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Joshua K. Craver, Chad T. Miller, Kimberly A. Williams and Daniel L. Boyle

different means. Two of the most commonly used names when referring to these growths are intumescence, as described previously, and oedema. Oedema is most commonly found on geranium, whereas the term intumescence is more often associated with growths on

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Anusuya Rangarajan and Theodore W. Tibbitts

Oedema, a physiological disorder, affects several cultivars of ivy geranium [Pelargonium peltatum (L.) L `Hér. ex Ait) when grown in greenhouses. This study investigated the regulation of oedema on this crop using far-red radiation because these wavelengths inhibited the injury on Solanaceous sp. Plants were exposed to far-red radiation from Sylvania #232 far-red lamps on abaxial and adaxial surfaces of leaves. A far-red photon flux of 15 to 20 μmol·m-2·s-1 (700-S00 nm) was not effective in preventing oedema injury. A far-red abaxial treatment during the light period tended to reduce the amount of injury that developed when photosynthetic photon flux was low (130-170 μmol·m-2·s-1), but this inhibition of the injury was absent with higher photon flux. The results from these studies indicate the use of supplemental far-red radiation treatments in greenhouses would not be justified because adequate and consistent control of the injury on ivy geraniums was not achieved.

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Joshua K. Craver, Chad T. Miller, Kimberly A. Williams and Nora M. Bello

( Lang and Tibbitts, 1983 ; Morrow and Tibbitts, 1987 ; Rud, 2009 ; Wheeler, 2010 ). Excess water has also been cited as a potential causative factor and is commonly found when referring to the development of oedema on geranium ( Pelargonium sp

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Tomomi Eguchi, Ricardo Hernández and Chieri Kubota

Intumescence injury, also known as edema or oedema is a nonpathogenic physiological disorder characterized visually by abnormal, blister- or callus-like tumor growths that predominantly develop on the surface of leaves and sometimes on petioles and

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Satoru Motoki, Tianli Tang, Takumi Taguchi, Ayaka Kato, Hiromi Ikeura and Tomoo Maeda

white asparagus spears ( Asparagus officinalis L.) Eur. Food Res. Technol. 222 32 35 Selloum, L. Bouriche, H. Tigrine, C. Boudoukha, C. 2003 Anti-inflammatory effect of rutin on rat paw oedema, and on neutrophils chemotaxis and degranulation Exp

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Heidi Marie Wollaeger and Erik S. Runkle

Copper enzymes in isolated chloroplasts. Polyphenoloxidase in Beta vulgaris Plant Physiol. 24 1 15 Balge, R.J. Struckmeyer, B.E. Beck, G.E. 1969 Occurrence, severity and nature of oedema in Pelargonium hortorum Ait J. Amer. Soc. Hort. Sci. 94 181 183

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Cary A. Mitchell

Life Sci. Space Res. 2 43 53 Rangarajan, A. Tibbitts, T.W. 1994 Exposure with far-red radiation for control of oedema injury on ‘Yale’ ivy geranium HortScience 29 38 40 Samuoliene, G. Brazaityte, A. Sirtautas, R. Virsile, A. Sakalauskaite, J