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用呼吸抑制剂和氧肟酸滴定法,在渗透胁迫下测定了两个抗旱性不同的高粱品种三尺三(抗旱性弱)和3197B(抗旱性强)幼苗根中抗氰呼吸的变化。结果表明:正常供水条件下,三尺三根中电子传递以交替途径为主,3197B根中则以细胞色素途径为主。水分胁迫下,三尺三幼苗根中交替途径下降,细胞色素途径上升,转变成以细胞色素途径略占优势,而3197B交替途径运行量增大,细胞色素途径运行量减小,转变成以交替途径为主。
Respiration inhibitors and hydroxamic acid titration were used to measure the respiration of cyanobacteria in two roots of three sorghum varieties with different drought resistance and weak resistance to drought and 3197B (drought resistance). The results showed that under the normal water supply conditions, the electron transfer in three feet of three feet was dominated by alternating pathways, while that in 3197B roots was dominated by cytochromes. Under water stress, the alternate pathway in the root of three-foot three seedlings decreased, the cytochrome pathway increased, and the cytochrome pathway changed slightly to dominate the cytochrome pathway. However, the amount of 3197B alternate pathway increased and the amount of cytochrome pathway decreased, The main approach.