Which feature characterizes mycoplasma involved in yellows diseases?

Study for the Maryland Pesticide Applicator Category 3: Ornamental and Turf Test. Access study materials with flashcards and multiple choice questions, each with hints and explanations. Prepare thoroughly for certification!

Multiple Choice

Which feature characterizes mycoplasma involved in yellows diseases?

Explanation:
Wall-less bacteria are the defining feature here. Mycoplasma-like organisms that cause yellows diseases lack a peptidoglycan cell wall, which makes them pleomorphic and unable to be stained reliably by Gram stain. In plants, these organisms (phytoplasmas) live in the phloem and are transmitted by sap-feeding insects, causing symptoms like yellowing and stunting. The other options don’t fit because these organisms do not have a rigid cell wall, do not produce endospores, and are not fungi.

Wall-less bacteria are the defining feature here. Mycoplasma-like organisms that cause yellows diseases lack a peptidoglycan cell wall, which makes them pleomorphic and unable to be stained reliably by Gram stain. In plants, these organisms (phytoplasmas) live in the phloem and are transmitted by sap-feeding insects, causing symptoms like yellowing and stunting. The other options don’t fit because these organisms do not have a rigid cell wall, do not produce endospores, and are not fungi.

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