光周期对秋眠型苜蓿Vernal SOD、POD活性的影响

研究了16h(long day,LD)、12h(middle day,MD)8h(short day,SD)三个不同的光照时间对秋眠型苜蓿Vernal超氧化物歧化酶(Superoxide Dismutase,SOD)和过氧化物酶(Peroxidase,POD)活性的影响,为进一步研究苜蓿秋眠性的生理机制奠定基础.结果表明:秋眠型苜蓿Vernal SOD和POD的活性呈现8 h光照处理最高,12h次之,16h最低的趋势;同一光周期条件下,SOD、POD的活性随着生长时间的延长而升高,提示SOD、POD的活性与苜蓿的光周期有关,短日照可提高SOD、POD的活性.

Effects of Photoperiod on SOD and POD Activities in Fall Dormancy Alfalfa (Medicago sativa L. cv. Vernal)

The experiments were conducted to explore the effects of three different photoperiods (16h, long day; 12 h, middle day; 8 h, short day) on superoxide dismutase (SOD) and peroxidase (POD) activi- ties in fall dormancy alfalfa (Medicago sativa L. cv. Vernal). The results showed that: SOD and POD ac- tivities of Medicago sativa L. cv. Vernal were highest under 8h day-length, medium under 12h day- length, and lowest under 16h day-length; under the same day-length, SOD and POD activities of Vernal alfalfa increased with the elongation of growth period. The findings indicated that a significant relationship between SOD and POD activities and photoperiod for alfalfa, short day photoperiod can improve the activi- ties of SOD and POD.