caa a22 4500 469096403 CHVBK 20180323133032.0 cr unu---uuuuu 170328e19921101xx s 000 0 eng 10.1007/BF00317368 doi (NATIONALLICENCE)springer-10.1007/BF00317368 Dynamic stomatal behavior and its role in carbon gain during lightflecks of a gap phase and an understory Piper species acclimated to high and low light [Elektronische Daten] [Clara Tinoco-Ojanguren, Robert Pearcy] Summary: Steady-state and dynamic stomatal and assimilation responses to light transients were characterized in sun- and shade-acclimated plants of Piper auritum, a pioneer tree, and Piper aequale a shade-tolerant shrub from a tropical forest at Los Tuxtlas, Veracruz, México. Despite essentially identical steady-state responses of stomatal conductance to PFD of P. aequale and P. auritum shade plants, the dynamic responses to lightflecks were markedly different and depended on the growth regime. For both species from both growth environments, the increase in stomatal conductance occurring in response to a lightfleck continued long after the lightfleck itself so that the maximum stomatal conductance was not reached until 20-40 min after the lightfleck. Closing then occurred until stomatal conductance returned to near its original value before the lightfleck. Plants that were grown under light regimes similar to those of their natural habitat (high light for P. auritum and shade for P. aequale) had large maximum excursions of stomatal conductance and slower closing than opening responses. Plants grown under the opposite conditions had smaller excursions of stomatal conductance, especially in P. auritum, and more symmetrical opening and closing. The large and hysteretic response of stomatal conductance of P. aequale shade plants to a lightfleck was shown to improve carbon gain during subsequent lightflecks by 30-200%, depending on lightfleck duration. In contrast the very small stomatal response to lightflecks in P. auritum shade plants, resulted in no significant improvement in use of subsequent lightflecks. Springer-Verlag, 1992 Carbon gain nationallicence Dynamic response nationallicence Lightflecks nationallicence Light acclimation nationallicence Stomatal conductance nationallicence Tinoco-Ojanguren Clara Department of Botany, University of California, 95616, Davis, CA, USA aut Pearcy Robert Department of Botany, University of California, 95616, Davis, CA, USA aut Oecologia Springer-Verlag 92/2(1992-11-01), 222-228 0029-8549 92:2<222 1992 92 442 https://doi.org/10.1007/BF00317368 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00317368 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tinoco-Ojanguren Clara Department of Botany, University of California, 95616, Davis, CA, USA aut NATIONALLICENCE 700 1- Pearcy Robert Department of Botany, University of California, 95616, Davis, CA, USA aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 92/2(1992-11-01), 222-228 0029-8549 92:2<222 1992 92 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer