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Effects of Elevated Carbon Dioxide on the Growth and Foliar Chemistry of Transgenic Bt Cotton
Author(s) -
Wu Gang,
Chen FaJun,
Ge Feng,
Sun YuCheng
Publication year - 2007
Publication title -
journal of integrative plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.734
H-Index - 83
eISSN - 1744-7909
pISSN - 1672-9072
DOI - 10.1111/j.1744-7909.2007.00472_1.x
Subject(s) - bt cotton , bacillus thuringiensis , chemistry , horticulture , malvaceae , condensed tannin , carbon dioxide , plant growth , tannin , genetically modified crops , zoology , agronomy , transgene , botany , biology , proanthocyanidin , food science , antioxidant , biochemistry , bacteria , polyphenol , genetics , organic chemistry , gene
A field study was carried out to quantify plant growth and the foliar chemistry of transgenic Bacillus thuringiensis (Bt) cotton (cv. GK‐12) exposed to ambient CO 2 and elevated (double‐ambient) CO 2 for different lengths of time (1, 2 and 3 months) in 2004 and 2005. The results indicated that CO 2 levels significantly affected plant height, leaf area per plant and leaf chemistry of transgenic Bt cotton. Significantly, higher plant height and leaf area per plant were observed after cotton plants that were grown in elevated CO 2 were compared with plants grown in ambient CO 2 for 1, 2 and 3 months in the investigation. Simultaneously, significant interaction between CO 2 level × investigating year was observed in leaf area per plant.Moreover, foliar total amino acids were increased by 14%, 13%, 11% and 12%, 14%, 10% in transgenic Bt cotton after exposed to elevated CO 2 for 1, 2 or 3 months compared with ambient CO 2 in 2004 and 2005, respectively. Condensed tannin occurrence increased by 17%, 11%, 9% in 2004 and 12%, 11%, 9% in 2005 in transgenic Bt cotton after being exposed to elevated CO 2 for 1, 2 or 3 months compared with ambient CO 2 for the same time. However, Bt toxin decreased by 3.0%, 2.9%, 3.1% and 2.4%, 2.5%, 2.9% in transgenic Bt cotton after exposed to elevated CO 2 for 1, 2 or 3 months compared with ambient CO 2 for same time in 2004 and 2005, respectively. Furthermore, there was prominent interaction on the foliar total amino acids between the CO 2 level and the time of cotton plant being exposed to elevated CO 2 . It is presumed that elevated CO 2 can alter the plant growth and hence ultimately the phenotype allocation to foliar chemistical components of transgenic Bt cotton, which may in turn, affect the plant‐herbivore interactions.