| Title: |
Proteomic analysis of young sugarcane plants with contrasting salt tolerance. |
| Authors: |
Chiconato, Denise A., de Santana Costa, Marília G., Balbuena, Tiago S., Munns, Rana, dos Santos, Durvalina M. M. |
| Source: |
Functional Plant Biology; 2021, Vol. 48 Issue 6, p588-596, 9p |
| Subject Terms: |
SUGARCANE, SOIL salinity, PROTEOMICS, HALOPHYTES, ALKALI lands, REACTIVE oxygen species, CARRIER proteins, SODIUM salts, SALT tolerance in plants |
| Abstract: |
Soil salinity affects sugarcane (Saccharum officinale L.) production in arid and semiarid climates, severely reducing productivity. This study aimed to identify differentially regulated proteins in two cultivars that differ markedly in tolerance of saline soil. Plants were grown for 30 days and then subjected to treatments of 0 and 160 mM NaCl for 15 days. The tolerant cultivar showed a 3-fold upregulation of lipid metabolising enzymes, GDSL-motif lipases, which are associated with defence to abiotic stress, and which were not upregulated in the sensitive cultivar. Lipoxygenase was 2-fold upregulated in the tolerant cultivar but not in the sensitive cultivar, as were Type III chlorophyll a/b binding proteins. Other differences were that in the sensitive cultivar, the key enzyme of C4 photosynthesis, phosphoenolpyruvate carboxylase was downregulated, along with other chloroplast enzymes. Na+ concentrations had not reached toxic concentrations in either cultivar by this time of exposure to salt, so these changes would be in response to the osmotic effect of the soil salinity, and likely be in common with plants undergoing drought stress. Sugarcane is an important crop globally for food and biofuel production, and its yield is being affected by the expansion of saline land. This study compared two cultivars of differing salt tolerance and found that proteins involved in defence, control of reactive oxygen species, and photosynthetic energy production were upregulated in the tolerant variety and downregulated in the sensitive variety. [ABSTRACT FROM AUTHOR] |
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| Database: |
Complementary Index |
