Malvone A, a phytoalexin found in Malva sylvestris (family Malvaceae).
The isolation and structure of a phytoalexin, malvone A (2-methyl-3-methoxy-5,6-dihydroxy-1,4-naphthoquinone) is reported. Malvone A formation is induced in Malva sylvestris L. by the plant pathogen Verticillium dahliae. In a turbimetric assay for toxicity to V. dahliae, it had an ED50 value of 24 microg/ml. The structure of malvone A was determined by MS and NMR spectroscopy, and by X-ray crystallographic analysis. The X-ray analysis showed water molecules were located in channels that run along the a-axis.
Veshkurova
Olga
O
A.S. Sadykov Institute of Bioorganic Chemistry, Academy of Science Uzbekistan, Tashkent, Uzbekistan.
Golubenko
Zamira
Z
Pshenichnov
Egor
E
Arzanova
Irina
I
Uzbekov
Vyacheslav
V
Sultanova
Elvira
E
Salikhov
Shavkat
S
Williams
Howard J
HJ
Reibenspies
Joseph H
JH
Puckhaber
Lorraine S
LS
Stipanovic
Robert D
RD
D028501:Malva / Q000737:chemistry* / Q000145:classification / Q000382:microbiology; D015394:Molecular Structure; D009285:Naphthoquinones / Q000737:chemistry* / Q000302:isolation & purification*; D010935:Plant Diseases; D012717:Sesquiterpenes; D013729:Terpenes / Q000737:chemistry* / Q000302:isolation & purification*; D020172:Verticillium / Q000502:physiology; D000094162:Phytoalexins
D009285:Naphthoquinones; D012717:Sesquiterpenes; D013729:Terpenes; C516455:malvone A; D000094162:Phytoalexins