Proline, diamine and polyamines accumulation in wheat cultivars submitted to water deficits

Abstract

The objective of this work was to evaluate two wheat (Triticum aestivum L.) cultivars, Anahuac and IAC-24, developed in sandy texture soil, under three levels of soil humidity (-0.027 to -0.1 MPa; -0.027 to -0.045 MPa; and -0.027 MPa - constantly irrigated). The variation in the levels of proline, diamine (putrescine) and polyamines (spermine and spermidine) content and the relative water content (RWC) during the tillering, booting, flowering and grain-filling was determined. The plants under water deficits presented smaller RWC and higher levels of proline and putrescine. In relation to the polyamines it wasn't observed difference among the treatments. The cv. IAC-24 under water deficit presented a higher content of proline and putrescine while the Anahuac showed the same results in the treatments without water deficit.