transport mechanism of shikonin, this study investigated such molecular mechanism. RESULTS: We successfully isolated an ATP-binding cassette protein gene, LeMDR, from L. erythrorhizon. LeMDR is predominantly expressed in L. erythrorhizon roots, where shikonin accumulated. Functional analysis of LeMDR by using the yeast cell expression system revealed that LeMDR is possibly involved in the shikonin efflux transport...
November 13, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/29131830/transcriptome-profiling-and-digital-gene-expression-analysis-of-sweet-potato-for-the-identification-of-putative-genes-involved-in-the-defense-response-against-fusarium-oxysporum-f-sp-batatas
#11
Yuli Lin, Weikun Zou, Shiqiang Lin, Dennis Onofua, Zhijian Yang, Haizhou Chen, Songliang Wang, Xuanyang Chen
Sweet potato production is constrained by Fusarium wilt, which is caused by Fusarium oxysporum f. sp. batatas (Fob). The identification of genes related to disease resistance and the underlying mechanisms will contribute to improving disease resistance via sweet potato breeding programs. In the present study, we performed de novo transcriptome assembly and digital gene expression (DGE) profiling of sweet potato challenged with Fob using Illumina HiSeq technology. In total, 89,944,188 clean reads were generated from 12 samples and assembled into 101,988 unigenes with an average length of 666 bp; of these unigenes, 62,605 (61...
2017: PloS One
https://www.readbyqxmd.com/read/29131648/treatment-of-vinca-minor-leaves-with-methyl-jasmonate-extensively-alters-the-pattern-and-composition-of-indole-alkaloids
#12
Sara Abouzeid, Ulrike Beutling, Frank Surup, Fatma M Abdel Bar, Mohamed M Amer, Farid A Badria, Mahdi Yahyazadeh, Mark Brönstrup, Dirk Selmar
Alkaloids extracted from mature Vinca minor leaves were fractionated by preparative HPLC. By means of HRMS and NMR data, the main alkaloids were identified as vincamine, strictamine, 10-hydroxycathofoline, and vincadifformine. Upon treatment with methyl jasmonate (MeJA), the pattern and composition of the indole alkaloids changed extensively. While 10-hydroxycathofoline and strictamine concentrations remained unaltered, vincamine and vincadifformine levels showed a dramatic reduction. Upon MeJA treatment, four other indole alkaloids were detected in high quantities...
November 13, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/29129016/exploring-genes-involved-in-benzoic-acid-biosynthesis-in-the-populus-davidiana-transcriptome-and-their-transcriptional-activity-upon-methyl-jasmonate-treatment
#13
Seong-Bum Park, Jong Youn Kim, Jung Yeon Han, Chang-Ho Ahn, Eung-Jun Park, Yong Eui Choi
Benzoic acids (BAs) are important structural elements in a wide variety of essential compounds and natural products, and play crucial roles in plant fitness. BA is a precursor of diverse benzenoid compounds, including the hormone salicylic acid (SA) and the aglycone moiety of salicin, which is particularly important in the Salicaceae family. The biosynthetic pathways leading to BA formation in plants are largely unknown. Recently, the CoA-dependent β-oxidative BA biosynthesis pathway, which occurs in peroxisomes, has been characterized in petunia...
November 11, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/29127881/grapevine-immune-signaling-network-in-response-to-drought-stress-as-revealed-by-transcriptomic-analysis
#14
Muhammad S Haider, Mahantesh M Kurjogi, M Khalil-Ur-Rehman, Muhammad Fiaz, Tariq Pervaiz, Songtao Jiu, Jia Haifeng, Wang Chen, Jinggui Fang
Drought is a ubiquitous abiotic factor that severely impedes growth and development of horticulture crops. The challenge postured by global climate change is the evolution of drought-tolerant cultivars that could cope with concurrent stress. Hence, in this study, biochemical, physiological and transcriptome analysis were investigated in drought-treated grapevine leaves. The results revealed that photosynthetic activity and reducing sugars were significantly diminished which were positively correlated with low stomatal conductance and CO2 exchange in drought-stressed leaves...
October 31, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29125388/conserved-function-of-mediator-in-regulating-nuclear-hormone-receptor-activation-between-plants-and-animals
#15
Qingzhe Zhai, Lin Li, Chunpeng An, Chuanyou Li
Perception of the plant hormone jasmonoyl-isoleucine (JA-Ile) involves the formation of a co-receptor complex between COI1, the F-box subunit of a SCF-type E3 ubiquitin ligase, and its substrates, a group of jasmonate ZIM-domain (JAZ) transcriptional repressors. In recent studies, we show that MED25, a subunit of the Arabidopsis Mediator, physically and functionally interacts with COI1 and the master transcription factor MYC2 on MYC2 target promoters. Here we provide evidence that MED25 also physically interacts with a subset of JAZ proteins...
November 10, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/29124341/phytophagy-of-omnivorous-predator-macrolophus-pygmaeus-affects-performance-of-herbivores-through-induced-plant-defences
#16
Nina Xiaoning Zhang, Gerben J Messelink, Juan M Alba, Robert C Schuurink, Merijn R Kant, Arne Janssen
Plants possess various inducible defences that result in synthesis of specialized metabolites in response to herbivory, which can interfere with the performance of herbivores of the same and other species. Much less is known of the effects of plant feeding by omnivores. We found that previous feeding of the omnivorous predator Macrolophus pygmaeus on sweet pepper plants significantly reduced reproduction of the two-spotted spider mite Tetranychus urticae and western flower thrips Frankliniella occidentalis on the same plants, also on leaves that had not been exposed to the omnivore...
November 9, 2017: Oecologia
https://www.readbyqxmd.com/read/29122986/identification-of-dehydrogenases-involved-in-the-biosynthesis-of-the-monoterpene-moiety-of-pyrethrin
#17
Haiyang Xu, Gaurav D Moghe, Krystle Wiegert-Rininger, Anthony L Schilmiller, Cornelius S Barry, Robert L Last, Eran Pichersky
Flowers of Tanacetum cinerariifolium produce a set of compounds known collectively as pyrethrins, which are commercially important pesticides that are strongly toxic to flying insects but not to most vertebrates. A pyrethrin molecule is an ester consisting of either trans-chrysanthemic acid or its modified form, pyrethric acid, and one of three alcohols - jasmolone, pyrethrolone, and cinerolone - that appear to be derived from jasmonic acid. Chrysanthemyl diphosphate synthase (CDS), the first enzyme involved in the synthesis of trans-chrysanthemic acid, was previously characterized and its gene isolated...
November 9, 2017: Plant Physiology
https://www.readbyqxmd.com/read/29120764/effects-of-a-combination-of-elicitation-and-precursor-feeding-on-grape-amino-acid-composition-through-foliar-applications-to-garnacha-vineyard
#18
Gastón Gutiérrez-Gamboa, Javier Portu, Rosa López, Pilar Santamaría, Teresa Garde-Cerdán
Vine foliar applications of phenylalanine (Phe) or methyl jasmonate (MeJ) could improve the synthesis of secondary metabolites. However, there are no reports focusing on the effects of elicitation supported by precursor feeding on must amino acid composition in grapevines. The aim of this research was to study the effect of the elicitation of methyl jasmonate (MeJ) supported by phenylalanine (Phe) as a precursor feeding (MeJ+Phe) and its application individually on must amino acid composition. Results showed that foliar Phe and MeJ treatments decreased the concentration of most of the studied amino acids with respect to the control (p≤0...
April 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29116400/effect-of-salt-stress-on-fatty-acid-and-%C3%AE-tocopherol-metabolism-in-two-desert-shrub-species
#19
Xiaolong Chen, Lijing Zhang, Xiumei Miao, Xiaowei Hu, Shuzhen Nan, Jing Wang, Hua Fu
Compared to Artemisia ordosiea Kraschen, a higher content of α-tocopherol in Artemisia sphaerocephala Kraschen under salt stress inhibits the conversion of linoleic acid (C18:2) into linolenic acid (C18:3), maintains cell membrane stability and contributes to higher salt resistance. Artemisia sphaerocephala Kraschen and Artemisia ordosiea Kraschen are widely distributed in the arid and semiarid desert regions of the northwest of China. Under salt stress, it has been known that α-tocopherol (α-T) improves membrane permeability and maintains Na(+)/K(+) homeostasis; however, the function of α-T in regulating membrane components of fatty acids is unknown...
November 7, 2017: Planta
https://www.readbyqxmd.com/read/29114014/arabidopsis-pollen-fertility-requires-the-transcription-factors-cit1-and-spl7-that-regulate-copper-delivery-to-anthers-and-jasmonic-acid-synthesis
#20
Jiapei Yan, Ju-Chen Chia, Huajin Sheng, Ha-Il Jung, Tetiana-Olena Zavodna, Zhang Lu, Rong Huang, Chen Jiao, Eric Craft, Zhangjun Fei, Leon Vincent Kochian, Olena K Vatamaniuk
A deficiency of the micronutrient copper (Cu) leads to infertility and grain/seed yield reduction in plants. How Cu affects fertility, which reproductive structures require Cu, and which transcriptional networks coordinate Cu delivery to reproductive organs is poorly understood. Using RNA-seq analysis, we showed that the expression of a gene encoding a novel transcription factor, CITF1 (Cu-deficiency Induced Transcription Factor 1), was strongly upregulated in Arabidopsis thaliana flowers subjected to Cu deficiency...
November 7, 2017: Plant Cell
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