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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 Chl concentration and activity of photosynthesis enzymes in leaves during long-term NaCl treatment. (A) Chl, (B) ribulose-1,5-bisphosphate carboxylase and (C) PEPC. F-values are given when significance levels are reached (S: salt; ST: seed type; **P< 0.01, ***P< 0.001). Bars with different uppercase letters indicate significant differences (P< 0.05) according to Tukey's test. Values are means ± SE of four replicates. Bl, black seed; Br, brown seed.
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PLV112F9: Changes of Chl concentration and activity of photosynthesis enzymes in leaves during long-term NaCl treatment. (A) Chl, (B) ribulose-1,5-bisphosphate carboxylase and (C) PEPC. F-values are given when significance levels are reached (S: salt; ST: seed type; **P< 0.01, ***P< 0.001). Bars with different uppercase letters indicate significant differences (P< 0.05) according to Tukey's test. Values are means ± SE of four replicates. Bl, black seed; Br, brown seed.

Mentions: The Chl concentration decreased significantly with the increase in salt concentration in both types of plants (F3,24 = 52.30, P< 0.0001) (Fig 9A). The activities of RUBPC and PEPC displayed a contrary pattern in response to salt treatment (Fig. 9B and C). Activity of ribulose-1,5-bisphosphate carboxylase/oxygenase decreased significantly with the increasing salt concentration (F3,24 = 74.18, P< 0.0001) (Fig. 9B), while salinity significantly stimulated activity of PEPC (F3,24 = 13.32, P< 0.0001) (Fig. 9C). No obvious difference was observed between plants from two types of seeds in total Chl concentration (F1,24 = 2.502, P = 0.1268) and the activities of two key photosynthesis enzymes (F1,24 = 3.975, P = 0.0577 for RUBPC; F1,24 = 2.311, P = 0.1415 for PEPC), while Chl concentration (F3,24 = 5.182, P = 0.0067) was significantly affected by the interaction of seed type and salt concentration.Figure 9.


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 Chl concentration and activity of photosynthesis enzymes in leaves during long-term NaCl treatment. (A) Chl, (B) ribulose-1,5-bisphosphate carboxylase and (C) PEPC. F-values are given when significance levels are reached (S: salt; ST: seed type; **P< 0.01, ***P< 0.001). Bars with different uppercase letters indicate significant differences (P< 0.05) according to Tukey's test. Values are means ± SE of four replicates. Bl, black seed; Br, brown seed.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

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PLV112F9: Changes of Chl concentration and activity of photosynthesis enzymes in leaves during long-term NaCl treatment. (A) Chl, (B) ribulose-1,5-bisphosphate carboxylase and (C) PEPC. F-values are given when significance levels are reached (S: salt; ST: seed type; **P< 0.01, ***P< 0.001). Bars with different uppercase letters indicate significant differences (P< 0.05) according to Tukey's test. Values are means ± SE of four replicates. Bl, black seed; Br, brown seed.
Mentions: The Chl concentration decreased significantly with the increase in salt concentration in both types of plants (F3,24 = 52.30, P< 0.0001) (Fig 9A). The activities of RUBPC and PEPC displayed a contrary pattern in response to salt treatment (Fig. 9B and C). Activity of ribulose-1,5-bisphosphate carboxylase/oxygenase decreased significantly with the increasing salt concentration (F3,24 = 74.18, P< 0.0001) (Fig. 9B), while salinity significantly stimulated activity of PEPC (F3,24 = 13.32, P< 0.0001) (Fig. 9C). No obvious difference was observed between plants from two types of seeds in total Chl concentration (F1,24 = 2.502, P = 0.1268) and the activities of two key photosynthesis enzymes (F1,24 = 3.975, P = 0.0577 for RUBPC; F1,24 = 2.311, P = 0.1415 for PEPC), while Chl concentration (F3,24 = 5.182, P = 0.0067) was significantly affected by the interaction of seed type and salt concentration.Figure 9.

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.