Drdová, E. J., Klejchová, M. , Janko, K., Hála, M., Soukupová, H., Cvrčková, F. and Žárský, V. (2019) Developmental plasticity of Arabidopsis hypocotyl is dependent on exocyst complex function. Journal of Experimental Botany, 70(4), pp. 1255-1265. (doi: 10.1093/jxb/erz005) (PMID:30649396) (PMCID:PMC6382343)
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Abstract
The collet (root–hypocotyl junction) region is an important plant transition zone between soil and atmospheric environments. Despite its crucial importance for plant development, little is known about how this transition zone is specified. Here we document the involvement of the exocyst complex in this process. The exocyst, an octameric tethering complex, participates in secretion and membrane recycling and is central to numerous cellular and developmental processes, such as growth of root hairs, cell expansion, recycling of PIN auxin efflux carriers and many others. We show that dark-grown Arabidopsis mutants deficient in exocyst subunits can form a hair-bearing ectopic collet-like structure above the true collet, morphologically resembling the true collet but also retaining some characteristics of the hypocotyl. The penetrance of this phenotypic defect is significantly influenced by cultivation temperature and carbon source, and is related to a defect in auxin regulation. These observations provide new insights into the regulation of collet region formation and developmental plasticity of the hypocotyl.
| Item Type: | Articles |
|---|---|
| Additional Information: | This work was supported by CSF/GACR/FWF GF16-34887L and by the Ministry of Education, Youth and Sports of the Czech Republic (NPUI LO1417 to VZ) and OPPC CZ.2.16/3.1.00/21519. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Klejchova, Mrs Martina |
| Authors: | Drdová, E. J., Klejchová, M., Janko, K., Hála, M., Soukupová, H., Cvrčková, F., and Žárský, V. |
| College/School: | College of Medical Veterinary and Life Sciences > School of Molecular Biosciences |
| Journal Name: | Journal of Experimental Botany |
| Publisher: | Oxford University Press |
| ISSN: | 0022-0957 |
| ISSN (Online): | 1460-2431 |
| Published Online: | 14 January 2019 |
| Copyright Holders: | Copyright © 2019 The Authors |
| First Published: | First published in Journal of Experimental Botany 70(4): 1255-1265 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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