Primary roots of Ricinus communis having large caps and columella tissues are more graviresponsive than primary roots with small caps and columella tissues. The increased graviresponsiveness of roots with larger caps correlates positively with their columella tissues having larger length: width ratios than less graviresponsive roots having smaller caps. Roots with wider tips typically are more graviresponsive and have more extensive columellas than roots with thinner tips. However, the size of the columella tissue correlates positively with graviresponsiveness, irrespective of the width of the root tip. These results indicate that differing dimensions of the columella tissue may be the basis for the differing graviresponses of primary roots of R. communis.
|Original language||English (US)|
|Number of pages||6|
|Journal||Annals of Botany|
|State||Published - Mar 1985|
Bibliographical noteFunding Information:
I thank John Pasieniuk forhis excellent technical assistance with portions of this work. This research was supported by funds supplied by the Department of Biology and University Research Committee of Baylor University.
- Castor bean
- Primary root
- Ricinus communis
- Root cap
- Root gravitropism