A new version of this entry is available:
Loading...
Article
2020
Spatial and developmental synthesis of endogenous sesquiterpene lactones supports function in growth regulation of sunflower
Spatial and developmental synthesis of endogenous sesquiterpene lactones supports function in growth regulation of sunflower
Abstract (English)
Sunflower, Helianthus annuus, accumulate high concentrations of bioactive sesquiterpene lactones (STL) in glandular trichomes, but in addition, structurally different STL occur in only trace amounts in the inner tissues. The spatial and temporal production of these endogenous STL during early phases of plant development is widely unknown and their physiological function as putative natural growth regulators is yet speculative. By means of HPLC and MS analysis it was shown that costunolide, dehydrocostuslactone, 8-epixanthatin and tomentosin are already present in dry seeds and can be extracted in low amounts from cotyledons, hypocotyls and roots of seedlings during the first days after germination. Semi-quantitative and RT-qPCR experiments with genes of the key enzymes of two independent routes of the endogenous STL biosynthesis confirmed the early and individual expression in these organs and revealed a gradual down regulation during the first 72–96 h after germination. Light irradiation of the plants led to a fast, but transient increase of STL in parts of the hypocotyl which correlated with growth retardation of the stem. One-sided external application of costunolide on hypocotyls conferred reduced growth of the treated side, thus resulting in the curving of the stem towards the side of the application. This indicates the inhibiting effects of STL on plant growth. The putative function of endogenous STL in sunflower as antagonists of auxin in growth processes is discussed.
File is subject to an embargo until
This is a correction to:
A correction to this entry is available:
This is a new version of:
Other version
Notes
Publication license
Publication series
Published in
Planta, 252 (2020), 2.
https://doi.org/10.1007/s00425-020-03409-y.
ISSN: 1432-2048
Other version
Faculty
Institute
Examination date
Supervisor
Cite this publication
Spring, O., Schmauder, K., Lackus, N. D., Schreiner, J., Meier, C., Wellhausen, J., Smith, L. V., & Frey, M. (2020). Spatial and developmental synthesis of endogenous sesquiterpene lactones supports function in growth regulation of sunflower. Planta, 252. https://doi.org/10.1007/s00425-020-03409-y
Edition / version
Citation
DOI
ISSN
ISBN
Language
English
Publisher
Publisher place
Classification (DDC)
570 Biology
Collections
Original object
University bibliography
Standardized keywords (GND)
Sustainable Development Goals
BibTeX
@article{Spring2020,
url = {https://hohpublica.uni-hohenheim.de/handle/123456789/16344},
doi = {10.1007/s00425-020-03409-y},
author = {Spring, Otmar and Schmauder, Katharina and Lackus, Nathalie D. et al.},
title = {Spatial and developmental synthesis of endogenous sesquiterpene lactones supports function in growth regulation of sunflower},
journal = {Planta},
year = {2020},
volume = {252},
}