Abstract

VARGAS-BEJARANO, E et al. Physiological changes in transgenic cotton inoculated with Trichoderma spp. Phyton (B. Aires) [online]. 2012, vol.81, n.1, pp.101-105. ISSN 1851-5657.

We performed the inoculation of transgenic cotton seedlings with Trichoderma sp. strain ICA 4 to evaluate its effects on the physiological development of seedlings. Inoculated seedlings of transgenic cotton had higher development than non-inoculated seedlings. The range of values for relative growth, doubling time, height and number of leaves (0.04 g/g d; 16.88 days; 17.16 cm and 4.2, respectively) were significantly higher that those observed in non-inoculated plants (0.03 g/g day; 24.38 days; 12.33 cm and 2.6, respectively). Regarding radical architecture, inoculated seedlings with Trichoderma strain ICA 4 showed a higher percentage of roots of 2nd (46%), 3rd (73%) and 4th (98%) order with respect to control plants. This indicates that inoculation of Trichoderma strain ICA 4 can promote better nutrient use. Future studies should be designed to evaluate the expression of genes involved in the biosynthesis of plant hormones that could be involved in root development.

Keywords : Transgenic cotton; Trichoderma spp; Root architecture; Valley of Mexicali.

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