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Importance of the cap in maize root growth

โœ Scribed by P. E. Pilet

Publisher
Springer-Verlag
Year
1986
Tongue
English
Weight
253 KB
Volume
169
Category
Article
ISSN
0032-0935

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โœฆ Synopsis

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 chosen and their cap length was measured. It was found that slowly growing roots had long caps whereas rapidly growing roots had short caps. The production by the cap cells of basipetally transported growth inhibitors was tested (biologically by the curvature of half-decapped roots) and found to be significantly higher for longer root caps than that for shorter ones.

๐Ÿ“œ SIMILAR VOLUMES

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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

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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

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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