Abstract
The different physiological responses to heat stress in calli from two ecotypes of common reed (Phragmites communis Trin.) plants (dune reed (DR) and swamp reed (SR)) were studied. The relative water content, the relative growth rate, cell viability, membrane permeability (MP), H2O2 content, MDA content, proline level, and the activities of enzymes, such as superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), ascorbate peroxidase (APX), glutathione reductase (GR), and lipoxygenase (LOX) were assayed. Results showed that under heat stress, DR callus could maintain the higher relative growth rate and cell viability than SR callus, while H2O2 content, MDA content, and MP in SR callus increased more than in DR callus. The activities of antioxidant enzymes, such as SOD, CAT, POD, APX, and GR in two calli were enhanced by high temperature. However, antioxidant enzymes in DR callus showed the higher thermal stability than those in SR callus. LOX activity increased more in SR callus than in DR callus under heat stress. High temperature markedly elevated proline content in DR callus whereas had no effect on that in SR callus. Taken together, DR callus is more thermotolerant than SR callus, which might be due to the higher activity of antioxidant enzymes and proline level compared with SR callus under heat stress.
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Abbreviations
- APX:
-
ascorbate peroxidase
- CAT:
-
catalase
- DR:
-
dune reed
- GR:
-
glutathione reductase
- LOX:
-
lipoxygenase
- MP:
-
membrane permeability
- NBT:
-
nitro blue tetrazolium
- POD:
-
peroxidase
- PVP:
-
polyvinylpyrrolidone
- RGR:
-
relative growth rate
- RWC:
-
relative water contents
- SR:
-
swamp reed
- SOD:
-
superoxide dismutase
- TTC:
-
2,3,5-triphenyl tetrazolium chloride
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Song, L., Jiang, Y., Zhao, H. et al. Comparative study on calli from two reed ecotypes under heat stress. Russ J Plant Physiol 59, 381–388 (2012). https://doi.org/10.1134/S1021443712030168
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DOI: https://doi.org/10.1134/S1021443712030168