Impact of enhanced ultraviolet-B irradiance on maize yield and its seed qualities: a field evaluation

Wei Gao; Youfei Zheng; James R. Slusser; Gordon M. Heisler; Douliang He; Jianqiang Xu

doi:10.1117/12.466201

1 July 2003 Impact of enhanced ultraviolet-B irradiance on maize yield and its seed qualities: a field evaluation

Wei Gao, Youfei Zheng, James R. Slusser, Gordon M. Heisler, Douliang He, Jianqiang Xu

Proceedings Volume 4896, Ultraviolet Ground- and Space-based Measurements, Models, and Effects II; (2003) https://doi.org/10.1117/12.466201
Event: Third International Asia-Pacific Environmental Remote Sensing Remote Sensing of the Atmosphere, Ocean, Environment, and Space, 2002, Hangzhou, China

Abstract

Stratospheric ozone depletion has caused an increase in the amount of UV-B radiation reaching the earth’s surface. Numerous investigations have demonstrated that the effect of UV-B enhancements on plants includes reduction in grain yield, alteration in species competition, susceptibility to disease, and changes in plant structure and pigmentation. Many experiments examining UV-B radiation effects on plants were conducted in growth chambers or greenhouses. It has been questioned if the effect of UV-B radiation on plants can be extrapolated to field responses from indoor studies because of the unnaturally high ratios of UV-B/UV-A and UV-B/PAR in many indoor studies. Field studies on UV-B radiation effect on plants has been recommended in order to use the UV and PAR irradiance provided by natural light. This study reported the growth and yield responses of a maize crop exposed to enhanced UV-B radiation and the UV-B effects on maize seed qualities under field conditions. Enhanced UV-B radiation caused a significant reduction of the dry matter accumulation, and the maize yield in turn was affected. With increased UV-B radiation the flavonoid accumulation in maize leaves increased, and the contents of chlorophyll a, b, and (a+b) of maize leaves were reduced. The levels of protein, sugar, and starch of maize seed decreased with enhanced UV-B radiation, while the level of lysine increased with enhanced UV-B radiation.

Citation Download Citation

Wei Gao, Youfei Zheng, James R. Slusser, Gordon M. Heisler, Douliang He, and Jianqiang Xu "Impact of enhanced ultraviolet-B irradiance on maize yield and its seed qualities: a field evaluation", Proc. SPIE 4896, Ultraviolet Ground- and Space-based Measurements, Models, and Effects II, (1 July 2003); https://doi.org/10.1117/12.466201

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KEYWORDS

Lamps

Radiation effects

Ultraviolet radiation

Proteins

Ozone

Ear

Photosynthesis

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