Abstract

RUIZ SANCHEZ, Michel et al. Arbuscular mycorrhizae symbiosis in plants of rice (Oryza sativa L.) subject to hydric stress: Part I. Physiological response improvement. cultrop [online]. 2012, vol.33, n.4, pp. 47-52. ISSN 0258-5936.

Rice (Oryza sativa L.) is the most important crop for human consumption is grown conventionally in flooded conditions throughout their cycle. However, approximately half the surface of rice in the world does not have sufficient water to maintain optimal growth conditions. One possible way to increase rice production to meet demand is to improve the efficient use of water by arbuscular mycorrhizal fungi (AMF). The research was conducted at the Experimental Station of Zaidín, Granada Spain, with mycorrhizal and non-mycorrhizal rice plant under controlled conditions and with three water management, without stress (25 mL), moderate stress (10 mL) and severe stress (5 mL) for 15 days, in order to evaluate the effect of AMF inoculation of rice plants subjected to hydric stress and after the plants recovered. The results show that rice can benefit from the symbiosis MA and improve long-term development after a period of water stress. In fact, at each level of irrigation, the mycorrhizal plants showed a 50 % increase in aerial fresh mass and 40 % photosynthetic efficiency compared to non-mycorrhizal plants. Besides, the proline content increased with hydric stress in mycorrizal and non-mycorrizal plants.

Keywords : arbuscular mycorrhizal symbiosis; rice; water stress; pephycacy; proline.

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