Mycorrhiza-induced differential response to a yellows disease in tomato (original) (raw)

Abstract.

The protective effects induced by arbuscular mycorrhizal (AM) fungi against a phytoplasma of the Stolbur group have been investigated in tomato by morphometry and flow cytometry. Symptoms induced by the phytoplasma were less severe when the plants also harboured AM fungi. Morphological parameters such as shoot and root fresh weight, shoot height, internode length, leaf number and adventitious root diameter were closer to those of healthy plants when arbuscular mycorrhiza were present. Reduced nuclear senescence was observed in AM plants infected with phytoplasmas; the percentages of nuclear populations with different ploidy levels were intermediate between AM and phytoplasma-infected plants. The mechanisms underlying these interactions are discussed and a direct action of the AM fungus is hypothesized.

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Authors and Affiliations

1. Dipartimento di Scienze e Tecnologie Avanzate, Università del Piemonte Orientale "Amedeo Avogadro", Corso Borsalino 54, 15100 Alessandria, Italy, , , , ,
   Guido Lingua, Nadia Massa, Michele Antosiano & Graziella Berta
2. Istituto di Virologia Vegetale del CNR, Strada delle Cacce 73, 10100 Turin, Italy, , , , ,
   Giovanni D'Agostino

Authors

1. Guido Lingua
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2. Giovanni D'Agostino
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3. Nadia Massa
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4. Michele Antosiano
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5. Graziella Berta
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Lingua, G., D'Agostino, G., Massa, N. et al. Mycorrhiza-induced differential response to a yellows disease in tomato.Mycorrhiza 12, 191–198 (2002). https://doi.org/10.1007/s00572-002-0171-z

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• Received: 28 May 2001
• Accepted: 21 February 2002
• Issue Date: August 2002
• DOI: https://doi.org/10.1007/s00572-002-0171-z