translate English to French: The treatments lasted 15 days, and were as follows: (i) short day (9 h of light), (ii) short day with red light favouring the activation of the phytochrome, and (iii) short day with far-red light favouring the deactivation of the phytochrome.
Les traitements d'une durée de 15 jours furent : (i) jours courts (9 h d'éclairement), (ii) jours courts avec radiations rouge sombre favorisant la désactivation du phytochrome, (iii) jours courts avec radiations rouge clair favorisant la forme active du phytochrome.