Table 1. Aldehyde oxidase in plants.

Species	Substrate/localization	Protein	Function	Reference
Cucumber	Benzaldehyde, Phenylacetaldehyde Indole-3-acetaldehyde (major)	AO1	IAA biosynthesis	Bower, Brown & Purves (1978)
Pea	Indole-3-acetaldehyde	AO1	IAA biosyntesis	Miyata et al. (1981)
Pea	Indole-3-aldehyde	AO3	AO activity and ABA induced by suboptimal conditions	Zdunek & Lips (2001)
Maize	Indole-3-acetaldehyde/apical region of coleoptiles	AO1	IAA production	Koshiba et al. (1996)
Barley	indole-3-aldehyde, acetaldehyde, heptaldehyde, benzaldehyde	AOs		Omarov et al. (1999)
Oat	indoleacetaldehyde		IAA biosynthesis	Rajagopal (1971)
Arabidopsis	Indole-3-aldehyde	AO1	ABA biosyntesis	Seo et al. (1998), Böttcher et al. (2014)
Arabidopsis	Abscisic aldehyde/rosette leaves	AO3	ABA production	González-Guzmán et al. (2004)
Arabidopsis	Abscisic aldehyde	AO3	ABA and ROS production, drought and water stress	Yesbergenova et al. (2005)
Arabidopsis	Aromatic and aliphatic aldehydes/silique	AO4	Aldehyde detoxification	Srivastava et al. (2017)
Arabidopsis	Abscisic aldehyde, hexanal, and acetaldehyde	AO3	ABA production, Aldehyde detoxification	Nurbekova et al. (2021)
Arabidopsis	Abscisic aldehyde/leaves	AO3	ABA biosyntesis	Seo et al. (2000a)
Arabidopsis	Abscisic aldehyde/seeds	AO3	ABA biosyntesis	Seo et al. (2004)
Arabidopsis	Benzaldehyde/sillique	AO4	Benzoic acid	Ibdah et al. (2009)
wheat	Abscisic aldehyde	AO3	carotenoid pigments accumulation	Colasuonno et al. (2017)
Rice	Abscisic aldehyde/germinated seeds, roots, leaves, floral organs, vascular tissues, guard cells	AO3	ABA production, drought stress	Shi et al. (2021)