GNOM regulates root hydrotropism and phototropism independently of PIN-mediated auxin transport

- gnomemb30-1 rescued ahydrotropic phenotype of gnommiz2, while gnomB4049 did not.
- Requirement of GNOM function differs among the tropisms.
- GNOM can regulate root phototropism independent of PIN2 polar targeting.
- Auxin related defects of severe gnom mutants are fully recovered by gnommiz2.
- A novel GNOM function regulates root hydrotropism and phototropism.