Physiological Mechanism of Resistance of Maize Suberin against Fusarium graminearum Infection
Suberin is a kind of biological polyester in plants with glycerides-phenols as the basic unit.It serves as a protective barrier against the invasion of pathogenic fungi.Unlike the single-layered suberin of general plants,the influence of the double-suberin structure of maize on the invasion of external pathogens is still unclear.In this study,a maize F.graminearum interaction system was established,and on this basis,the genotype screening of the difference in suberin in maize roots in response to F.graminearum infection was carried out.Then the tissue obser-vation of maize roots and the quantitative analysis of F.graminearum biomass in different genotypes of maize roots were carried out to compare the infectivity differences of F.graminearum on different genotypes of maize.The re-sults indicated that the infection level of F.graminearum on different genotypes of maize was inversely proportional to the suberin contents in the root.The higher the suberin content in the maize roots,the stronger the ability to inhib-it F.graminearum infection.This study suggests that the dual suberin layers in the maize roots can effectively de-fense against the invasion of pathogens.
万方数据
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