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- Title
Role of ethylene and jasmonic acid on rhizome induction and growth in rhubarb ( Rheum rhabarbarum L.).
- Authors
Rayirath, Usha P.; Lada, Rajasekaran R.; Caldwell, Claude D.; Asiedu, Samuel K.; Sibley, Kevin J.
- Abstract
Experiments were conducted to elucidate the hormonal induction and regulation of rhizome growth in rhubarb ( Rheum rhabarbarum L.). It was found that ethylene is the key regulator of rhizome induction and development. The role of jasmonic acid (JA) and its interaction with ethylene in rhizome induction and growth were also examined. Both ethylene and JA have a significant effect on promoting rhizome formation in vitro. Conversely, the ethylene biosynthesis inhibitor aminoethoxyvinylglycine (AVG) (1.5 μM) inhibited rhizome induction in multiple-shoot clumps in vitro, and suppressed the stimulatory effects of exogenously applied ethephon (1 mg l) and JA (10 ng l) in promoting mini-rhizome formation, further confirming the role of endogenous ethylene in the process. In addition, rhizome growth was significantly enhanced in the presence of both ethylene and JA (ethephon 1 mg l and JA 10 ng l) compared to JA alone. These results suggest that endogenous ethylene is the key regulator of rhizome growth in rhubarb and JA promotes rhizome formation, possibly through inducing endogenous ethylene synthesis.
- Subjects
ETHYLENE; JASMONIC acid; RHUBARB; ETHEPHON; GENETIC regulation in plants; ENZYME induction; BIOCHEMICAL templates; PLANT growth regulation; PLANT growth inhibiting substances
- Publication
Plant Cell, Tissue & Organ Culture, 2011, Vol 105, Issue 2, p253
- ISSN
0167-6857
- Publication type
Article
- DOI
10.1007/s11240-010-9861-y