Systemic Responses Arising From Localized Heat Stimuli in Tomato Plants

Wildon, D. C.; Doherty, Helen; Eagles, G.; Bowles, Dianna J.; Thain, J. F.

doi:10.1093/oxfordjournals.aob.a087895

Cited by 48 publications

(32 citation statements)

References 8 publications

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“…This notion is further strengthened by the fact that SA down-regulated both the developmentally expressed and the induced transcripts. However, SA seems capable of affecting several putative gene-regulatory pathways (Dempsey and Klessig, 1995;Doares et al, 1995;Leslie and Romani, 1988;Pena-Cortes et al, 1993;Wildon et al, 1989).…”

Section: Discussionmentioning

confidence: 99%

Regulation of the Wound‐Induced Myrosinase‐Associated Protein Transcript in Brassica Napus Plants

Taipalensuu

Andréasson

Eriksson

et al. 1997

European Journal of Biochemistry

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Two slightly differing cDNA clones corresponding to the wound-inducible form of a previously characterized seed myrosinase-associated protein (MyAP) have been isolated from Brassica nupus L. The transcripts corresponding to the induced MyAP (iMyAP) were found to be developmentally regulated in various vegetative organs. Both young and old leaves exhibited wound-inducible iMyAP expression. Furthermore, in the young plant, wounding resulted in a systemic increase in leaves located both acropetally and basipetally to the wounded leaf. Also, the iMyAP transcripts were induced by methyl jasmonate, jasmonic acid and abscisic acid. The different inductions could be antagonized by salicylic acid. A general responsiveness in methyl-jasmonate-treated leaves was demonstrated by in situ hybridization. No effect on the amount of iMyAP transcript was detected after feeding the plants with the ethylene precursor 1-aminocyclopropane-1 -carboxylic acid. The similarity between MyAP and a lipase from Arubidopsis thuliana indicated a possible function in liberating acylated glucosinolates from their acyl group, thereby making them available for hydrolysis by the myrosinase enzymes. We also report on a reduction in the amount of myrosinase transcripts derived from the vegetatively expressed MB-gene family after treatment with exogenously applied salicylic acid or abscisic acid.

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Section: Discussionmentioning

confidence: 99%

Regulation of the Wound‐Induced Myrosinase‐Associated Protein Transcript in Brassica Napus Plants

Taipalensuu

Andréasson

Eriksson

et al. 1997

European Journal of Biochemistry

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“…Although heat treatment and mechanical damage have been demonstrated to generate electrical signals that may be propagated through the vascular tissue, thereby leading to the systemic activation of Pin2 gene expression (Wildon et al, 1989(Wildon et al, , 1992, no definitive evidente has been provided that shows that both stimuli are mediated by the same chain of events. Recently, gasexchange measurements of photosynthetic parameters such as assimilation and transpiration rates before, during, and after heat treatment, electric-current application, or mechanical damage demonstrated different classes of responses (Peiia-Cortés et al, 1995).…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, hydraulic and electrical signals, classified as physical signals, have been implicated in woundinduced gene expression. The appearance of variation potentials throughout most of the shoot has been reported following localized wounding by heating or burning (Pickard, 1973) in several plants (Wildon et al, 1989;Malone and Stankovic, 1991). Furthermore, Wildon et al (1992) reported that mechanical wounding and localized burning generate electrical signals that are propagated through the plant, thereby inducing Pin2 gene expression systemically.…”

mentioning

confidence: 94%

Localized Wounding by Heat Initiates the Accumulation of Proteinase Inhibitor II in Abscisic Acid-Deficient Plants by Triggering Jasmonic Acid Biosynthesis

et al. 1996

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To test whether the response to electrical current and heat treatment is due to the same signaling pathway that mediates mechanical wounding, we analyzed the effect of electric-current application and localized burning on proteinase inhibitor II (Pin2) gene expression in both wild-type and abscisic acid (ABA)-deficient tomato (Lycopersicon esculentum Mill.) and potato (Solanum phureja) plants. Electric-current application and localized burning led to the accumulation of Pin2 mRNA in potato and tomato wild-type plants. Among the treatments tested, only localized burning of the leaves led to an accumulation of Pin2 mRNA in the ABA-deficient plants. Electric-current application, like mechanical injury, was able to initiate ABA and jasmonic acid (JA) accumulation in wild-type but not in ABA-deficient plants. In contrast, heat treatment led to an accumulation of JA in both wild-type and ABA-deficient plants. Inhibition of JA biosynthesis by aspirin blocked the heat-induced Pin2 gene expression in tomato wild-type leaves. These results suggest that electric current, similar to mechanical wounding, requires the presence of ABA to induce Pin2 gene expression. Conversely, burning of the leaves activates Pin2 gene expression by directly triggering the biosynthesis of JA by an alternative pathway that is independent of endogenous ABA levels.

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“…These compounds are rather thought to be released from the wounded tissues as early signals in the pathway that ultimately leads to both localized and systemic wound-induced expression of the pin genes. Additional signaling mechanisms, such as electrical signals l h e Plant Cell (Wildon et al, 1989) and jasmonic acid (JA) derivatives (Farmer and Ryan, 1990), have also been postulated. l h e lipid-derived compound methyl jasmonate (MeJA), for example, when applied to tomato plants, was shown to act as a volatile signal inducing the accumulation of proteinase inhibitor proteins to even higher levels than those induced by wounding.…”

Section: Introductt Onmentioning

confidence: 99%

General roles of abscisic and jasmonic acids in gene activation as a result of mechanical wounding.

et al. 1992

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Exogenous application of abscisic acid (ABA) has been shown to induce a systemic pattern of proteinase inhibitor II (pin2) mRNA accumulation identical to that induced by mechanical wounding. Evidence is presented that the ABA-specific response is not restricted to pin2 genes but appears to,be part of a general reaction to wound stress. Four other woundinduced, ABAresponsive genes that encode two additional proteinase inhibitors, the proteolytic enqme leucine aminopeptidase, and the biosynthetic enzyme threonine deaminase were isolated from potato plants. Wounding or treatment with ABA resulted in a pattern of accumulation of these mRNAs very similar to that of pin2. ABA-deficient plants did not accumulate any of the mRNAs upon wounding, although they showed normal levels of expression upon ABA treatment. Also, application of methyl jasmonate (MeJA) induced a strong accumulation of these transcripts, both in wild-type and in ABA-deficient plants, thus supporting a role for jasmonic acid as an intermediate in the signaling pathway that leads from ABA accumulation in response to wounding to the transcriptional activation of the genes.

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Systemic Responses Arising From Localized Heat Stimuli in Tomato Plants

Cited by 48 publications

References 8 publications

Regulation of the Wound‐Induced Myrosinase‐Associated Protein Transcript in Brassica Napus Plants

Regulation of the Wound‐Induced Myrosinase‐Associated Protein Transcript in Brassica Napus Plants

Localized Wounding by Heat Initiates the Accumulation of Proteinase Inhibitor II in Abscisic Acid-Deficient Plants by Triggering Jasmonic Acid Biosynthesis

General roles of abscisic and jasmonic acids in gene activation as a result of mechanical wounding.

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