The biosynthesis of shikimate metabolites

Dewick, P. M.

doi:10.1039/np9860300565

Cited by 14 publications

(14 citation statements)

References 36 publications

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“…During HNT stress, an accumulation of amino acids and the regulation of related pathways were reported, such as for the shikimate pathway providing the amino acids tryptophan, phenylalanine and tyrosine. It has been shown previously that this pathway contributes to biotic and abiotic stress responses through the synthesis of protective compounds such as anthocyanins (Dewick, 1995). An increased accumulation of alanine and phenylalanine was observed in developing rice seeds (Dhatt et al, 2019) and wheat spikes (Impa et al, 2019) upon HNT stress.…”

Section: Molecular Responses To Hntmentioning

confidence: 99%

Physiological and molecular attributes contribute to high night temperature tolerance in cereals

Schaarschmidt

Lawas

Kopka

et al. 2021

Plant Cell & Environment

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Asymmetric warming resulting in a faster increase in night compared to day temperatures affects crop yields negatively. Physiological characterization and agronomic findings have been complemented more recently by molecular biology approaches including transcriptomic, proteomic, metabolomic and lipidomic investigations in crops exposed to high night temperature (HNT) conditions. Nevertheless, the understanding of the underlying mechanisms causing yield decline under HNT is still limited. The discovery of significant differences between HNT‐tolerant and HNT‐sensitive cultivars is one of the main research directions to secure continuous food supply under the challenge of increasing climate change. With this review, we provide a summary of current knowledge on the physiological and molecular basis of contrasting HNT tolerance in rice and wheat cultivars. Requirements for HNT tolerance and the special adaptation strategies of the HNT‐tolerant rice cultivar Nagina‐22 (N22) are discussed. Putative metabolite markers for HNT tolerance useful for marker‐assisted breeding are suggested, together with future research directions aimed at improving food security under HNT conditions.

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Section: Molecular Responses To Hntmentioning

confidence: 99%

Physiological and molecular attributes contribute to high night temperature tolerance in cereals

Schaarschmidt

Lawas

Kopka

et al. 2021

Plant Cell & Environment

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“…u u i ^ j "..u intermediates, phosphoenol pyruvate and erythrose-The shikimate pathway is the classic biosynthetic 4-phosphate, which condense to form 3-deoxy-Droute to the aromatic aminoacid constituents of araimo-heptulosonate-T-phosphate (1, in Fig. 1) proteins (Dewick, 1992). This pathway has been in a reaction catalysed by 3-deoxy-D-flm&mofound only in micro-organisms and plants.…”

Section: Introductionmentioning

confidence: 99%

“…The third and fourth steps of almost exclusively to synthesize aromatic amino the shikimate pathway (Fig. 1, reactions b and c) are acids, higher plants use these amino acids not only as catalysed by a bifunctional enzyme named 3protein building blocks, but also as precursors for a dehydroquinate dehydratase/shikimate dehydrolarge number of phenolic secondary metabolites, genase (EC 4.2.1.10/1.1.1.25) (Dewick, 1992). In These can act as phytoalexins, pest and heibivore higher plants, these two enzymic activities reside in deterrents, and u.v.…”

Section: Introductionmentioning

confidence: 99%

Changes in shikimate dehydrogenase and the end products of the shikimate pathway, chlorogenic acid and lignins, during the early development of seedlings of Capsicum annuum

1997

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SUMMARYThe developmental regulation and organ-specific expression of shikimate dehydrogenase was studied in seedlings of Capsicum annuum L. during their early development. The results obtained suggest that there is both a developmental regulation and an organ-specific expression of shikimate dehydrogenase in seedlings of C. annuum, seen mainly in the cotyledons. For example, shikimate dehydrogenase isoenzyme 3 was differentially expressed in cotyledons, but not at all in roots or hypocotyls. When the amounts of shikimate dehydrogenase were compared with the end-products of the shikimate pathway, chlorogenic acid and lignins, it was observed that the fall in shikimate dehydrogenase activity in cotyledons coincided with a decrease in the concentrations of phenolics during primary leaf development. However, this did not seem to be the case with the hypocotyls, where the fall in phenolics was not related to the amount of shikimate dehydrogenase but rather to an increase in lignin deposition, supporting the view that chlorogenic acid might act as a precursor of the aromatic moiety of cinnamoyl alcohols during cell wall ligniflcation.

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“…2.6.1 -571 that was isolated from the thermophilic bacterium Bacillus caldolyticus was extremely thermostable, retaining its activity at 60 "C for several hours, and appears to function in the biosynthesis of phenylalanine and tyrosine rather than in the catabolism of amino acids. 33), but its natural role was uncertain. Phenylalanine hydroxylase [phenylalanine 4-mono-oxygenase ; E.C.…”

Section: Phenylalanine Tyrosine and Dopamentioning

confidence: 99%

“…The final reaction in the biosynthesis of tryptophan, which is the synthesis of L-tryptophan (34) from L-serine and indole-3glycerol phosphate (33), is catalysed by tryptophan synthase [E.C. 4.2.1 .20].…”

Section: Tryptophan Synthasementioning

confidence: 99%