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Changes in free polyamine levels induced by salt stress in leaves of cultivated and wild tomato species
Author(s) -
SantaCruz Ana,
Acosta Manuel,
PérezAlfocea Francisco,
Bolarin Maria C.
Publication year - 1997
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1997.tb01006.x
Subject(s) - putrescine , spermidine , spermine , polyamine , lycopersicon , salinity , solanaceae , botany , chemistry , horticulture , biology , biochemistry , enzyme , ecology , gene
The effects of N a Cl on endogenous free levels of the poluamines putrescine, spermi dine and spermine, and the relationships between polyamines, K + levels and Na + accumulation were determined in leaves of the cultivated tomato ( Lycopersicon esculentum Mill.) and its wild, salt‐tolerant relative L. pennellii (Correll) D' Arcy at different exposure times during a 32‐day period. Both stress treatments (100 and 200 m M NaCl) decreased the levels of putrescine and spermidine, although to a different degree for the cultivated and wild tomato species. The spermine levels did not decrease with salinity in L. pennellii over the salinization period, whereas they decreased in L. esculentum , except at the first application of the 100m M NaCl treatment. In both species, the changes induced by salinity in total polyamines and K + were very similar, with the accumulation of Na + in the leaf being concomitant with a decrease in both total polyamines and K + . This suggests that the main role of the polyamines in the leaf tissues. In this sense, a direct relationship between total polyamines and K + , and inverse relationship between polyamines and Na + and between K + and Na + were found for both species. In the short term (up to 4 days) a peculiar physiological behavior was found in L. pennellii , as the total polyamine and K + levels decreased at 100 m M but not at 200 m M NaCl, while after this time the latter plants had values lower than those of the 100 m M NaCl‐treated plants at day 11.