Akademik Veri Yönetim Sistemi
International Symposium on Strategies Towards Sustainability of Protected Cultivation in Mild Winter Climate, Antalya, Türkiye, 31 Ocak 2009, cilt.807, ss.681-686
The effects of photoperiod and sowing time on the growth and flowering characteristics of a Consolida orientalis population native to Cevizli district (Antalya, South Anatolia) were investigated. The seeds were sown in an unheated plastic greenhouse on 22 October, 22 November and 22 December under natural, 14- and 16-h day-length treatments. The 14- and 16-h day-lengths were established by lengthening the natural day-lengths to 14 and 16 h with use of night break photoperiodic lighting at 1.8-1.9 mu mol m(-2) s(-1) and 400-700 nm. The results indicated that days from sowing to flowering significantly reduced with delaying sowing dates under each day-length treatment and there were no significant differences from the day-length treatments in days to flowering. Differences in sowing dates did not exactly reflect the flowering dates as a result of delaying seedling emergence in early sowings and the flowering dates of plants sown on different dates were quite similar ranging from 11 April to 22 April. The largest plant heights and stem diameters were recorded for plants sown on 22 December, whereas there were no significant differences originating from photoperiod or photoperiod and sowing time interaction in plant height, stem diameter, and length, diameter and flower number of main and secondary flower stalks. These results were interpreted to mean that C. orientalis behaves as a neutral day-plant under certain growing conditions, which is an advantage for growing this species during the short-days of the year.