Cation signals rapidly elicited in several different plant species by pinching the leaves

Ries, S. K.; Widders, Irvin E.; Savithiry, Srinivasan; Wert, Violet; Baughan, Rebecca

doi:10.1093/jxb/45.3.367

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…A well documented response to injury in plant tissue is the opening of ion channels and the efflux of potassium (Spyropoulos et al 1961;Oda 1976;Hanson et al 1986;Davies 1987;Ries et al 1994) and chloride (Gaffey and Mullins 1958;Oda 1976). On the other hand, the increase in intracellular calcium (a second messenger in the transduction Wound-induced signals in Vitis Table 2.…”

Section: Nature and Characteristics Of The Vpmentioning

confidence: 99%

Hydraulic and electrical transmission of wound-induced signals in Vitis vinifera

Mancuso¹

1999

Functional Plant Biol.

101

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The nature and characteristics of the electrical response to wounding in the woody plant Vitis vinifera L. were examined. Following burning of a small area of a leaf, bioelectrical events spread throughout the shoot. The heat wound triggered stem deformations (widening–contraction), which preceded changes in biopotentials and that are interpreted as reflecting wound-induced hydraulic signals. It also caused marked decrease of extracellular resistance in stem tissues, starting about 15 s after stimulation, while intracellular resistance did not show any modification. Under an N2 atmosphere (hypoxic conditions), action potentials disappeared and the amplitude of variation potentials decreased approximately 50%. At saturating humidity variation potentials were completely eliminated, while action potentials were evident. Taken together, the results demonstrate that action and variation potentials differ both in their mechanism of propagation and electrogenic nature. Action potentials are ‘genuine’ self-propagating electrical signals travelling at a velocity of about 10 cm s-1, with a metabolic nature involving active components (electrogenic pumps). Variation potentials are a ‘local’ response to the passage of an hydraulic wave. Results support the hypothesis that both ion channels and pumps are involved in variation potential depolarisation.

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Section: Nature and Characteristics Of The Vpmentioning

confidence: 99%

Hydraulic and electrical transmission of wound-induced signals in Vitis vinifera

Mancuso¹

1999

Functional Plant Biol.

101

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“…root hairs; Lew, 1994) at any given time or for any given stimulus. Because calcium homeostasis and signaling are dependent on the physiological state of the cell (Gilroy et al, 1993;Johnson et al, 1995) and previous signals perceived (Ries et al, 1994), additional care was taken to harvest the buds at the same time each day and to use them within 30 min of harvest. Using plants grown in the Phytotron and the precautions noted above proved to be key factors in obtaining consistent responses.…”

Section: Ip3 Treatment Lnitiated Caz+ Fluctuationsmentioning

confidence: 99%

Mastoparan-Induced Intracellular Ca2+ Fluxes May Regulate Cell-to-Cell Communication in Plants

1996

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The relationship of CaZ+ and plasmodesmatal closure was examined in staminal hairs of Setcreasea purpurea by microinjecting cells with active mastoparan (Mas-7), inactive mastoparan (Mas-1 7), active inositol-1,4,5-trisphosphate (IP,), or inactive I P, . Calcium green dextran 10,000 was used to study cellular free Caz+, and carboxyfluorescein was used to monitor plasmodesmatal closure.When Mas-7 was microinjected into the cytoplasm of cell 1 (the tip cell of a chain of cells), a rapid increase i n calcium green dextran-10,000 fluorescence was observed in the cytoplasmic areas on both sides of the plasmodesmata connecting cells 1 and 2 during the same time that the diffusion of carboxyfluorescein through them was blocked. The inhibition of cell-to-cell diffusion was transient, and the closed plasmodesmata reopened within 30 s. The elevated Ca2+ level near plasmodesmata was also transient and returned t o base level in about 1.5 min. The transient increase in CaZ+, once initiated in cell 1, repeated with an oscillatory period of 3 min. Elevated Caz+ and oscillations of Caz+ were also observed near interconnecting cell walls throughout the chain of cells, indicating that the signal had been transmitted. Previously, we reported that IP, closed plasmodesmata; now we report that it stimulated Ca2+ and oscillations similar to Mas-7. The effect was specific for similar concentrations of Mas-7 over Mas-1 7 and active IP, over inactive IP,. It is important that the Ca2+ channel blocker La3+ eliminated the responses from Mas-7 and I P, , indicating that an influx of Ca2+ was required. These results support the contention that plasmodesmata functioning is regulated via Ca2+ and that IP, may be an intermediary between the stimulus and CaZ+ elevations.

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Rapid, Long-distance Signal Transmission in Higher Plants

Malone

1996

Advances in Botanical Research

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Cation signals rapidly elicited in several different plant species by pinching the leaves

Cited by 3 publications

References 17 publications

Hydraulic and electrical transmission of wound-induced signals in Vitis vinifera

Hydraulic and electrical transmission of wound-induced signals in Vitis vinifera

Mastoparan-Induced Intracellular Ca2+ Fluxes May Regulate Cell-to-Cell Communication in Plants

Rapid, Long-distance Signal Transmission in Higher Plants

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