Seasonal changes in xanthophyll composition and photosynthesis of cork oak (Quercus suberL.) leaves under mediterranean climate
نویسندگان
چکیده
منابع مشابه
Diurnal changes in photoprotective mechanisms in leaves of cork oak (Quercus suber) during summer.
Daily variations in photoprotective mechanisms were studied in sun and shade leaves of 40-year-old cork oak (Quercus suber L.) trees during early summer in Portugal. Although trees were not severely water stressed because predawn leaf water potentials remained high, photosynthesis and stomatal conductance decreased at midday. The midday depression in gas exchange was not reversed by short-term ...
متن کاملPhylogeographical variation of chloroplast DNA in cork oak (Quercus suber).
BACKGROUND AND AIMS In the last decades, the geographical location of the centre of origin of Quercus suber (cork oak), a strictly western Mediterranean oak species, has been the subject of controversy. METHODS RFLP variation over the whole chloroplast DNA molecule and PCR-RFLPs over seven specific cpDNA fragments were analysed phylogeographically to reconstruct the evolutionary history of co...
متن کاملPhotosynthesis and the Xanthophyll Cycle-mediated Photoprotection in Leaves of Quercus Rubra and Q. Alba Seedlings of Different Light Environments
Two and three years after the outplanting of 1-O northern red oak (Quercus rubra, NRO) and white oak (Q. ulba, WO) nursery stocks, the highest net photosynthetic rates (A-) were observed from seedlings growing on a clearcut site followed by those under a pine stand. Both NRO and WO seedlings under a hardwood stand had A, less than 10% of the full sun seedling A,,. Oaks grown under hardwoods inc...
متن کاملSeasonal changes in the temperature response of photosynthesis in canopy leaves of Quercus crispula in a cool-temperate forest.
Understanding seasonal changes in photosynthetic characteristics of canopy leaves is indispensable for modeling the carbon balance in forests. We studied seasonal changes in gas exchange characteristics that are related to the temperature dependence of photosynthesis in canopy leaves of Quercus crispula Blume, one of the most abundant species in cool-temperate forests in Japan. Photosynthetic r...
متن کاملLow temperature during winter elicits differential responses among populations of the Mediterranean evergreen cork oak (Quercus suber).
Populations of cork oak (Quercus suber L.) were assessed for seasonal and inter-population variability in, and temperature responses of, the ratio between light-induced variable and maximum fluorescence of chlorophyll, Fv/Fm, considered a surrogate for the maximum photochemical efficiency of photosystem II (PSII). Seedlings from 10 populations throughout the distribution range of Q. suber in th...
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ژورنال
عنوان ژورنال: Journal of Experimental Botany
سال: 1997
ISSN: 0022-0957,1460-2431
DOI: 10.1093/jxb/48.9.1667