Adjustments in epidermal UV-transmittance of leaves in sun-shade transitions

Barnes PW, Kersting AR, Flint SD, Beyschlag W, Ryel RJ (2013)
Physiologia Plantarum 149(2): 200-213.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Barnes, Paul W.; Kersting, Anna R.; Flint, Stephan D.; Beyschlag, WolframUniBi; Ryel, Ronald J.
Abstract / Bemerkung
Epidermal UV transmittance (T-UV) and UV-absorbing compounds were measured in sun and shade leaves of Populus tremuloides and Vicia faba exposed to contrasting light environments under field conditions to evaluate UV acclimation potentials and regulatory roles of photosynthetically active radiation (PAR) and UV in UV-shielding. Within a natural canopy of P.tremuloides, T-UV ranged from 4 to 98% and showed a strong nonlinear relationship with mid-day horizontal fluxes of PAR [photon flux density (PFD)=6-1830 mu molm(-2)s(-1)]; similar patterns were found for V. faba leaves that developed under a comparable PFD range. A series of field transfer experiments using neutral-density shade cloth and UV blocking/transmitting films indicated that PAR influenced T-UV during leaf development to a greater degree than UV, and shade leaves of both species increased their UV-shielding when exposed to full sun; however, this required the presence of UV, with both UV-A and UV-B required for full acclimation. T-UV of sun leaves of both species was largely unresponsive to shade either with or without UV. In most, but not all cases, changes in T-UV were associated with alterations in the concentration of whole-leaf UV-absorbing compounds. These results suggest that, (1) moderate-to-high levels of PAR alone during leaf development can induce substantial UV-protection in field-grown plants, (2) mature shade leaves have the potential to adjust their UV-shielding which may reduce the detrimental effects of UV that could occur following sudden exposures to high light and (3) under field conditions, PAR and UV play different roles in regulating UV-shielding during and after leaf development.
Erscheinungsjahr
2013
Zeitschriftentitel
Physiologia Plantarum
Band
149
Ausgabe
2
Seite(n)
200-213
ISSN
0031-9317
Page URI
https://pub.uni-bielefeld.de/record/2653733

Zitieren

Barnes PW, Kersting AR, Flint SD, Beyschlag W, Ryel RJ. Adjustments in epidermal UV-transmittance of leaves in sun-shade transitions. Physiologia Plantarum. 2013;149(2):200-213.
Barnes, P. W., Kersting, A. R., Flint, S. D., Beyschlag, W., & Ryel, R. J. (2013). Adjustments in epidermal UV-transmittance of leaves in sun-shade transitions. Physiologia Plantarum, 149(2), 200-213. doi:10.1111/ppl.12025
Barnes, P. W., Kersting, A. R., Flint, S. D., Beyschlag, W., and Ryel, R. J. (2013). Adjustments in epidermal UV-transmittance of leaves in sun-shade transitions. Physiologia Plantarum 149, 200-213.
Barnes, P.W., et al., 2013. Adjustments in epidermal UV-transmittance of leaves in sun-shade transitions. Physiologia Plantarum, 149(2), p 200-213.
P.W. Barnes, et al., “Adjustments in epidermal UV-transmittance of leaves in sun-shade transitions”, Physiologia Plantarum, vol. 149, 2013, pp. 200-213.
Barnes, P.W., Kersting, A.R., Flint, S.D., Beyschlag, W., Ryel, R.J.: Adjustments in epidermal UV-transmittance of leaves in sun-shade transitions. Physiologia Plantarum. 149, 200-213 (2013).
Barnes, Paul W., Kersting, Anna R., Flint, Stephan D., Beyschlag, Wolfram, and Ryel, Ronald J. “Adjustments in epidermal UV-transmittance of leaves in sun-shade transitions”. Physiologia Plantarum 149.2 (2013): 200-213.

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