Temperature and light dependent modifications of chlorophyll fluorescence kinetics in spruce needles during winter

Bolhàr‐Nordenkampf, H. R.; Lechner, Elisabeth

doi:10.1007/bf00034833

Cited by 39 publications

(13 citation statements)

References 16 publications

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“…An inhibition of photochemical efficiency of plants upon exposure to low (chilling) temperature was reported in spruce by Bolhàr-Nordenkampf and Lechner (1988) or in spinach by Somersalo and Krause (1990) when grown in the field during winter. The OP plants showed a considerable reduction in the F v /F m at midday probably on account of photoinhibition.…”

Section: Recovery Of Plantsmentioning

confidence: 91%

Differences in photosynthetic characteristics and accumulation of osmoprotectants in saplings of evergreen plants grown inside and outside a glasshouse during the winter season

2007

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Photochemical efficiency, photosynthetic capacity, osmoprotectants, and relative water content (RWC) were recorded in saplings of two evergreen plants (Boehmeria rugulosa Wedd. and Olea glandulifera Wall. ex G. Don) grown inside (GL) and outside (OP) a glasshouse during the winter season. The OP plants experienced 2.0-2.5 o C lower air temperature and dew formation in comparison to GL plants. Diurnal observations indicated no change in RWC in the leaves of GL and OP plants, while significant reduction in both transpiration and net photosynthetic (P N ) rates was observed in OP plants: the reduction in P N was much more prominent as was also reflected by poor water use efficiency of these plants. Similarly, OP plants also showed decrease in the apparent quantum yield and irradiance-saturated CO 2 assimilation rate. The decrease in P N was not associated with decreased stomatal conductance. However, a significant reduction in the ratio of variable to maximum chlorophyll (Chl) fluorescence (F v /F m ) and Chl content was recorded in the OP plants which also contained more total soluble saccharides but less proline contents. The greater enhancement of P N at 15 o C in comparison to measurements taken at 10 o C in OP plants over GL plants probably indicated an increase in mesophyll capacity of the OP plants' growth at increased temperature. Hence the enhanced growth and productivity of plants grown in sheltered environments could be associated to their higher photosynthetic activity that may have important bearing on their field establishment and productivity in the long run. The response varied with plant species; reduction in P N was greater in B. rugulosa than in O. glandulifera. However, the recovery of OP plants in terms of F v /F m in the subsequent months revealed that photosynthetic system of these plants is revocable.

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Section: Recovery Of Plantsmentioning

confidence: 91%

Differences in photosynthetic characteristics and accumulation of osmoprotectants in saplings of evergreen plants grown inside and outside a glasshouse during the winter season

2007

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“…In climatic zones with mild winters, the seasonal variations are smaller than in zones with more severe winter conditions with prevailing temperatures well below zero. These seasonal variations are exemplified in studies of conifers such as Norway spruce (14,19,53,68,106), Scotch pine (44,54,64,116,123), ponderosa pine (Pinus ponderosa) (122), and Douglas fir (Pseudotsuga menziesii) (120). Similar fluctuations are observed in lichen (70,71) as well as broad-leaved sclerophyllous species like holly (Ilex aquifolium) (40), ivy (Hedera helix) (80), eucalyptus (E. pauciflora) (17,103), periwinkle spreading euonymus (Vinca minor) (2, 48), (Euonymus kiautschovicus) (121), and creeping mahonia (Mahonia repens) (67).…”

Section: Seasonal Variations In Photosynthesismentioning

confidence: 98%

Photosynthesis of Overwintering Evergreen Plants

Öquist

Hüner

2003

Annu. Rev. Plant Biol.

500

123

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In this review we focus on photosynthetic behavior of overwintering evergreens with an emphasis on both the acclimative responses of photosynthesis to cold and the winter behavior of photosynthesis in conifers. Photosynthetic acclimation is discussed in terms of the requirement for a balance between the energy absorbed through largely temperature-insensitive photochemical processes and the energy used for temperature-sensitive biochemical processes and growth. Cold acclimation transforms the xanthophyll-mediated nonphotochemical antenna quenching of absorbed light from a short-term dynamic response to a long-term sustained quenching for the whole winter period. This acclimative response helps protect the evergreen foliage from photooxidative damage during the winter when photosynthesis is restricted or prevented by low temperatures. Although the molecular mechanisms behind the sustained winter excitation quenching are largely unknown, it does involve major alterations in the organization and composition of the photosystem II antenna. In addition, photosystem I may play an important role in overwintering evergreens not only by quenching absorbed light photochemically via its support of cyclic electron transport at low temperatures, but also by nonphotochemical quenching of absorbed light irrespective of temperature. The possible role of photosystem II reaction centers in nonphotochemical quenching of absorbed energy in overwintering evergreens is also discussed. Processes like chlororespiration and cyclic electron transport may also be important for maintaining the functional integrity of the photosynthetic apparatus of overwintering evergreens both during periods of thawing in winter and during recovery from winter stress in spring. We suggest that the photosynthetic acclimation responses of overwintering evergreens represent specific evolutionary adaptations for plant species that invest in the long-term maintenance of leaf structure in cold climatic zones as exemplified by the boreal forests of the Northern Hemisphere.

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“…Pretreatment of samples prior to measurement has been advocated by some (Bolhar-Nordenkampf and Lechner, 1988;Lichtenthaler and Rinderle, 1988), and entails incubation under standardized conditions of light, temperature, and possibly relative humidity, for specified periods prior to analysis of CF. This would only apply to samples harvested in the field for subsequent lab analysis or to potted plants.…”

Section: Environmental Conditionsmentioning

confidence: 99%