International Journal of Horticulture 2015, Vol.5, No.9, 1
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Table 4 Effect of Aluminum on the amount of anthocyanin in
sepals in the studied cultivars of
Hydrangea
at complete
flowering stage (mg/g)
Treatment
Nikko blue
Pia
Mean
control
0.05
0.05
0.05
b
Al (50 mg/l)
0.20
0.63
0.42
a
Al (100 mg/l)
0.06
0.45
0.26
c
Al (150 mg/l)
0.06
0.14
0.1
d
Mean
0.09
b
0.32
a
0.21
SD
0.07
0.24
0.20
SE
0.01
0.03
0.02
Variables
cultivars
treatment
interaction
LSD 0.05
0.006
0.009
0.01
Different letters indicate that mean difference between
treatments are significant at 0.05 level in the same column and
between cultivars are significant at 0.05 level in the same row
concentration of aluminum increased in all treatments
in the two studied cultivars (Tables 5, 6). and (Figure
5, 6). However, it was noticed that leaves are different
to flowers as far as the accumulation of aluminum.
The amount of total aluminum in leaves increased in
the two cultivars with the gradual increscent of its
concentration in the irrigation water (Table 5) and
(Figure 5). The situation in the flowers was rather
different. The amount of aluminum increased in the
treatment of 50 mg/l but the higher concentration in the
water reflected a decrease in its concentration in the
flowers in the two cultivars (Table 6) and (Figure 6).
Discussion
Although aluminum is not an essential element for
plant growth, the study showed that there were visible
differences in growth between the plants treated with
and without Al as it was reported by (Kumar et al.,
1988). But (Jian et al., 1997) reported that the only
effect of aluminum in Hydrangea plant is that the
sepals of plants grown in the solution containing Al
were blue, whereas those of plants grown at the same
solution but without Al were pink.
The study here showed that when the concentration of
Al was high (more than 50 mg/l), the chlorophyll a,
chlorophyll b, Carotenoids and anthocyanin content
were decreased. This agree with many previous
studies indicating to the toxicity of the element of
aluminum especially in higher concentration. However,
plants differ from each other in the ability of tolerance
(Foy, 1992, Jian et al., 1997, Pietraszewska, 2001).
And also agree with (Tohidi et al., 2014) who assured
Table 5 Concentration of Aluminum in the leaves of the studied
cultivars of
Hydrangea
at complete flowering stage (mg/kg)
Treatment
Nikko blue
Pia
Mean
control
440.68
390.00
415.00
d
Al (50 mg/l)
479.00
470.00
474.50
c
Al (100 mg/l)
590.00
500.00
545.00
b
Al (150 mg/l)
610.93
532.06
571.49
a
Mean
530.15
a
473.01
b
501.58
SD
72.57
53.13
69.56
SE
8.55
6.26
5.80
Variables
cultivars
treatment
interaction
LSD 0.05
0.67
0.95
1.35
Different letters indicate that mean difference between
treatments are significant at 0.05 level in the same column and
between cultivars are significant at 0.05 level in the same row
Table 6 Concentration of Aluminum in the flowers of the
studied cultivars of
Hydrangea
at complete flowering stage
(mg/kg)
Treatment
Nikko blue
Pia
Mean
control
192.00
180.00
186.00
d
Al (50 mg/l)
432.00
378.00
405.00
a
Al (100 mg/l)
400.00
370.00
385.00
b
Al (150 mg/l)
356.00
346.00
351.00
c
Mean
345.00
a
318.50
b
331.75
SD
93.06
81.44
88.14
SE
10.97
9.60
7.35
Variables
cultivars
treatment
interaction
LSD 0.05
0.67
0.95
1.34
Different letters indicate that mean difference between
treatments are significant at 0.05 level in the same column and
between cultivars are significant at 0.05 level in the same row
Figure 1 Effect of Aluminum on the content of chlorophyll a in
the studied cultivars of
Hydrangea
at complete flowering stage
(µg/ml)
