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Effects of salinity on the growth, physiology and relevant gene expression of an annual halophyte grown from heteromorphic seeds.

Cao J, Lv XY, Chen L, Xing JJ, Lan HY - AoB Plants (2015)

Bottom Line: Results showed that osmolytes (proline and glycinebetaine) were significantly increased and that excess reactive oxygen species ([Formula: see text] H2O2) produced under high salinity were scavenged by increased levels of antioxidant enzymes (superoxide dismutase, ascorbate peroxidase and glutathione reductase) and corresponding antioxidants (ascorbic acid and glutathione).Moreover, enhancement of phosphoenolpyruvate carboxylase activity at high salt intensity had a positive effect on photosynthesis.In conclusion, we found that high salinity induced the same active physiological responses in plants from heteromorphic seeds of S. aralocaspica, there was no carry-over of seed heteromorphism to plants: all the descendants required salinity for optimal growth and adaptation to their natural habitat.

View Article: PubMed Central - PubMed

Affiliation: Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China.

No MeSH data available.


Changes of non-enzymatic antioxidant concentration in leaves during long-term NaCl treatment. (A) Ascorbic acid and (B) GSH. F-values are given when significance levels are reached (S, salt; ***P< 0.001). Bars with different uppercase letters indicate significant differences (P< 0.05) according to Tukey's test. Values are means ± SE of three replicates. Bl, black seed; Br, brown seed.
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PLV112F7: Changes of non-enzymatic antioxidant concentration in leaves during long-term NaCl treatment. (A) Ascorbic acid and (B) GSH. F-values are given when significance levels are reached (S, salt; ***P< 0.001). Bars with different uppercase letters indicate significant differences (P< 0.05) according to Tukey's test. Values are means ± SE of three replicates. Bl, black seed; Br, brown seed.

Mentions: With the increasing NaCl concentration, the AsA (F3,16 = 175.6, P< 0.0001) and GSH (F3,16 = 41.40, P< 0.0001) increased significantly in both plant types and reached to their highest values at 300 and/or 500 mM NaCl concentrations (Fig. 7A and B), although a significant decrease in AsA concentration was observed at 500 mM compared with 300 mM NaCl treatment (t10 = 10.89, P< 0.0001), it was still significantly higher than that of plants grown in the absence of salt (Fig. 7A). There was no significant difference in antioxidant concentration between plants from brown and black seeds (F1,16 = 0.8069, P = 0.3824 for AsA; F1,16 = 0.5116, P = 0.4848 for GSH).Figure 7.


Effects of salinity on the growth, physiology and relevant gene expression of an annual halophyte grown from heteromorphic seeds.

Cao J, Lv XY, Chen L, Xing JJ, Lan HY - AoB Plants (2015)

Changes of non-enzymatic antioxidant concentration in leaves during long-term NaCl treatment. (A) Ascorbic acid and (B) GSH. F-values are given when significance levels are reached (S, salt; ***P< 0.001). Bars with different uppercase letters indicate significant differences (P< 0.05) according to Tukey's test. Values are means ± SE of three replicates. Bl, black seed; Br, brown seed.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4612296&req=5

PLV112F7: Changes of non-enzymatic antioxidant concentration in leaves during long-term NaCl treatment. (A) Ascorbic acid and (B) GSH. F-values are given when significance levels are reached (S, salt; ***P< 0.001). Bars with different uppercase letters indicate significant differences (P< 0.05) according to Tukey's test. Values are means ± SE of three replicates. Bl, black seed; Br, brown seed.
Mentions: With the increasing NaCl concentration, the AsA (F3,16 = 175.6, P< 0.0001) and GSH (F3,16 = 41.40, P< 0.0001) increased significantly in both plant types and reached to their highest values at 300 and/or 500 mM NaCl concentrations (Fig. 7A and B), although a significant decrease in AsA concentration was observed at 500 mM compared with 300 mM NaCl treatment (t10 = 10.89, P< 0.0001), it was still significantly higher than that of plants grown in the absence of salt (Fig. 7A). There was no significant difference in antioxidant concentration between plants from brown and black seeds (F1,16 = 0.8069, P = 0.3824 for AsA; F1,16 = 0.5116, P = 0.4848 for GSH).Figure 7.

Bottom Line: Results showed that osmolytes (proline and glycinebetaine) were significantly increased and that excess reactive oxygen species ([Formula: see text] H2O2) produced under high salinity were scavenged by increased levels of antioxidant enzymes (superoxide dismutase, ascorbate peroxidase and glutathione reductase) and corresponding antioxidants (ascorbic acid and glutathione).Moreover, enhancement of phosphoenolpyruvate carboxylase activity at high salt intensity had a positive effect on photosynthesis.In conclusion, we found that high salinity induced the same active physiological responses in plants from heteromorphic seeds of S. aralocaspica, there was no carry-over of seed heteromorphism to plants: all the descendants required salinity for optimal growth and adaptation to their natural habitat.

View Article: PubMed Central - PubMed

Affiliation: Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China.

No MeSH data available.