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UV-Effects on Young Seedlings of Soybean: Effects in Early Development and Long-Term Effects

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UV Radiation in Global Climate Change

Abstract

Young plants are the most susceptible to ultraviolet (UV) radiation, due to the large number of growing and dividing cells. Incident UV radiation to earth has increased, even at temperate latitudes. Chronic exposure to UV light, especially UV-B (290 nm – 320 nm) radiation, causes damage to land plants including reduced photosynthetic capacity, biomass yield, nutritional quality of the seed, altered patterns of species competition, plant ultrastructure and pigment production, and increased incidence of disease. Hence it is important to know how exposures early in the life cycle of the plant affect the establishment of the seedling and the production of viable seed. We found that the greatest affects of UV-B occurred very early in the plant’s life cycle, notably in the first week post planting. Aside from increased mortality with increasing UV energy, UV-B treated seedlings had increased deformity, decreased ability to produce viable seeds and dysregulation of phenylpropanoid synthesis, which is dependent upon phenylalanine. Responses to high energy UV-B cause noticeably different effects in different varieties of soybean. If soybean experience higher energy UV in the early stages of growth, the effects can cause heritable changes, which will in turn effect yield and impact the viability of the next generation of seed.

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  1. Department of Biological Sciences m/c 567, University of Illinois at Chicago, 900 S. Ashland Ave, Chicago, IL, 60607, USA

    Katherine M. Warpeha & Lon S. Kaufman

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  1. Katherine M. Warpeha
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  2. Lon S. Kaufman
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  1. Natural Resource Ecology Laboratory, Colorado State University, USA

    Wei Gao  & James R. Slusser  & 

  2. Cooperative State Research Education & Extension Service, Waterfront Centre, Ste.3422 800 9th Street SW, Washington DC, 20024, USA

    Daniel L. Schmoldt

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Warpeha, K.M., Kaufman, L.S. (2010). UV-Effects on Young Seedlings of Soybean: Effects in Early Development and Long-Term Effects. In: Gao, W., Slusser, J.R., Schmoldt, D.L. (eds) UV Radiation in Global Climate Change. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-03313-1_17

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