IN-VITRO ROOTING OF ROOTSTOCK GF-677 (PRUNUS-AMYGDALUS X P-PERSICA) AS INFLUENCED BY MINERAL CONCENTRATION OF THE NUTRIENT MEDIUM AND TYPE OF CULTURE-TUBE SEALING MATERIAL
K. Dimassitheriou, IN-VITRO ROOTING OF ROOTSTOCK GF-677 (PRUNUS-AMYGDALUS X P-PERSICA) AS INFLUENCED BY MINERAL CONCENTRATION OF THE NUTRIENT MEDIUM AND TYPE OF CULTURE-TUBE SEALING MATERIAL, Journal of Horticultural Science, 70(1), 1995, pp. 105-108
Rooting of the rootstock GF-677 (Prunus amygdalus x P. persica) in vit
ro was significantly affected by the mineral concentration of the nutr
ient medium and by the type of tube sealing material (rubber and paraf
ilm). The results showed that increasing the mineral concentration of
the WPM from half (0.5x) to twice the normal (2x) resulted in a signif
icant increase of percent rooting, number, mean length and fresh weigh
t of roots. However, when the MS substrate was employed, number and me
an length of roots were greater at 1x and 0.5x mineral concentration,
respectively. In both media fresh weight of roots was increased by inc
reasing the mineral concentration and the MS medium responded better t
han WPM at the low mineral concentration. Rubber capping proved superi
or to parafilm with respect to rooting percentage, number and root fre
sh weight. Mean root length, however, declined with rubber as capping
material.