Resumo

RUIZ-SANCHEZ, Michel et al. Response of rice (Oryza sativa L.) plant to suspension of the water lamina in three moments of its development. Part I. cultrop [online]. 2017, vol.38, n.2, pp.61-69. ISSN 0258-5936.

The efficient use of irrigation water in rice cultivation is a priority, due to the volume of water consumed this grain; for this reason the application of alternatives that reduce the volumes of water to use is necessary, without it affecting the agricultural performance. The research was conducted at the Experimental Station of Zaidín, Granada, Spain, in semi-controlled plastic flowerpots conditions with rice plants `INCA LP-5’, which were cultured under anaerobic conditions and were exposed to water deficit by the suspension of the water lamina in three stages, at 30, 40 and 50 DAT for a period of 15 days. It was evident that the suspension of the lamina of water caused water stress on the plant, which manifested itself through decreased air plant growth, leaf water potential and stomatal conductance. On the contrary, the plant root mass, the content of proline, hydrogen peroxide, oxidative damage and antioxidant glutathione content increased, while the reduced ascorbate decreased. In general, the water deficit worsened in the plant when applied to the 50 DAT, regarding the suspension of the water level at 30 DAT

Palavras-chave : antioxidant; stomatal conductance; floow; water; potential hydric.

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