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Register a new userPropagation of Magnolia grandiflora L. Tree by Using Semi-hardwood Cuttings that Were Treated by Rooting Hormone (IBA)
إكثار شجرة الماغنوليا كبيرة الأزهار بالعقل نصف المتخشبة باستخدام هرمون التجذير (IBA)
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درس تأثير استخدام العقل نصف المتخشبة المأخوذة من أعمار مختلفة من أشجار الماغنوليا كبيرة الأزهار Magnolia grandiflora L. ( أشجار فتية بعمر 15 سنة, أشجار متوسطة العمر 30 سنة, و شجرة كبيرة عملاقة بعمر 110 سنة), و معاملتها بهرمون أندول حمض البيوتريك (IBA), بتركيز 2000 ppm, بثلاثة أزمنة (10,20,30 ثانية) تحت ظروف البيت المحمي.
Studying of using of semi-hardwood cuttings that were got from different ages for Magnolia gradiflora L. trees: Young trees that are 15 years old, middle-aged trees that are 30 years old, and only one old giant tree which is 110 years old were performed by treating the cuttings with Indole Butric Acid Rooting Hormone 2000 P.P.M. which was used during three periods of time: 10, 20 ,and 30 seconds under green house conditions.
References used
Griffin, J. J.,Blazich,F. A., and RanneyT. G.(1999) Propagation of Magnolia virginiana ‘Santa Rosa’ by Semi-Hardwood Cuttings. J. Environ. Hort. 17(1):47–48
Childs K. and and Beeson, J. R. C. 2001, rooting ‘little gem’ magnolia: cell-u-wett or water?. SNA Research Conference - Vol. 46 :371-373
Stadtherr, R.J. 1967. magnolia grandiflora by cuttings. Proc. Int. Plant Prop. Soc. 17:260-263
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This current study was carried out on B41 grape rootstock
micropropagated in vitro at the General Commission for Scientific Agricultural
Research (GCSAR), Syria to study the effect of different concentrations of
sodium chloride on the multiplicati
on and rooting stages. The results showed
that the highest average of survival plants (98%), the number of new buds
(8.43) and plant length (8.58 cm) were obtained in the control treatment after 4
weeks from multiplication stage. The treatment with 50 mM of sodium chloride
led to reduce the multiplication rates with significant differences, while the
lowest plant multiplication had occurred with 100 mM of sodium chloride and
no survival plants were remained by the treatment with 150 mM of sodium
chloride during multiplication stage. The highest rooting rates (% 85.30), the
number of roots (4.67) and root length (6.28 cm) were also obtained in the
control treatment after 4 weeks from rooting stage. The treatment with 50 mM
of sodium chloride led to reduce the rooting process with significant
differences. The lowest rooting results were observed with 100 mM of sodium
chloride and no rooting rate was observed when plants were treated with 150
mM of sodium chloride.
This current study was conducted on gardenia plant (Gardenia
jasminoides.L.) cv. ellis. which was micropropagated in vitro to study the effect
of some plant growth regulators on multiplication and rooting, for the aim of
developing a complete in v
itro microprpagation system of the studied cv.
Results demonstrated that, the best medium for in vitro micropropagation of
the studied cv. was MS medium supplemented with 1 mg/L BA + 0.1 mg/L IBA
with a multiplication rate of 5.33 new shoots, with average shoot height of 4.73
cm, and average leaf number of 4.36. These shoots were then transferred to a
rooting media containing a half-strength of the multiplication basal media with
NAA at a concentration of 1mg/L which resulted in highest rooting efficiency of
97% with average root number of 9.67, and average root length of 5.35 cm, and
average stem length of 9.80 cm, and average leaf number of 5.07. Increasing
NAA concentration in rooting media to 1.5 mg/L resulted in increasing root
length average to 6.28 cm with significant difference in comparison to the
previous treatment. Rooted Plantlets were acclimatized gradually in a growth
room conditions to ex vitro conditions with 85 % efficiency.
Studying of using of semi-hardwood cuttings that were got from
different ages for Magnolia gradiflora L. trees: Young trees that are
15 years old, middle-aged trees that are 30 years old, and only one old
giant tree which is 110 years old were per
formed by treating the
cuttings with Indole Butric Acid Rooting Hormone 2000 P.P.M. which
was used during three periods of time: 10, 20 ,and 30 seconds under
green house conditions.
The study showed that IAA treated cuttings were rooted earlier and bud
development was delayed. On the other hand, IAA treatment increased rooting
percentage and reduced the percentage of bud development. Increasing
NaCl salinity to ٠,١ M decrease
d the rooting ability in cuttings, while the
use of IAA could mitigate the adverse effect of salinity. The best results of
rooting were obtained in treatment of (٠,٠٥ M).
In vitro rooting was significantly increased by adding indolebutyric
acid (IBA) to medium and rooting was improved by adding ١,٠ g/L activated
charcoal or ٠,١ g/L polyvinylpyrrolidone (PVP). Indoleacetic acid (IAA) (٠,٠ to
٤,٠ mg/L) was not effect
ive for rooting except when used with ٠,١ g/L PVP. A
٩٥٪ survival was achieved when plants were acclimatized ex vitro. Such
procedures could help significantly in clonally propagating bitter almond and
conserving its germplasm.
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