Document Detail

Growth enhancement of soybean (Glycine max) upon exclusion of UV-B and UV-B/A components of solar radiation: characterization of photosynthetic parameters in leaves.
MedLine Citation:
PMID:  17665152     Owner:  NLM     Status:  MEDLINE    
Exclusion of UV (280-380 nm) radiation from the solar spectrum can be an important tool to assess the impact of ambient UV radiation on plant growth and performance of crop plants. The effect of exclusion of UV-B and UV-A from solar radiation on the growth and photosynthetic components in soybean (Glycine max) leaves were investigated. Exclusion of solar UV-B and UV-B/A radiation, enhanced the fresh weight, dry weight, leaf area as well as induced a dramatic increase in plant height, which reflected a net increase in biomass. Dry weight increase per unit leaf area was quite significant upon both UV-B and UV-B/A exclusion from the solar spectrum. However, no changes in chlorophyll a and b contents were observed by exclusion of solar UV radiation but the content of carotenoids was significantly (34-46%) lowered. Analysis of chlorophyll (Chl) fluorescence transient parameters of leaf segments suggested no change in the F v/F m value due to UV-B or UV-B/A exclusion. Only a small reduction in photo-oxidized signal I (P700+)/unit Chl was noted. Interestingly the total soluble protein content per unit leaf area increased by 18% in UV-B/A and 40% in UV-B excluded samples, suggesting a unique upregulation of biosynthesis and accumulation of biomass. Solar UV radiation thus seems to primarily affect the photomorphogenic regulatory system that leads to an enhanced growth of leaves and an enhanced rate of net photosynthesis in soybean, a crop plant of economic importance. The presence of ultra-violet components in sunlight seems to arrest carbon sequestration in plants.
Kadur Guruprasad; Guruprasad Kadur; Swapan Bhattacharjee; Bhattacharjee Swapan; Sunita Kataria; Kataria Sunita; Sanjeev Yadav; Yadav Sanjeev; Arjun Tiwari; Tiwari Arjun; Sanjay Baroniya; Baroniya Sanjay; Abhinav Rajiv; Rajiv Abhinav; Prasanna Mohanty
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-07-31
Journal Detail:
Title:  Photosynthesis research     Volume:  94     ISSN:  0166-8595     ISO Abbreviation:  Photosyn. Res.     Publication Date:    2007 Nov-Dec
Date Detail:
Created Date:  2007-12-06     Completed Date:  2008-03-17     Revised Date:  2008-05-13    
Medline Journal Info:
Nlm Unique ID:  100954728     Medline TA:  Photosynth Res     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  299-306     Citation Subset:  IM    
School of Life Sciences, DAVV, Vigyan Bhawan, Khandwa Road, Indore, 452001, India.
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MeSH Terms
Chlorophyll / metabolism
Photosynthesis / radiation effects*
Plant Leaves / growth & development*,  metabolism,  radiation effects
Soybeans / growth & development*,  metabolism,  radiation effects
Ultraviolet Rays*
Reg. No./Substance:
Erratum In:
Photosynth Res. 2008 Apr;96(1):115
Note: multiple author names added

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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