Resumo

MANZANI-LISBOA, Lucas A. et al. Thiamine as a promoter on initial development in varieties of sugarcane. cultrop [online]. 2018, vol.39, n.3, pp. 58-64. ISSN 1819-4087.

This work aims to know thiamine response as a growth promoter in sugarcane varieties. A completely randomized experimental was installed and designed in a double factorial scheme at 3x4 levels, in which the first factor consists of a variety of sugarcane: RB86-7515; RB96-6928 and CTC-4; the second factor was thiamine doses in five levels: zero mg L^-1; 100 mg L^-1; 200 mg L^-1; 400 mg L^-1 and 800 mgL^-1; fifteen treatments were made with five replications, 75 plots in total. Forty five days after planting the following variables were determined: ESI - emergence speed index; ALA - average leaf area; APL - aerial part length; DMAP - dry mass of aerial part ; DMR - dry mass of root; XD - leaf xylem vessel diameter and PD - leaf phloem vessel diameter. It is recommended doses of 400 mg L-1 Thiamine use as a promoter of growth in varieties RB86-7515; RB96-9628 and CTC-4 of sugarcane. Emergence speed index and diameter of xylem vases of leafs in CTC-4 varieties showed a negative response to Thiamine use. However, since the work was conducted only once, more studies are needed to prove the results

Palavras-chave : Saccharum sp.; vitamin; dry mass; xylematyc vasess; phloematic vases.

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