TY - JOUR
T1 - A species-selective allelopathic substance from germinating sunflower (Helianthus annuus L.) seeds
AU - Ohno, Shuji
AU - Tomita-Yokotani, Kaori
AU - Kosemura, Seiji
AU - Node, Mari
AU - Suzuki, Toshisada
AU - Amano, Midori
AU - Yasui, Kazuomi
AU - Goto, Toshio
AU - Yamamura, Shosuke
AU - Hasegawa, Koji
PY - 2001/3/23
Y1 - 2001/3/23
N2 - From the exudate of germinating sunflower(Helianthus annuus L.) seeds was isolated a stereoisomer of diversifolide, 4. 15-dinor-3-hydroxy-1(5)-xanthene-12.8-olide (designated sundiversifolide) as determined by analysis of its IR, APCI-, ESI- and HR-MS and 13C and 1H NMR spectra. This substance inhibited shoot and root growth of cat's-eyes by about 50% at a concentration of 30 ppm. It also showed species-selective activity on the shoot and root growth of tested plants. When cat's-eyes seeds were incubated together with sunflower seeds, the cat's-eyes growth was inhibited. Furthermore, it was detected from an extract of river sand when sunflower seeds were incubated on the sand. These results indicate that sundiversifolide has an allelopathic function in sunflower plants.
AB - From the exudate of germinating sunflower(Helianthus annuus L.) seeds was isolated a stereoisomer of diversifolide, 4. 15-dinor-3-hydroxy-1(5)-xanthene-12.8-olide (designated sundiversifolide) as determined by analysis of its IR, APCI-, ESI- and HR-MS and 13C and 1H NMR spectra. This substance inhibited shoot and root growth of cat's-eyes by about 50% at a concentration of 30 ppm. It also showed species-selective activity on the shoot and root growth of tested plants. When cat's-eyes seeds were incubated together with sunflower seeds, the cat's-eyes growth was inhibited. Furthermore, it was detected from an extract of river sand when sunflower seeds were incubated on the sand. These results indicate that sundiversifolide has an allelopathic function in sunflower plants.
KW - 4.15-Dinor-3-hydroxy-1(5)-xanthene-12.8-olide
KW - Allelopathic substance
KW - Compositae
KW - Growth inhibitor
KW - Helianthus annuus L.
KW - Sundiversifolide
UR - http://www.scopus.com/inward/record.url?scp=0035937613&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035937613&partnerID=8YFLogxK
U2 - 10.1016/S0031-9422(00)00416-7
DO - 10.1016/S0031-9422(00)00416-7
M3 - Article
C2 - 11281135
AN - SCOPUS:0035937613
VL - 56
SP - 577
EP - 581
JO - Phytochemistry
JF - Phytochemistry
SN - 0031-9422
IS - 6
ER -