Advanced search
1 file | 965.69 KB

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 (UGent)
Author
Organization
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.
Keywords
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

Downloads

  • Zadnikova et al. 2015 Frontiers in Plants Science 6 218.pdf
    • full text
    • |
    • open access
    • |
    • PDF
    • |
    • 965.69 KB

Citation

Please use this url to cite or link to this publication:

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.
@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},
}

Altmetric
View in Altmetric
Web of Science
Times cited: