Agriculture Reference
In-Depth Information
Table 5.2
Polyamine modification in several cultivated species under different cold treatment
Treatment
Plant species
Polyamine levels modification Reference
Cold-hardened-
Freezing
Triticum aestivum
Increased Put and Spd (Winter)
and decreased Put (Spring)
Szalai et al.
2009
Chilling
Cucumis sativus
Increased Put, Spd and Spm
Zhang et al.
2009
Chilling
Zea mays
Increased Put, decreased Spd
and Spm
Gao et al.
2009
Chilling
Zea mays
Decreased Put, increased Spd
and Spm
Zheng et al.
2009
Chilling
Solanum tuberosum
and Solanum
phureja
Slilght modification, genotype-
dependent
Oufir et al.
2008
Chilling
Cicer arietinum
Increased Put, Spd and Spm
Nayyar
2005
Chilling
Oryza sativa
Slilght modification, genotype-
dependent
Pillai and Akiyama
2004
Chilling
Zea mays
Increased Put
Németh et al.
2002
Chilling
Lycopersicum
sculentum
Increased Put.
Kim et al.
2002
Chilling
Cucumis sativus
Increased Spd
Shen et al.
2000
Chilling
Oryza sativa
Increased Put
Lee et al.
1997
Chilling
Zea mays
Increased Put
Szalai et al.
1997
Freezing
Triticum aestivum
Increased Put
Rácz et al.
1996
Chilling
Oryza sativa
Increased Put
Lee et al.
1995
Cold-hardened
Triticum aestivum
and
Medicago sativa
Increased Put
Nadeau et al. 1987
Chilling
Phaseolus sp.
Increased Put in tolerant and
no change in sensitive
cultivars
Guye et al.
1986
an intermediate in Put synthesis and a product of ADC activity) indicated that Put
accumulation was mediated by ADC. Again, no major variations were observed in
ODC activity levels, reinforcing the idea that ADC is the main enzyme responsible
for the increase in plant Put levels during cold hardening. Experiments carried out
with chilling (5 °C) temperatures for maize under two different light conditions
(darkness and light) by Szalai et al. (
1997
) found a continuous rise in the Put level,
which was more pronounced under the light condition. One day after chilling, Spd
also increased in light, whereas it decreased in darkness. After the second day, chill-
ing provoked a 50 % and 80 % fall in the Spd content in light and dark, respectively,
compared with the unstressed control. Likewise, experiments performed on winter
and spring wheat grown under low and normal light conditions (Szalai et al.
2009
)
showed that changes in PA contents were markedly light dependent.
Using seedlings of two inbreeded maize lines differing in cold sensitivity (Gao
et al.
2009
), it was found that Put concentrations escalated after chilling stress in
mesocotyl and coleoptile, but the root Put concentration remained unchanged. In-
versely, Spd and Spm concentrations decreased after chilling stress in the three men-
tioned seedling organs. On the other hand, the electrolyte leakage in cold stressed
tissues was lower in the tolerant than in the sensitive cultivar, whereas the level
