Polyamines as modulators of salt tolerance in rice cultivars.
Polyamines as modulators of salt tolerance in rice cultivars.
复制标题
DOI：
10.1104/pp.91.2.500
复制
发表时间：
1989-10
期刊：
影响因子：
7.4
通讯作者：
R. Krishnamurthy;K. A. Bhagwat
中科院分区：
文献类型：
--
作者：
R. Krishnamurthy;K. A. Bhagwat
研究了NaCl对水稻耐盐和盐敏感株系地上部内源二胺、腐胺和多胺、亚精胺和精胺含量的影响。三个生长阶段的品种。盐胁迫不同程度地增加了所研究的9个水稻品种体内二胺和多胺的含量。耐盐的AU 1，Co43，CSC 1是有效的，在保持高浓度的亚精胺和精胺，而腐胺的含量没有显着改变，在所有的生长阶段，当植物暴露于盐。盐敏感水稻品种Co 36、CSC 2、GR 3、IR 20、TKM 4和TKM 9在盐胁迫下地上部腐胺积累过多，亚精胺和精胺含量较低。观察到耐盐性的可能机制之一是由于相对于二胺的低增加，多胺的高度增加。或者，盐敏感性可能是由于二胺的高度增加和无法维持高水平的多胺。
The effect of NaCl on the endogenous levels of diamine, putrescine and polyamines, spermidine and spermine, was studied in the shoot system of salt-tolerant and salt-sensitive lines of rice (Oryza sativa L.) cultivars during three growth stages. Salt stress increased the levels of diamine and polyamine in varying degrees among nine rice cultivars investigated. Salt tolerant AU1, Co43, and CSC1 were effective in maintaining high concentrations of spermidine and spermine, while the content of putrescine was not significantly altered in all the growth stages when plants were exposed to salinity. The salt sensitivity in rice was associated with excessive accumulation of putrescine and with low levels of spermidine and spermine in the shoot system of salt-sensitive cultivars Co36, CSC2, GR3, IR20, TKM4, and TKM9 under saline condition. One of the possible mechanisms of saline resistance was observed to be due to the highly increased polyamines against the low increase in diamines. Alternatively, the salt sensitivity could be due to high increase of diamines and an incapacity to maintain high levels of polyamines.