Wheat Response to a Soil Previously Irrigated with Saline Water

Abstract

A research was conducted aimed at assessing the response of rainfed, lysimeter-grown wheat to various levels of soil salinity, in terms of dry mass production, inorganic and organic components, sucrose phosphate synthase (SPS) and sucrose synthase (SS) activity. One additional scope was the assessment of soil ability to recover from applied salts by means of winter precipitations. The results confirmed the relatively high salt tolerance of wheat, as demonstrated by the mechanisms enacted by plants to contrast salinity at root and leaf level. Some insight was gained in the relationships between salinity and the various inorganic and organic components, as well as with SPS and SS activity. It was demonstrated that in a year with precipitations well below the average values (305 mm vs 500) the leaching action of rain was sufficient to eliminate salts accumulated during summer irrigation with saline water.

Keywords

• salinity
• sugars
• sucrose phosphate synthase
• organic acid
• sorbitol
• proline.