The production of kiwifruit around the world is widely affected by the bacterial canker disease caused by Pseudomonas syringae pv. actinidiae (Psa). The use of resistant rootstock is considered to be an effective way to control diseases; however, there are few studies on the evaluation and utilization of Psa-resistant rootstocks in kiwifruit. A genotype Gui-1 in the Actinidia guilinensis species demonstrated strong resistance to Psa in our previous study, so it was used as a rootstock to evaluate its effect on the resistance of the highly susceptible cultivar ‘Hongyang’ (Actinidia chinensis) with an in vitro assay. The results show that Gui-1 significantly improved the resistance of ‘Hongyang’ scion to Psa without affecting the fruit quality, and also showed that the in vitro cane could still maintain the rootstock-induced resistance, but the resistance imparted to the scion by the rootstock might be spatially and temporally uneven. This study first provides the laboratory evidence of grafting-induced resistance to Psa, which provides a foundation for the application of resistant rootstock in kiwifruit production. The study also provides implications for the study of the mechanism of rootstock–scion interaction, especially those related to the resistance to non-soil-borne disease.

中文翻译：

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关于提高对丁香假单胞菌 pv 抗性的初步报告。栽培猕猴桃（Actinidia chinensis）在离体桂林野生猕猴桃砧木上嫁接时的猕猴桃科

世界各地奇异果的生产受到丁香假单胞菌引起的细菌性溃疡病的广泛影响。猕猴桃 (Psa)。使用抗病砧木被认为是控制病害的有效方法；然而，对猕猴桃抗Psa砧木评价和利用的研究较少。在我们之前的研究中，桂林猕猴桃中的一个基因型 Gui-1 对 Psa 表现出很强的抗性，因此将其用作砧木来评估其对高感品种“红阳”（Actinidia chinensis）抗性的影响化验。结果表明，桂一1在不影响果实品质的情况下显着提高了'红阳'接穗对Psa的抗性，同时也表明离体甘蔗仍能保持砧木诱导的抗性，但是砧木赋予接穗的抗性可能在空间和时间上是不均匀的。本研究首次提供了嫁接诱导抗PSA的实验室证据，为抗性砧木在猕猴桃生产中的应用奠定了基础。该研究还为砧木-接穗相互作用机制的研究提供了启示，尤其是与非土传病害抗性相关的机制。