SALINITY RESULTS IN POLYAMINE ACCUMULATION IN EARLY RICE (ORYZA-SATIVA-L) SEEDLINGS
SALINITY RESULTS IN POLYAMINE ACCUMULATION IN EARLY RICE (ORYZA-SATIVA-L) SEEDLINGS
复制标题
DOI：
10.1071/pp9880777
复制
发表时间：
1988-01-01
期刊：
影响因子：
--
通讯作者：
GHOSH, B
中科院分区：
文献类型：
--
作者：
BASU, R;MAITRA, N;GHOSH, B
盐胁迫对水稻萌发幼苗的影响。Rupsail引起多胺含量的增加，并伴随着精氨酸脱羧酶（ADC）活性的增强;在腐胺的情况下，增加是100%。胚芽鞘和根的反应性不同; ADC活性在根和胚芽鞘中分别在50 mM和100 mM时最大。二氟甲基精氨酸是ADC的有效抑制剂，可降低多胺积累和ADC活性。NaCl可使ADC活性提高1.6倍。在400 mM NaCl下，胚芽鞘和根中[14 C]亮氨酸掺入蛋白质分别减少4倍和10倍。随着盐浓度的增加，糖、氨基酸、多胺和总电解质的流出量逐渐增加。芽鞘和根中Na ~+和Cl ~-的流入以及K ~+的流出与所施用的NaCl浓度成正比。
Saline (NaCl) stress in germinated seedlings of rice cv. Rupsail causes an increase in polyamine content and concomitantly an enhancement of arginine decarboxylase (ADC) activity; in the case of putrescine, the increase is 100%. The responsiveness of coleoptiles and roots is different; ADC activity is maximum in roots and coleoptiles at 50 mM and 100 mM respectively. Difluoromethyl arginine, a potent inhibitor of ADC, reduces both polyamine accumulation and ADC activity. NaCl can enhance the activity of ADC by 1.6-fold in vitro. [14C]leucine incorporation int protein at 400 mM NaCl is decreased 4- and 10-fold in coleoptiles and roots, respectively. Efflux of sugar, amino acid, polyamines and total electrolytes increased gradually with the increase in concentration of salt. Influx of Na" and Cl- and efflux of K+ in coleoptiles and roots are directly proportional to the concentration of NaCl applied.