The response of corn plants (Zea maize) under salinity stress to mycorrhiza collonization

In this study the effects of root colonization and different soils mycorrhiza on the growth of corn (Zea maize) under salinity stress was investigated. Four soil types of different area in Kerman province (Kerman، Bardsir، Baft and Rafsanjan) and three levels of salinity (0، 30 and 60 mM NaCl) were employed. The root colonization percent decreased in the plants grown on Kerman and Baft soils as the salinity increased. The colonization percentage of the plants grown on Bardsir soil increased at 30 mM salinity. The amounts of sugar in leaves and roots of the plants grown on Kerman and Bardsir soils increased but of those grown on Rafsanjan soil decreased. At 30 mM salinity، in some case prolin content increased in leaves and roots of the plants grown on Bardsir and Rafsanjan soils. the amounts of roots Na increased in plants grown on all the soil types. In the leaves، Na concentration in plants grown on different soils type was lower in compared with control plants except of plants grown on soils of Kerman and Rafsanjan at 60 mM salinity. The amount of P in the plant leaves of the plants grown on Kerman Soil، and P contents of the roots on Kerman، Bardsir and Rafsanjan soils increased. According to the results، it is speculated that the most probably mechanism involves in the growth improvement of mycorrhizal plants is preventing of Na uptake and its transition into the leaves.