The impact of long-term CO2 enrichment on sun and shade needles of Norway spruce (Picea abies): photosynthetic performance, needle anatomy and phenolics accumulation
Language English Country Ireland Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
22525245
DOI
10.1016/j.plantsci.2012.02.013
PII: S0168-9452(12)00047-7
Knihovny.cz E-resources
- MeSH
- Time Factors MeSH
- Ecotype MeSH
- Phenols analysis metabolism MeSH
- Photosynthesis physiology MeSH
- Lignin analysis metabolism MeSH
- Plant Leaves anatomy & histology drug effects growth & development radiation effects MeSH
- Mesophyll Cells ultrastructure MeSH
- Carbon Dioxide pharmacology MeSH
- Sunlight MeSH
- Picea anatomy & histology drug effects physiology radiation effects MeSH
- Trees MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Phenols MeSH
- Lignin MeSH
- Carbon Dioxide MeSH
Norway spruce (Picea abies L. Karst) grown under ambient (365-377 μmol(CO(2)) mol(-1); AC) and elevated (700 μmol(CO(2)) mol(-1); EC) CO(2) concentrations within glass domes with automatically adjustable windows and on an open-air control site were studied after 8 years of treatment. The effect of EC on photosynthesis, mesophyll structure and phenolics accumulation in sun and shade needles was examined. Photosynthetic assimilation and dark respiration rates were measured gasometrically; the structural parameters of mesophyll were determined using confocal microscopy and stereological methods. The contents of total soluble phenolics and lignin were assessed spectrophotometrically, and localizations of different phenolic groups were detected histochemically on needle cross-sections. EC enhanced the light-saturated CO(2) assimilation rate and reduced dark respiration in the current-year needles. No effects of CO(2) enrichment on mesophyll structural parameters were observed. Similarly, the accumulation and localization of phenolics and lignin remained unaffected by EC treatment. Needles differentiated into sun and shade ecotypes in the same manner and to the same extent irrespective of CO(2) treatment. Based on these results, it is apparent that the EC-induced enhancement of photosynthesis is not related to changes in the examined structural parameters of mesophyll and accumulation of phenolic compounds.
References provided by Crossref.org
Light and CO2 Modulate the Accumulation and Localization of Phenolic Compounds in Barley Leaves
