Novel insights into host specificity of Pyricularia oryzae and Pyricularia grisea in the infection of gramineous plant roots.

ABSTRACT: Pyricularia oryzae and Pyricularia grisea are pathogens that cause blast disease in various monocots. It has been reported that P. oryzae infects the leaves and roots of rice via different mechanisms. However, it is unclear to what extent the tissue types affect the host specificities of P. oryzae and P. grisea. Here, we evaluated the tissue-specific infection strategies of P. oryzae and P. grisea in various gramineous plants. Generally, mycelial plug inoculation caused root browning but the degree of browning did not simply follow the disease index on leaves. Interestingly, the Triticum and Digitaria pathotypes caused strong root growth inhibition in rice, wheat, and barley. Moreover, the Digitaria pathotype inhibited root branching only in rice. Culture filtrate reproduced these inhibito

SUBMITTER: Xiang Z 

PROVIDER: S-EPMC9562571 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature