Journal
POTATO RESEARCH
Volume 44, Issue 4, Pages 389-399Publisher
SPRINGER
DOI: 10.1007/BF02358598
Keywords
flow cytometry; calcium alleviation; fluorescent microscopy; NaCl
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In many plant species, it has been demonstrated at the whole plant level that supplemental Ca2+ alleviates the effects of salinity stress. These effects have been attributed to physiological processes, but there are no reports of the effects of supplemental Ca2+ on preventing nuclear damage to the root meristematic cells following exposure to NaCl salinity. Two in vitro cultured potato (Solanum tuberosum L.) cultivars, analysed by fluorescent microscopy and flow cytometry, showed a similar pattern of salinity-induced changes to the nuclei of root meristematic cells. Damage occurring after only a few hours was followed by nuclear degradation at 24 h. Flow cytometry histograms showed a reduction in G1 and G2 nuclei and an increase in degraded nuclei in NaCl-stressed roots. Salinity-induced nuclear degradation was alleviated by the addition of CaCl2.
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