GERMINATION STIMULANTS OF WITCHWEED (STRIGA-ASIATICA) FROM HYDROPHOBIC ROOT EXUDATE OF SORGHUM (SORGHUM-BICOLOR)
GERMINATION STIMULANTS OF WITCHWEED (STRIGA-ASIATICA) FROM HYDROPHOBIC ROOT EXUDATE OF SORGHUM (SORGHUM-BICOLOR)
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DOI：
10.1017/s0043174500075172
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发表时间：
1988-07-01
期刊：
影响因子：
2.5
通讯作者：
BUTLER, LG
中科院分区：
文献类型：
--
作者：
NETZLY, DH;RIOPEL, JL;BUTLER, LG
以高粱[Sorcerium bicolor（L.）Moench #3 SORVU“IS 8768”]含有四种对苯醌，其以二氢醌形式作为独脚金[Striga asiatica（L.）昆兹# STRLU]。对三种次要的对苯醌进行了部分表征，发现其结构与该渗出物中主要的对苯醌高粱酮相似。疏水性分泌物的除草活性是由于浓度和pH依赖性抑制根伸长在一些但不是所有的杂草测试。独脚金显然已经将高粱的这些“防御”化合物作为宿主特异性发芽刺激剂。
Hydrophobic exudate from roots of sorghum [Sorghum bicolor (L.) Moench. #3 SORVU ''IS 8768''] contain four p-benzoquinones which in the dihydroquinone form are active as germination stimulants of witchweed [Striga asiatica (L.) Kuntz. # STRLU]. The three minor p-benzoquinones were partially characterized and found to be structurally similar to sorgoleone, the major p-benzoquinone of this exudate. Herbicidal activity of the hydrophobic exudate was due to concentration and pH-dependent inhibition of root elongation in some but not all weeds tested. Witchweed has apparently adapted these "defense" compounds of sorghum as host-specific germination stimulants.