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Bukhov, N. G.; Makarova, V. V.; Bondar, V. V.; Drozdova, I. S.; Egorova, E. A.; Kotova, L. M.; Kotov, A. A.; Krendeleva, T. E.

doi:10.1023/a:1006281321925

Cited by 8 publications

(5 citation statements)

References 52 publications

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“…However, the engagement of alternative electron sinks, a phenomenon frequently observed at high temperatures (Havaux 1996;Bukhov et al 1999;Pons and Welschen 2003), may result in underestimation of g m when calculated with the variable J method (Evans and Loreto 2000). However, as in our study both the constant and the variable J methods produced a significant decrease of g m during the day (P \ 0.05), it appears unlikely that the possible engagement of alternative electron sinks at midday qualitatively changed our results.…”

Section: Diffusional Limitationscontrasting

confidence: 46%

Contribution of diffusional and non-diffusional limitations to midday depression of photosynthesis in Arbutus unedo L.

Grassi

Ripullone

Borghetti

et al. 2009

Trees

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It is still unknown whether the midday depression of photosynthesis under severe water stress, frequently observed in plants growing in a Mediterranean-type climate, is primarily a consequence of diffusional or non-diffusional limitations. We carried out combined measurements of gas exchanges and chlorophyll fluorescence in field-grown Arbutus unedo L. trees during late spring and mid summer, and a quantitative limitation analysis was performed to distinguish between the different limitations to photosynthesis, i.e., diffusional [D L = stomatal (S L) + mesophyll (MCL)] and non-diffusional (carboxylation capacity and electron transport, B L) limitations. Light-saturated assimilation at ambient CO2 (A max), stomatal conductance to water vapour (g sw) and maximum carboxylation rate (V cmax C i) showed a marked midday depression during both periods. The total limitations tended to increase during the day and were remarkably similar in June and July (50 and 48%, respectively); on a daily basis, D L was similar to B L (about 23%) in June; whereas, in July the former was predominant (38 and 4%, respectively). We concluded that the midday depression in photosynthesis was largely caused by diffusional limitations, with non-diffusional limitations playing a smaller role. Although stomatal closure was the main diffusional limitation, the decline in mesophyll conductance was not negligible during the hottest and driest period

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Section: Diffusional Limitationscontrasting

confidence: 46%

Contribution of diffusional and non-diffusional limitations to midday depression of photosynthesis in Arbutus unedo L.

Grassi

Ripullone

Borghetti

et al. 2009

Trees

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“…Under the same light intensity, the photosynthetic rate of barley seedlings grown under blue light was significantly higher than that under red and blue light 34 , which increased the proportion of blue light and significantly increased the protein content in plants 35 .…”

Section: Discussionmentioning

confidence: 89%

Effect of different shading materials on grain yield and quality of rice

Chen

Zeng

et al. 2019

Sci Rep

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Light is a basic environmental factor required for plant growth and development; however, these are not only affected by light quantity, but also by light quality - light and radiation of different wavelengths and different compositions. In four different rice varieties ( Oryza sativa L.), two kinds of shading materials, white cotton yarn (Shading (W)) and black nylon net (Shading (B)) were used to simulate cloudy days. Yield decreased under Shading (W) (15.3–17.7%) and Shading (B) (16.6–20.0%) compared to under sunny day (CK), and different effects on rice quality, which is mainly affected by changes in light quality, were observed. The change in light quality (Blue, Green, Red and R/FR proportions) represented under Shading (W) was significantly different from that under CK and Shading (B) conditions. Red light composition under Shading (W) was closer to that of the cloudy day condition. The proportion of blue light under Shading (W) was significantly lower than that under CK conditions; under Shading (B), it was higher than that under all conditions. The differences in light quality may affect photosynthesis in leaves and final starch synthesis, resulting in increased chalky grain rate, chalkiness, and poor rice quality. White cotton yarn as the shading material for further research used to simulate the influence of the light environment on rice growth under cloudy conditions will be better than black net.

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“…For the light variant 250 W m -2 of PAR, a characteris Relative changes in the F P /F S fluorescence ratio (Δ rel , %) with an increase in the intensity of the fluorescence excita tion light from 100 to 150 W m - tic feature of the pattern of the light dependence of the F P /F S ratio of a senescent leaf of a 18 day old plant was a small peak in the early light curve; then, F P /F S values decreased to a constant level at light intensities higher than 220 W m -2 . Probably, this change in the pattern of the light dependence curve of the F P /F S ratio of senescent leaves compared to younger leaves may indicate a change in the proportion of different fluorescence quenching components [6][7][8]. However, additional studies of the mechanism of such deviation are required.…”

Section: The Influence Of Leaf Senescence On Light Dependence Of Chlomentioning

confidence: 99%

“…However, additional studies of the mechanism of such deviation are required. It is worth mentioning that, in the region near 150 W m -2 of PAR, the saturation of the nonpho tochemical fluorescence quenching component is observed for many species of higher plants [7,8]. The nonphotochemical fluorescence quenching is an important mechanism of photoprotection of the pho tosynthetic apparatus.…”

Section: The Influence Of Leaf Senescence On Light Dependence Of Chlomentioning

confidence: 99%

“…A large number of studies on the light dependence of ChFI have been carried out with isolated chloroplasts and algae [3][4][5][6]. Despite the fact that some studies on the light dependence of ChFI were performed with leaves of various plants [6][7][8], the transition to a more complex and heterogeneous sys tem, such as the leaf of higher plants, is associated with a number of features that should be taken into account so that the conclusions made in these studies are cor rect and unambiguous. Currently, the majority of stud ies in biophysics and ecology of plants by the ChFI method is performed with mature leaves, and the age of objects is estimated by the calendar method [6][7][8][9].…”

mentioning

confidence: 99%

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