Journal
PLANT GROWTH REGULATION
Volume 55, Issue 3, Pages 169-173Publisher
SPRINGER
DOI: 10.1007/s10725-008-9270-y
Keywords
cell viability; glycine betaine; K(+); Na(+); proline; relative growth rate; salt stress; sugarcane
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In vitro responses of embryogenic sugarcane (Saccharum officinarum L.; cv. CoC-671) calli stressed with different levels of NaCl (0.0, 42.8, 85.6, 128.3, 171.1, 213.9 or 256.7 mM) were studied. The results showed that a significant decrease in callus growth and cell viability occurred with >= 85.6 mM NaCl. Higher amounts of free proline and glycine betaine were accumulated in NaCl-stressed calli. Although the leached and retained Na(+) contents increased, the retained K(+) content decreased with increasing levels of NaCl. Such a mechanism implies that sugarcane can be considered as a Na(+)-excluder. The accumulation of salt ions and osmolytes could play an important role in osmotic adjustment in sugarcane cells under salt stress.
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