Rice Science ›› 2015, Vol. 22 ›› Issue (3): 123-131.DOI: 10.1016/S1672-6308(14)60294-8

• Orginal Article • Previous Articles     Next Articles

Different Aluminum Tolerance among Indica, Japonica and Hybrid Rice Varieties

Chang Shu1, Jing-hao Wu1, Gao-ling Shi1, Lai-qing Lou1, Jun-xia Deng1, Jian-lin Wan2, Qing-sheng Cai1   

  1. 1College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
    2Rice Research Institute, Jiangxi Academy of Agricultural Sciences, Nanchang 518057, China
    #These authors contributed equally to this work
  • Received:2014-04-15 Accepted:2015-02-11 Online:2015-05-28 Published:2015-03-27

Abstract:

Hydroponic cultures were conducted to compare the aluminum (Al) tolerance among different rice (Oryza sativa L.) varieties, including indica, japonica and their hybrids. The results showed that the root growth of rice plant was inhibited in different degrees among Al treated varieties. The Al tolerance observed through relative root elongation indicated that five japonica varieties including Longjing 9, Dharial, LGC 1, Ribenyou and Koshihikari were relatively more tolerant than indica varieties. Most indica varieties in this study, such as Aus 373 and 9311 (awnless), were sensitive to Al toxicity. The Al tolerance of most progenies from japonica × indica or indica × japonica crosses was constantly consistent with indica parents. The differences of Al tolerance among Longjing 9 (japonica), Yangdao 6 (indica) and Wuyunjing 7 (japonica) were studied. Biomass and the malondial-dehyde content of Yangdao 6 under Al exposure decreased and increased, respectively, while there was no significant effect on those of Longjing 9 and Wuyunjing 7. Remarkable reduction of root activities was observed in all these three rice varieties. Significantly higher Al content in roots was found in Yangdao 6 compared to Longjing 9 or Wuyunjing 7.

Key words: aluminum tolerance, rice, japonica, indica, hybrid