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Role of hormones in controlling vascular differentiation and the mechanism of lateral root initiation
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Role of hormones in controlling vascular differentiation and the mechanism of lateral root initiation
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Journal Article
Role of hormones in controlling vascular differentiation and the mechanism of lateral root initiation
2013
Overview
The vascular system in plants is induced and controlled by streams of inductive hormonal signals. Auxin produced in young leaves is the primary controlling signal in vascular differentiation. Its polar and non-polar transport pathways and major controlling mechanisms are clarified. Ethylene produced in differentiating protoxylem vessels is the signal that triggers lateral root initiation, while tumor-induced ethylene is a limiting and controlling factor of crown gall development and its vascular differentiation. Gibberellin produced in mature leaves moves non-polarly and promotes elongation, regulates cambium activity and induces long fibers. Cytokinin from the root cap moves upward to promote cambial activity and stimulate shoot growth and branching, while strigolactone from the root inhibits branching. Furthermore, the role of the hormonal signals in controlling the type of differentiating vascular elements and gradients of conduit size and density, and how they regulate plant adaptation and have shaped wood evolution are elucidated.
Publisher
Springer-Verlag,Springer Berlin Heidelberg,Springer Nature B.V
Subject
/ Auxins
/ Biomedical and Life Sciences
/ Cambium
/ cytology
/ Ecology
/ ethylene
/ Fibers
/ Forestry
/ Hormones
/ Leaves
/ Plant Growth Regulators - metabolism
/ Plant Leaves - anatomy & histology
/ Plant Roots - growth & development
/ Plant Vascular Bundle - anatomy & histology
/ Plant Vascular Bundle - cytology
/ Plants
/ REVIEW
/ root cap
/ shoots
/ wood
/ Xylem
