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Revista Colombiana de Ciencias Hortícolas

versão impressa ISSN 2011-2173

Resumo

BARACALDO, ADRIANA et al. Waterlogging affects the growth and biomass production of chonto tomatoes (Solanum lycopersicum L.), cultivated under shading. rev.colomb.cienc.hortic. [online]. 2014, vol.8, n.1, pp.92-102. ISSN 2011-2173.

Waterlogging and flooding stress have become major abiotic stress factors for the growth, development and productivity of crops. To study the effect of waterlogging on the chonto tomato long-life Roble F1 hybrid, an experiment was conducted in a plastic greenhouse, with and without black shade netting (with the 56.4% light reduction on a sunny day). Plastic pots (1 L capacity) were used with blond peat mixed with organic soil at a 1:1 proportion, which were waterlogged up to 4 cm above the substrate for 4, 8 and 12 days. The assessed variables included plant height, number of leaves and fruits, and dry biomass of the organs. The study showed that 4, 8, and 12 days of waterlogging reduced the plant height and number of leaves after 12 and 16 days from waterlogging initiation, respectively; while the number of fruits was significantly lower at 40 dwi, when the evaluation period finished. The root hypoxia in the plants waterlogged for 8 and 12 days reduced plant dry biomass production, especially in the fruits and roots; while the 12-days-waterlogging x shading interaction impaired the total plant dry mass. In general, the tomato plant seems to be adapted to the effect of this type of shading. Increased periods of waterlogging were accompanied by symptoms such as chlorosis, abscission of basal leaves, leaf epinasty, reddish coloring, and formation of adventitious roots.

Palavras-chave : plant height; leaf number; dry mass; symptomatology; epinasty; adventitious roots.

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