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先前的研究考察了红光对玉米 (ZeamaysL .cv .RoyaldentHit85 )胚芽鞘向光性反应的影响。本研究进一步分析了红光对蓝光照射时间依赖型向光性 (TDP)影响的光量 反应曲线 ,发现该反应不像红光对脉冲蓝光诱导的向光性的影响那样属于超低光量反应 ,而是一种低光量反应 ,且之后的脉冲远红光可以逆转红光对TDP影响的效果。但远红光预处理延长后 ,逆转了的TDP反应性可以得到恢复。不仅如此 ,暗适应胚芽鞘接受不同时间的单独远红光预处理后可同样获得与预处理光量成比例的TDP反应性 ,表明暗适应胚芽鞘在接受远红光预处理后亦可建立起对长时间向光性蓝光照射的反应能力。远红光对TDP反应性影响的光量 反应曲线分析揭示 ,该远红光影响依赖于照射时间并要求高光量。鉴于高光量范围内上述远红光影响不符合所谓反比定律 ,远红光对TDP反应性的影响很可能属一高辐照反应。根据上述研究发现探讨了植物光敏素作用模式与不同向光性反应信号转导途径之间可能存在的相互关系。
Previous studies examined the effect of red light on the sheath phototropism of corn (Zeamays L.cv. RoyaldentHit 85). This study further analyzes the light intensity response of red light to time-dependent photoluminescence (TDP) of blue light, and found that the reaction is not like ultra-low light response to the effect of red light on pulsed blue light induced photoluminescence Is a low light response, and the impulse far red light can reverse the effect of red light on TDP. However, after prolonged far-red light pretreatment, the reversed TDP reactivity can be recovered. Not only that, dark adaptation of coleoptile receiving different far red light pretreatment at different times can also get the same proportion of pretreated light TDP reactivity, indicating that dark adapted coleoptile can receive far red light pretreatment can also establish a pair of Long time to light blue light irradiation ability. The analysis of the light response curve of far red light on the reactivity of TDP revealed that this far red light effect depends on the irradiation time and requires a high light amount. In view of the high light intensity range far-infrared effects do not meet the so-called inverse law, far red light on the TDP reactivity is likely to belong to a high radiation response. Based on the above findings, the possible interaction between plant photoproteins and different photoreactive signal transduction pathways was explored.