Abstract
The hypothesis that lenticels may act as a gate for light penetration through the highly light absorptive periderm, was investigated. Yet, transmittance of isolated periderms from ten tree species was considerably higher in the non-lenticel than in the lenticel regions. Depending on species, the lower transmittance of lenticels was due to either higher reflectance and/or higher absorptance. Corticular tissue regions below lenticels were more shade acclimated. Chlorophyll fluorescence images showed lower PS II effective yields, a lower potential for non-photochemical quenching and a possibly higher risk of photoinhibition in the corticular areas under the lenticels in most of the cases.
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Manetas, Y., Pfanz, H. Spatial heterogeneity of light penetration through periderm and lenticels and concomitant patchy acclimation of corticular photosynthesis. Trees 19, 409–414 (2005). https://doi.org/10.1007/s00468-004-0399-7
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DOI: https://doi.org/10.1007/s00468-004-0399-7