Colloidal gold‐labelled antibody was used to localize indole‐3‐acetic acid in caps of primary roots of Z. mays cv. Kys. Gold particles accumulated on the nucleus, vacuoles, mitochondria, and some dictyosomes and dictyosome‐derived vesicles. This is the first localization of indole‐3‐acetic acid in dictyosomes and dictyosome‐derived vesicles and indicates that dictyosomes and vesicles constitute a pathway for indole‐3‐acetic acid movement in and secretion from root cap cells. Our findings provide cytochemical evidence to support the hypothesis that indole‐3‐acetic acid plays an important role in root gravitropism.
|Original language||English (US)|
|Number of pages||7|
|Journal||Plant, Cell & Environment|
|State||Published - Nov 1993|
- Zea mays, corn
- colloidal gold immunocytochemistry
- indole‐3‐acetic acid (IAA)