Phenolic Components of the Plant Cell Wall

Wallace, Graham; Fry, Stephen C.

doi:10.1016/s0074-7696(08)62634-0

Cited by 199 publications

(121 citation statements)

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“…A consensus emerged that walls were built of two independent networks, cross-linked cellulose microfibrils and cross-linked pectin, each with distinct physical and mechanical properties (3). The nature of the cross-links in both cases has been slow to emerge but most contributions here have come from Stephen Fry's (Edinsburgh University, Scotland) thorough biochemical approach (18). The relative contributions of each network to the mechanical properties of the wall have been greatly clarified by the exploitation of a beautiful in vitro system that uses Acetobacter xylinum as a source of cellulose microfibrils to mimic the self-assembly of the higher plant cell wall (19).…”

Section: The Importance Of Wall Architecturementioning

confidence: 99%

How the Cell Wall Acquired a Cellular Context

Roberts

2001

Plant Physiology

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Section: The Importance Of Wall Architecturementioning

confidence: 99%

How the Cell Wall Acquired a Cellular Context

Roberts

2001

Plant Physiology

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“…Phenolic compounds play an important role in plant defence mechanisms against invading bacteria and other types of environmental stress, such as wounding and excessive light or ultraviolet radiation [31,32]. These compounds can act as antioxidants by chelating metal ions, preventing radical formation and improving the antioxidant endogenous system [33].…”

Section: Discussionmentioning

confidence: 99%

Screening of phytochemical and pharmacological activities of Syzygium caryophyllatum (L.) Alston

Nadarajan

2018

Clin Phytosci

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Background: The systematic screening of plant species with the purpose of discovering new bioactive compounds is prerequisite for any bioprospecting study. Therefore the present study was carried out to assess the phytochemical content and the evaluation of in vitro antioxidant, antibacterial, larvicidal and antidiabetic activities of the methanol extracts of S.caryophyllatum bark, leaves, fruit pulp and seeds. Methods: The quantitative estimation of total phenol, flavonoid and tannin content of the extracts of S. caryophyllatum bark, leaf, fruit pulp and seeds were analyzed by using standard methods. The present study also conducted to screen antioxidant (DPPH, ABTS assays), antimicrobial, antidiabetic (in vitro α-amylase and α-glucosidase inhibitory assays) and larvicidal (against fourth instars larvae of Aedes aegypti and Culex quinquefasciatus) activities of methanol extract of S. caryophyllatum.

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“…Phenolic acids provide the precursors for lignin, tannins, and fl avonoid biosynthesis (Hrazdina, 1992;Heller and Forkmann, 1994). In species of Agave, which do not accumulate relevant amounts of foliar lignin neither tannins (Wall et al, 1957;Seigler, 2002), phenolic acids could have several other functions, like protection against herbivores and pathogens, action as cementing material joining phenolic polymers to polysaccharides of cell walls (Wallace and Fry, 1994), participation in the regulation of cell growth and division (Binns et al, 1987), inhibition of ion intake by a generalized increase in membrane permeability to inorganic ions as a mode of action of allelopathic compounds (Glass and Dunlop, 1974), protection to thermal stress (Dixon and Paiva, 1995), and function as antioxidants (Rice-Evans et al, 1997;Almaraz-Abarca et al, 2007) Table 2). The predominance of phenolic acids in A. victoriae-reginae s.l.…”

Section: Discussionmentioning

confidence: 99%

Variability of the Foliar Phenol Profiles of the Agave victoriae-reginae Complex (Agavaceae).

Almaraz-Abarca¹,

González-Elizondo²,

Campos³

et al. 2013

Bot. Sci.

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Abstract:The foliar phenol profi les of eight populations of the Agave victoriae-reginae complex were determined by high performance liquid chromatography with diode array detection in order to assess the variability of those compounds across the natural distribution of the complex, and to determine their taxonomical signifi cance. With comparative aims Agave lechuguilla and A. striata were analyzed in the same manner. A total of 81 phenolic compounds were detected, comprising 18 phenolic acids, 51 fl avonoids (26 fl avonols, 19 dihydrovonoids, and six fl avones), and 12 non identifi ed phenols. Each population of the A. victoriaereginae complex showed a different foliar phenol composition, and A. pintilla, the most recently described species of the group, could be distinguished by four compounds not shared with any other analyzed population. Phenolic acids were detected in all taxa. However, a higher proportion of those compounds was found in the A. victoriae-reginae complex, while a predominance of fl avonols (quercetin-3-O-glycosides) was found in A. striata, and a codominance of dihydrofl avonoids and fl avonols in A. lechuguilla, allowing to distinguish species-specifi c profi les. Differences in the contents of some phenolic compounds among those three species and within the A. victoriae-reginae complex were also found. Our results sustain the proposal of considering A. victoriaereginae as a species complex and the separation of A. pintilla as an independent species. The results also reveal the foliar phenol patterns as valuable chemical markers in Agave. Key words: Agave lechuguilla, Agave striata, Agave victoriae-reginae, chemical variability, phenol profi les.Resumen: Se determinaron los perfi les fenólicos foliares de ocho poblaciones del complejo Agave victoriae-reginae por medio de cromatografía líquida de alta resolución con detector de arreglo de diodos para evaluar la variabilidad de esos compuestos a través de la distribución natural del complejo, y para determinar su valor taxonómico. Con fi nes comparativos Agave lechuguilla y Agave striata se analizaron de la misma manera. Se encontró un total de 81 compuestos fenólicos, que incluyeron 18 ácidos fenólicos, 51 fl avonoides (26 fl avonoles, 19 dihidrofl avonoides y seis fl avonas), además de 12 compuestos fenólicos no identifi cados. Cada población del complejo A. victoriae-reginae presentó una composición fenólica foliar diferente, y A. pintilla, la especie más recientemente descrita del grupo, se pudo distinguir por cuatro compuestos no compartidos con ninguna otra población analizada. En todos los taxa se detectaron ácidos fenólicos; sin embargo, una predominancia de estos compuestos se encontró en el complejo A. victoriae-reginae, mientras que en A. striata se encontró predominancia de fl avonoles (derivados de quercetina), y en A. lechuguilla una codominancia de dihidrofl avonoides y fl avonoles, lo que permitió discernir perfi les especie-específi cos. Diferencias en los contenidos de algunos compuestos fenólicos entre estas tres especies ...

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Phenolic Components of the Plant Cell Wall

Cited by 199 publications

References 155 publications

How the Cell Wall Acquired a Cellular Context

How the Cell Wall Acquired a Cellular Context

Screening of phytochemical and pharmacological activities of Syzygium caryophyllatum (L.) Alston

Variability of the Foliar Phenol Profiles of the Agave victoriae-reginae Complex (Agavaceae).

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