Wite D, Mattner S W, Porter I J, Arioli T
Department of Environment and Primary Industries, Knoxfield, Victoria Australia.
Department of Environment and Primary Industries, Knoxfield, Victoria Australia ; Victorian Strawberry Industry Certification Authority, Toolangi, Victoria Australia ; School of Botany, La Trobe University, Bundoora, Victoria Australia.
J Appl Phycol. 2015;27(5):2157-2161. doi: 10.1007/s10811-015-0564-y. Epub 2015 Mar 21.
A sand solution technique demonstrated the capacity for a commercial seaweed extract from and (Seasol Commercial®) to significantly suppress infection of broccoli by . In the primary stages of infection, the extract reduced the number of plasmodia formed in the root hairs by 55 %. Later, in the secondary stages of infection, the extract reduced plasmodia in the root cortical cells by up to 84 %. The suppression of infection was found to be independent of the dilution of the extract applied (1:25 and 1:500). The basis for these results is unlikely to be a nutrient or pH effect since the extract had little impact on these parameters, particularly at the lower dilution (1:200). Rather, we hypothesise that the suppression of infection by the seaweed extract was due to its stimulation of resistance mechanisms in the host, which is possibly related to laminarins in the extract and/or the effect of exogenous growth regulators or undiscovered molecules in the extract disrupting the infection process.
一种砂溶液技术表明，来自[具体来源未提及]的商业海藻提取物（Seasol Commercial®）能够显著抑制西兰花被[病原体未提及]感染。在感染的初级阶段，该提取物使根毛中形成的原质团数量减少了55%。后来，在感染的次级阶段，该提取物使根皮层细胞中的原质团减少了多达84%。研究发现，感染抑制与所施用提取物的稀释度（1:25和1:500）无关。这些结果的依据不太可能是营养或pH效应，因为提取物对这些参数影响很小，尤其是在较低稀释度（1:200）时。相反，我们推测海藻提取物对感染的抑制作用是由于其刺激了宿主的抗性机制，这可能与提取物中的海带多糖和/或提取物中外源生长调节剂或未发现分子破坏感染过程的作用有关。
