Effects of fluridone and norflurazon on conditioning and germination of Striga asiatica seeds
Effects of fluridone and norflurazon on conditioning and germination of Striga asiatica seeds
复制标题
DOI：
10.1007/s10725-005-4746-5
复制
发表时间：
2006-01-01
影响因子：
4.2
通讯作者：
Takeuchi, Y
中科院分区：
文献类型：
--
作者：
Kusumoto, D;Chae, SH;Takeuchi, Y
已知类胡萝卜素生物合成抑制剂可阻止脱落酸（ABA）的生物合成并影响许多植物种子的萌发和休眠。本研究考察了氟立酮、去氟唑松和地氟苯宁三种类胡萝卜素生物合成抑制剂对亚洲曲线虫种子调理和萌发的影响。氟立酮和去氟唑松均能缩短促萌发剂马癸醇对亚洲紫花苜蓿种子萌发的调节时间，抑制光照和超优温度（40℃）对种子萌发的抑制作用。此外，在水中调理后用氟立酮或去氟拉松处理，以类似于天然发芽刺激剂的方式诱导种子发芽。氟啶酮处理后的幼苗在没有吸器诱导因子的情况下形成吸器样结构。而异氟虫尼对亚洲山茱萸种子的调理和萌发无明显影响。上述结果表明，氟立酮和去氟唑酮对亚洲麦冬种子萌发有不同的影响，可能用于控制亚洲麦冬根寄生虫。
Inhibitors of carotenoid biosynthesis are known to prevent abscisic acid (ABA) biosynthesis and to affect germination and dormancy of seeds in many plants. In this study, the effects of three carotenoid biosynthesis inhibitors, fluridone, norflurazon and diflufenican, on the conditioning and germination of Striga asiatica seeds were examined. Fluridone and norflurazon shortened the conditioning period required before S. asiatica seeds would germinate after exposure to the germination stimulant strigol, and prevented the inhibitory effects of both light and supraoptimal temperature (40 degrees C) on seed germination. In addition, treatment with fluridone or norflurazon after conditioning in water induced seed germination in a manner similar to the effect of natural germination stimulants. Moreover, the seedlings developing after conditioned with fluridone formed haustorium-like structures without the involvement of haustorium inducing factors. In contrast, diflufenican had no effect on the conditioning and germination of S. asiatica seeds. These results indicate that fluridone and norflurazon have various effects on the germination of S. asiatica seeds and might be available for control of root parasites.