Lingua Guido, D'Agostino Giovanni, Massa Nadia, Antosiano Michele, Berta Graziella
Dipartimento di Scienze e Tecnologie Avanzate, Università del Piemonte Orientale Amedeo Avogadro, Corso Borsalino 54, 15100 Alessandria, Italy.
Mycorrhiza. 2002 Aug;12(4):191-8. doi: 10.1007/s00572-002-0171-z. Epub 2002 Apr 20.
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.
通过形态测量和流式细胞术，研究了丛枝菌根（AM）真菌对番茄中 Stolbur 组植原体的保护作用。当植物同时含有 AM 真菌时，植原体诱导的症状较轻。当存在丛枝菌根时，诸如地上部和根部鲜重、株高、节间长度、叶片数量和不定根直径等形态学参数更接近健康植株。在感染植原体的 AM 植物中观察到核衰老减少；不同倍性水平的核群体百分比介于 AM 植物和感染植原体的植物之间。讨论了这些相互作用的潜在机制，并推测了 AM 真菌的直接作用。
