Cell wall-conjugated phenolics from coniferae leaves

Strack, Dieter; Heilemann, Jürgen; Mömken, Martina; Wray, Victor

doi:10.1016/0031-9422(88)80759-3

Cited by 93 publications

(70 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…spectra between fractions containing the peaks of interest and standards (fi-coumaric acid: /\^,,,, 310nm, A^h300nm; ferulic acid: A^j^^ 322 nm, A^,, 300 nm). The quantities and ratio of these hydroxycinnamic acids were similar to those reported by Strack et al (1988) for a number of Piniis species. In response to O^, the average concentration of ^-coumaric acid was slightly lower (10''o).…”

Section: Effects Of O3 On Bound Hydroxycinnamic Acids and Ligninsupporting

confidence: 86%

“…Histological studies of Os-treated spruce needles suggested that walls of guard and subsidiary cells became delignified through reactions with O3 (ozonolysis), although insoluble non-lignin phenolic compounds accumulated there (Maier-Maercker & Koch, 1992). The ceil walls of many conifer needles contain insoluble conjugated bydroxycinnamic acids (p-coumaric and ferulic acids) and the flavonol kaempferol 3-0-glucoside (Strack et al, 1988). However, Bonello et al (1993) reported tbat O3 had no consistent effect on tbe level of wall-bound p-coumaric acid in needles of Scots pine seedlings.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Catechin, proanthocyanidin and lignin contents of loblolly pine (Pinus taeda) needles after chronic exposure to ozone

1996

View full text Add to dashboard Cite

SUMMARYConcentrations of soluble and bound phenolic cotnpounds were measured in needles of 3-yr-old loblolly pme {Pinus taeda L.) trees exposed from May to November 1993 to a range of ozone (O3) concentrations in open-top fidd chambers. The treatments were charcoal-filtered air (CF). non-filtered air (NF), and NF air with O, added at 1-5 times (NF 1-5) and 2-0 times (NF 2-0) the ambient O, concentration for 12 h daily. Average daily (0800-2000 hours) O3 concentrations in the CF.NF, NF ISandNF 2 0 treatments were r. 29, 47, 76 and 98 nl 1"', respectively, for the 140 d treatment period. At tbe end of the treatment period, total phenolic and proanthoc\anidin concentrations in the previous year's needles were 25-29'\, higher in the NF 2'0 treatment compared v\ ith the lower O., treatments. Catechin concentration increased in the previous year's needles by as mucb as 81 ''" between the NF 2-0 treatment and tbe lower O^ treatments. Catechin is an effective antioxidant, and elevated levels migbt confer some protection against O^ injury. No significant differences in total phenolics and proanthocyanidins in the previous year's needles were detected among the remaining O^ treatments, or among any C>. , treatment for tbe current year's needles. Lignin content in needles of botb years was not significantly affected by O,j exposure. Changes in the phenolic content of older needles in response to elevated O^ could alter plant-patbogen interactions and slow down microbial decomposition, which could contribute to a decline in site soil quality.

show abstract

Section: Effects Of O3 On Bound Hydroxycinnamic Acids and Ligninsupporting

confidence: 86%

mentioning

confidence: 99%

Catechin, proanthocyanidin and lignin contents of loblolly pine (Pinus taeda) needles after chronic exposure to ozone

1996

View full text Add to dashboard Cite

show abstract

“…to Me 4 Si as internal standard, J in Hz). The 1 H-and 13 C-NMR data of isolated compounds were identical with those of kaempferol 3-O-rhamnoside [10], quercetin-O-rhamnoside [4,5], and myricetin 3-O-rhamnoside [6] (Fig. 1).…”

supporting

confidence: 56%

First phytochemical investigation of secondary metabolites ofEuphorbia davidiiSubils. and antiproliferative activity of its extracts

Rédei¹,

Kúsz²,

Szabó³

et al. 2015

Acta Biologica Hungarica

View full text Add to dashboard Cite

The present work is the first phytochemical investigation of Euphorbia davidii Subils. After multistep separation process, three flavonoid glycosides were obtained from the ethyl acetate soluble fraction of the methanol extract of the whole plant. The structures of the isolated compounds were determined as kaempferol 3-O-rhamnoside, myricetin 3-O-rhamnoside, and quercetin 3-O-rhamnoside. Aqueous and organic extracts of the plant were screened in vitro for antiproliferative activity against HeLa (cervix epithelial adenocarcinoma), A431 (skin epidermoid carcinoma), A2780 (ovarian carcinoma) and MCF7 (breast epithelial adenocarcinoma) cells, using the MTT assay. n-Hexane and chloroform extracts demonstrated moderately dose-dependent cell growth inhibitory activity against all four cell lines.

show abstract

“…Consistent with this idea, blackening of the epidermis after severe light stress is frequently observed in many species in the field, a phenomenon that has been ascribed to the polymerization of vacuolar phenolics as the result of the penetration of H,O, into epidermal cells. In Pinaceae species hydrophilic flavono1 glycosides are found in the cell wall (Strack et al, 1988), where GuPXs are also present (Takahama, 1993). The possibility that the apoplastic flavonoid-GuPX may participate in H,O, scavenging (Takahama and Oniki, 1992) cannot be excluded from Figure 6.…”

Section: Flavonoids As Stress Protectantsmentioning

confidence: 99%

Flavonoid-Peroxidase Reaction as a Detoxification Mechanism of Plant Cells against H2O2

1997

View full text Add to dashboard Cite

Cell wall-conjugated phenolics from coniferae leaves

Cited by 93 publications

References 15 publications

Catechin, proanthocyanidin and lignin contents of loblolly pine (Pinus taeda) needles after chronic exposure to ozone

Catechin, proanthocyanidin and lignin contents of loblolly pine (Pinus taeda) needles after chronic exposure to ozone

First phytochemical investigation of secondary metabolites ofEuphorbia davidiiSubils. and antiproliferative activity of its extracts

Flavonoid-Peroxidase Reaction as a Detoxification Mechanism of Plant Cells against H2O2

Contact Info

Product

Resources

About