Effect of illuminance on photosynthetic efficiency and main flavonoids content in Taraxacum mongolicum

doi:10.14088/j.cnki.issn0439-8114.2021.05.015

Abstract

Abstract: Aiming to investigate the relationship among illuminance and photosynthetic efficiency and accumulation of five main flavonoids in Taraxacum mongolicum Hand.-Mazz., five different light intensities treatments were applied including light transmittance 100.0%（average illuminance 15 882 lx）, 82.8%（average illuminance 13 116 lx）, 60.3%（average illuminance 9 545 lx）, 37.9%（average illuminance 6 003 lx） and 14.5%（average illuminance 2 303 lx） during the growth of Taraxacum mongolicum, then the photosynthetic parameters and the content of five main flavonoids were determined by plant photosynthesis analyzer and high performance liquid chromatography（HPLC）. The results showed that, the highest accumulation was observed in five main flavonoids under the light transmittance 60.3% among the five light treatments, which were Rutin 346.85 μg/g, Quercetin 502.75 μg/g, Luteolin 299.53 μg/g, Kaempferol 241.90 μg/g and Isorhamnetin 273.35 μg/g, and the photosynthetic efficiency in control group（100% light transmittance） was the best.There was the highest photosynthetic efficiency under full light conditions,and the light transmittance about 60.3% was most conducive to the accumulation of flavonoids during the cultivation of Taraxacum mongolicum, and the light transmittance below 60.3% is adverse to its growth.

Key words: Taraxacum mongolicum Hand.-Mazz., illuminance, photosynthetic parameters, flavonoids

CLC Number:

R931.71
S647

XU Yi-shen, XIE Xiao-yi, GUO Yang-dong, ZHANG Xi-chun. Effect of illuminance on photosynthetic efficiency and main flavonoids content in Taraxacum mongolicum[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(5): 85-88.

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