Foliar anthocyanins as modulators of stress signals

Hatier, Jean-Hugues B.; Gould, Kevin S.

doi:10.1016/j.jtbi.2008.04.018

Cited by 107 publications

(68 citation statements)

References 34 publications

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“…The decline being much pronounced in 'M-Yazdi' cultivar. In addition to serving in osmotic adjustment (Hughes et al 2013), anthocyanins play roles as antioxidant that scavenge H 2 O 2 to protect plants from oxidative damage (Hatier and Gould 2008). In our research, 'Ghojagh' with the highest chlorophyll content had the lowest amount of anthocyanin, whereas 'MYazdi' with the lowest chlorophyll content had the highest one.…”

Section: Discussionmentioning

confidence: 52%

Responses of pomegranate cultivars to severe water stress and recovery: changes on antioxidant enzyme activities, gene expression patterns and water stress responsive metabolites

Pourghayoumi

Rahemi

Bakhshi

et al. 2017

Physiol Mol Biol Plants

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The biochemical and molecular responses of five commercially well-known pomegranate cultivars to severe water stress were studied. The cultivars were subjected to 14-day water stress by withholding irrigation, followed by re-watering for 7 days. Results showed clear differences in metabolites contents and activities of antioxidant enzymes among various pomegranate cultivars during severe water stress and recovery. According to our results, increased accumulation of proline in pomegranate was not related to osmotic adjustment during severe water stress. Except for 'Ghojagh', leaves grown under severe water stress conditions showed symptoms of oxidative stress such as reduced chlorophyll concentration. The improved performance of 'Ghojagh' under drought stress may be associated with an efficient osmotic adjustment. The up-or down regulated expression of cytosolic glutathione reductase (cytosolic GR) and glutathione peroxidase were observed under drought conditions. Moreover, the suppressed expression of cytosolic GR was also noted. Comparatively, 'Rabab' exhibited higher antioxidant capacity and an efficient ROSscavenging mechanism under drought stress. Lower levels of membrane lipid peroxidation in 'Ghojagh' and 'Rabab' under drought stress and the marked reduction of malondialdehyde concentration after re-watering represents that these cultivars have a good tolerance to drought stress. As a first step towards the study of the biochemical and molecular responses of pomegranate plants to water stress, this research provides new information into the mechanisms of drought tolerance in the plants.

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Section: Discussionmentioning

confidence: 52%

Responses of pomegranate cultivars to severe water stress and recovery: changes on antioxidant enzyme activities, gene expression patterns and water stress responsive metabolites

Pourghayoumi

Rahemi

Bakhshi

et al. 2017

Physiol Mol Biol Plants

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“…Studies have shown that flavonoids are associated with the chloroplast envelope membrane and may limit the diffusion of reactive oxygen species out of the chloroplast [33][34][35]. It has also been shown in different plants that they are capable of quenching hydroxyl radicals, hence protecting cells against nuclear DNA damage [36,37].…”

Section: Changes In Leaf Flavonoid Distributionmentioning

confidence: 99%

Main Leaf Polyphenolic Components of Berry Color Variant Grapevines and Their Acclimative Responses to Sunlight Exposure

Kocsis

Abrankó²,

Ayaydin³

et al. 2015

Applied Sciences

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Grapevine leaf synthesizes a wide variety of bioactive secondary metabolites, including polyphenols, which are also key components in ensuring development and growth of the whole plant even under adverse environmental conditions. Our study evaluates the nonanthocyanin polyphenolic composition in grapevine leaves of three varieties of Gohér conculta (Vitis vinifera L.) native to Hungary. A high performance liquid chromatography (HPLC) system including a diode array detector (DAD) coupled to a time-of-flight mass spectrometer (q-TOFMS) was successfully applied to profile intact glycoconjugate forms in samples. In-source fragmentation was utilized in order to provide structural information on the compounds. Using this method, the presence of 16 polyphenolic metabolites were confirmed, and eight of them were subjected to further quantification in sun acclimated and half shaded leaves. Intracellular microimaging detected accumulation of flavonols in cell nuclei, cell wall and chloroplasts. Our findings demonstrated that Gohér conculta-a special grapevine taxon of our viticultural heritage with berry color variants-is a suitable model to OPEN ACCESSAppl. Sci. 2015Sci. , 5 1956 study the interaction between genetic and environmental factors in determination of grapevine phenolic composition.

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“…The susceptibility of pft1, impaired in the MED25 subunit of Mediator complex, was linked to the attenuated JA-responses including a lack of anthocyanin, an antimicrobial fl avonoid secondary metabolite (Hatier and Gould, 2008;Kidd et al, 2009;Shan et al, 2009). PFT1 integrates JA-signals downstream of COI1 which is required for JAinduced anthocyanin biosynthesis (Kidd et al, 2009); (Xie et al, 1998;Kidd et al, 2009;Shan et al, 2009).…”

Section: Phytoalexins and Other Secondary Metabolitesmentioning

confidence: 99%

Necrotroph Attacks on Plants: Wanton Destruction or Covert Extortion?

Laluk

Mengiste

2010

The Arabidopsis Book

209

168

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Necrotrophic pathogens cause major pre-and post-harvest diseases in numerous agronomic and horticultural crops infl icting signifi cant economic losses. In contrast to biotrophs, obligate plant parasites that infect and feed on living cells, necrotrophs promote the destruction of host cells to feed on their contents. This difference underpins the divergent pathogenesis strategies and plant immune responses to biotrophic and necrotrophic infections. This chapter focuses on Arabidopsis immunity to necrotrophic pathogens. The strategies of infection, virulence and suppression of host defenses recruited by necrotrophs and the variation in host resistance mechanisms are highlighted. The multiplicity of intraspecifi c virulence factors and species diversity in necrotrophic organisms corresponds to variations in host resistance strategies. Resistance to host-specifi c necrotophs is monogenic whereas defense against broad host necrotrophs is complex, requiring the involvement of many genes and pathways for full resistance. Mechanisms and components of immunity such as the role of plant hormones, secondary metabolites, and pathogenesis-related proteins are presented. We will discuss the current state of knowledge of Arabidopsis immune responses to necrotrophic pathogens, the interactions of these responses with other defense pathways, and contemplate on the directions of future research.: e0136. of 34The Arabidopsis Book Infection by fungal necrotrophs generally involves stages of conidial attachment, germination, host penetration, primary lesion formation, lesion expansion, and tissue maceration followed by sporulation (Prins et al., 2000). Following germination, penetration may be achieved by active mechanisms such as appressoria formation and enzymatic degradation or passively through prior infection or wound sites as well as stomates (Prins et al., 2000). After entry, tissue is decomposed through further cellular dismantling using many of the lytic enzymes employed for initial penetration as well as toxic levels of reactive oxygen species (ROS). Many necrotrophs produce various low-molecular weight phytotoxic metabolites, ranging from host-specifi c to those having adverse effects on many diverse species (van Kan, 2006). Others secrete phytotoxic proteins known to induce necrosis, with the vast majority of broad host necrotrophs producing multiples of both (Pemberton and Salmond, 2004;Gijzen and Nurnberger, 2006;Choquer et al., 2007). Throughout infection, these fungi also actively manipulate host cellular machinery in order to suppress defenses and/or aid in disease progression. Some necrotrophs infl uence host phytohormone levels or employ their own hormone biosynthesis thereby disrupting defense signaling (Prins et al., 2000;Sharon et al., 2004). Others have adapted mechanisms to detoxify host metabolites that interfere with virulence (Morrissey and Osbourn, 1999).Overall, bacterial necrotrophs follow a similar mode of pathogenesis to their fungal counterparts, secreting virulence factors into host tissue to induc...

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Foliar anthocyanins as modulators of stress signals

Cited by 107 publications

References 34 publications

Responses of pomegranate cultivars to severe water stress and recovery: changes on antioxidant enzyme activities, gene expression patterns and water stress responsive metabolites

Responses of pomegranate cultivars to severe water stress and recovery: changes on antioxidant enzyme activities, gene expression patterns and water stress responsive metabolites

Main Leaf Polyphenolic Components of Berry Color Variant Grapevines and Their Acclimative Responses to Sunlight Exposure

Necrotroph Attacks on Plants: Wanton Destruction or Covert Extortion?

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