Abstract: To understand the safety of transgenic Bt rice on zooplankton community in paddy fields, a safety evaluation experiment was conducted in 3 consecutive years in Xiangtan, Hunan Province, by using the transgenic Cry1Ab/Ac rice ‘Huahui No. 1’ (HH1 for short) as Bt rice material and the nontransgenic parent rice ‘Minghui63’ (MH63 for short) as control. The zooplankton community in paddy fields was used as bioindicator. The results showed that the similarity coefficients of all species composition and the dominant species of zooplankton community in HH1 and MH63 paddy fields were higher than 0.70 and 0.89, respectively. By comprehensive and temporal dynamic analyses, the parameters of zooplankton community in HH1 paddy fields in 2012, 2013 and 2014 displayed almost equal values and similar trends compared with those in MH63 paddy fields. These results suggested that transgenic Cry1Ab/Ac rice had no obvious adverse effect on zooplankton community in paddy fields.

Key words: root, mitochondria, cotton, p-hydroxybenzoic acid, phloroglucinol.