Wheat leaf resistance to Pyrenophora tritici-repentis induced by silicon activation of phenylpropanoid metabolism

2018 ◽  
Vol 67 (8) ◽  
pp. 1713-1724 ◽  
Author(s):  
K. R. Dorneles ◽  
P. C. Pazdiora ◽  
J. F. Hoffmann ◽  
F. C. Chaves ◽  
L. G. Monte ◽  
...  
Keyword(s):  
Phenylpropanoid Metabolism ◽  
Pyrenophora Tritici Repentis ◽  
Leaf Resistance ◽  
Wheat Leaf

scholarly journals Distribution and Pathogenic Characterization of Pyrenophora tritici-repentis and Stagonospora nodorum in Ohio

2006 ◽  
Vol 96 (12) ◽  
pp. 1355-1362 ◽  
Author(s):  
Jessica S. Engle ◽  
Laurence V. Madden ◽  
Patrick E. Lipps
Keyword(s):  
Linear Analysis ◽  
The Other ◽  
Stagonospora Nodorum ◽  
Pyrenophora Tritici Repentis ◽  
Logistic Analysis ◽  
Wheat Leaf ◽  
Race 1 ◽  
Race 2 ◽  
Log Linear

To determine the distribution of Stagonospora nodorum and Pyrenophora tritici-repentis on wheat in Ohio, flag leaves with lesions were collected from wheat-producing counties in 2002 and 2003. Counties were arbitrarily grouped into seven regions. Log-linear analysis of pathogen presence within regions indicated that the presence of S. nodorum was independent of the presence of P. tritici-repentis. A logistic analysis revealed that the occurrence of both pathogens varied by region in one or both years. The aggressiveness of S. nodorum isolates was determined by inoculating two susceptible genotypes with a subsample of isolates from each region from both years. S. nodorum isolates obtained from northeast Ohio, with fewer wheat fields, were less aggressive than those from other regions. Isolates obtained from west-central Ohio, surrounded by regions with high wheat production annually, were significantly more aggressive than those obtained in the remaining five regions. Isolates from the five other regions did not differ significantly (P > 0.05) in aggressiveness. Races 1 and 2, and a few race 3 isolates, of P. tritici-repentis were detected in Ohio. The distribution of P. tritici-repentis races 1 and 2 was not associated with any region, although the prevalence of race 1 was three times greater than race 2. The rarer race 3 was associated with three dispersed regions. Results indicate that S. nodorum was the major wheat leaf-blotching pathogen. There were no positive or negative associations of S. nodorum and P. tritici-repentis or individual races of P. tritici-repentis in any of the tested regions, which indicates that neither pathogen can be used to predict the presence of the other. The isolated northeastern corner of Ohio appeared to contain isolates of S. nodorum with unique characteristics and potentially only one race of P. tritici-repentis, indicating that this area may be genetically isolated from the remaining tested areas of the state.

scholarly journals Races of Pyrenophora tritici-repentis in the Czech Republic

2012 ◽  
Vol 58 (1) ◽  
pp. 73-78 ◽  
Author(s):  
J. Šárová ◽  
A. Hanzalová ◽  
P. Bartoš
Keyword(s):  
Czech Republic ◽  
Leaf Spot ◽  
Tan Spot ◽  
Grass Species ◽  
The Czech Republic ◽  
Pyrenophora Tritici Repentis ◽  
Wheat Leaf ◽  
Race 1 ◽  
Race 4 ◽  
Different Parts

<i>Pyrenophora tritici</i>-<i>repentis</i>, causal agent of tan spot, is one of the most important wheat leaf spot pathogens worldwide. The race structure of <i>P. tritici</i>-<i>repentis</i> isolates obtained from wheat (except one from noncereal grass species) in the Czech Republic was studied. The 86 monosporic isolates of <i>P. tritici</i>-<i>repentis</i> originated from different parts of the Czech Republic were grouped into five known races based on necrosis/chlorosis induction on standard differentials (Katepwa, Glenlea, 6B365, Salamouni). The isolates recovered from wheat were races 1, 2 and 4. Race 1 was the most frequent (50%), races 2 and 4 were found rarely (3% and 5% respectively). The isolate of <i>P. tritici</i>-<i>repentis</i> recovered from noncereal grass species was determined as race 4 which seems to be typical for noncereal hosts. The reaction of 30 isolates (42%) was difficult to be compared to reactions of so far identified <i>P. tritici</i>-<i>repentis</i> races. They have to be tested again on additional wheat genotypes.

Inhibition of photosynthesis and modification of the wheat leaf proteome by Ptr ToxB: A host-specific toxin from the fungal pathogen Pyrenophora tritici-repentis

PROTEOMICS ◽  
2010 ◽  
Vol 10 (16) ◽  
pp. 2911-2926 ◽  
Author(s):  
Yong Min Kim ◽  
Noureddine Bouras ◽  
Nat N. V. Kav ◽  
Stephen E. Strelkov
Keyword(s):  
Fungal Pathogen ◽  
Pyrenophora Tritici Repentis ◽  
Wheat Leaf ◽  
Leaf Proteome

Hyperspectral Analysis of Wheat Leaf Rust (WLR) Disease A Review

2018 ◽  
Vol 6 (1) ◽  
pp. 215-219 ◽  
Author(s):  
M.K. Maid ◽  
◽  
R.R. Deshmukh ◽  
Keyword(s):  
Leaf Rust ◽  
Wheat Leaf Rust ◽  
Wheat Leaf

Diagnosis Tsn1 gene of Pyrenophora tritici-repentis in wheat varieties and their resistance to races of the pathogen

2018 ◽  
Vol 1 (72) ◽  
pp. 206-210
Author(s):  
Oksana Kremneva ◽  
◽  
Galina Volkova ◽  
Keyword(s):  
Wheat Varieties ◽  
Pyrenophora Tritici Repentis

scholarly journals Study on browning mechanism of fresh-cut eggplant (Solanum melongena L.) based on metabolomics, enzymatic assays and gene expression

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Xiaohui Liu ◽  
Aidong Zhang ◽  
Jing Shang ◽  
Zongwen Zhu ◽  
Ye Li ◽  
...  
Keyword(s):  
Gene Expression ◽  
Fruits And Vegetables ◽  
Solanum Melongena ◽  
Downward Trend ◽  
Glutathione Metabolism ◽  
Phenylpropanoid Metabolism ◽  
Kegg Pathways ◽  
Maximum Value ◽  
Cut Time ◽  
Fresh Cut

AbstractEnzymatic browning is one of the crucial problems compromising the flavor and texture of fresh-cut fruit and vegetables. In this study, an untargeted metabolomics approach based on liquid chromatography-mass spectrometry (LC–MS) was used to explore the browning mechanism in fresh-cut eggplant. Metabolomics studies showed that with the increase of fresh-cut time, the contents of 946 metabolites changed dynamically. The metabolites having the same trend share common metabolic pathways. As an important browning substrate, the content of chlorogenic acid increased significantly, suggesting that may be more important to fresh-cut eggplant browning; all 119 common differential metabolites in 5 min/CK and 3 min/CK contrastive groups were mapped onto 31 KEGG pathways including phenylpropanol metabolism, glutathione metabolism pathway, et al. In physiological experiments, results showed that the Phenylpropanoid-Metabolism-Related enzymes (PAL, C4H, 4CL) were changed after fresh-cut treatment, the activities of three enzymes increased first and then decreased, and reached the maximum value at 5 min, indicating the accumulation of phenolic substances. At the same time, ROS were accumulated when plant tissue damaged by cutting, the activities of related antioxidant enzymes (SOD, APX and CAT) changed dynamically after oxidative damage. SOD and APX content increased significantly and reached the maximum value at 10 min after cutting, and then showed a downward trend. However, CAT activity increased sharply and reached the maximum value within 3 min after cutting, then maintained the same activity, and showed a downward trend after 30 min. These data fully demonstrated that the activities of browning related enzymes and gene expression increased with the prolonging of fresh cutting time. We explained the browning mechanism of fresh-cut eggplant by combining metabolomics and physiology, which may lay the foundation for better understanding the mechanism of browning during the fruits and vegetables during processing.

A R2R3-MYB transcriptional activator LmMYB15 regulates chlorogenic acid biosynthesis and phenylpropanoid metabolism in Lonicera macranthoides

Plant Science ◽  
2021 ◽  
Vol 308 ◽  
pp. 110924
Author(s):  
Ning Tang ◽  
Zhengyan Cao ◽  
Cheng Yang ◽  
Dongsheng Ran ◽  
Peiyin Wu ◽  
...  
Keyword(s):  
Chlorogenic Acid ◽  
Transcriptional Activator ◽  
Phenylpropanoid Metabolism ◽  
Acid Biosynthesis ◽  
Lonicera Macranthoides ◽  
R2r3 Myb

scholarly journals R2R3-MYB transcription factors, StmiR858 and sucrose mediate potato flavonol biosynthesis

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Sen Lin ◽  
Rajesh K. Singh ◽  
Moehninsi ◽  
Duroy A. Navarre
Keyword(s):  
Gene Expression ◽  
Abiotic Stress ◽  
Feedback Loop ◽  
Regulatory Mechanisms ◽  
Phenylpropanoid Metabolism ◽  
Biotic And Abiotic Stress ◽  
Health Promoting ◽  
Transient Overexpression ◽  
R2r3 Myb ◽  
R2r3 Myb Transcription Factors

AbstractFlavonols and other phenylpropanoids protect plants from biotic and abiotic stress and are dietarily desirable because of their health-promoting properties. The ability to develop new potatoes (Solanum tuberosum) with optimal types and amounts of phenylpropanoids is limited by lack of knowledge about the regulatory mechanisms. Exogenous sucrose increased flavonols, whereas overexpression of the MYB StAN1 induced sucrolytic gene expression. Heterologous StAN1 protein bound promoter fragments from sucrolytic genes (SUSY1 and INV1). Two additional MYBs and one microRNA were identified that regulated potato flavonols. Overexpression analysis showed MYB12A and C increased amounts of flavonols and other phenylpropanoids. Endogenous flavonol amounts in light-exposed organs were much higher those in the dark. Expression levels of StMYB12A and C were high in flowers but low in tubers. Transient overexpression of miR858 altered potato flavonol metabolism. Endogenous StmiR858 expression was much lower in flowers than leaves and correlated with flavonol amounts in these organs. Collectively, these findings support the hypothesis that sucrose, MYBs, and miRNA control potato phenylpropanoid metabolism in a finely tuned manner that includes a feedback loop between sucrose and StAN1. These findings will aid in the development of potatoes with phenylpropanoid profiles optimized for crop performance and human health.

Long‐term fertilization regimes influence the diversity and community of wheat leaf bacterial endophytes

2021 ◽  
Author(s):  
Zhan‐Bin Sun ◽  
Hai‐Yan Li ◽  
Zhi‐An Lin ◽  
Liang Yuan ◽  
Jiu‐Kai Xu ◽  
...  
Keyword(s):  
Bacterial Endophytes ◽  
Wheat Leaf

Effects of cuticular wax content and specific leaf area on accumulation and partition of PAHs in different tissues of wheat leaf

2020 ◽  
Vol 27 (15) ◽  
pp. 18793-18802
Author(s):  
Jinfeng Wang ◽  
Huanyu Bao ◽  
He Zhang ◽  
Jiao Li ◽  
Huachang Hong ◽  
...  
Keyword(s):  
Leaf Area ◽  
Specific Leaf Area ◽  
Cuticular Wax ◽  
Wheat Leaf ◽  
Wax Content ◽  
Different Tissues
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