The Influence Of Priming Two Cucumber Cultivar Seeds

J. Duhok Univ. Vol.13, No.1, (Agri. And Vet. Sciences) Pp 94-102, 2010
22.32bc
18.62c
24.34bc
22.3bc
28.62ac
19.1bc
17.8c
28.76ac
2.1ab
2.7a
1.8ab
1.49b
1.8ab
1.49b
1.8ab
1.8ab
1.8ab
2.39a
1.49ab
0.9b
1.49ab
1.2a
0.9b
1.49ab
6.89ab
5.99ab
6.6ab
6.89ab
5.99ab
6.89ab
6.6ab
6.89ab
Aquadulce was the most potent cultivar, as it
gave the highest number of flowering nodes at
main stem 12.66, as compared to other cultivars.
Besides, it substantially exceeded Taka357 and
Twowaytha in flower number per inflorescence
by 36.9 and 14.4%, respectively. Taka357 gave
the lowest flowering nodes (3.77) at main stem,
and flower number per inflorescence (2.36).
However, it gave the highest setting percentage
(22.12%), where it significantly exceeded other
cultivars (table, 4). Aquadulce revealed
superiority over Taka357 in first fruiting node,
number of fruiting nodes and seed number per
pod by 29.1, 30.2 and 25.9%, respectively,
(tables, 4 and 5). Negligible differences were
observed between Aquadulce and Syrian
cultivars in first fruiting node, fruiting node
number, pod length, seed number per pod,
number of aborted seeds per pod and number of
aborted ovules per pod. Syrian significantly
exceeded Taka357 in first fruiting node and seed
number per pod by 37.1 and 29.7%, respectively.
It also exceeded Twowaytha and Babylon in pod
length 20.8 and 19.9%, respectively, and seed
number per pod 26.9 and 36.7%, respectively,
(tables, 4 and 5). The obtained results unveiled
the potent ability of Aquadulce and Local Syrian
in producing profuse flowers which in turn
resulted in reasonable pollination, setting and
pod development under drought. This conclusion
may explained the high setting percentage of
Taka357 that accompanied by substantial
reduction in pod number. Under rainfalls,
6.3ab
7.2a
6.6ab
5.99b
6.3ab
5.99b
5.7b
5.99b
6.3cd
7.5ac
7.2ad
7.2ad
5.99d
6.3cd
6.6bd
7.2ad
* Figures of unshared characters are significant (Duncan, 0.05)
6.6a
7.2a
6.3a
5.7a
5.99a
5.99a
5.7a
6.3a
2x10 -6 M ABA
2x10 -3 M ABA
0.0 ABA
2x10 -6 M ABA
2x10 -3 M ABA
0.0 ABA
2x10 -6 M ABA
2x10 -3 M ABA
Taka 357
Twowaytha
Babylon
Aquadulce fababean cultivar gave 36 flowers,
2.8 pods, and 7.7 fruiting nodes on main stem. In
this study these cultivars were categorized in
accordance to their drought resistance
capabilities as below Local Syrian >Aquadulce>
Twowaytha> Babylon> Taka35.
Aquadulce plants sprayed by 2x10 -3 M
ABA and check revealed the highest number of
flowering nodes (15) and flower number per
inflorescence (4.08), respectively. While the
highest setting percentage 25.02% was
concomitant with Taka357 check, (table, 4).
Aquadulce plants sprayed by 2x10 -3 M ABA
showed the highest number of fruiting node
(2.66), pod number per main stem (3) and seed
number per pod (4.56), (tables, 4 and 5).
Previous studies on Aquadulce fababean cultivar
manifested that pod number per plant and seed
number per pods highly contributed to yield
(Abdel, 1997). Improvements of plant
performance by ABA application might be due
to the mode of action of ABA in conserving
acceptable hydration status with in internal plant
tissues throughout stomata aperture
modifications. As a result of a daily application
of 20 µM ABA to leaves for 3 weeks during
growth at high Relative Humidity (RH), the
stomata of ABA-treated leaves grown at high RH
showed the same behaviour as did the stomata of
leaves grown at moderate RH For example; they
closed rapidly when exposed to desiccation
(Ewert et al., 2000).
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