摘要
以‘96-D10’水稻品种为材料,测定了不同脱硫废弃物施用量下盐碱地水稻不同生育期的抗氧化酶活性及膜脂过氧化指标的变化,以探讨脱硫废弃物对水稻生长影响的生理机制及脱硫废弃物对盐碱地改良的效果。结果表明,随着脱硫废弃物施用量的增加,水稻各生育期叶片和根系丙二醛(MDA)含量、细胞质膜相对透性、超氧阴离子自由基(O2.-)产生速率和H2O2含量呈先减少后增加的趋势,超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)的活性则表现为先增加后减少的趋势,且以22.5 t/hm2脱硫废弃物施用量处理在水稻整个生育期内抗氧化保护酶的活性最高,而活性氧的含量和膜脂过氧化作用最低。研究发现,施用22.5 t/hm2脱硫废弃物能够显著提高盐碱地水稻植株不同生育期保护酶活性,减少体内活性氧过量累积,从而增强其耐盐性。
To investigate the effects of desulfurized slag on resistance of the rice seedlings,we tested the antioxidant enzyme activities and lipid peroxidation of the rice seedlings of ＇96-D10＇ on saline-alkali land with different quantities of desulfurized slag supplied.The results show that the content of malondialdehyde（MDA）,the permeability of cell membrane,the oxygen evolution rate and the content of H2O2 in rice blade and root decrease at the beginning and then increase,but the activities of superoxide dismutase（SOD）,peroxidase（POD） and catalase（CAT） increase at the beginning and then decrease.And the desulphation slag 22.5 t/hm2 has the highest protective enzyme activity,the lowest content of active oxygen and the weakest influence of lipid peroxidation.The results suggest that the desulphation slag 22.5 t/hm2 exerts obvious effects on increasing the rice resistance on saline-alkali land.
出处
《西北植物学报》
CAS
CSCD
北大核心
2010年第11期2225-2231,共7页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家科技支撑计划(2007BAC08B01)
关键词
脱硫废弃物
盐碱地
水稻
活性氧代谢
desulfurized slag
saline-alkali land
rice
active oxygen metabolism
