Rice plant response to suspension of the lamina of water. Part III

The research was at the Experimental Station of Zaidin, Granada, Spain carried out, with the objective of evaluating the physiological and biochemical response of the rice plant, grown under anaerobic conditions and exposed to a suspension of the water sheet for a period of 15 days in agricultural performance. Rice plants (cv. 'INCA LP-5') were under semi-controlled conditions grown in plastic pots. The suspension of the water sheet was at three moments of its development carried out, at 30, 40 and 50 days after the transplant (DAT). Agricultural performance, the number of panicles per plant, full grains per panicle and the mass of 100 grains, at 147 DAT were evaluated. A performance correlation was with the height of the plant made, fresh aerial mass and roots, foliar water potential, stomatic conductance, foliar content of hydrogen peroxide and oxidative damage to lipids, which were at 122 DAT evaluated. It was obtained that, the number of panicles per plant and the full grains per panicle were favored with the application of water stress, indicators that contributed to the increase of agricultural yield in treatments exposed to water stress (30 DAT=23 %, 40 DAT=20 % and 50 DAT=11 %, compared to the witness). Agricultural yield was correlated with plant height, fresh aerial and root mass, foliar water potential, stomatic conductance, hydrogen peroxide foliar contents and oxidative lipid damage. Key word: Hydrogen peroxide, Oryza sativa, water stress, lipid peroxidation, recovery