A study on the propagation of female kiwi trees (Hayward variety) by wooden
cuttings, using plant growth regulators, was conducted at Latakia Agricultural
Research Centre during the seasons 2009, 2011 and 2012. Two dates for collecting
cuttings (J
anuary and February) from kiwi trees which were selected. On each date,
the cuttings were divided into three groups according to cutting location on the
shoot (basal, middle and apical). The NAA and IBA growth regulators were applied
at several concentrations, in addition to two treatments of the mixture of both growth
regulators.
The analytical relationship that gives the neutron beam flux does
not take into account the probability of decay. In this research, we
concluded the analytical relationship of the probability non decay
of free neutron during the passage of the sam
ple to be analyzed by
NAA. And the conclusion of the analytical relationship to the
probability of non-capture of the free neutron during the its passage
of the sample to be analyzed by NAA in a simpler method than the
previous conclusion. We conducted an application study to
investigate the effect of the probability non decay of free
neutrons, that flowing through sample, On the flux of transient
neutron beam, for neutron beam with various large thickness
samples and for different energies of neutrons. The effect of
probability of neutron decay on neutron beam flux could not be
negligible for all the energies which are bigger than of
thermal.
The search carried out in Homs Agricultural Scientific
Research Center on the field of Eriobotrya Japonica during 2013
and 2014 using the naphthalene acetic acid (NAA) on two cultivars
of Eriobotrya Japonica of Cypriot origin (Karantoki and Morfou
)
growth on the native rootstocks and reduce fruit setting percentage,
the age of the trees 15 years, has been used material NAA
concentration 20 - 40 ppm.
An application comparative study between primitive equation
and derived equations is conducted, using the experimental results of coffee sample. By applying primitive and derived equations, the number of nuclei of the irradiation isotopes is found t
o be more accurate when using the latter, but the calculation is found to be more difficult. The difficulty can be avoided, using computer software.
This study was conducted during 2012-2013 in order to efficiently micropropagate
viburnum (Viburnum tinus) bushes using tissue culture techniques. The shoots were
cultured on a Murashige and Skoog medium supplemented with 30 gl-1 sucrose, 7 gl-1 ag
ar
- agar, citric acid as an anti-oxidant (300 mgl-1), and different concentrations of benzyl
amino purine and Naphthalene Acetic Acid. A media of Murashige and Skoog was used
for laboratory rooting after reducing the major mineral elements to the half, reducing the
sucrose to 20 gl-1, and addingindole-3-butyric acid (IBA) of different concentrations (0,
0.5, 1, 1.5 mgl-1). The results showed that it is necessary to have auxin and cytokinin in
culture to improve the value of open buds and the number of shoots per initial explants.
The concentrations 0.25 mgl-1 from NAA with 1 mgl-1 from BAP gave the highest value of
open buds (93.33%) and the maximum number of shoot per initial explants (1.57). To
improve the number and length of the shoots produced, the solution mineral (MS) was
replaced with another: media woody plants (WPM) which gave better elongation for the
resulting growths (3.21 cm) and a better number of shoots (2.72 Growth/explant)
compared to the media (MS) using the same compatibility hormone (0.25 mgl-1 of NAA
and 1 mgl-1 of BAP).
The results also show that the highest percentage of rooting reached (84.44%) with
(0.5 mgl-1) IBA which was better than (1.5 mgl-1) IBA and better than the treatment of the
control. Results also showed that the best medium for the length and number of roots
formed was (2.7cm, 3.82root) when the concentration was (0.5 mgl-1) surpassing the
control. The success rate of the acclimatization of the resulting laboratory plantlets under
glasshouse conditions reached (73.33%) one month and a half after the transplanting.
This investigation was conducted on Ru140 grape rootstock at the General
Commission for Scientific Agricultural Research (GCSAR), Damascus with the
aim of in vitro vegetatively micropropagation using some plant growth
regulators on multiplication
and rooting to determine the best combinations
and concentrations of plant growth regulators that result in the best
multiplication rate, and best rooting crekeria (rate and roots number and
length). Results demonstrated that, the best medium for in vitro
micropropagation of the studied rootstock was the modified MS medium
supplemented with 4.44 μM BA + 0.49 μM IBA with multiplication rate of 7.72
new shoots every 4 weeks, and shoots lengt of 5.54 cm. These shoots were
transferred for 4 weeks to among elongation medium containing the same
medium with the addition of Kinetine at a concentration of 2.22 μM instead of
BA which led to a shoot elongation rate of 7.87 cm, then these shoots were
transferred to rooting medium for rooting, It was shown that using auxin IBA
at a concentration of 4.44 μM resulted at the highest rate of rooting (87%) with
the largest number of roots (7.56) when using the auxin IBA concentration μM
4.44 compared with the rest of other transactions and with the control as well.
However, The highest length of roots (6.29 cm) was observed on medim
contained lower IBA concentration (2.22 μM). Rooted Plants were acclimatized
gradually to ex vitro conditions with 70 % efficiency.
