Regulation of Phospho<i>enol</i>pyruvate Carboxylase and Crassulacean Acid Metabolism Induction in <i>Mesembryanthemum crystallinum</i> L. by Cytokinin

Schmitt, Jürgen; Piepenbrock, Mechtild

doi:10.1104/pp.99.4.1664

Cited by 63 publications

(41 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Other plant growth regulators such as cytokinins have been shown to either suppress or enhance PEPC expression depending on the mode of application (Schmitt and Piepenbrock, 1992;Thomas et al, 1992;Thomas and Bohnert, 1993;Dai et al, 1994;Peters et al, 1997). Cytokinin applied to roots causes an enhancement in PEPC expression, whereas foliar application of intact plants or feeding to detached leaves suppresses PEPC expression and prevents PEPC induction by drought or salinity stress (Schmitt and Piepenbrock, 1992;Dai et al, 1994;Peters et al, 1997). Endogenous cytokinin levels are negatively correlated with Ppc1 transcripts during dehydration stress, suggesting that cytokinins act as negative effectors in the expression of CAM (Peters et al, 1997).…”

mentioning

confidence: 99%

“…Endogenous increases or exogenous application of ABA result in CAM induction (Dai et al, 1994;Taybi et al, 1995) by stimulating increased expression of key CAM enzymes such as PEPC (Chu et al, 1990;Dai et al, 1994;Taybi et al, 1995), enolase (Forsthoefel et al, 1995a), phosphoglyceromutase (Forsthoefel et al, 1995b), and vacuolar ATPase subunit c (Tsiantis et al, 1996). Other plant growth regulators such as cytokinins have been shown to either suppress or enhance PEPC expression depending on the mode of application (Schmitt and Piepenbrock, 1992;Thomas et al, 1992;Thomas and Bohnert, 1993;Dai et al, 1994;Peters et al, 1997). Cytokinin applied to roots causes an enhancement in PEPC expression, whereas foliar application of intact plants or feeding to detached leaves suppresses PEPC expression and prevents PEPC induction by drought or salinity stress (Schmitt and Piepenbrock, 1992;Dai et al, 1994;Peters et al, 1997).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Signaling Events Leading to Crassulacean Acid Metabolism Induction in the Common Ice Plant

Taybi

Cushman

1999

Plant Physiology

View full text Add to dashboard Cite

A rapid, semiquantitative reverse transcriptase-polymerase chain reaction assay was developed to investigate signal transduction events involved in the induction of Crassulacean acid metabolism (CAM) in detached common ice plant (Mesembryanthemum crystallinum) leaves. Transcript abundance of Ppc1, a gene encoding the CAM-specific isoform of phosphoenolpyruvate carboxylase, increased rapidly in response to osmotic stress (dehydration and mannitol), ionic stress (NaCl), and exogenous abscisic acid treatment, but failed to accumulate in response to exogenous cytokinin or methyl jasmonate. Stress-induced accumulation of Ppc1, GapC1, and

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

Signaling Events Leading to Crassulacean Acid Metabolism Induction in the Common Ice Plant

Taybi

Cushman

1999

Plant Physiology

View full text Add to dashboard Cite

show abstract

“…Despite the changes in leaf water content seen in C3-type plants, changes in PEPCase mRNA abundance are not observed (Schmitt & Piepenbrock 1992). These data imply that the induction of PEPCase might be suppressed hy a signal originating from outside the leaf (Schmitt & Piepenbrock 1992).…”

Section: Discussionmentioning

confidence: 72%

“…Interestingly, exogenously applied ABA and eytokinin have also been shown to influence CAM expression in M. crystaltittiim (Chu et at. 1990;Schmitt & Piepenbrock 1992;Thomas et al 1992). The possible involvement of these growth regulators in CAM induction has lead a number of authors to speculate that they might act as root-derived messengers, modulating the expression of the CAM pathway in response lo changing lool water status Schmitt & Piepenbrock 1992;Thomas & Bohnert 1993).…”

Section: Introductionmentioning

confidence: 99%

“…1990;Schmitt & Piepenbrock 1992;Thomas et al 1992). The possible involvement of these growth regulators in CAM induction has lead a number of authors to speculate that they might act as root-derived messengers, modulating the expression of the CAM pathway in response lo changing lool water status Schmitt & Piepenbrock 1992;Thomas & Bohnert 1993). Despite these suggestions, no direct evidence has been provided lor the involvement of root-to-shoot eommunication in CAM induction.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evidence that the induction of crassulacean acid metabolism by water stress in Mesembryanthemum crystallinum (L.) involves root signalling

Eastmond

Ross

1997

Plant Cell & Environment

View full text Add to dashboard Cite

The aim of this study was to investigate whether the root system of Mesembryanttieinuin crystattimim (L.) plays a role in triggering the induction of crassulacean acid metabolism (CAM) during water stress. Depriving wellirrigated plants of water, by allowing the soil surrounding the roots to dry, caused increased daily losses in leaf relative water content (RWC) and mesophyll cell turgor pressure. The RWC of the roots also declined. Subsequently plants exhibited physiological characteristics of CAM photosynthesis (i.e. diurnal fluctuations in leaf titratable acidity and nocturnal net CO2 fixation). When the root system of plants was divided equally between two soil compartments and one half deprived of water, plants exhibited physiological characteristics of CAM without prior changes in leaf RWC content or mesophyll cell turgor pressure. Only the RWC of the water-stressed portion of the roots was reduced. These data suggest that in waterstressed plants daily changes in leaf water relations greater than those observed in well-irrigated plants, are not essential to trigger CAM expression. It is probable that a reduction in soil water availability can be perceived by the roots of M. crystattiiium and that this information is conveyed to the leaves triggering the transition from C, to CAM photosynthesis.Kev-worcts: Mesetnbryatititcttttttn ctystattiiuitn; crassulacean acid metabolism; root signalling; water stress.

show abstract

C₃ photosynthesis in the gametophyte of the epiphytic CAM fern Pyrrosia longifolia (Polypodiaceae)

Martin

Allen

Haufler

1995

American J of Botany

View full text Add to dashboard Cite

Sporophytes of some epiphytic species in the fern genus Pyrrosia exhibit Crassulacean acid metabolism (CAM), generally considered to be a derived physiological response to xeric habitats. Because these species alternate between independent sporophytic and gametophytic generations yet only the sporophyte has been characterized physiologically, experiments were conducted to determine the photosynthetic pathways present in mature sporophytes, immature sporophytes, and gametophytes of Pyrrosia longifolia. Diurnal C0 2 exchange and malic acid fluctuations demonstrated that although the mature sporophytes exhibited CAM, only C 3 photosynthesis occurred in the gametophytes and young sporophytes. Consideration of the above results and those from previous studies, as well as the life cycle of ferns, indicates that the induction of CAM probably occurs at a certain developmental stage of the sporophyte and/or following exposure to stress. Elucidation of the precise mechanisms underlying this C^-CAM transition awaits further research.

show abstract

Regulation of Phosphoenolpyruvate Carboxylase and Crassulacean Acid Metabolism Induction in Mesembryanthemum crystallinum L. by Cytokinin

Cited by 63 publications

References 25 publications

Signaling Events Leading to Crassulacean Acid Metabolism Induction in the Common Ice Plant

Signaling Events Leading to Crassulacean Acid Metabolism Induction in the Common Ice Plant

Evidence that the induction of crassulacean acid metabolism by water stress in Mesembryanthemum crystallinum (L.) involves root signalling

C₃ photosynthesis in the gametophyte of the epiphytic CAM fern Pyrrosia longifolia (Polypodiaceae)

Contact Info

Product

Resources

About

Regulation of Phosphoenolpyruvate Carboxylase and Crassulacean Acid Metabolism Induction in Mesembryanthemum crystallinum L. by Cytokinin

Cited by 63 publications

References 25 publications

Signaling Events Leading to Crassulacean Acid Metabolism Induction in the Common Ice Plant

Signaling Events Leading to Crassulacean Acid Metabolism Induction in the Common Ice Plant

Evidence that the induction of crassulacean acid metabolism by water stress in Mesembryanthemum crystallinum (L.) involves root signalling

C3 photosynthesis in the gametophyte of the epiphytic CAM fern Pyrrosia longifolia (Polypodiaceae)

Contact Info

Product

Resources

About

C₃ photosynthesis in the gametophyte of the epiphytic CAM fern Pyrrosia longifolia (Polypodiaceae)