Tolerance and resistance of sorghum to Striga

本研究旨在了解高粱和水稻对稻曲菌的耐抗性机制。我们澄清了高粱和striiga对脱落酸（ABA）的气孔响应差异诱导水分和溶质从寄主转移到寄生虫。没有发现ABA从Striga转移到高粱的证据，这与寄主植物对Striga的耐受性与ABA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瘤菌评价中显示的寄主植物抗斯特里加菌的品种差异。土壤种子库密度和株数对水稻抗斯曲加菌性有影响，为水稻抗斯曲加菌的持久性提供了重要信息。

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.