ChemInform Abstract: Role of Phenolics in Plant Evolution.

Cooper‐Driver, Gillian; Bhattacharya, Madhumita

doi:10.1002/chin.199910249

Cited by 25 publications

(26 citation statements)

References 1 publication

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“…In response to changing environmental conditions, plants evolved the capacity to biosynthesize different phenolic acids (Cooper-Driver and Bhattacharya 1998;Bieza and Lois 2001;Caldwell et al 2007). In the present study, three phenolic acids were identified in V. vinifera leaves and roots: caffeic, p-coumaric and ferulic.…”

Section: Discussionmentioning

confidence: 99%

Changes in the composition of phenolic compounds and antioxidant properties of grapevine roots and leaves (Vitis vinifera L.) under continuous of long-term drought stress

2014

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Grapevine seedlings Vitis vinifera L. were grown in a greenhouse under optimum conditions (soil moisture ca 70 %) and under drought stress (soil moisture ca 30 %). Drought stress caused reduction in total phenolic compounds in grapevine leaves and roots, where were identified tree phenolic acids: caffeic acid, p-coumaric acid and ferulic acid. All acids found in leaves and roots occurred in the ester-bound form. Only caffeic acid in leaves appeared in the free and ester-bound form. Caffeic acid was present in the highest concentrations. The content of ferulic acid was the lowest in both tissues. The levels of all phenolic acids in leaves and roots decreased significantly under the drought stress. All the extracts from grapevine leaves and roots had antioxidative properties, but the antiradical activity of the extracts obtained from roots subjected to drought stress was lower to the control. The results of the analysis revealed that long-term drought stress caused a decrease in selected elements of secondary metabolism in such a different plant tissues that are the leaves and roots of the grapevine.

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Section: Discussionmentioning

confidence: 99%

Changes in the composition of phenolic compounds and antioxidant properties of grapevine roots and leaves (Vitis vinifera L.) under continuous of long-term drought stress

2014

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“…Thus, phenylpropanoids lead to a large variety of compounds with diverse functions, including antimicrobial compounds (phytoalexins) and antioxidant protectants (various flavonoid compounds), signal molecules (SA), and structural components (precursors of lignin). This secondary metabolism then can be involved in the restriction of the invading pathogen in several ways, such as direct pathogen death, balance of the oxidative status, reinforcement of the plant cell wall, and elicitation of SAR [22][23][24].…”

Section: Resultsmentioning

confidence: 99%

Molecular Profiling of Systemic Acquired Resistance (SAR)-Responsive Transcripts in Sugarcane Challenged with Colletotrichum falcatum

Selvaraj

Ashwin

Sundar

et al. 2014

Appl Biochem Biotechnol

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Red rot disease of sugarcane caused by Colletotrichum falcatum is one of the serious constraints affecting the productivity of the crop. The strategy of employing systemic acquired resistance (SAR) against red rot yielded consistently good results at field level. However, elucidation of genes involved in the induction of SAR continues to be a challenging area of research for a critical understanding of red rot disease resistance in sugarcane. Here, temporal expression of 22 putative defense-related genes were analyzed by semiquantitative reverse transcription-PCR (RT-PCR) in red rot-susceptible cultivar (CoC 671) with response to priming using various SAR inducers, viz. benzothiadiazole (BTH), salicylic acid (SA), and C. falcatum elicitor. Among the 22 genes studied, 12 transcripts were found to be differentially expressed, of which seven transcripts represent phenylpropanoid pathway and five transcripts represent resistant gene analogues (RGAs). Differentially regulated phenylpropanoid pathway genes such as cinnamic acid 4-hydroxylase, 4-coumarate:coenzyme A ligase, chalcone synthase, and chalcone reductase were reported to play a major role in the regulation of phytoalexin synthesis, whereas R genes such as NBS-LRR genes and basal layer antifungal peptide (BAF) genes were upregulated upon SAR induction in response to pathogen challenge. These upregulated genes presumably play a potential role in SAR induction and might contribute to defense against C. falcatum.

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“…Therefore, quercetin glycosides should exhibit the highest antioxidant activity in soybean leaves. However, the antioxidant function of flavonoids is complex and depends on various factors, including intracellular compartmentalization, redox potential, presence of double bonds, glycosylation and hydroxylation (Bors et al 1995;Rice-Evans et al 1996;Cooper-Driver and Bhattacharya 1998). Further studies are required to evaluate antioxidant activity of flavonoids in soybean.…”

Section: Discussionmentioning

confidence: 99%

Difference in chilling-induced flavonoid profiles, antioxidant activity and chilling tolerance between soybean near-isogenic lines for the pubescence color gene

et al. 2010

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Chilling tolerance is an important trait of soybeans [Glycine max (L.) Merr.] produced in cool climates. We previously isolated a soybean flavonoid 3' hydroxylase (F3'H) gene corresponding to the T locus, which controls pubescence and seed coat color. A genetic link between the T gene and chilling tolerance has been reported, although the exact underlying mechanisms remain unclear. Using the soybean near-isogenic lines (NILs) To7B (TT) and To7G (tt), we examined the relationship between chilling injury, antioxidant activity and flavonoid profiles associated with chilling treatment (15°C). Chilling injury was more severe in the second trifoliate leaves of To7G than in those of To7B. Hydrogen peroxide accumulation and lipid peroxidation were enhanced by chilling in To7G. Chilling-induced enhancement of antioxidant activity was more prominent in To7B than in To7G. High performance liquid chromatography analysis indicated that the contents of quercetin glycosides and isorhamnetin glycosides (3',4'-dihydroxylated flavonol derivatives) increase in the second trifoliate leaves of To7B after chilling treatment, whereas the same treatment increased kaempferol glycoside (4'-monohydroxylated flavonol derivatives) content in the corresponding leaves of To7G. Histochemical staining also demonstrated chilling-induced flavonoid accumulation. Microarray analysis and real-time reverse transcription-PCR demonstrated that the transcript levels of soybean F3'H are upregulated by chilling. The differences in chilling injury, antioxidant activity and flavonoid species between the two NILs support the notion that soybean F3'H affects chilling tolerance by increasing antioxidant activity via production of 3',4'-dihydroxylated flavonol derivatives.

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ChemInform Abstract: Role of Phenolics in Plant Evolution.

Cited by 25 publications

References 1 publication

Changes in the composition of phenolic compounds and antioxidant properties of grapevine roots and leaves (Vitis vinifera L.) under continuous of long-term drought stress

Changes in the composition of phenolic compounds and antioxidant properties of grapevine roots and leaves (Vitis vinifera L.) under continuous of long-term drought stress

Molecular Profiling of Systemic Acquired Resistance (SAR)-Responsive Transcripts in Sugarcane Challenged with Colletotrichum falcatum

Difference in chilling-induced flavonoid profiles, antioxidant activity and chilling tolerance between soybean near-isogenic lines for the pubescence color gene

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