<?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%">Catoni, R</style></author><author><style face="normal" font="default" size="100%">Varone, L</style></author><author><style face="normal" font="default" size="100%">Gratani, L</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Variations in leaf respiration across different seasons for Mediterranean evergreen species</style></title><secondary-title><style face="normal" font="default" size="100%">PHOTOSYNTHETICA</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Drought</style></keyword><keyword><style  face="normal" font="default" size="100%">Leaf respiration</style></keyword><keyword><style  face="normal" font="default" size="100%">Mediterranean evergreen species</style></keyword><keyword><style  face="normal" font="default" size="100%">water stress</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2013</style></year></dates><publisher><style face="normal" font="default" size="100%">SPRINGER</style></publisher><pub-location><style face="normal" font="default" size="100%">VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS</style></pub-location><volume><style face="normal" font="default" size="100%">51</style></volume><pages><style face="normal" font="default" size="100%">295-304</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Leaf respiration (R (L)) of evergreen species co-occurring in the Mediterranean maquis developing along the Latium coast was analyzed. The results on the whole showed that the considered evergreen species had the same R (L) trend during the year, with the lowest rates \{[\}0.83 +/- 0.43 mu mol(CO2) m(-2) s(-1), mean value of the considered species] in winter, in response to low air temperatures. Higher R (L) were reached in spring \{[\}2.44 +/- 1.00 mu mol(CO2) m(-2) s(-1), mean value] during the favorable period, and in summer \{[\}3.17 +/- 0.89 mu mol(CO2) m(-2) s(-1)] during drought. The results of the regression analysis showed that 42% of R (L) variations depended on mean air temperature and 13% on total monthly rainfall. Among the considered species, C. incanus, was characterized by the highest R (L) in drought \{[\}4.93 +/- 0.27 mu mol(CO2) m(-2) s(-1)], low leaf water potential at predawn (I-pd= -1.08 +/- 0.18 MPa) and midday (I-md = -2.75 +/- 0.11 MPa) and low relative water content at predawn (RWCpd = 80.5 +/- 3.4%) and midday (RWCmd = 67.1 +/- 4.6%). Compared to C. incanus, the sclerophyllous species (Q. ilex, P. latifolia, P. lentiscus, A. unedo) and the liana (S. aspera), had lower R (L) \{[\}2.72 +/- 0.66 mu mol(CO2) m(-2) s(-1), mean value of the considered species], higher RWCpd (91.8 +/- 1.8%), RWCmd (82.4 +/- 3.2%), I-pd (-0.65 +/- 0.28 MPa) and I-md (-2.85 +/- 1.20 MPa) in drought. The narrow-leaved species (E. multiflora, R. officinalis, and E. arborea) were in the middle. The coefficients, proportional to the respiration increase for each 10A degrees C rise (Q(10)), ranging from 1.49 (E. arborea) to 1.98 (A. unedo) were indicative of the different sensitivities of the considered species to air temperature variation.</style></abstract></record><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%">Gratani, L</style></author><author><style face="normal" font="default" size="100%">Varone, L</style></author><author><style face="normal" font="default" size="100%">Catoni, R</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Relationship between net photosynthesis and leaf respiration in Mediterranean evergreen species</style></title><secondary-title><style face="normal" font="default" size="100%">Photosynthetica</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">arbutus</style></keyword><keyword><style  face="normal" font="default" size="100%">cistus</style></keyword><keyword><style  face="normal" font="default" size="100%">Myrtus</style></keyword><keyword><style  face="normal" font="default" size="100%">Phillyrea</style></keyword><keyword><style  face="normal" font="default" size="100%">Q10</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus</style></keyword><keyword><style  face="normal" font="default" size="100%">seasonal course</style></keyword><keyword><style  face="normal" font="default" size="100%">temperature.</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><volume><style face="normal" font="default" size="100%">46</style></volume><pages><style face="normal" font="default" size="100%">567-573</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The relationship between net photosynthetic (PN) and leaf respiration (R) rates of Quercus ilex, Phillyrea latifolia, Myrtus communis, Arbutus unedo, and Cistus incanus was monitored in the period February 2006 to February 2007. The species investigated had low R and PN during winter, increasing from March to May, when mean air temperature reached 19.2 °C. During the favourable period, C. incanus and A. unedo had a higher mean PN (16.4±2.4 µmol m −2 s −1 ) than P. latifolia, Q. ilex, and M. communis (10.0±1.3 µmol m −2 s −1 ). The highest R (1.89±0.30 µmol m −2 s −1 , mean of the species), associated to a significant PN decrease (62 % of the maximum, mean value of the species), was measured in July (mean R/PN ratio 0.447±0.091). Q10, indicating the respiration sensitivity to short-term temperature increase, was in the range 1.49 to 2.21. Global change might modify R/PN determining differences in dry matter accumulation among the species, and Q. ilex and P. latifolia might be the most favoured species by their ability to maintain sufficiently higher PN and lower R during stress periods.</style></abstract></record></records></xml>