In this research, protoplast isolations were obtained from the leaves of
Potato Binella cultivar at the laboratories of Agriculture College- Damascus
University in order to determine factors affecting the yield and viability of
protoplast isolation. Results indicated that the best yield percentage of isolated
protoplast.
This research was conducted at the Agriculture Faculty, Damascus
university to determine some factors affecting rooting of some grape rootstocks
(B41, Ru140, SO4) by hardwood cutting during two subsequent seasons. The
results showed that Rooting p
ercentage ranged between 50 to 65%. with
significant differences between tested rootstocks. The highest rooting
percentage was obtained on B41 rootstock reached 65.47% followed by SO4
and then by Ru140 which gave the lowest percentage 50.44%. The treatment
with hormone IBA increased rooting proportion and all the parameters
(number and length of root, number of leaves and shoot length) were
significantly higher than parallel parameters of the control. The storage of
cuttings at 4°C for 50 days increased significantly proportion of rooting and
number of roots compared with the storage under field condition. There were
significant differences among dates of planting where the third date (mid
February) showed superiority in all parameters studied over other dates. The
cuttings from basal and middle of annual growth gave a significant superiority
in the average root length (5.26–4.32 cm, successively) compared to the
terminal cuttings while there was no significant effect to the cuttings position on
rooting proportion.
Six Syrian landraces of Rosa damascena planted at the faculty of agriculture
of Damascus University have been evaluated in this study. A big variation of
yield was noticed among the landraces. The landrace called (Mesraba) was
superior to others c
oncerning yield which was (112.2 g/plant). On the other
hand, (Erna) had got the highest content of oil (0.071%). Analysis of oil
implemented in Suleyman Demirel University in Turkey (Isparta) identified the
main components of oil such as: Geraniol (28-31%), Citronellol (26-30%),
Nerol (12-14%), Germacrene-D (6-8%), Nonadecane (4-6%) and Linalool (1-
3%). Besides, many trace compounds were detected such as: Eicosane, Eugenol,
Citral, Hexadecane and Rose oxide. The essential oil of (Almarah) had got the
highest quality.
This study aimed to investigate Four levels of IBA concentration: (0
(control), 1000, 2000, 4000 ppm) and three kinds of rooting media: sand,
peatmoss, sand+sawdust in ratio of 1:1 in a factorial complete random design.
The results indicated that
the concentration of 2000 ppm was superior at
rooting percentage 76%, root number (20 roots) and root length 13 cm over the
other levels of concentration. Besides, the media of (Sand+Sawdust) was
superior at rooting percentage 72%, rooting number (19 roots), root length 11
cm, physical and chemical charactaristics and the charactaristics of the rooted
cuttings.
Potato (Solanum tuberosum L.) is among the most
economically important crops world-wide and in Syria
as well. It is highly responsive to different tissue culture
techniques.
In vitro culture of potato cv. 'Draga' (mid-early) was
established thro
ugh meristem tip culture.
The research was conducted at Faculty of Agriculture, Damascus University/
Syria, with the help of Scientific Agricultural Research Center in Latakia during
2013 and 2014 seasons. Three rootstocks were used i.e. Sour orange, citrumelo
and troyer c
itrange, to study some factors affecting the success of micrografting
technique (concentrations and periods of sterilization, rootstock, shoot tip size, type
of nutritive medium and the grafting method). The nutritive medium was prepared,
and the shoot tips was isolated from Navel orange source, then the micrografting
was done for the three rootstocks.
تم تنفيذ هذا البحث خلال عامي 2013 و2014 لدراسة تطبيق تقنية التطعيم المخبري الدقيق ضمن الأنابيب لإنتاج نباتات برتقال أبو سرة خالية من مرض العناد
