Seasonal changes in water potential components of bareroot Stinking juniper (Juniperus foetidisima Wild.) Seedlings


Arslan I., Deligoz A.

KASTAMONU UNIVERSITY JOURNAL OF FORESTRY FACULTY, cilt.16, sa.1, ss.64-73, 2016 (ESCI İndekslerine Giren Dergi) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 16 Konu: 1
  • Basım Tarihi: 2016
  • Dergi Adı: KASTAMONU UNIVERSITY JOURNAL OF FORESTRY FACULTY
  • Sayfa Sayıları: ss.64-73

Özet

In this study, seasonal changes in water potential components on 1+0 year old bareroot Stinking juniper (Juniperus foetidissima Wild.) seedlings were examined. Seedlings were lifted from Egirdir Forest Nursery four weeks apart from October 2011 to April 2012. In each sampling period, water potential components were measured by the pressure - volume (P-V) curve technique and osmotic potential at full turgor (psi pi 100), osmotic potential at turgor loss point (psi pi TLP), free water content at turgor loss point (FWCTLP), relative water content at turgor loss point (RWCTLP), symplastic water at saturated point per dry weight of the shoot (V-0/DW), apoplastic water fraction (V-a/V-T) and dry weight fraction (DWF) were determined. According to the results of this study, only osmotic potential at turgor loss point showed a seasonal change. psi(pi TLP) value decreased gradually from October and after reaching the lowest values in December, it increased again and reached high values in April. The differences among lifting dates were not significant in other water potential component (psi pi 100, FWCTLP, RWCTLP, V-0/DW, V-a/V-T and DWF). Bareroot Stinking juniper seedlings lifted in December, January and February have greater stress resistance than seedlings lifted in October, November, March or April. In Egirdir forest nursery, although the safe period for lifting are late December to late February, it was concluded that if weather conditions are adverse for lifting or planting, lifting period should begin early until late November or delay until late March.