Advances in Botanical Research, Vol. 18 by J.A. Callow (Ed.) PDF

By J.A. Callow (Ed.)

ISBN-10: 0120059185

ISBN-13: 9780120059188

This quantity comprises 4 reports overlaying topics of curiosity to a large +ange of botanists. Saxe examines the impression of polluted air on photosynthesis and stomatal functionality, and using physiological and biochemical responses for early detection of damage attributable to rigidity and pollution. Streeter offers and review of the shipping and metabolism of carbon and nitrogen in legume nodules, and van Gardingen and charm talk about the interplay of vegetation with wind, together with the impression of crops on air stream and the ensuing affects on microclimate, and description the latest advances in study in to the physiological responses to wind. the development of fibre optic microprobes and their purposes in measuring the sunshine microenvironment inside of plant tissues are thought of via Vogelman and his colleagues.

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1979). e. g. Bennett and Hill, 1973). 22 H. SAXE 2. Response of diffusive resistance to short-term SO2 exposure Typical responses. g. , 1973; L'Hirondelle and Addison, 1985). , 1979b; Biggs and Davis, 1980; Winner and Mooney, 1980c; Takemoto and Noble, 1982; Natori and Totsuka, 1984a). However at 500600ppb h and with exposures of 2 h or longer, the stomata typically closed, whatever the reaction at lower doses, although there were a few exceptions to this rule (Majernik and Mansfield, 1971). The results obtained by Furukawa et al.

1975a) found dark respiration to be more inhibited by 1-3 ppm NO2 than photosynthesis. , 1975b). Complete recovery was slow. Srivastava et al. (1975b) found no evidence of a photorespiration response to N02. 4. , 1975a). The stomatal response to short-term NO, exposures was much less important than with SO2 or O3 at ambient pollutant levels. Dark respiration was inhibited, but photorespiration was unaffected. C . RESPONSE TO LONG-TERM NO, EXPOSURE I. Photosynthesis response to long-term NO, exposure Typical responses.

Photosynthesis response to short-term NO, exposure Typical responses. , 1975a). The threshold level for photosynthesis response to either gas was about 600ppb with a few hours of exposure (Hill and Bennett, 1970) and 100ppb or less with 20 h of exposure (Capron and Mansfield, 1976). , 1975a). Hill and Bennett (1970) found a linear dose-response in oats and alfalfa photosynthesis with exposures up to 6-8 pprn for both NO and NO2, while Srivastava et al. (1975a) found the response to NOz to be non-linear in Phuseolus bean above 500-1000ppb.

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Advances in Botanical Research, Vol. 18 by J.A. Callow (Ed.)


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