A large population of primary roots of Zea mays (cv. LG 11) was selected for uniform length at zero time. Their individual growth rates were measured over an 8-h period in the vertical position (in humid air, darkness). Three groups of these roots with significantly different growth rates were then
Importance of the cap cells in maize root gravireaction
β Scribed by Paul-Emile Pilet
- Publisher
- Springer-Verlag
- Year
- 1982
- Tongue
- English
- Weight
- 160 KB
- Volume
- 156
- Category
- Article
- ISSN
- 0032-0935
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β¦ Synopsis
The length of the maize root cap differs significantly from one root to another. The gravireaction of roots appears to depend upon the cap length; when it is smallest, the downward curvature is lowest. Using a freezing technique, it was possible to destroy a part of the root cap and to observe that the smaller the number of root cap cells which remained, the less pronounced was the gravitropic response.
π SIMILAR VOLUMES
The occurrence and distribution of abscisic acid (ABA), xanthoxin (Xa) and the carotenoid violaxanthin (Va) were investigated in root tips of maize (Zea mays L. cv. Merit). In roots grown in the dark, Va and ABA were present in relatively high amounts in the root cap and in low amounts in the adjace
Illumination of maize roots initiates changes in mRNA levels and in the activities of proteins within the root cap. Using Northern analysis we showed a 5-6 fold increase in the levels of three specific mRNAs and a 14-fold increase in plastid mRNA. This increase is rapid, occurring within 30 minutes
Quantitative analyses o f a b s c i s i c acid (ABA) in different parts of maize r o o t tips (Zea mays L. cv. K e l v e d o n 33) were p e r f o r m e d by mass fragmentography using the h e x a d e u t e r a t e d analog of A B A as internal standard. It was found that the cap and the apex contain