Inhibition of phenylalanine ammonia-lyase suppresses the resistance induced by benzothiadiazole in wheat to Blumeria graminis f. sp. tritici

Stadnik, Marciel J.; Buchenauer, H.

doi:10.1006/pmpp.2000.0276

Cited by 112 publications

(64 citation statements)

References 24 publications

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“…(Yuan et al, 2013). 이러한 정 량 및 정성분석의 복잡성 문제를 해결하기 위한 하나의 대 안으로 ultraviolet-visible(UV-VIS) spectrophotometer를 이 용한 기능성 성분들의 신속한 함량 조사가 가능함이 보고되 고 있다 (Kofalvi and Nassuth, 1995;Stadnik and Buchenauer, 2000;Zhishen et al, 1999). (Bastiena et al, 2005;Höskuldsson, 1988;Mevik and Wehrens, 2007;Wold et al, 2001).…”

Section: 서 언unclassified

Discrimination of African Yams Containing High Functional Compounds Using FT-IR Fingerprinting Combined by Multivariate Analysis and Quantitative Prediction of Functional Compounds by PLS Regression Modeling

Song¹,

Jie²,

Ahn³

et al. 2014

HST

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We established a high throughput screening system of African yam tuber lines which contain high contents of total carotenoids, flavonoids, and phenolic compounds using ultraviolet-visible (UV-VIS) spectroscopy and Fourier transform infrared (FT-IR) spectroscopy in combination with multivariate analysis. The total carotenoids contents from 62 African yam tubers varied from 0.01 to 0.91 μg･g -1 dry weight (wt). The total flavonoids and phenolic compounds also varied from 12.9 to 229 μg･g -1 and from 0.29 to 5.2 mg･g -1 dry wt. FT-IR spectra confirmed typical spectral differences between the frequency regions of 1,700-1,500, 1,500-1,300 and 1,100-950 cm -1 , respectively. These spectral regions were reflecting the quantitative and qualitative variations of amide I, II from amino acids and proteins (1,700-1,500 cm -1 ), phosphodiester groups from nucleic acid and phospholipid (1,500-1,300 cm ). Principal component analysis (PCA) and subsequent partial least squarediscriminant analysis (PLS-DA) were able to discriminate the 62 African yam tuber lines into three separate clusters corresponding to their taxonomic relationship. The quantitative prediction modeling of total carotenoids, flavonoids, and phenolic compounds from African yam tuber lines were established using partial least square regression algorithm from FT-IR spectra. The regression coefficients (R 2 ) between predicted values and estimated values of total carotenoids, flavonoids and phenolic compounds were 0.83, 0.86, and 0.72, respectively. These results showed that quantitative predictions of total carotenoids, flavonoids, and phenolic compounds were possible from FT-IR spectra of African yam tuber lines with higher accuracy. Therefore we suggested that quantitative prediction system established in this study could be applied as a rapid selection tool for high yielding African yam lines.

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Section: 서 언unclassified

Discrimination of African Yams Containing High Functional Compounds Using FT-IR Fingerprinting Combined by Multivariate Analysis and Quantitative Prediction of Functional Compounds by PLS Regression Modeling

Song¹,

Jie²,

Ahn³

et al. 2014

HST

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“…However, there are only few reports of it being a mechanism of biological control by live bacterial agents applied to the phylloplane (1)(2)(3). Induced resistance has been associated with numerous plant response mechanisms (11); although there is no single host response at the biochemical or genetic level that is activated by all elicitors, peroxidase activity was associated with many cases of resistance elicited by strains of PGPR (20) and saprophytic phyllosphere bacteria (1)(2)(3), as well as resistance induced by pathogens and chemicals (11,12,22). In addition to using a biochemical marker such as peroxidase activity, verification of induced resistance is dependent upon satisfying a set of criteria common to different systems of induced resistance (23,27).…”

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Induced Resistance as a Mechanism of Biological Control by Lysobacter enzymogenes Strain C3

Kilic-Ekici¹,

Yuen²

2003

Phytopathology®

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Induced resistance was found to be a mechanism for biological control of leaf spot, caused by Bipolaris sorokiniana, in tall fescue (Festuca arundinacea) using the bacterium Lysobacter enzymogenes strain C3. Resistance elicited by C3 suppressed germination of B. sorokiniana conidia on the phylloplane in addition to reducing the severity of leaf spot. The pathogen-inhibitory effect could be separated from antibiosis by using heat-inactivated cells of C3 that retained no antifungal activity. Application of live or heat-killed cells to tall fescue leaves resulted only in localized resistance confined to the treated leaf, whereas treatment of roots resulted in systemic resistance expressed in the foliage. The effects of foliar and root applications of C3 were long lasting, as evidenced by suppression of conidial germination and leaf spot development even when pathogen inoculation was delayed 15 days after bacterial treatment. When C3 population levels and germination of pathogen conidia was examined on leaf segments, germination percentage was reduced on all segments from C3-treated leaves compared with segments from non-treated leaves, but no dose-response relationship typical of antagonism was found. Induced resistance by C3 was not host or pathogen specific; foliar application of heat-killed C3 cells controlled B. sorokiniana on wheat and also was effective in reducing the severity of brown patch, caused by Rhizoctonia solani, on tall fescue. Treatments of tall fescue foliage or roots with C3 resulted in significantly elevated peroxidase activity compared with the control.

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“…L'activation des mécanismes de défense chez la plante en réponse à la pulvérisation d'inducteurs potentiels peut être démontrée également par dosage des activités enzymatiques impliquées dans les réactions de défense du blé comme la phénylalanine ammonia lyase, les peroxydases, la cinnamoyl alcool deshydrogénase (Stadnik et Buchenauer, 2000 ;Reignault et al, 2001 ;Randoux et al, 2006 ;Renard-Merlier et al, 2007).…”

Section: Effect Of Different Concentrations Of Sh (G/l) On Mildew Infunclassified

Criblage d\'inducteurs de réactions de défense chez le blé (<i>Triticum aestivum</i>) contre l\'oïdium (<i>Blumeria graminis f.sp. tritici</i>)

Muchembled¹,

Sancholle

Sahraoui³

2009

Agronomie Africaine

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RESUMECette étude a consisté à rechercher des substances biologiques capables d'induire les défenses naturelles du blé (Triticum aestivum) contre l'oïdium (Blumeria graminis f.sp. tritici (Bgt)). Des fractions non purifiées dérivées de la plante et/ou des agents pathogènes du blé (broyats foliaires de blé ou de spores de Bgt, hydrolysat du mycélium de Septoria nodorum (Sn)) ainsi que des produits purifiés (tréhalose et salicylate d'heptanoyle (SH)) ont été testés lors d'un traitement préventif. L'intensité des protections obtenues a varié en fonction de la nature et de la concentration du produit utilisé. La protection obtenue lors de la pulvérisation du broyat foliaire de blé non infecté a été inférieure (33 %) à celle enregistrée après pulvérisation d'un broyat foliaire de blé infecté par Bgt (46 %). La protection obtenue, suite à la pulvérisation de la plante avec une suspension de spores de Bgt inactivées, a été de 44 %. La diminution d'infection enregistrée après pulvérisation d'un hydrolysat de mycélium d'un autre agent pathogène foliaire du blé (Sn) a été de 33 %. Alors que des pulvérisations préventives de tréhalose à des concentrations de 10 et 15 g/l sur des plants de blé entraînent des diminutions de l'infection de 50 à 60 %, des concentrations de 1 et 5 g/l ne permettent d'enregistrer aucune protection. La pulvérisation préventive de deux autres diholosides, le maltose et le cellobiose à 15 g/l ne permet pas de déceler une protection. Le traitement préventif du blé par le SH a permis d'obtenir une protection très forte (80 %) pour de faibles concentrations en produit (0,1 g/l). L'application de chacun des deux constituants de la molécule pris séparément induit une protection 2 fois plus faible que celle du SH avec l'acide salicylique (AS) et aucune protection avec l'acide heptanoïque (AH).Mots clés : Blé, Blumeria graminis f.sp. tritici, oïdium, inducteurs de défense naturelle, résistance acquise. ABSTRACT SCREENING OF BIOLOGICAL MOLECULES INDUCING RESISTANCE TO POWDERY MILDEW IN

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Inhibition of phenylalanine ammonia-lyase suppresses the resistance induced by benzothiadiazole in wheat to Blumeria graminis f. sp. tritici

Cited by 112 publications

References 24 publications

Discrimination of African Yams Containing High Functional Compounds Using FT-IR Fingerprinting Combined by Multivariate Analysis and Quantitative Prediction of Functional Compounds by PLS Regression Modeling

Discrimination of African Yams Containing High Functional Compounds Using FT-IR Fingerprinting Combined by Multivariate Analysis and Quantitative Prediction of Functional Compounds by PLS Regression Modeling

Induced Resistance as a Mechanism of Biological Control by Lysobacter enzymogenes Strain C3

Criblage d\'inducteurs de réactions de défense chez le blé (<i>Triticum aestivum</i>) contre l\'oïdium (<i>Blumeria graminis f.sp. tritici</i>)

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