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Strategies of seedlings to overcome their sessile nature: auxin in mobility control

Petra Zadnikova UGent, Dajo Smet UGent, Qiang Zhu UGent, Dominique Van Der Straeten UGent and Eva Benkova (2015) FRONTIERS IN PLANT SCIENCE. 6.
abstract
Plants are sessile organisms that are permanently restricted to their site of germination. To compensate for their lack of mobility, plants evolved unique mechanisms enabling them to rapidly react to ever changing environmental conditions and flexibly adapt their postembryonic developmental program. A prominent demonstration of this developmental plasticity is their ability to bend organs in order to reach the position most optimal for growth and utilization of light, nutrients, and other resources. Shortly after germination, dicotyledonous seedlings form a bended structure, the so-called apical hook, to protect the delicate shoot meristem and cotyledons from damage when penetrating through the soil. Upon perception of a light stimulus, the apical hook rapidly opens and the photomorphogenic developmental program is activated. After germination, plant organs are able to align their growth with the light source and adopt the most favorable orientation through bending, in a process named phototropism. On the other hand, when roots and shoots are diverted from their upright orientation, they immediately detect a change in the gravity vector and bend to maintain a vertical growth direction. Noteworthy, despite the diversity of external stimuli perceived by different plant organs, all plant tropic movements share a common mechanistic basis: differential cell growth. In our review, we will discuss the molecular principles underlying various tropic responses with the focus on mechanisms mediating the perception of external signals, transduction cascades and downstream responses that regulate differential cell growth and consequently, organ bending. In particular, we highlight common and specific features of regulatory pathways in control of the bending of organs and a role for the plant hormone auxin as a key regulatory component.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (review)
publication status
published
subject
keyword
B-INDUCED PHOTOMORPHOGENESIS, SIGNAL-TRANSDUCTION PATHWAY, DIFFERENTIAL CELL ELONGATION, ARABIDOPSIS-THALIANA SEEDLINGS, PHYTOCHROME-INTERACTING FACTORS, STARCH-DEFICIENT MUTANTS, APICAL HOOK DEVELOPMENT, hormonal crosstalk, gravitropism, phototropism, apical hook, auxin, differential growth, LATERAL ROOT-FORMATION, D6 PROTEIN-KINASE, BLUE-LIGHT
journal title
FRONTIERS IN PLANT SCIENCE
Front. Plant Sci.
volume
6
article number
218
pages
19 pages
Web of Science type
Review
Web of Science id
000353577800001
JCR category
PLANT SCIENCES
JCR impact factor
4.495 (2015)
JCR rank
15/209 (2015)
JCR quartile
1 (2015)
ISSN
1664-462X
DOI
10.3389/fpls.2015.00218
language
English
UGent publication?
yes
classification
A1
additional info
the first two authors contributed equally to this work
copyright statement
I have retained and own the full copyright for this publication
id
6929931
handle
http://hdl.handle.net/1854/LU-6929931
date created
2015-09-14 16:02:45
date last changed
2017-03-02 13:56:32
@article{6929931,
  abstract     = {Plants are sessile organisms that are permanently restricted to their site of germination. To compensate for their lack of mobility, plants evolved unique mechanisms enabling them to rapidly react to ever changing environmental conditions and flexibly adapt their postembryonic developmental program. A prominent demonstration of this developmental plasticity is their ability to bend organs in order to reach the position most optimal for growth and utilization of light, nutrients, and other resources. Shortly after germination, dicotyledonous seedlings form a bended structure, the so-called apical hook, to protect the delicate shoot meristem and cotyledons from damage when penetrating through the soil. Upon perception of a light stimulus, the apical hook rapidly opens and the photomorphogenic developmental program is activated. After germination, plant organs are able to align their growth with the light source and adopt the most favorable orientation through bending, in a process named phototropism. On the other hand, when roots and shoots are diverted from their upright orientation, they immediately detect a change in the gravity vector and bend to maintain a vertical growth direction. Noteworthy, despite the diversity of external stimuli perceived by different plant organs, all plant tropic movements share a common mechanistic basis: differential cell growth. In our review, we will discuss the molecular principles underlying various tropic responses with the focus on mechanisms mediating the perception of external signals, transduction cascades and downstream responses that regulate differential cell growth and consequently, organ bending. In particular, we highlight common and specific features of regulatory pathways in control of the bending of organs and a role for the plant hormone auxin as a key regulatory component.},
  articleno    = {218},
  author       = {Zadnikova, Petra and Smet, Dajo and Zhu, Qiang and Van Der Straeten, Dominique and Benkova, Eva},
  issn         = {1664-462X},
  journal      = {FRONTIERS IN PLANT SCIENCE},
  keyword      = {B-INDUCED PHOTOMORPHOGENESIS,SIGNAL-TRANSDUCTION PATHWAY,DIFFERENTIAL CELL ELONGATION,ARABIDOPSIS-THALIANA SEEDLINGS,PHYTOCHROME-INTERACTING FACTORS,STARCH-DEFICIENT MUTANTS,APICAL HOOK DEVELOPMENT,hormonal crosstalk,gravitropism,phototropism,apical hook,auxin,differential growth,LATERAL ROOT-FORMATION,D6 PROTEIN-KINASE,BLUE-LIGHT},
  language     = {eng},
  pages        = {19},
  title        = {Strategies of seedlings to overcome their sessile nature: auxin in mobility control},
  url          = {http://dx.doi.org/10.3389/fpls.2015.00218},
  volume       = {6},
  year         = {2015},
}

Chicago
Zadnikova, Petra, Dajo Smet, Qiang Zhu, Dominique Van Der Straeten, and Eva Benkova. 2015. “Strategies of Seedlings to Overcome Their Sessile Nature: Auxin in Mobility Control.” Frontiers in Plant Science 6.
APA
Zadnikova, P., Smet, D., Zhu, Q., Van Der Straeten, D., & Benkova, E. (2015). Strategies of seedlings to overcome their sessile nature: auxin in mobility control. FRONTIERS IN PLANT SCIENCE, 6.
Vancouver
1.
Zadnikova P, Smet D, Zhu Q, Van Der Straeten D, Benkova E. Strategies of seedlings to overcome their sessile nature: auxin in mobility control. FRONTIERS IN PLANT SCIENCE. 2015;6.
MLA
Zadnikova, Petra, Dajo Smet, Qiang Zhu, et al. “Strategies of Seedlings to Overcome Their Sessile Nature: Auxin in Mobility Control.” FRONTIERS IN PLANT SCIENCE 6 (2015): n. pag. Print.