Conifer trees are able to memorize stress experienced during early development:
When pine cells, on their way to becoming somatic embryos, experience high temperatures (‘priming’), tolerance to abiotic stress, like drought, can be expressed months later, i.e. when these embryos become trees. Hereby, a complex crosstalk between plant hormones and epigenetics is assumed. Recent results show that cytokinins could be crucial in this process. You can learn more about these results in a number of recent MULTIFOREVER publications mainly provided by our partners from NEIKER, Spain (Castander-Olarieta et al. in Tree Physiology & in Trees - Structure and Function & in Frontiers in Plant Science & in Plants; Marques do Nascimento et al. in Forests; Pereira et al., in Forests & in Forests & Plants). The colleagues from FCBA, France and HUB, Germany commented the temperature-induced priming effects during early embryogenesis (Trontin et al., Tree Physiology).
Further, the effect of the initiation conditions on the further development of hybrid pine embryos was retraced (Montalbán et al., Forests).