apex

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Related to root apex: root morphology
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distributed over the entire surface of the root apex.
Peroxidase activity along the main root apex of aluminum tolerant and sensitive maize inbred lines (Abstract # 52).
There are 2 basic strategies by which plants can tolerate Al: (i) the ability to exclude Al entry into the root apex and root hairs (apoplasmic mechanisms), and (ii) development of mechanisms that allow the plant to tolerate toxic concentrations of Al within the cell (symplasmic mechanisms) (Taylor 1991).
XMT investigations have shown higher mineral concentrations near the incisal tip of the tooth than at the root apex in rodent enamel and in the outer enamel than the enamel nearer the amelo-dentinal junction [Anderson et al.