Question

Which group of plant diseases, caused by a wall-less bacterium restricted to the phloem, characteristically produces symptoms such as yellowing, phyllody (conversion of floral parts into leafy structures) and witches'-broom growth in affected plants, as seen in sesame phyllody and sugarcane grassy shoot disease?

A Rust diseases
B Nematode diseases
C Viroid diseases
D Downy mildew diseases
E Phytoplasma diseases
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