Cry1Ac expression in transgenic Bt cotton hybrids is influenced by soil moisture and depth

Cry1Ac toxin concentration was assessed in leaves of Bt transgenic cotton hybrid grown on shallow (<60 cm) and deep (>90 cm) black soils of Nagpur, Maharashtra, India. Cry toxin concentration increased up to 80 days after sowing followed by a steep decline. In general, toxin concentration was...

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Bibliographic Details
Published inCurrent science (Bangalore) Vol. 101; no. 6; pp. 783 - 786
Main Authors Blaise, D., Kranthi, K. R.
Format Journal Article
LanguageEnglish
Published Current Science Association 25.09.2011
Subjects
Agricultural soils
Agrology
Cotton
RESEARCH COMMUNICATIONS
Soil depth
Soil samples
Soil toxicity
Soil water
Soil water content
Soil water deficit
Toxins
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Summary:Cry1Ac toxin concentration was assessed in leaves of Bt transgenic cotton hybrid grown on shallow (<60 cm) and deep (>90 cm) black soils of Nagpur, Maharashtra, India. Cry toxin concentration increased up to 80 days after sowing followed by a steep decline. In general, toxin concentration was greater on the deep black soils than the shallow soil. This was because of greater water-holding capacity of the deep soils. Cry toxin concentration was closely related to the soil water content. Beyond (excess moisture) and below (moisture deficit) field capacity, toxin concentration declined. A cubic polynomial best described the relationship between Cry toxin concentration and soil moisture content (R2 = 0.95).
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ISSN:0011-3891