The cell wall-bound phenolics as a biochemical indicator of soil drought resistance in winter triticale

Hura, Tomasz; Hura, Katarzyna; Ostrowska, Agnieszka; Grzesiak, Maciej T.; Dziurka, Kinga

doi:10.17221/665/2012-pse

Cited by 37 publications

(23 citation statements)

References 25 publications

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“…Aside from contributions to the antioxidant properties of the whole grain diet, phenolic compounds are believed to contribute highly toward the TAC of photosynthetic plant tissues in cereal species to better tolerate abiotic stresses (Hura, Hura, Ostrowska, Grzesiak, & Dziurka, ). In this study, eight durum wheat genotypes were studied in a controlled environment, where durum plants underwent control (12% SWC) and pre‐anthesis water‐deficit stress (6% SWC) treatments.…”

Section: Discussionmentioning

confidence: 99%

Genotype‐dependent changes in the phenolic content of durum under water‐deficit stress

et al. 2018

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Background and objectives Consumption of whole grain cereal products, which are rich in phenolic acids, is associated with lower risk of degenerative diseases. Phenolics in plants are associated with abiotic stress adaptation due to their antioxidant activities. Free, bound, and total phenolics in the wholemeal flour of 50 durum wheat (Triticum turgidum L. ssp. durum) genotypes were examined, in addition to the water stress tolerance capacity of selected genotypes. Findings This study revealed significant variation, with wholemeal flour from “Purple Grain” having the highest total phenolic content (391.0 mg gallic acid equivalent per 100 g of dry weight [GAE/100 g DW]). Under water‐deficit stress, the stress‐tolerant genotype Tamaroi had higher total phenolic content in the leaf (2880.3 mg GAE/100 g DW) compared to stress‐sensitive genotypes EGA Bellaroi and Tjilkuri (2292.6 and 2450.1 mg GAE/100 g DW, respectively). In the mature grains, stress‐tolerant genotypes Tamaroi and Yawa had significantly higher total phenolic content under stress compared to the control, while no significant change was found in the stress‐sensitive genotypes EGA Bellaroi and Tjilkuri. Conclusions Results suggest that phenolic content could be associated with water‐deficit stress tolerance. Significance and novelty Selected genotypes could now be used as parents for breeding varieties with increased phenolics and stress tolerance capacity.

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Section: Discussionmentioning

confidence: 99%

Genotype‐dependent changes in the phenolic content of durum under water‐deficit stress

et al. 2018

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“…Enzyme activity and effectiveness of non-enzymatic substances of low-molecular weight depend, inter alia, on the degree of leaf cell hydration (Hura et al 2012(Hura et al , 2013. During the experiment, the leaves of all winter oilseed rape seedlings showed a similar level of LWC (Fig.…”

Section: Lwcmentioning

confidence: 98%

“…It was shown that increased content of cell wall phenolics was one of the mechanisms facilitating an adaptation to abiotic and biotic stress factors (Wakabayashi et al 1997;El Modafar & El Boustani 2001;De Ascensao et al 2003;Hura et al 2012Hura et al , 2013.…”

Section: Sph Content and Pal Activitymentioning

confidence: 99%

Effects of low-temperature hardening on the biochemical response of winter oilseed rape seedlings inoculated with the spores of Leptosphaeria maculans

Hura

Hura²,

Rapacz

et al. 2015

Biologia

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The aim of the study was to assess the effects of low-temperature hardening (2 • C) on the biochemical compounds and processes that can increase resistance of winter rape to inoculation with Leptosphaeria maculans spores. The study involved an evaluation of the entire pool of phenolic compounds, L-phenylalanine ammonia lyase (PAL) activity, excitation intensity for blue and green fluorescence, catalase (CAT) activity, respiration intensity and heat emission from leaf tissues. All the measurements were performed 24 and 72 hours after the inoculation. Low-temperature hardening, which preceded the inoculation of rape seedlings with spores of L. maculans, caused a significant increase in CAT activity and the level of phenolic compounds. The observed changes in PAL activity reflected the changes in phenolics content. The hardened plants showed a significantly higher intensity of blue fluorescence excitation at 24 and 72 hours after the inoculation, as compared to the non-hardened seedlings. Increased content of phenolic compounds and PAL and catalase activity triggered by the temperature of 2 • C and maintained for 24 hours after the inoculation, may confirm the stimulating effect of the hardening temperature. Intensified emission of blue fluorescence indicating saturation of a cell wall with phenolic compounds makes the cell wall structure less stretchy, more tight and leakproof, and thereby hinders fungal growth through plant tissue.

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“…5). Increased content of cell wall-bound phenolics is one of the defense mechanisms utilized by plants undergoing biotic (El Modafar and El Boustani 2001;De Ascensao and Dubery 2003;Mandal et al 2009b) and abiotic stresses (Wakabayashi et al 1997;Hura et al 2012Hura et al , 2013. Phenolic compounds present in the cell wall form crossbridges between the cell wall carbohydrates, binding them with ester and/or ether bonds.…”

Section: Discussionmentioning

confidence: 99%

“…It is possible to expect that accumulation of phenolic compounds in the apoplast enhances a hydrophobic nature of the cell wall, because it increases the number of hydrophobic benzene rings in its structure, thus making it less permeable to water. The hydrophobic environment of the apoplast might significantly inhibit the water transport from the symplast to the apoplast and limit the capillary transport of water within the apoplast (Hura et al 2012(Hura et al , 2013. Therefore, it should be taken into account that the hydrophobic environment of the apoplast can induce effective water management, which involves the retention of water in the symplast being the metabolically active cell structure at the cost of dead apoplast structure.…”

Section: Discussionmentioning

confidence: 99%

Carbohydrate, phenolic and antioxidant level in relation to chlorophyll a content in oilseed winter rape (Brassica napus L.) inoculated with Leptosphaeria maculans

Hura

Dziurka

et al. 2015

Eur J Plant Pathol

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The relationships between the level of chlorophyll a, and the content of soluble carbohydrates, phenolics and low molecular antioxidants in the leaves of three oilseed winter rape varieties with different resistance to Leptosphaeria maculans were determined. During pathogenesis, an increase in the content of chlorophyll a in the resistant and medium-sensitive rape varieties was observed. In these varieties, the level of chlorophyll a significantly correlated with the content of primary metabolites in the form of soluble sugars, as well as with the level of free and cell wall-bound phenolics, and lowmolecular antioxidants. In contrast, a decrease in soluble carbohydrates, observed during the pathogenesis in the susceptible variety, was accompanied by lower level of chlorophyll a and with high activity of reactive oxygen species. Significant correlations were also confirmed for the cell wall-bound phenolics and water content in the leaves of the resistant and medium-sensitive variety.

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The cell wall-bound phenolics as a biochemical indicator of soil drought resistance in winter triticale

Cited by 37 publications

References 25 publications

Genotype‐dependent changes in the phenolic content of durum under water‐deficit stress

Genotype‐dependent changes in the phenolic content of durum under water‐deficit stress

Effects of low-temperature hardening on the biochemical response of winter oilseed rape seedlings inoculated with the spores of Leptosphaeria maculans

Carbohydrate, phenolic and antioxidant level in relation to chlorophyll a content in oilseed winter rape (Brassica napus L.) inoculated with Leptosphaeria maculans

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