1.10.3.3 up enzyme expression of Lotus japonicus is induced in the symbiotic interaction with both nitrogen-fixing bacteria and arbuscular mycorrhizal fungi, symbiosis-induced ascorbate oxidase gene overexpressed in Lotus japonicus during its interaction with either N2-fixing Mesorhizobium loti or the AM fungus Gigaspora margarita, overview 1.10.3.3 up NaCl-induced ascorbate oxidase activity 1.10.3.3 up expression is upregulated under indole-3-acetic acid treatment. The ascorbate oxidase gene AO1 is preferentially expressed during the fiber cell fast elongation period at the mRNA level 1.10.3.3 up isoform AAO2 is the most stress responsive gene in response to salinity and drought stress in rice shoots. On the other hand, isoforms AAO3 and AAO4 show enhanced expression in roots under salinity/drought stresses 1.10.3.3 up the expression of isoform AO4 is induced during the initial infection period (up to 72 h) in Cucumber mosaic virus-infected Nicotiana benthamiana