Brote Grande, A New Phytoplasma Associated Disease of Chile Peppers in the Desert Southwest

Fig. 2. Light microscopy of leaf cross-sections from healthy and brote grande affected leaves. Leaf tissue was detached near the base of selected leaves and fixed, embedded, cross sectioned, and stained with methylene blue and azure A as detailed in the methods section. Panels A and B show low magnification (100×) photomicrographs from healthy and symptomatic plants respectively with arrows pointing to the vascular bundles which are enlarged and disorganized in the symptomatic sample. Panels C and D show high magnification photomicrographs (400×) from healthy and symptomatic tissue, respectively, with arrows pointing to individual sieve elements that are clear in the healthy sample but contain numerous bacteria like bodies in the symptomatic sample.



Image from Plant Health Progress article:
Brote Grande, A New Phytoplasma Associated Disease of Chile Peppers in the Desert Southwest