Effect of Glucose on Zinc-induced Growth of Root System in Rice

葡萄糖在锌诱导水稻根系生长中的作用(英文)

[Objective] This study was aimed at exploring the effect of glucose signal on the zinc-induced growth of root system using rice as the material.[Method] The variation of root system growth,active oxygen production and proton secretion of root systems treated with various concentrations of glucose,glucose ＋ Zn（NO3）2,mannitol and Zn（NO3）2 ＋ mannitol were analyzed in rice（Oryza sativa L.cv Zhonghua no.11）.[Result] The results showed that the concentrations of glucose had affected the shoot height,primary root length,amount and length of lateral roots on primary roots,adventitious root length and length of lateral roots on adventitious roots in varying degrees,but not the amount of adventitious roots and lateral roots on adventitious roots under Zn＋ and Zn-condition.Glucose of high concentrations induced the production of active oxygen,while lacking of glucose would lead to the decrease of proton secretion of root systems.However,there were significant differences in these indexes between under Zn＋ and under Zn-condition treated with the same concentrations of glucose.The effects of glucose and mannitol with the same concentration on the growth of root systems were significantly different,indicating that the variation was resulting from sugar signal but not the osmotic potential.[Conclusion] The glucose had played important roles in the growth of rice root system both under normal condition and under Zn＋ condition.

[目的]本实验旨在以水稻为材料研究葡萄糖信号在锌诱导根系生长中的作用。[方法]本实验以水稻中花11号为材料,分析了在不同浓度的葡萄糖、葡萄糖+锌、甘露醇和锌+甘露醇处理条件下,水稻的根系生长、活性氧的产生和根系质子分泌的变化。[结果]结果表明,在有锌和无锌的处理条件下,除了不定根数和不定根侧根数外,株高、初生根长、初生根侧根数/长、不定根长和不定根侧根长均不同程度地受到糖浓度的影响,高浓度糖诱导活性氧产生,缺糖则导致根系的质子分泌能力降低。但是在相同浓度的糖处理条件下,锌诱导这些指标的变化与无锌处理的结果明显不同。相同浓度的葡萄糖和甘露醇对根系生长的影响有显著差异,说明这种变化是由糖信号而非渗透势引起的。[结论]这些结果表明,在正常和锌处理条件下葡萄糖对水稻根系的生长都具有重要的调节作用。