AI Article Synopsis
- MAPK (Mitogen activated protein kinase) gets activated by stress signals to communicate between the cell membrane and the nucleus for cellular adjustments, with some baseline activity noted even in control plants.
- Prolonged exposure to temperature changes in rice plants revealed a rhythmic activation of MAPKs, demonstrating a diurnal pattern that persists even in constant dark conditions for up to 72 hours.
- Analysis using quantitative real-time PCR showed that specific MAPK groups (especially group C) exhibit a periodic rhythm, indicating that MAPK activity in rice operates on a circadian basis.
Article Abstract
Mitogen activated protein kinase (MAPK) are known to get activated during various stress signals and transduce the message from the cell membrane to the nucleus for appropriate cellular reorganization. Though, a certain basal activity of MAPK is often observed in the control plants. Prolonged exposure of rice plants to lowered or elevated temperature exhibited a rhythm in the activation of MAPKs. We analyzed existence of a possible endogenous rhythm in the activity of MAPKs in rice plants. The plants growing at constant temperature entrained in 16/8 h day-night cycle showed diurnal rhythm in activity. When the activation of MAPK was tested under continuous conditions by shifting plants to continuous darkness for a period of 72 h, the periodic rhythm persisted and followed a circadian pattern. Analysis of the transcripts of group A, B and C members of MAPKs under above conditions by quantitative real time PCR revealed that the members of group C exhibit periodic rhythm. Our data indicates that the MAP kinase activity in rice follows rhythmic expression in a circadian manner.
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| http://dx.doi.org/10.1007/s10059-009-0137-5 | DOI Listing |
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