The roles of plant phenolics in defence and communication during <i>Agrobacterium</i> and <i>Rhizobium</i> infection

Bhattacharya, Amita; Sood, Priyanka; Citovsky, Vitaly

doi:10.1111/j.1364-3703.2010.00625.x

Cited by 425 publications

(261 citation statements)

References 160 publications

(167 reference statements)

Supporting

Mentioning

252

Contrasting

Unclassified

Order By: Relevance

“…Coumestans are phenolic compounds (aromatic benzene ring compounds with one or more hydroxyl groups) that are produced by plants (Figure 1), mainly for protection against stress. Coumestans are not phenolic alexins, similar compounds which are secreted by perturbed plants and have anti-microbial properties [81]. Coumestan infertility has not attracted as much attention as isoflavone fertility which has been greatly reduced by genetic improvement and by the decommercialisation of 'highly oestrogenic' cultivars of Trifolium species.…”

Section: Coumestansmentioning

confidence: 99%

Fertility of Herbivores Consuming Phytoestrogen-containing Medicago and Trifolium Species

Reed¹

2016

Agriculture

View full text Add to dashboard Cite

Despite their unrivalled value in livestock systems, certain temperate, pasture, legume species and varieties may contain phytoestrogens which can lower flock/herd fertility. Such compounds, whose chemical structure and biological activity resembles that of estradiol-17α, include the isoflavones that have caused devastating effects (some of them permanent) on the fertility of many Australian sheep flocks. While the persistence of old 'oestrogenic' ecotypes of subterranean clover (Trifolium subterraneum) in pasture remains a risk, genetic improvement has been most effective in lowering isoflavone production in Trifolium species; infertility due to 'clover disease' has been greatly reduced. Coumestans, which can be produced in Medicago species responding to stress, remain a potential risk in cultivars susceptible to, for example, foliar diseases. In the field, coumestrol is often not detected in healthy vegetative Medicago species. Wide variation in its concentration is influenced by environmental factors and stage of growth. Biotic stress is the most studied environmental factor and, in lucerne/alfalfa (Medicago sativa), it is the major determinant of oestrogenicity. Concentrations up to 90 mg coumestrol/kg (all concentrations expressed as DM) have been recorded for lucerne damaged by aphids and up to 600 mg/kg for lucerne stressed by foliar disease(s). Other significant coumestans, e.g., 4'-methoxy-coumestrol, are usually present at the same time. Concentrations exceeding 2000 mg coumestrol/kg have been recorded in diseased, annual species of Medicago. Oestrogenicity of some Medicago species is also influenced by maturity and senescence. Studies in Israel, North America, Europe, New Zealand and Australia have confirmed that coumestans in lucerne, represent an acute or sub-acute loss of reproductive efficiency in herbivores, e.g., sheep, cattle, and possibly horses. When sufficiently exposed peri-conception, coumestrol, sometimes present in lucerne, be it as pasture, hay, silage, pellets, meal, and sprouts, is associated with what can be an insidious, asymptomatic, infertility syndrome. Most livestock research with oestrogenic lucerne has been conducted with sheep. Ewes may be at risk when the coumestrol concentration in their diet exceeds 25 mg/kg. In studies where lambing was compared for lucerne and a phytoestrogen-free treatment, the mean decrease in lambs born/ewe was 13%; ewes on lucerne, exhibited a lower frequency of multiple births.

show abstract

Section: Coumestansmentioning

confidence: 99%

Fertility of Herbivores Consuming Phytoestrogen-containing Medicago and Trifolium Species

Reed¹

2016

Agriculture

View full text Add to dashboard Cite

show abstract

“…In accordance with these suggestions, the literature survey found that the marine red algae are rich sources of phenolic compounds especially bromophenols. The biological properties of polyphenols include antioxidant (Bhattacharya et al, 2010) and anticancer (Borchardt et al, 2008) effects. Furthermore, tannis and flavonoids are defined as naturally occurring seaweed polyphenolic compounds which have been found only in marine algae (Li et al, 2010).…”

Section: 4311 Cytotoxicity Of Biosynthesized Gold Nanoparticles Withmentioning

confidence: 99%

Cytotoxic Activity of Biosynthesized Gold Nanoparticles with an Extract of the Red Seaweed Corallina officinalis on the MCF-7 Human Breast Cancer Cell Line

El-Kassas

El‐Sheekh²

2014

Asian Pacific Journal of Cancer Prevention

122

View full text Add to dashboard Cite

“…Anthraquinones, flavonoids, tannins and phenolic compounds are some of the compounds constituting the phenolics. Plants produced this group of compounds mainly to fight against stress (Bhattacharya et al, 2010). This study revealed the presence of flavonoids and tannins and phenolic compounds in the I. pes caprae (Linn.)…”

Section: Resultsmentioning

confidence: 99%

Phytochemical Screening and Antioxidative Potentials of “Beach Morning Glory” Ipomoea pes- caprae (Linn.) Roth Leaves Extract

Matunog

Bajo

2013

JMDS

View full text Add to dashboard Cite

Ipomoea pes-caprae (Linn.) Roth, or beach morning glory, is a mangrove associate medicinal plant species of Convolvulaceae family that favorably grows in tropical and subtropical countries. Previous phytochemical screening revealed the presence of pharmacologically active components which could differ according to environmental conditions. In the Philippines, evidences on extensive investigation of the plant are not yet available. This study aimed to conduct phytochemical screening, and antioxidative potential determination of the dried leaves aqueous ethanol extract of I. pes-caprae (Linn.) Roth. Exhaustive serial extraction apportioned the crude ethanol extract (CEE) into hexane extract (HE); ethyl acetate extract (EAE); methanol extract (ME) and aqueous extract (AE). Ferric thiocyanate (FTC) assay determined the antioxidative potentials of CEE and the four serial extracts. The positive controls used in FTC assay were Vitamin E and butylated hydroxyl toluene (BHT). Phytochemical screening of CEE showed the presence of alkaloids; flavonoids; steroids and triterpenes; and tannins and phenolic compounds. FTC assay on CEE showed antioxidative activity but of lower extent than vitamin E and BHT. For serial extracts, FTC assay revealed that ME and AE possessed antioxidative activity comparable to vitamin E and BHT. These results showed that the wildly grown I. pescaprae is a potential source of pharmacologically active phytochemicals specifically the antioxidants.

show abstract

The roles of plant phenolics in defence and communication during Agrobacterium and Rhizobium infection

Cited by 425 publications

References 160 publications

Fertility of Herbivores Consuming Phytoestrogen-containing Medicago and Trifolium Species

Fertility of Herbivores Consuming Phytoestrogen-containing Medicago and Trifolium Species

Cytotoxic Activity of Biosynthesized Gold Nanoparticles with an Extract of the Red Seaweed Corallina officinalis on the MCF-7 Human Breast Cancer Cell Line

Phytochemical Screening and Antioxidative Potentials of “Beach Morning Glory” Ipomoea pes- caprae (Linn.) Roth Leaves Extract

Contact Info

Product

Resources

About