Abstract
The present study was conducted to quantify the response of chlorophyll, protein concentration and electrophoretic patterns of leaf and root soluble proteins to increasing salinity in the rooting medium of three varieties (Payam, Kimia and Jambo) of sorghum (Sorghum bicolor L.) and to evaluate the usefulness of these parameters in identifying salt-resistant varieties. This work was carried out with five concentrations of salinity (0, 50, 100, 150 and 200 mM NaCl) and two sampling time points (sampling after 15 and 30 days salt treatment) using a split-split plot design with randomized complete block layout. With increasing salinity, the K+ concentration was found to decrease and the amount of Na+ and Na+/K+ increase significantly (P≤0.05) in roots and shoots. Chlorophyll a, b, total chlorophyll concentration and leaf and root soluble protein contents decreased with increasing salinity. The electrophoretic pattern of soluble proteins of cv. Jambo showed that after 15 days NaCl (200 mM) and 30 days NaCl (100 and 150 mM) treatment, a new polypeptide of molecular weight 50 kDa was expressed. The expression of this polypeptide might have been due to the plant adapting to NaCl via expression of a stress-resistant gene. This polypeptide was synthesized under salt stress and is suggested as a marker protein for salt adaptation. Keywords: Chlorophyll, electrophoretic patterns, soluble proteins, salinity, sorghum.
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Claims 7
Claim · model-written summary
Increasing salinity significantly decreased K+ concentration in roots and shoots.
- Organ / stage
- roots and shootse0
- Treatment
- increasing salinitye0
- Outcome
- K+ concentratione0
- Direction
- decreasee0
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum (Sorghum bicolor L.)”
e0“With increasing salinity, the K+ concentration was found to decrease and the amount of Na+ and Na+/K+ increase significantly (P≤0.05) in roots and shoots.”
Claim · model-written summary
Increasing salinity significantly increased Na+ in roots and shoots.
- Organ / stage
- roots and shootse0
- Treatment
- increasing salinitye0
- Outcome
- amount of Na+e0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum (Sorghum bicolor L.)”
e0“With increasing salinity, the K+ concentration was found to decrease and the amount of Na+ and Na+/K+ increase significantly (P≤0.05) in roots and shoots.”
Claim · model-written summary
Increasing salinity significantly increased Na+/K+ in roots and shoots.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum (Sorghum bicolor L.)”
e0“With increasing salinity, the K+ concentration was found to decrease and the amount of Na+ and Na+/K+ increase significantly (P≤0.05) in roots and shoots.”
Claim · model-written summary
Increasing salinity decreased chlorophyll a, b and total chlorophyll concentrations.
- Treatment
- increasing salinitye0
- Outcome
- Chlorophyll a, b, total chlorophyll concentratione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum (Sorghum bicolor L.)”
e0“Chlorophyll a, b, total chlorophyll concentration and leaf and root soluble protein contents decreased with increasing salinity.”
Claim · model-written summary
Increasing salinity decreased leaf and root soluble protein contents.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum (Sorghum bicolor L.)”
e0“Chlorophyll a, b, total chlorophyll concentration and leaf and root soluble protein contents decreased with increasing salinity.”
Claim · model-written summary
Jambo expressed a new 50 kDa polypeptide after the specified NaCl treatments.
- Material
- cv. Jamboe0
- Treatment
- NaCl (200 mM)e0
- Outcome
- a new polypeptidee0
- Value
- 50 kDae0
- Qualifier
- after 15 days NaCl (200 mM) and 30 days NaCl (100 and 150 mM) treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum (Sorghum bicolor L.)”
e0“The electrophoretic pattern of soluble proteins of cv. Jambo showed that after 15 days NaCl (200 mM) and 30 days NaCl (100 and 150 mM) treatment, a new polypeptide of molecular weight 50 kDa was expressed.”
Claim · model-written summary
The authors suggested the polypeptide as a marker for salt adaptation.
- Outcome
- marker protein for salt adaptatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sorghum (Sorghum bicolor L.)”
e0“This polypeptide was synthesized under salt stress and is suggested as a marker protein for salt adaptation.”
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