Environmental and hormonal control of cambial stem cell dynamics

Perennial trees have the amazing ability to adjust their growth rate to both adverse and favorable seasonally reoccurring environmental conditions over hundreds of years. In trunks and stems, the basis for the tuning of seasonal growth rate is the regulation of cambial stem cell activity. Cambial st...

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Bibliographic Details
Published in:Journal of experimental botany 2017-01, Vol.68 (1), p.79-87
Main Authors: Bhalerao, Rishikesh P., Fischer, Urs
Format: Article
Language:English
Subjects:
Arabidopsis - cytology
Arabidopsis - physiology
Botanik
Botany
Cambium - cytology
Cambium - physiology
Developmental Biology
Environment
Gene Expression Regulation, Plant - physiology
Plant Growth Regulators - physiology
Plant Stems - cytology
Plant Stems - physiology
REVIEW PAPER
Seasons
Trees - cytology
Trees - growth & development
Trees - physiology
Trävetenskap
Utvecklingsbiologi
Wood Science
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Summary:Perennial trees have the amazing ability to adjust their growth rate to both adverse and favorable seasonally reoccurring environmental conditions over hundreds of years. In trunks and stems, the basis for the tuning of seasonal growth rate is the regulation of cambial stem cell activity. Cambial stem cell quiescence and dormancy protect the tree from potential physiological and genomic damage caused by adverse growing conditions and may permit a long lifespan. Cambial dormancy and longevity are both aspects of a tree’s life for which the study of cambial stem cell behavior in the annual model plant Arabidopsis is inadequate. Recent functional analyses of hormone perception and catabolism mutants in Populus indicate that shoot-derived long-range signals, as well as local cues, steer cambial activity. Auxin is central to the regulation of cambial activity and probably also maintenance. Emerging genome editing and phenotyping technologies will enable the identification of down-stream targets of hormonal action and facilitate the genetic dissection of complex traits of cambial biology.
ISSN:0022-0957
1460-2431
1460-2431
DOI:10.1093/jxb/erw466