Endogenous Diurnal and Nocturnal Activity of Guard Cells as Indicated by Stomatal Aperture and Protoplasmic Streaming

Pallas, J. E.

doi:10.1111/j.1399-3054.1969.tb07409.x

Cited by 13 publications

(3 citation statements)

References 15 publications

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“…Now the total endogenous change in peanut photosynthesis seems to be correlated with stomatal movement. Endogenous change in stomatal aperture of a number of species has been described (10,11,20 Since chronologically maxima and minima in dark respiration approximate those of photosynthesis and transpiration (Fig. 4) (Fig.…”

Section: Discussionmentioning

confidence: 99%

Endogenous Rhythmic Activity of Photosynthesis, Transpiration, Dark Respiration, and Carbon Dioxide Compensation Point of Peanut Leaves

Pallas¹,

Samish²,

Willmer³

1974

Plant Physiol.

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At 14-hour day length, 25 C leaf temperature, 9 mm Hg vapor-pressure deficit, and 1.17 joules cm-' min-' irradiance, the diurnal change in daily photosynthesis of the cultivated peanut (Arachis hypogaea L.) is a result of an endogenously controlled circadian rhythm in net photosynthesis which peaks near noon and troughs near midnight. By resetting the daynight light regime, the rhythm rephased in continuous light. photosynthesis curves suggested endogenous rhythmic change in diffusive resistance or biochemical activity, or both, measurements of CO2 compensation point, dark respiration, and RuDP carboxylase activity were carried out for synchronization with the rhythmic change in net photosynthesis and transpiration. MATERIALS AND METHODSFor measurements of net photosynthesis, dark respiration, and CO, compensation, plants of Arachis hypogaea L. cv. Florigiant were grown in a fertilized peat-vermiculite medium in 5-inch plastic pots, under a controlled environment. This type media, because of its high water holding capacity (approximately 500%), minimized plant-soil-water stress as a factor in these studies. For RuDP carboxylase and transpiration studies, a large population was grown in the same medium but in deep wooden flats. Type 1 chambers (13) were programmed for 25 C, 60% relative humidity, and 350 ul CO2 liter-' air for 14-hr photoperiods, and 20 C, 90% relative humidity, and 400 /Ad CO2 liter-' air for 10-hr nyctoperiods (LD: 14, 10).' The light source for growth and experimentation consisted of a bank of VHO cool white fluorescents supplemented with incandescents with light intensities of 1.17 joules cm-2 min-' of total radiation, of which 49% was infrared.Usually plants were used when 3 or 4 weeks old. Except for temperature response studies, all net photosynthesis, dark respiration, and CO2 compensation point measurements were made at constant leaf temperatures of 25 C. Night temperatures of 25 C were maintained to assure soil temperature equilibrium. Vapor-pressure deficit was maintained at approximately 9 mm Hg.The net photosynthetic or dark respiration rates of plants were determined by measuring the amount of carbon dioxide supplied or removed per time interval to maintain CO2 at 300 ,ul/ 1 air in a sealed plant chamber. Windspeed in the chamber was >25 m/min. This semiclosed compensating system is described elsewhere (19). A special airtight Plexiglas chamber was fabricated to enclose the aboveground portion of 2-, 3-, or 4-week-old peanut plants. The tops of two plants were used simultaneously. The plants were sealed into the chamber with caulking gum around the stems. To prevent changes in leaf position due to "sleep" movements and to minimize self-shad-

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Section: Discussionmentioning

confidence: 99%

Endogenous Rhythmic Activity of Photosynthesis, Transpiration, Dark Respiration, and Carbon Dioxide Compensation Point of Peanut Leaves

Pallas¹,

Samish²,

Willmer³

1974

Plant Physiol.

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“…Mansfield and Heath (1961). Stalfelt (1963) and Pallas (1969) suggest that night opening of stomata is caused by endogenous rhythms that occur within guard cells. However, the results of the present study suggest that K is involved in the night opening of stomata.…”

Section: Discussionmentioning

confidence: 99%

The Effect of Potassium Deficiency on Stomatal and Cuticular Resistance in Tea (Camellia sinensis)

Nagarajah

1979

Physiologia Plantarum

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The effect of potassium deficiency on cuticular resistance and diurnal variation in stomatal diffusive resistance was studied in tea (Camellia sinensis). The plants were grown in sand and potassium deficiency induced by withholding the supply of potassium. The results showed that during the day potassium‐deficient leaves had a higher stomatal diffusive resistance than control leaves. However when solar radiation was reduced by clouds the stomatal diffusive resistance in both control and potassium‐deficient leaves was not significantly different. Night opening of stomata was observed in both control and potassium‐deficient leaves, but noticeably lower in the latter. Potassium‐deficient leaves had a lower cuticular resistance than control leaves.

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“…Such nocturnal oscillations have been reported for bean (Hopmans 1971) and for rough lemon (Ehrler 1971), in both cases with a period of the order of 100 min. Pallas (1969) reported on nocturnal variations in stomatal aperture of different species but the period of these variations seems to be several hours and the number of cycles was very small. These variations might therefore be of a different character to the previous type of nocturnal oscillations.…”

Section: Introductionmentioning

confidence: 99%

Oscillatory Transpiration and Water Uptake of Avena Plants

Klockare

Johnsson²,

Brogårdh³

et al. 1978

Physiologia Plantarum

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The transpiration rate of oat plants, 6 days old, has been investigated. Dependent on the irradiance level of the white light used in the experiments, the transpiration rate oscillated with different period times. In darkness or at low irradiances the period was about 100–110 min. At higher irradiances the period was about 40 min. At intermediate irradiances autocorrelation analysis was used to find the period content of the transpiration rate. It was concluded that two oscillatory systems were present in the plants, characterized by their different periods. When plants cultivated in a light/dark cycle were used, the transpiration oscillations were influenced by a circadian rhythm. Oscillations in darkness were then most pronounced in the mornings. Plants cultivated in continuous light did not show such a circadian rhythm, but the oscillations died out after about 20 h. Kinetin induced transpiration oscillations in darkness and made them sustain for a longer time.

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Endogenous Diurnal and Nocturnal Activity of Guard Cells as Indicated by Stomatal Aperture and Protoplasmic Streaming

Cited by 13 publications

References 15 publications

Endogenous Rhythmic Activity of Photosynthesis, Transpiration, Dark Respiration, and Carbon Dioxide Compensation Point of Peanut Leaves

Endogenous Rhythmic Activity of Photosynthesis, Transpiration, Dark Respiration, and Carbon Dioxide Compensation Point of Peanut Leaves

The Effect of Potassium Deficiency on Stomatal and Cuticular Resistance in Tea (Camellia sinensis)

Oscillatory Transpiration and Water Uptake of Avena Plants

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