Wachstumsinduktion und Wuchsstoffmetabolismus im Weizenkoleoptilzylinder

Klämbt, Hans-Dieter

doi:10.1007/bf01915408

Cited by 19 publications

(5 citation statements)

References 17 publications

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“…Thus, compound 17 was determined to be (±)-2-(2-oxoindolin-3-yl)acetamide. The synthesis of the racemate has been reported, but no spectroscopic data are available in the literature …”

Section: Resultsmentioning

confidence: 99%

Alkaloids from the Root of Isatis indigotica

Gan²,

et al. 2012

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Seventeen new alkaloids (1-17) and 14 known analogues have been isolated from an aqueous extract of the root of Isatis indigotica. The structures and absolute configurations of these compounds were determined by extensive spectroscopic data analysis, including 2D NMR, single-crystal X-ray crystallography using anomalous scattering of Cu Kα radiation, and electronic circular dichroism spectra calculations based on the quantum-mechanical time-dependent density functional theory. Compounds 1, 2, and 3 are the first examples of natural products with unique linkages between a molecule of 2-(4-methoxy-1H-indol-3-yl)acetonitrile and 2-(1H-indol-3-yl)acetonitrile, 2-(4-methoxy-1H-indol-3-yl)acetonitrile, and 4-hydroxyphenylethane, respectively. Compounds (-)-4 and (+)-4 represent the first natural products with the pyrrolo[2,3-b]indolo[5,5a,6-b,a]quinazoline skeleton. Some structural assignments for the new alkaloids suggest that the assignments made for certain previously reported alkaloids require revision. Compounds 1-3 and arvelexin (18) show antiviral activity against the influenza virus A/Hanfang/359/95 (H3N2), with IC(50) values of 3.70-12.35 μM, and 17 inhibits Coxsackie virus B3 replication with an IC(50) of 6.87 μM.

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“…Thus, compound 17 was determined to be (±)-2-(2-oxoindolin-3-yl)acetamide. The synthesis of the racemate has been reported, but no spectroscopic data are available in the literature …”

Section: Resultsmentioning

confidence: 99%

Alkaloids from the Root of Isatis indigotica

Gan²,

et al. 2012

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“…The resulting insoluble copper complex was decomposed by H2S to give IAA-LYS in high yield (Figure 2). This procedure apparently is not adapted for the synthesis of indole-3-acetylaspartic acid (Good, 1956;Klambt, 1961).…”

Section: Discussionmentioning

confidence: 99%

Microbial synthesis and degradation of indole-3-acetic acid. III. Isolation and characterization of N-L-lysine

Hutzinger¹,

Kosuge²

1968

Biochemistry

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“…MT was found as an endogenous compound in plants [21,[28][29][30][31][32][33][34][35] suggesting that endogenous MT contained D-Trp. Its presence in plants has long been considered as the evidence of plant's ability to synthesize D-Trp.…”

Section: Tryptophan Malonylation As a Means For Its Metabolyzationmentioning

confidence: 99%

“…It was observed that MT formed and accumulated in fruits, seeds and seedlings [13,29,30,[36][37][38] as well as in wheat sseedling's roots [28] and in vitro cultured cells [19,30,37]. It is evident that other physiological processes in plants were also accompanied by MT formation and accumulation.…”

Section: Tryptophan Malonylation As a Means For Its Metabolyzationmentioning

confidence: 99%

The Dependence of <i> N</i>-Malonyltryptophan Formation in Plants on Water Deficit (Review)

Gamburg¹

2021

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Drought stress in plants is accompanied by several metabolic changes. One of them is the appearance of N-malonyltryptophan (MT) during leaf wilting of many species, but there is a significant number of plant species in which the appearance of MT did not occur. Plants of some species were able to synthesize also N-acetyltryptophan (AT). Excised tomato leaves incubated with D-amino acids (including D-Trp) transform them into malonyl-and acetyl-derivatives even without water deficit. However, MT which appeared during water deficit has been shown to contain L-Trp. Amino acid-1-amino-cyclopropane-1-carboxylic acid (ACC) is also malonylated during water deficit, but other L-amino acids were not malonylated. N-malonyl transferases specific for Trp and ACC have been found in several plants. The existence of N-malonyltransferase specific to L-Trp and appeared during water deficit in plants forming MT is supposed, but clear experimental proof has not been obtained yet. Plants can transform MT applied exogenously into Trp and further to indole-3-acetic acid (IAA). But no evidence has been appeared up to now that endogenous MT may be a source of IAA. It is unknown till now why it is necessary for plants of many species to malonylate only Trp during water deficit. How MT metabolized in animals and if it affects them is also unknown. The necessity to use molecular-genetic approaches for the elucidation of the physiological significance of MT formation during water deficit is underlined.

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Wachstumsinduktion und Wuchsstoffmetabolismus im Weizenkoleoptilzylinder

Cited by 19 publications

References 17 publications

Alkaloids from the Root of Isatis indigotica

Alkaloids from the Root of Isatis indigotica

Microbial synthesis and degradation of indole-3-acetic acid. III. Isolation and characterization of N-L-lysine

The Dependence of <i> N</i>-Malonyltryptophan Formation in Plants on Water Deficit (Review)

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Wachstumsinduktion und Wuchsstoffmetabolismus im Weizenkoleoptilzylinder

Cited by 19 publications

References 17 publications

Alkaloids from the Root of Isatis indigotica

Alkaloids from the Root of Isatis indigotica

Microbial synthesis and degradation of indole-3-acetic acid. III. Isolation and characterization of N-L-lysine

The Dependence of &lt;i&gt; N&lt;/i&gt;-Malonyltryptophan Formation in Plants on Water Deficit (Review)

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The Dependence of <i> N</i>-Malonyltryptophan Formation in Plants on Water Deficit (Review)