The cultures were carried out in PVC boxes (17.0 17.0 7.5 cm)
with 2 L of growth media, placed in a Fitoclima 750E culture
chamber illuminated by a combination of incandescent and
white fluorescent lamps (Osram L-21-84; Lumilux Plus ECO-
18 W) at a photon fluency rate of 88 mmolm2 s1 (7 klux). The
culture chamber stays under 25 0.5 C during 14 h/day and
18 0.5 C, during 10 h/night and illumination was measured
with a luximeter (Delta OHM-HD-8366).