Triticeae Genomics and Genetics 2016, Vol.7, No.02, 1
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contents of amino acids in the other three plant organs
(stems, leaves and spikes).
Figure 2 Effect of various concentrations of NaCl on amino acids as mg/ gm dry weight in roots, stems, leaves and spikes of wheat
cultivar cv. Sakha 94, cv. Gimiza11, cv. Gimiza10 and cv. Giza 168 .
In stems the highest accumulation of amino acids was
obtained in plants irrigated with 20 mM NaCl (about
65.6% over the control value), in leaves and spikes the
highest accumulation of amino acids was recorded in
plants subjected to 300 mMNaCl (45.8% over the
control value), in leaves and spikes respectively. In
roots wheat cultivar Gimiza 11 amino acids content
remained more or less unchanged up to 150 mMNaCl,
then they decreased highly significantly (figure 2). At
the level of 300 mMNaCl the amount of amino acids
reduced by 31.4% below the control value. In stems,
the accumulation of amino acids enhanced highly
significantly, whatever the concentration of NaCl
might be. The highest concentration of amino acids
was recorded at the level of 300 mMNaCl (about
54.8% over the control value).In leaves there is a
marginal increase in the total amino acids content at
the most salinization level used. In spikes, the amount
of amino acids content is maintained mainly around
the control value. The data in figure 2 showed that
while roots kept the amino acids mainly around the
control, they reduced marginally in stems of wheat
cultivar Gimiza 10. In leaves, the salinity stress up to
150 mMNaCl induced a marked accumulation in the
content of amino acids. Above which, they remained
more or less unchanged even at the highest doses of
the salt. In spikes the amount of amino acids still
around those of control plants up to 50 mMNaCl, and
then there is a gradual increase in these contents up to
150 mMNaCl. There after the concentration of
300mMNaCl retained the amount of amino acids
around those of control plants. It is worthy to mention
that the percent of increase in the total amino acids in
spike in plants subjected to 300 mMNaCl was 5%
respectively that indicated the surprising differences
between the different salinity levels in the
0
2
4
6
8
10
12
14
Root Stem Leaf Spike
Cont.
20 mM
50 mM
150 mM
300 mM
0
2
4
6
8
10
12
14
Root Stem Leaf Spike
Cont.
20 mM
50 mM
150 mM
300 mM
0
2
4
6
8
10
12
14
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Root Stem Leaf Spike
Cont.
20 mM
50 mM
150 mM
300 mM
Cv. Sakha 94
Cv. Gimiza 11
Cv. Gimiza 10
Cv. Giza 168
