Chlorophyll fluorescence as an exploratory tool for ecophysiological studies on mosses and other small poikilohydric plants

Tuba, Zoltán; Csintalan, Zsolt; Badacsonyi, András; Proctor, M. C. F.

doi:10.1179/jbr.1997.19.3.401

Cited by 18 publications

(9 citation statements)

References 28 publications

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“…The cryptogamic plant transplantation bioindication method of Tuba and Csintalan was applied Csintalan 1992, 1993a, b;Tuba et al 1994Tuba et al , 1997 using the moss Tortula ruralis (Hedw.) Geartn.…”

Section: Methodsmentioning

confidence: 99%

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Comparison of two metal surveys by moss Tortula ruralis in Budapest, Hungary

Naszradi

Badacsonyi

Keresztényi

et al. 2007

Environ Monit Assess

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Moss transplants of Tortula ruralis were used as active biomonitoring organisms as part of a monitoring study to assess the metals (Al, Cd, Cu, Cr, Fe, Ni, Pb, V and Zn) associated with ambient particles on mosses in Budapest, the capital town of Hungary. The moss samples were collected in a nature conservation area from a semi-arid sand grassland (Festucetum vaginatae danubiale), less than 1 month before transplantation. Moss cushions were exposed to pollution in Budapest during October-November 1993 and February-March 1994. In the study area, 16 sites were marked out as measuring sites, in accordance with the structure of the city. A similar stand was established in the Botanical Gardens of the Szent István University in Gödöllo as a control site. ICP-AES analysis of moss for metals showed the ability of Tortula ruralis to accumulate the metals under study. Control site showed lower impact in comparison to the other sites.

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Section: Methodsmentioning

confidence: 99%

“…For the above purpose, the moss bioindication method developed by Tuba and Csintalan was applied Csintalan 1992, 1993a;Tuba et al 1994Tuba et al , 1997. The concentrations of nine elements (Al, Cd, Cr, Cu, Fe, Ni, Pb, Vand Zn) were measured at several locations in the city.…”

Section: Introductionmentioning

confidence: 99%

Comparison of two metal surveys by moss Tortula ruralis in Budapest, Hungary

Naszradi

Badacsonyi

Keresztényi

et al. 2007

Environ Monit Assess

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“…The effective quantum yield (⌽ PSII ) can be estimated under ambient light conditions by measuring the ratio of the additional fluorescence yield achieved above the steady state value relative to the maximal yield (⌽ PSII ϭ ⌬F/F m Ј; Genty et al, 1989;Maxwell and Johnson, 2000). Variation in ⌬F/F m Ј relates to differences in net photosynthesis in bryophytes (Tuba et al, 1997;Csintalan et al, 1999;Marschall and Proctor, 1999). This parameter was measured using a 5.5-mm fiber optic probe interfaced with a modulated fluorometer (MINI-PAM Fluorometer, Walz, Effeltrich, Germany) at three sample points on each cushion following each photosynthesis measurement.…”

Section: Methodsmentioning

confidence: 99%

“…Initially, plants were assessed for the Fv/F m fluorescence parameter following dark adaptation, which correlates well with photosynthetic capacity (Tuba et al, 1997;Csintalan et al, 1999;Maxwell and Johnson, 2000). This was accomplished by performing measurements on cushions at night at the beginning of the experiment.…”

Section: Methodsmentioning

confidence: 99%

Cushion size, surface roughness, and the control of water balance and carbon flux in the cushion mossLeucobryum glaucum(Leucobryaceae)

Rice

Schneider

2004

American J of Botany

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We explored the size dependence of water balance and carbon flux in the cushion moss Leucobryum glaucum (Leucobryaceae). Conductance to water vapor (g(a)) was modeled empirically using 4-24 cm diameter cushions (N = 14) evaluated across wind speeds from 0.7 to 4.3 m/s in a wind tunnel. Model parameters included wind speed (u), kinematic viscosity (v), cushion diameter (L(d)), and surface roughness (L(r)). The model g(a) = -9.62(u/v)(1.21) · L(d)(-0.35) · L(r-in)(-1.85) (where L(r-in) represents a dimensionless form of L(r); R(2) = 0.88) indicates negative relationships between g(a) and both L(d) and L(r). These predictions were evaluated during a 5-d field experiment where water loss and net carbon exchange (estimated by ΔF/F(m)') were monitored. In the field (N = 18, 4-34 cm diameter cushions), L(r), but not L(d), controlled rates of evaporation due to additional turbulence that reduced size dependence of cushions along the forest floor. However, the duration of positive net carbon gain varied from 1.4 to 4.4 d and was significantly longer in larger diameter cushions. Thus, under field conditions, size-dependent changes in surface-area-to-volume relationships influence the duration of net carbon gain more than differences in water flux and lead to a strong size dependence of water balance and carbon flux.

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“…It may drive photochemical processes (primarily photosynthetic carbon fixation), it may be re-emitted as far-red fluorescence, or it may be dissipated as heat. By manipulating the illumination of the sample and simultaneously measuring the chlorophyll fluorescence, these components can be distinguished, yielding in a non-invasive way much information about the photosynthetic activity of the plant (Jones, 1992;Schreiber, Bilger & Neubauer, 1995;Tuba et al, 1997). The measurements for Figs 2-5 were made using a pulse amplitude modulation (PAM) fluorometer (Walz, Effeltrich, Germany, model PAM 101-102-103); the data for Fig.…”

Section: Methodsmentioning

confidence: 99%

Desiccation tolerance and recovery of the leafy liverwortPorella platyphylla(L.)Pfeiff.: chlorophyll-fluorescence measurements

Marschall¹,

Proctor²

1999

Journal of Bryology

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Modulated chlorophyll fluorometry demonstrated rapid and complete recovery of maximum and effective quantum yield (Fv/Fm and PSII)on remoistening after 7 days in an air-dry state. Both parameters returned to pre-desiccation values within 2 h in either darkness or light (PPFD 100 ,umol m-2 S-l), and the period of desiccation appeared as only a transitory interruption of normal photosynthetic function. In the course of drying both parameters declined as cell water content fell below full turgor, steeply so below RWC = 0.5, but photochemical quenching was little affected. Increase in non-photochemical quenching (NPQ) under water stress was almost all in the slow-relaxing ('photoinhibitory') component. During recovery in light, NPQ increased strongly with peaks at 2-3 hand 7-8 h (in both fast and slowrelaxing components), returning to pre-desiccation levels within 24 h. Progressive fall in NPQ during recovery in the dark was mostly due to decline in the slow-relaxing component. The results suggest that desiccation tolerance in Porella platyphylla is essentially constitutive. Increased photoprotection during recovery in light may reflect 'repair' processes which are essentially complete within 24 h.

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Chlorophyll fluorescence as an exploratory tool for ecophysiological studies on mosses and other small poikilohydric plants

Cited by 18 publications

References 28 publications

Comparison of two metal surveys by moss Tortula ruralis in Budapest, Hungary

Comparison of two metal surveys by moss Tortula ruralis in Budapest, Hungary

Cushion size, surface roughness, and the control of water balance and carbon flux in the cushion mossLeucobryum glaucum(Leucobryaceae)

Desiccation tolerance and recovery of the leafy liverwortPorella platyphylla(L.)Pfeiff.: chlorophyll-fluorescence measurements

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