Do water regimes affect iron-plaque formation and microbial communities in the rhizosphere of paddy rice?
Xue-Ping Chen, Wei-Dong Kong, Ji-Zheng He, Wen-Ju Liu, Sally E Smith, F Andrew Smith, Yong-Guan Zhu
Journal of Plant Nutrition and Soil Science | WILEY-V C H VERLAG GMBH | Published : 2008
Pot experiments were conducted to investigate the effect of soil water regimes on the formation of iron (Fe) plaque on the root surface of rice seedlings (Oryza sativa L.) and on the microbial functional diversity in a paddy soil. The rice seedlings were subjected to three moisture regimes (submergence, 100%, and 60% water-holding capacity [WHC]), and were grown for 5 and 11 weeks. Aerobic lithotrophic Fe(II)-oxidizing (FeOB) and acetate-utilizing Fe(III)-reducing bacteria (FeRB) in the rhizosphere and non-rhizosphere soil were determined at 5 weeks using the most probable number (MPN) method. The carbon substrate use patterns of the microbial communities in the rhizosphere and non-rhizosphe..View full abstract