... increase of ground fluorescence (Fo), labelled Tc, [32] yielded closely cor-related results with nevertheless different absolute values (Tcwas on average 6.5 °C above T15). As a matter of ... activity of developing leaves of Zea mays is less affected by heat stress thanthat of developed leaves, Physiol. Plant. 105 (1999) 685–693.[21] Knight C.A., Ackerly D.D., An ecological and evolutionary ... (2000) 649–656.[38] Teskey R.O., Will R.E., Acclimation of loblolly pine (Pinus taeda)seedlings to high temperatures, Tree Physiol. 19 (1999) 519–525.[39] Valladares F., Pearcy R., Interactions...