Relationship between chemical properties of the soil and the occurrence of Bacillus thuringiensis
The soil and other substrates such as mushroom compounds are the main sources of new Bacillus thuringiensis (Bt) isolates for Integrated Pest Management programs. This study describes the relationship between chemical properties of the soil (pH, OM, P3+, K1+, Ca2+, Mg2+, H1++Al3+, B3+, Cu2+, Fe2+, Mn2+ and Zn2+) and the occurrence of Bt in Brazil. A total of 1,197 bacterial colonies were obtained, being 512 of them identified as Bt. The Bt index (iBt), which is the relation between Bt colonies and bacterial counts ranged from 0.18 to 0.86. The iBt may be expressed with the formula: iBt= -0.4 + 0.6Ca2+ + 0.07Cu2+ + 0.009Fe2+ - 0.53Mg2+ -0.12Mn2+ + 1.26Zn2+. A cluster of samples with fewer colonies and a high negative correlation (antagonism) between Mn2+ and Ca2+; Mg2+ and Ca2+; Mg2+ and Zn2+; Mn2+ and Zn2+ and a high positive correlation (synergism) between Mn2+ and Mg2+; Zn2+ and Ca2+ was observed. The relationship between these elements and their effect on the Bt presence are discussed.
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Universidade Federal de Santa Maria
2009
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oai:scielo:S0103-847820090001000012009-01-09Relationship between chemical properties of the soil and the occurrence of Bacillus thuringiensisPolanczyk,Ricardo AntonioZanúncio,José ColaAlves,Sérgio Batista Bt chemical elements entomopathogen soil biological control The soil and other substrates such as mushroom compounds are the main sources of new Bacillus thuringiensis (Bt) isolates for Integrated Pest Management programs. This study describes the relationship between chemical properties of the soil (pH, OM, P3+, K1+, Ca2+, Mg2+, H1++Al3+, B3+, Cu2+, Fe2+, Mn2+ and Zn2+) and the occurrence of Bt in Brazil. A total of 1,197 bacterial colonies were obtained, being 512 of them identified as Bt. The Bt index (iBt), which is the relation between Bt colonies and bacterial counts ranged from 0.18 to 0.86. The iBt may be expressed with the formula: iBt= -0.4 + 0.6Ca2+ + 0.07Cu2+ + 0.009Fe2+ - 0.53Mg2+ -0.12Mn2+ + 1.26Zn2+. A cluster of samples with fewer colonies and a high negative correlation (antagonism) between Mn2+ and Ca2+; Mg2+ and Ca2+; Mg2+ and Zn2+; Mn2+ and Zn2+ and a high positive correlation (synergism) between Mn2+ and Mg2+; Zn2+ and Ca2+ was observed. The relationship between these elements and their effect on the Bt presence are discussed.info:eu-repo/semantics/openAccessUniversidade Federal de Santa MariaCiência Rural v.39 n.1 20092009-02-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000100001en10.1590/S0103-84782009000100001 |
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| author |
Polanczyk,Ricardo Antonio Zanúncio,José Cola Alves,Sérgio Batista |
| spellingShingle |
Polanczyk,Ricardo Antonio Zanúncio,José Cola Alves,Sérgio Batista Relationship between chemical properties of the soil and the occurrence of Bacillus thuringiensis |
| author_facet |
Polanczyk,Ricardo Antonio Zanúncio,José Cola Alves,Sérgio Batista |
| author_sort |
Polanczyk,Ricardo Antonio |
| title |
Relationship between chemical properties of the soil and the occurrence of Bacillus thuringiensis |
| title_short |
Relationship between chemical properties of the soil and the occurrence of Bacillus thuringiensis |
| title_full |
Relationship between chemical properties of the soil and the occurrence of Bacillus thuringiensis |
| title_fullStr |
Relationship between chemical properties of the soil and the occurrence of Bacillus thuringiensis |
| title_full_unstemmed |
Relationship between chemical properties of the soil and the occurrence of Bacillus thuringiensis |
| title_sort |
relationship between chemical properties of the soil and the occurrence of bacillus thuringiensis |
| description |
The soil and other substrates such as mushroom compounds are the main sources of new Bacillus thuringiensis (Bt) isolates for Integrated Pest Management programs. This study describes the relationship between chemical properties of the soil (pH, OM, P3+, K1+, Ca2+, Mg2+, H1++Al3+, B3+, Cu2+, Fe2+, Mn2+ and Zn2+) and the occurrence of Bt in Brazil. A total of 1,197 bacterial colonies were obtained, being 512 of them identified as Bt. The Bt index (iBt), which is the relation between Bt colonies and bacterial counts ranged from 0.18 to 0.86. The iBt may be expressed with the formula: iBt= -0.4 + 0.6Ca2+ + 0.07Cu2+ + 0.009Fe2+ - 0.53Mg2+ -0.12Mn2+ + 1.26Zn2+. A cluster of samples with fewer colonies and a high negative correlation (antagonism) between Mn2+ and Ca2+; Mg2+ and Ca2+; Mg2+ and Zn2+; Mn2+ and Zn2+ and a high positive correlation (synergism) between Mn2+ and Mg2+; Zn2+ and Ca2+ was observed. The relationship between these elements and their effect on the Bt presence are discussed. |
| publisher |
Universidade Federal de Santa Maria |
| publishDate |
2009 |
| url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000100001 |
| work_keys_str_mv |
AT polanczykricardoantonio relationshipbetweenchemicalpropertiesofthesoilandtheoccurrenceofbacillusthuringiensis AT zanunciojosecola relationshipbetweenchemicalpropertiesofthesoilandtheoccurrenceofbacillusthuringiensis AT alvessergiobatista relationshipbetweenchemicalpropertiesofthesoilandtheoccurrenceofbacillusthuringiensis |
| _version_ |
1756405806106935296 |