TY - JOUR
T1 - Contribution of militarine and dactylorhin A to the plant growth-inhibitory activity of a weed-suppressing orchid, Bletilla striata
AU - Sakuno, Emi
AU - Kamo, Tsunashi
AU - Takemura, Tomoko
AU - Sugie, Hajime
AU - Hiradate, Syuntaro
AU - Fujii, Yoshiharu
PY - 2010/9
Y1 - 2010/9
N2 - The methanol extract of Bletilla striata, an ornamental orchid in eastern Asia, exhibited plant growth-inhibitory activity. It was purified by continuous chromatography, based on the inhibitory activity against the growth of lettuce seedlings, resulting in two glycosidic compounds, militarine and dactylorhin A. The EC50 values of militarine and dactylorhin A against the radicle elongation of the lettuce seedlings were 0.28 and 0.88-mmol-L-1, respectively. The amount of militarine and dactylorhin A in the methanol extract of the aerial part of B. striata was calculated to be 5.6 and 7.5-mg-g-1 fresh weight, respectively. The inhibitory activity of militarine and its content in the methanol extract revealed that the plant growth-inhibitory activity of the extract of B. striata was mainly related to militarine. The inhibitory activity of militarine against the growth of Italian ryegrass and timothy were of the same level as that of lettuce.
AB - The methanol extract of Bletilla striata, an ornamental orchid in eastern Asia, exhibited plant growth-inhibitory activity. It was purified by continuous chromatography, based on the inhibitory activity against the growth of lettuce seedlings, resulting in two glycosidic compounds, militarine and dactylorhin A. The EC50 values of militarine and dactylorhin A against the radicle elongation of the lettuce seedlings were 0.28 and 0.88-mmol-L-1, respectively. The amount of militarine and dactylorhin A in the methanol extract of the aerial part of B. striata was calculated to be 5.6 and 7.5-mg-g-1 fresh weight, respectively. The inhibitory activity of militarine and its content in the methanol extract revealed that the plant growth-inhibitory activity of the extract of B. striata was mainly related to militarine. The inhibitory activity of militarine against the growth of Italian ryegrass and timothy were of the same level as that of lettuce.
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U2 - 10.1111/j.1445-6664.2010.00385.x
DO - 10.1111/j.1445-6664.2010.00385.x
M3 - Article
AN - SCOPUS:78650476344
VL - 10
SP - 202
EP - 207
JO - Weed Biology and Management
JF - Weed Biology and Management
SN - 1444-6162
IS - 3
ER -