Light modulates the root tip excision induced lateral root formation in tomato

During plant growth and development, root tip performs multifarious functions integrating diverse external and internal stimuli to regulate root elongation and architecture. It is believed that a signal originating from root tip inhibits lateral root formation (LRF). The excision of root tip induced...

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Bibliographic Details
Published in:Plant signaling & behavior 2014-10, Vol.9 (10), p.e970098
Main Authors: Thomas, Sherinmol, Sreelakshmi, Yellamaraju, Sharma, Rameshwar
Format: Article
Language:English
Subjects:
auxin
auxins
cotyledons
ethylene
Ethylenes - pharmacology
lateral roots
Light
Meristem - drug effects
Meristem - growth & development
Meristem - radiation effects
Organogenesis - drug effects
Organogenesis - radiation effects
plant development
root growth
root tip dominance
root tips
seedlings
Seedlings - drug effects
Seedlings - growth & development
Seedlings - radiation effects
shoots
Short Communication
Solanum lycopersicum
Solanum lycopersicum - drug effects
Solanum lycopersicum - growth & development
Solanum lycopersicum - radiation effects
tomato
tomatoes
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Summary:During plant growth and development, root tip performs multifarious functions integrating diverse external and internal stimuli to regulate root elongation and architecture. It is believed that a signal originating from root tip inhibits lateral root formation (LRF). The excision of root tip induced LRF in tomato seedlings associated with accumulation of auxin in pericycle founder cells. The excision of cotyledons slightly reduced LRF, whereas severing shoot from root completely abolished LRF. Exogenous ethylene application did not alter LRF. The response was modulated by light with higher LRF in seedlings exposed to light. Our results indicate that light plays a role in LRF in seedlings by likely modulating shoot derived auxin.
ISSN:1559-2316
1559-2324
1559-2324
DOI:10.4161/15592316.2014.970098