| مستخلص: |
An experiment was conducted in hydroponics using rape cultivar Cao 221167. Two treatment of Boron (B), inorganic borate (BA) and organic boron sorbitol (SB) along with different concentrations of Al3+ (0, 100, 200, and 500 µmol L-1). The effects of different forms of B on activities of antioxidant enzyme of leaves in rape seedlings were studied, and the changes of leaf component were analyzed by Fourier Transform Infrared Spectroscopy (FTIR) technique. Under Al toxicity, the addition of BA or SB could alleviate Al toxicity in plant, and significantly increase plant biomass and root length. The root length increased by 52.15%, 101.45%, 366.70%, and 18.73% in BA treatments and 46.80%, 133.98%, 261.36%, and 10.77% in SB treatments under 0, 100, 200, and 500 µmol L-1 Al3+ toxicity stress, respectively. B treatments increased pigment content and SOD activity and reduced contents of Al, MDA, and POD activity. Under the addition of boron (BA or SB), the growth, biomass and pigment content of rape seedlings were higher in 200 µmol L-1 Al3+ treatment than in other treatments. In the 500 µmol L-1 Al3+ treatment, biomass and pigment content of rape seedling were significantly lower than those without Al application. The results from FTIR indicated that the contents of protein and oligosaccharide in leaves of rape seedling significantly increased under Al toxicity, however, significantly decreased when was added boron (BA or SB). In conclusion, the addition of different forms of B (BA or SB) could alleviate Al toxicity and the effect of BA is better than that of SB. The information provided by this study will facilitate alleviating Al toxicity in plant through applying a kind of B fertilizer in agricultural production. [ABSTRACT FROM AUTHOR] |
