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以油桃品种‘曙光’(Prunus persica var.Nectariana cv.Shuguang)为试材,采用呼吸抑制剂法研究光周期处理下叶芽在休眠诱导期抗氰呼吸(交替途径)的发生、运行情况.结果表明:休眠诱导期内,叶芽总呼吸速率(Vt)呈单峰变化,短日照使其降低,诱导高峰期前移,而长日照亦降低Vt,但峰期后移.交替途径容量(Valt)呈双峰曲线变化而实际运行活性(ρValt)则为单峰曲线,两者后期变化不同步.自然低温和短日照共同作用可以显著诱导Valt和ρValt前期高峰期提前,显著降低后期Valt和ρValt.而长日照则对前期高峰具延迟效果,并有利于整个休眠诱导期ρValt的提高.日照长度对叶芽后期Valt高峰期迁移无明显作用.长日照有利于提高抗氰呼吸实际运行活力对总呼吸速率的贡献率,但抗氰呼吸不是主要的电子呼吸传递途径.
Using the nectarine variety Prunus persica var. Nectariana cv.Shuguang as test material, the respiration inhibitor method was used to study the occurrence and operation of cyanide-resistant respiration (alternate pathway) during the photoperiod-induced leaf bud dormancy induction. Results The results showed that the total respiration rate (Vt) of leaf buds showed a unimodal change during the dormancy induction period, which was reduced by short daylight and induced the peak shift, while the long daylight decreased Vt, but the peak was later shifted.The alternative pathway capacity (Valt) (ΡValt) was unimodal curve, and the latter two changes were not synchronized.Cooperation of natural low temperature and short day could significantly induce early pre-peak of Valt and ρValt and significantly reduce late Valt and ρValt. While the long-day sunshine has a delay effect on the previous peak and is conducive to the increase of ρValt during the whole dormancy induction period.The sunshine duration has no significant effect on the peak Valt migration during the late leaf bud period.Long-day sunshine is beneficial to increase the total respiration rate Of the contribution rate, but anti-cyanide breathing is not the main way of electronic respiratory transmission.