[Two new stolbur isolates related to a severe tomato disease in Sardinia [mycoplasma-like organisms]]

adn analyse enzymatique clonage clonazione cloning diagnosi diagnosis diagnostic dna enfermedades de las plantas enzymatic analysis experimental infection genoma genomas genomes ibridazione molecolare identification identificazione infezione sperimentale lycopersicon esculentum maladie des plantes malattie delle piante micoplasmosi micoplasmosis molecular hybridization mycoplasmose mycoplasmoses plant diseases polymerase chain reaction sardaigne sardegna sardinia sintomi symptome symptoms