Dehydrin and proline content in Brassica napus and B. carinata under cold stress at two irradiances
2012
Klima, M., Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic) | Vitamvas, P., Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic) | Zelenkova, S., Karlova Univ., Prague (Czech Republic). Prirodovedecka Fakulta | Vyvadilova, M., Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic) | Prasil, I.T., Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic)
The accumulation of cold-induced dehydrin and proline was related to the frost tolerance (FT) in several Brassica species or cultivars. A dehydrin of molecular mass 47 kDa was detected in the leaves of an Ethiopian mustard (B. carinata) and a pair of dehydrins of similar molecular mass in the three (two winter, one spring) oilseed rape (B. napus) cultivars, when plants were maintained at 4 deg C for one-month under two different irradiances. More dehydrin was accumulated in oilseed rape than in Ethiopian mustard under the high irradiance. A significant correlation was observed between leaf dehydrin content and FT, and no relationship between proline content and FT or between the proline and dehydrin contents. Protoplast-derived callus cells behaved differently from leaves sampled from intact plants, as they did not accumulate dehydrin and proline in response to cold stress.
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