Growth and Morphogenesis of Striga Seedlings
Growth and Morphogenesis of Striga Seedlings
复制标题
独脚金幼苗的生长和形态发生
DOI：
10.1038/189378a0
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发表时间：
1961
期刊：
影响因子：
64.8
通讯作者：
COLIN N. Williams
中科院分区：
文献类型：
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作者：
COLIN N. Williams
亚洲草（-S. utea）的种子在沙盆中种植各种高粱[Sorghum bicolor]（易受独脚金侵袭）并用水洗脱沙子而产生的溶液中发芽。研究了不同质量光对独脚金生长的影响，以及赤霉素和激动素对独脚金幼苗生长的影响。光（最有效的波段是蓝色）的主要作用是减少胚根生长的延伸，增加胚根直径，产生根毛，以及偶尔使细胞增殖成胚根的分支状肿胀。 GA和激动素（已知会产生类似于光引起的某些效果）诱导芽发育和胚根分枝，因此得出结论，寄生虫的生长可能依赖于寄主植物提供的此类生长因子。还表明寄主植物（高粱[Sorghum bicolor]var.）的根际中存在对独脚金幼苗发育具有强烈形态发生影响的因子。从获得的结果和 Worsham [Fld Crop Abstr.13: 933] 的结果得出结论，发芽复合物的成分之一可能是类似激动素的化合物，其三发芽所需的浓度将低于形态发生效应所需的浓度。-M.H.
Seedsof S. asiatica(-S. lutea) were germinated in a solution produced by growing a variety ofSorghum vulgare[Sorghum bicolor](susceptible to attack byStriga) in pots of sand and eluting the sand with water. The effect of light of different quality on the growth of theStrigaradicle was studied, together with the effect of GA and kinetin on growth of theStrigaseedlings. The main effects of light (the most effective band being the blue) were a reduction in extension of radicle growth, an increase in radicle diameter, production of root hairs, and an occasional proliferation of cells into a branch-like swelling of the radicle. GA and kinetin (known to produce certain effects which resemble those caused by light) induced shoot development and branching of the radicle and it was concluded that the parasite probably depends for its growth on a supply of growth factors of this type from the host plant. There was also indication that a factor with strong morphogenic influence on the development ofStrigaseedlings was present in the rhizosphere of the host plant (Sorghum vulgare[Sorghum bicolor]var.). From the results obtained and those of Worsham [Fld Crop Abstr.13: 933] it is concluded that one of the components of the germination complex may be a kinetin-like compound, of which the concentration required forStrigagermination would be less than that required for morphogenic effects.-M.H.