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Periodic root branching inArabidopsis requires synthesis of an uncharacterized carotenoid derivative
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Van Norman, Jaimie M., Zhang, Jingyuan, Cazzonelli, Christopher I., Pogson, Barry J., Harrison, Peter J. , Bugg, Tim, Chan, Kai Xun, Thompson, Andrew J. and Benfey, Philip N. (2014) Periodic root branching inArabidopsis requires synthesis of an uncharacterized carotenoid derivative. Proceedings of the National Academy of Sciences of the United States of America, Volume 111 (Number 13). E1300-E1309. doi:10.1073/pnas.1403016111 ISSN 0027-8424.
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Official URL: http://dx.doi.org/10.1073/pnas.1403016111
Abstract
In plants, continuous formation of lateral roots (LRs) facilitates efficient exploration of the soil environment. Roots can maximize developmental capacity in variable environmental conditions through establishment of sites competent to form LRs. This LR prepattern is established by a periodic oscillation in gene expression near the root tip. The spatial distribution of competent (prebranch) sites results from the interplay between this periodic process and primary root growth; yet, much about this oscillatory process and the formation of prebranch sites remains unknown. We find that disruption of carotenoid biosynthesis results in seedlings with very few LRs. Carotenoids are further required for the output of the LR clock because inhibition of carotenoid synthesis also results in fewer sites competent to form LRs. Genetic analyses and a carotenoid cleavage inhibitor indicate that an apocarotenoid, distinct from abscisic acid or strigolactone, is specifically required for LR formation. Expression of a key carotenoid biosynthesis gene occurs in a spatially specific pattern along the root's axis, suggesting spatial regulation of carotenoid synthesis. These results indicate that developmental prepatterning of LRs requires an uncharacterized carotenoid-derived molecule. We propose that this molecule functions non-cell-autonomously in establishment of the LR prepattern.
Periodic root branching in Arabidopsis requires synthesis of an uncharacterized carotenoid derivative. Available from: https://www.researchgate.net/publication/260876705_Periodic_root_branching_in_Arabidopsis_requires_synthesis_of_an_uncharacterized_carotenoid_derivative [accessed Apr 8, 2015].
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||
Journal or Publication Title: | Proceedings of the National Academy of Sciences of the United States of America | ||||||||
Publisher: | National Academy of Sciences | ||||||||
ISSN: | 0027-8424 | ||||||||
Official Date: | 1 April 2014 | ||||||||
Dates: |
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Volume: | Volume 111 | ||||||||
Number: | Number 13 | ||||||||
Page Range: | E1300-E1309 | ||||||||
DOI: | 10.1073/pnas.1403016111 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access |
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