Journal of Ecology and Rural Environment ›› 2018, Vol. 34 ›› Issue (6): 541-546.doi: 10.11934/j.issn.1673-4831.2018.06.009

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Effects of Cultivation of Drought-Resistance and Salt-Tolerance Transgenic Cotton on Soil Nematode Community

GUO Jia-hui1,2, LI Gang1, ZHAO Jian-ning1, YANG Dian-lin1, YAN Feng-ming2, XIU Wei-ming1,2   

  1. 1. Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China;
    2. College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
  • Received:2017-09-06 Online:2018-06-25 Published:2018-06-14


Being an important indicator of soil quality, soil nematode has been set as one of the critical indices for environmental safety assessment of transgenic crops. During the period of 2014-2015, a field experiment was conducted on effects of drought-resistance transgenic cotton 013011 and salt-tolerance transgenic cotton 013018 on soil nematode community structure. At the end of the experiment, a total of 34 genera of soil nematodes were detected and identified to be 13 genera of bacteria-feeding nematodes, 3 genera of fungi-feeding nematodes, 9 genera of predatory nematodes and 9 genera of herbivorous nematodes, among which Cephalobus, Eucephalobus and Helicotylenchus were dominant ones. Compared with CK planted with corresponding non-transgenic cotton, all the treatments did not vary much in all ecological indices and trophic groups, except in the treatment planted with 013011 where the abundance of soil nematodes dropped drastically, but the abundance of bacteria-feeding ones increased significantly (P<0.05). And in the treatment planted with 013018, the abundance of soil nematodes, bacteria-feeding nematodes and predatory nematodes exhibited significant difference or extremely significant difference from those in CK relative to sampling time. The treatment planted with 013011 also differed significantly or ultra-significantly from the CK planted with TH2, a corresponding non-transgenic cotton in soil nematodes thoroughfare index, maturity index and herbivorous nematodes index relative to sampling time. The comparisons between the treatments planted with 013011 and 013018 and their CKs show that Mesorhabditis and Thornia varied significantly in relative abundance, while dominant genera of soil nematodes did not.

Key words: drought-resistance transgenic cotton, salt-tolerance transgenic cotton, soil nematode, diversity, community structure

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