逆境胁迫对不同耐性大麦基因型籽粒植酸含量的影响

Using 5 tolerant and 5 sensitive lines from each of three barley DH populations developed for evaluation and identification of salinity, acid soil, and waterlogging tolerance, the influence of salinity, acid soil and waterlogging stresses on phytic acid content was investigated. A significant reduction of phytic acid content in barley grains was observed when both types of barley lines were exposed to 200 mM NaCl. The decrease extent under salinity stress varied greatly with genotypes. Acid soil and waterlogging stresses did not caused significant changes in phytic acid content for both tolerant and sensitive lines, indicating that the effect of these two abiotic stresses on nutrient uptake and matter accumulation differs from that of salinity. In the three stresses, phytic acid content in both tolerant and sensitive lines showed no significant difference between the stress treatment and the control, and moreover there was no significant correlation between barley yield and phytic acid content. It may be assumed that phytic acid content in barley grains is not associated with abiotic stress tolerance.