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| Web URL(s): | https://academic.oup.com/aob/article/42/6/1305/148782
Last checked: 02/15/2017
Notes: Guide page |
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| Publication Type:
| Refereed |
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| Author(s): | Warrington, I. J.;
Edge, E. A.;
Green, L. M. |
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| Author Affiliation: | Plant Physiology Division, DSIR, Palmerston, North, New Zealand |
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| Title: | Plant growth under high radiant energy fluxes |
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| Source: | Annals of Botany. Vol. 42, No. 6, November 1978, p. 1305-1313. |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Radiation; Lolium perenne; Paspalum dilatatum; Glycine max; Temperatures; Photosynthesis; Irradiance; Light; Tillering; Leaves
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| Geographic Terms: | New Zealand |
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| Abstract/Contents: | "Radiant energy flux density equivalent to peak midday mid-summer sunlight was simulated in an artificially lit controlled environment chamber. High pressure multivapour discharge lamps together with tungsten iodide lamps, installed to give 5路1 kW m-2 of plant growing space, produced a mean photosynthetically active radiant energy flux density of 385 W m-2, 2 m below the thermal barrier, during the course of the experiments. Maize, sorghum, paspalum, ryegrass and soya bean were grown for 28 days from early seedling development at two temperatures (27路5/22路5 掳C, 17路5/12路5 掳C, day/night) and three irradiance levels simulating one quarter (LL), one-half (ML) and full (HL) peak mid-summer sunlight over 12 h days. Shoot d. wt increased markedly between the LL and ML treatments but only slightly, if at all, between the ML and HL treatments. In comparison with ML treatment plants, those from the HL treatment had shorter main stems, more tillers and fewer, thicker main shoot leaves. Net assimilation rate increased and leaf area ratio decreased with increasing irradiance. As a consequence, relative growth rate did not increase when irradiance exceeded the ML treatment levels. These results suggest that irradiance levels of approximately half-full daylight values are adequate for most routine controlled environment studies where there is little mutual shading between or within plants. Major laboratories must, however, provide high irradiance lighting systems to meet the needs of specialist studies." |
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| Language: | English |
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| References: | 19 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Warrington, I. J., E. A. Edge, and L. M. Green. 1978. Plant growth under high radiant energy fluxes. Ann. Bot. 42(6):p. 1305-1313. |
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| Web URL(s):
https://academic.oup.com/aob/article/42/6/1305/148782
Last checked: 02/15/2017
Notes: Guide page |
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MSU catalog number: QK 1 .A53 |
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