Effect of glucose on Zinc-induced growth of root system in rice | ¤绯ㄩ璇卞姘寸圭郴夸腑浣
2011
Zhao Zhenguo, Shandong University of Technology, Zibo (China), School of Life Sciences | Feng Tingting, Shandong University of Technology, Zibo (China), School of Life Sciences | Liu Leyu, Shandong University of Technology, Zibo (China), School of Life Sciences
[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.
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