Fig. 5

Histological characteristics of the stems of the mock and infected resistant and susceptible cultivars at the tillering stage (Z21) under transmission electron microscopy. a Stem cell structure of the mock resistant cultivar. b Stem cell structure of the infected resistant cultivar. c Stem cell structure of the mock susceptible cultivar. d Stem cell structure of the infected susceptible cultivar. e Stem cell nucleus of the mock resistant cultivar. f Stem cell nucleus of the infected resistant cultivar. g Stem cell nucleus of the mock susceptible cultivar. h Stem cell nucleus of the infected susceptible cultivar. i Stem chloroplast of the mock resistant cultivar. j Stem chloroplast of the infected resistant cultivar. k Stem chloroplast of the mock susceptible cultivar. l Stem chloroplast of the infected susceptible cultivar. The resistant cultivar was Mianyang 26/Yumai 47, and the susceptible cultivar was CU42. Black arrows in (a-d) indicate stem cells, black arrows in (e-h) indicate stem nuclei, and black arrows in (i-l) indicate stem chloroplasts (N: Nuclei; CHl: Chloroplast; St: Starch granule; scale bar of (a-d) =10 μm; scale bar of (e-l) = 2 μm)