A study of the total ultraviolet exposure to all the leaves for small plant growth

Parisi, A. V. and Wong, J. C. F. and Galea, V. J. (1998) A study of the total ultraviolet exposure to all the leaves for small plant growth. Journal of Photochemistry and Photobiology B: Biology, 45 (1). pp. 36-42. ISSN 1011-1344

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A dosimetric spectrum evaluator was employed to evaluate the total biologically effective UV (UVBE(plant)) on the surface of all the leaves of small plants. It was applied to evaluate the UVBE (plant) to soybean leaves (Glycine max [L.] Merr.), cultivar Essex. The plants received three levels of UVBE (plant) averaged over all the leaves (0, 8.1 and 15.8 J cm-2) from emergence to the V7 growth stage. As canopy closure occurred with plant growth, the ratio of the average of the UVBE (plant) to all leaves compared to that on the uppermost set of leaves changed from 0.85 to 0.50 to 0.29 for the V2, V4 and V7 stages respectively. Measurement of the UVBE (plant) at the top of the canopy would introduce errors of 18%, 100% and 245% at the V2, V4 and V7 stages respectively compared to the actual exposure to the plant leaves. The evaluation of leaf UVBE (plant) allows formulation of models defining plant response such as suppression of plant height and leaf area in terms of the UV exposure to all the leaves along with the effects on the fresh and dry weights of the leaves, stems and roots.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 11 Oct 2007 00:35
Last Modified: 14 Nov 2013 01:11
Uncontrolled Keywords: biologically effective UV; ultraviolet; dosimeters; UV spectrum; UV effects; plants
Fields of Research : 06 Biological Sciences > 0607 Plant Biology > 060705 Plant Physiology
04 Earth Sciences > 0401 Atmospheric Sciences > 040103 Atmospheric Radiation
02 Physical Sciences > 0299 Other Physical Sciences > 029904 Synchrotrons; Accelerators; Instruments and Techniques
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970106 Expanding Knowledge in the Biological Sciences
Identification Number or DOI: 10.1016/S1011-1344(98)00157-2
URI: http://eprints.usq.edu.au/id/eprint/1124

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