PMID- 24534157 OWN - NLM STAT- MEDLINE DCOM- 20141022 LR - 20181202 IS - 1879-1298 (Electronic) IS - 0045-6535 (Linking) VI - 108 DP - 2014 Aug TI - The ecological roles of Bacillus thuringiensis within phyllosphere environments. PG - 258-64 LID - S0045-6535(14)00116-7 [pii] LID - 10.1016/j.chemosphere.2014.01.050 [doi] AB - Bacillus thuringiensis (Bt) is one of the most used bio-control agents to control plant insects, but little is known about its effect on the microbial population and communities on plant leaves. With the culture dependent method, it has been observed that the dynamics of Bt within the phyllosphere varied dependent on both the doses of Bt sprayed on the leaves and the plant species, however, Bt's population size kept stable at about 1000 cfu g(-1) after 15 d since inoculation. By comparing the bacterial abundances and community structures within the phyllosphere of three plant species, we confirmed that Bt at the doses of 1.5x10(7) and 1.5x10(9) cfu mL(-1) respectively did not significantly influence the natural bacterial population size on the leaf surfaces based on culture dependent assay. However, based on culture independent denaturing gradient gel electrophoresis (DGGE), Shannon-Wiener index (H') and Unweighted Pair Group Method with Arithmetic Mean (UPGMA) analysis, Bt has a significant influence on the bacterial communities within the phyllosphere of amaranth and cotton, but not rice. These results indicate that Bt exhibits different behaviors and ecological roles on the microbial diversity within the phyllosphere, and its environmental safety has to be concerned and evaluated in the future. CI - Copyright (c) 2014 Elsevier Ltd. All rights reserved. FAU - Wang, Xiaoxian AU - Wang X AD - State Key Laboratory of Pharmaceutical Biotechnology, School of Life Science, Nanjing University, Hankou Road 22, Nanjing 210093, PR China. FAU - Xue, Yarong AU - Xue Y AD - State Key Laboratory of Pharmaceutical Biotechnology, School of Life Science, Nanjing University, Hankou Road 22, Nanjing 210093, PR China. Electronic address: xueyr@nju.edu.cn. FAU - Han, Meizhe AU - Han M AD - State Key Laboratory of Pharmaceutical Biotechnology, School of Life Science, Nanjing University, Hankou Road 22, Nanjing 210093, PR China. FAU - Bu, Yuanqing AU - Bu Y AD - Nanjing Institute of Environmental Sciences, MEP, Jiang Wang Miao Street 8, Nanjing 210042, PR China. FAU - Liu, Changhong AU - Liu C AD - State Key Laboratory of Pharmaceutical Biotechnology, School of Life Science, Nanjing University, Hankou Road 22, Nanjing 210093, PR China. Electronic address: chliu@nju.edu.cn. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140215 PL - England TA - Chemosphere JT - Chemosphere JID - 0320657 RN - 0 (RNA, Ribosomal, 16S) SB - IM MH - Amaranthus/metabolism/microbiology MH - Antibiosis MH - Bacillus thuringiensis/genetics/growth & development/*physiology MH - Biodiversity MH - *Ecological and Environmental Phenomena MH - Electrophoresis, Gel, Pulsed-Field MH - Gossypium/metabolism/microbiology MH - Oryza/metabolism/microbiology MH - Plant Leaves/genetics/metabolism/microbiology MH - Polymerase Chain Reaction MH - RNA, Ribosomal, 16S/genetics/metabolism OTO - NOTNLM OT - Bacillus thuringiensis OT - Community structure OT - Microbial population OT - Phyllosphere EDAT- 2014/02/19 06:00 MHDA- 2014/10/23 06:00 CRDT- 2014/02/19 06:00 PHST- 2013/06/11 00:00 [received] PHST- 2013/12/10 00:00 [revised] PHST- 2014/01/12 00:00 [accepted] PHST- 2014/02/19 06:00 [entrez] PHST- 2014/02/19 06:00 [pubmed] PHST- 2014/10/23 06:00 [medline] AID - S0045-6535(14)00116-7 [pii] AID - 10.1016/j.chemosphere.2014.01.050 [doi] PST - ppublish SO - Chemosphere. 2014 Aug;108:258-64. doi: 10.1016/j.chemosphere.2014.01.050. Epub 2014 Feb 15.