Tolerance and resistance of sorghum to Striga

本研究旨在了解高粱和水稻对独脚金的耐性/抗性机制。我们澄清了高粱和独脚金之间的气孔响应脱落酸（阿坝）诱导的水和溶质从主机转移到寄生虫的差异。没有发现阿坝从独脚金转移到高粱的证据，这与对独脚金的耐受性与宿主植物阿坝代谢失活有关的假设不一致。在温室和田间试验中，证实了根区评价中所示的寄主植物对独脚金抗性的品种差异。土壤种子库密度和独脚金品系影响水稻品种的抗性，为独脚金抗性的持久性提供重要信息。

This study aims to gain knowledge on tolerance/resistance mechanisms of sorghum and rice to Striga hermonthica. We clarified that differences in stomatal response to Abscisic acid (ABA) between sorghum and Striga induced water and solutes transfer from the host to the parasite. No evidence was found for ABA transfer from Striga to sorghum and this is not consistent with the hypothesis that tolerance to Striga relates to inactivation of ABA metabolism in host plants. Varietal differences in Striga resistance of host plants shown in rhizotron evaluations were confirmed in greenhouse and field experiments. Soil seedbank density and strain of Striga affected resistance of rice varieties, providing important information for the durability of Striga resistance.