<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Esteso-Martínez, Jordán</style></author><author><style face="normal" font="default" size="100%">Peguero-Pina, José Javier</style></author><author><style face="normal" font="default" size="100%">Valladares, Fernando</style></author><author><style face="normal" font="default" size="100%">Morales, Fermín</style></author><author><style face="normal" font="default" size="100%">Gil-Pelegrín, Eustaquio</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Self-shading in cork oak seedlings: Functional implications in heterogeneous light environments</style></title><secondary-title><style face="normal" font="default" size="100%">Acta Oecologica</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Canopy structure</style></keyword><keyword><style  face="normal" font="default" size="100%">Light stress</style></keyword><keyword><style  face="normal" font="default" size="100%">Mediterranean</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus suber</style></keyword><keyword><style  face="normal" font="default" size="100%">Self-shading</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2010</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2010///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://linkinghub.elsevier.com/retrieve/pii/S1146609X10000561</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">36</style></volume><pages><style face="normal" font="default" size="100%">423 - 430</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The high self-shading found in Quercus suber seedlings has been interpreted as a feature common for plants growing in high light environments. But many studies reveal that Q. suber has high survival rates under low-light conditions, so a high degree of self-shading could be the consequence of a foliage composed of many small leaves, with no drawbacks for coping with low light. A characterization of the light environment in a Q. suber stand together with a study of photosynthetic parameters of full sunlightexposed (FSLE) and self-shaded (SS) leaves were carried out to tackle this apparent contradiction. Although the number of sunﬂecks longer than 120 min during the 3 months of measurements was low, the occurrence of at least one sunﬂeck longer than 120 min per day in the understory of the forest studied was very common. Sunﬂecks shorter than 30 min promoted an increase in net photosynthesis (A) in FSLE leaves, but not in SS leaves. However, sunﬂecks longer than 60 min led to a very strong decrease in A and in actual photosystem II efﬁciency (FPSII ) in FSLE leaves, when compared to sunﬂecks shorter than 30 min. In SS leaves, changes were, again, negligible. The multi-layered foliage of Q. suber seedlings allowed i) FSLE leaves to obtain the maximum photosynthetic yield for short sunﬂecks, and ii) SS leaves to increase their contribution to the photosynthesis of the whole plant for long sunﬂecks, thus, optimizing the use of light by FSLE and SS leaves during short and long sunﬂecks respectively. Therefore, shoot architecture of Q. suber seedlings involving high levels of self-shading allows to adequately cope with the low but highly heterogeneous light conditions of the understory, particularly when sunﬂecks of contrasting durations take place as it is frequently the case for evergreen Mediterranean forests</style></abstract><issue><style face="normal" font="default" size="100%">4</style></issue><notes><style face="normal" font="default" size="100%">The following values have no corresponding Zotero field:&lt;br/&gt;publisher: Elsevier Masson SAS</style></notes></record></records></xml>