Electrical Signals, the Cytoskeleton, and Gene Expression: a Hypothesis on the Coherence of the Cellular Responses to Environmental Insult - Communication in Plants: Neuronal Aspects of Plant Life - page 317

Table 21.1. The first 10 min: early events following heat-wounding a leaf of a tomato plant

Duration (s) Response Effect Reference

< 1 Loss of xylem tension Systemic awareness Davies et al. (1991)

throughout the plant of perturbation

1-3 Mechano-sensing Local awareness Davies (1993),

calcium channels open of perturbation Fisahn et al. (2004)

3-10 Calcium influx Binds to Roberts and

into the cytoplasm calcium-binding Harmon (1992),

proteins on MF Davies et al. (1996)

5-15 Activation “Current” Davies (1993),

of microfilament- of phosphorylation Wang et al. (2004)

linked CDPK along MF

5-15 Phosphorylation Prevents Davies et al. (1996)

(inactivation) cytoplasmic

of myosin streaming

5-15 Phosphorylation Stops translation, Ryazanov et al. (1988),

(inactivation) ribosomes protect Shestakova et al. (1991)

of EF2 host mRNA

5-15 Phosphorylation Makes error-ridden Landick (2004),

(activation) mRNA, goes Hofmann et al. (2004)

of pol2 into cytoplasm

30-120 Mismade RNA Competes with viral Landick (2004)

accumulates RNA for ribosomes

120-500 Ca activation Degrades Larkins and

of RNase unprotected viral Davies (1973)

and mismade RNA

120-500 Disappearance Newly made mRNA Fig. 21.4

of newly-made RNA never translated

3-10 Calcium influx Binds Roberts and

into the cytoplasm to calcium-binding Harmon (1992)

proteins near PM

5-15 Activation of Releases IP3 Heilmann et al. (2001)

phospholipase C from membranes

20-60 IP3 passes from cell Calcium released from Heilmann et al. (2001)

to cell internal stores

30-120 IP3/Ca stimulates Mismade Salinas-Mondragón

RNA synthesis transcripts et al. (2001),

accumulate York et al. (1999)

120-600 Activation Degrades Larkins and

of RNase unprotected viral Davies (1973)

and mismade RNA

120-600 Disappearance Newly made Fig. 21.4

of newly mRNA never

made RNA translated

MF microfilament, CDPK calcium-dependent protein kinase, pol2 RNA polymerase II,
mRNA messenger RNA, PM plasma membrane