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Publication Type J
Authors Mesleard, F., N. Yavercovski and T. Dutoit
Title Photoperiod buffers responses to salt and temperature during germination of two coastal salt marsh colonizers Juncus acutus and Juncus maritimus
Source Plant Biosystems
Author Keywords Halophyte photoperiod recruitment salinity temperature seed-germination phragmites-australis salinity light tolerance plants
Abstract Juncus acutus and J. maritimus are two colonizers of coastal marsh rangeland with worldwide distribution. We tested the effect of salt, temperature, and photoperiod on the germination capacity of seeds of the two Juncus from the Rhone delta (south of France). We measured the first day of germination, the mean time, speed, and rate of germination on seeds subjected to five salinity levels, three Dark-Light temperatures and two D-L photoperiods (12-12 and 10-14). The 10-14 D-L photoperiod, although it corresponds to one of the two main germination periods of J. acutus and J. maritimus in the northern Mediterranean, has never been previously used to study their germination capacity. Analyses showed significant effects of salinity and temperature on the germination parameters tested, and for these two factors we found results comparable to those of previous studies. Salinity slowed down and reduced the germination process while spring temperatures had a positive effect. A surprising result was obtained by changing the D-L photoperiod from 12-12 to 10-14 which then largely buffered the negative effect of salt and high temperatures on germination. This capacity of J. acutus and J. maritimus to withstand salty conditions during the germination phase due to the spring photoperiod could be decisive in the ability of both species to colonize saline environments.
Author Address [Mesleard, F.; Yavercovski, N.] Ctr Rech Tour Valat, Arles, France. [Mesleard, F.; Dutoit, T.] Univ Avignon & Pays Vaucluse, Inst Mediterraneen Biodiversite & Ecol Marine & C, IRD Site Agroparc 337, UMR CNRS 7263, BP 1207, F-84911 Avignon 9, France. Mesleard, F (reprint author), Ctr Rech Tour Valat, Arles, France. mesleard@tourduvalat.org
ISSN 1126-3504
ISBN 1126-3504
29-Character Source Abbreviation Plant Biosyst.
Year Published 2016
Volume 150
Issue 6
Beginning Page 1156-1164
Digital Object Identifier (DOI) 10.1080/11263504.2015.1007898
Unique Article Identifier WOS:000388002200003
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