Deepak Kumar, H. Singh, U. Bhatt, J. Sharma, Shubhangani Sharma, V. Soni
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引用次数: 2
摘要
在本研究中,我们研究了含羞草(Mimosa pudica)的光质和光周期依赖性生理性能。在白光、蓝光、绿光和红光组合下盆栽,每天12 h (12/12 h)和每天24 h (24/0 h),连续12 d。12 d后,测定植株形态、鲜重、叶绿素荧光和抗氧化剂、脂质过氧化、色素含量、碳水化合物含量等生化指标。在红、蓝、绿光下发现坏死,实验结束时植株衰老。蓝光24h下色素和抗氧化剂含量最高,绿光24h下含量最低。OJIP曲线在白光下是完整的,因此在红、蓝、绿光下还没有完全形成。现象参数在不同光照条件下也有波动。光合作用最终导致淀粉含量,在蓝光下淀粉含量最高,在红光下淀粉含量最低。不同的单色光质量通过降低植物光合机构的活性来抑制植物生长。白光对植物的光合作用和生长促进作用更有效,而绿光和红光对植物的生长有抑制作用。24 h的光周期还伴随着各种光谱,从而降低了植株的生长。结果清楚地表明,在温室中种植植物必须考虑光周期和光谱。
Physiological Performance of Mimosa pudica L. under Different Light Quality and Photoperiods
In the present study, we examined the light quality and photoperiod-dependent physiological performance of Mimosa pudica. Plants were grown in pots under white, blue, green and red-light compositions under 12 h per day (12/12 h) and 24 h per day (24/0 h) for 12 days. After 12 days, the physiological parameters’ morphology, fresh weight, chlorophyll fluorescence and biochemical analyses, which include antioxidants, lipid peroxidation, pigment content and carbohydrate content were also measured. Necrosis was found in red, blue and green light and the plant was senesced at the end of the experiment. The blue 24-h light period showed the highest pigment and antioxidant content, whereas the lowest was observed in green light conditions. The OJIP curve was complete in white light, hence it was not completely formed in red, blue and green light. The phenomenological parameters also fluctuated in different light conditions. Photosynthesis ultimately results in starch content, which was highest in blue light and lowest in red light. Different monochromatic light qualities inhibited plant growth by reducing the activity of photosynthetic apparatus in plants. White light was more effective in driving photosynthesis and promoting the plant growth, while green and red light showed a suppressive effect on plants’ growth. The 24 h photoperiod was also accompanied by various spectra to reduce the plants’ growth. The results clearly indicate that the photoperiod and light spectrum must be considered before growing plants in a greenhouse.