This study aimed to obtain seedlings balanced and superior in growth, by searching
the effect of seed size on the growth and development of seedlings of carob tree
( Ceratonia siliqua L.) developing in containers Minirhizotron in the growth room in
Research Center in Bouka-Lattakia. Seeds were divided into three categories (large-size
LS, control CS, small-sized SS) and studied several quantities indicators of growth and
development of the total shoot and root of the seedlings for a period of three months.
For a radical system, results indicated a high significant superiority in the large
seeds values for the main root of the overall growth rate such as length (cm) and the speed
of growth (cm/3days) and secondary roots (total number, total length/cm) height to control
and small seeds. And the significant superiority of the seeds of the control on the small
seeds.
It has also given large seeds higher values regarding all indicators related to the shoot
system such as average diameter and average height and average number of phalanges
stem and leaves, and ending with the dry weight of shoots.
Results for the study of periodic growth curves for the main root and main stem of
the three treatments indicated the presence of a great similarity in the overall appearance of
these curves, which refers that the appearance is not affected by this change in the amount
of seed size. On the other hand, the phenomenon was observed in contrast growth
Antagonism clearly between the totals shoot and root with any end to the growth of main
root accompanied by a junior at the end of the main stem growth and vice versa.
The research was carried out during 2015 and 2016 seasons at Arab El-Mulk village,
Banias district, in Tartous Governorate, to study the effect of planting peanut seeds
size (mixture, small, medium and large), and spraying plants with bread yeast
(Saccaromyces serevisiae) concentration of (4%) in three treatments (control, once
and twice), on biological yield (BY), Economic yield (EY) and some physiological
indicators; yield index (YI), Harvest index (HI), crop index (CI) and seed index
(SI). The experiment design was set as split plot in a randomized complete block
with four replications. The seeds size considered the main factor, while spraying
yeast allocated the sub plots. The results showed that seed size caused significant
increases in all of the studied indicators. The large seeds gave better values of (BY)
210 g, (HI) 30.56%, (CI) 44.12%, (SI) 74.85 g, except (EY) compared with mix,
small and med seeds. Also the results showed that there were no significant increase
between mixture and medium seed size in (YE) and (HI), but there was a significant
increase in (BY) and (SI), on the other hand the treatments; spray yeast for once and
twice had significant increases compared to the control, and the twice yeast spraying
gave better values (215.22 g ,63.98 g, 29.64%, 42.37 % and 73.45g ) of (BY , EY
,HI, CI and SI) respectively, compared to the control. The interaction between seeds
size and bread yeast spraying caused a significant increase which achieved 15.78 %
in (BY), 23.99 % in (EY), 9.74 in (HI), 13.68% in (CY) and 7.87g in (SI) compared
to the interaction between untreated treatment and small seeds size.
