Seasonal changes in the physiological characteristics of Anatolian black pine and the effect on seedling quality

Authors : Ayşe DELİGÖZ

Pages : 23-30

View : 13 | Download : 7

Publication Date : 2011-02-01

Article Type : Research Paper

Abstract :Seasonal changes in water relations parameters, dry weight fraction insert ignore into journalissuearticles values(DWF);, and root growth potential insert ignore into journalissuearticles values(RGP); were examined for Anatolian black pine [Pinus nigra Arn. subsp. pallasiana insert ignore into journalissuearticles values(Lamb.); Holmboe] seedlings. In addition, phenological conditions were monitored. Water relations parameters were estimated using the pressure-volume technique, including osmotic potential at full turgor insert ignore into journalissuearticles values(yp100);, osmotic potential at turgor loss point insert ignore into journalissuearticles values(ypTLP);, free water content at turgor loss point insert ignore into journalissuearticles values(FWCTLP);, relative water content at turgor loss point insert ignore into journalissuearticles values(RWCTLP);, and symplastic water/dry weight insert ignore into journalissuearticles values(Vo/DW);. ypTLP, yp100, DWF, and RGP showed seasonal changes, but FWCTLP, RWCTLP, and Vo/DW did not show a clear seasonal change. The osmotic potentials insert ignore into journalissuearticles values(ypTLP and yp100); increased rapidly during rapid shoot elongation, then decreased gradually until autumn, and the minimum values were reached in midwinter. DWF and RGP were highest at the end of January and in mid-February, respectively. The results of the study were discussed based on nursery practices insert ignore into journalissuearticles values(e.g. lifting and planting time, quality of seedlings); for the species, and as a synthesis of these results, mid-November through mid-March was suggested as the lifting and planting period for bare root Anatolian black pine seedlings.
Keywords : Key words Anatolian black pine, dry weight fraction, osmotic potential, root growth potential