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Anish Malladi and Jacqueline K. Burns

signaling. PGRs can be thought of as components of large signaling networks that communicate information from one part of a plant to another. By way of four examples including the communication of 1) root anaerobiosis—epinasty, 2) soil moisture status

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Kirk D. Larson, Bruce Schaffer and Frederick S. Davies

One-year-old potted `Peach' mango (Mangifera indica L.) trees were flooded at soil temperatures of 15, 22.5 or 30°C. Hypertrophied lenticels were observed after 5-6 days at 30°C and 6-8 days at 22.5°C, but were not observed after 30 days at 15°C. Cells of hypertrophied lenticels were more spherical and randomly arranged than those of nonhypertrophied lenticels, resulting in increased intercellular airspace. Lenticel hypertrophy also occurred on sterns of trees which were kept moist from intermittant misting, and on excised and intact stem sections. Therefore, formation of hypertrophied lenticels in mango occurs independently of root anaerobiosis and is dependent on floodwater temperature.

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Daniel K. MacKinnon, Dale Shaner, Scott Nissen and Phil Westra

. 1996 Growth, fruiting and ethylene binding of tomato plants in response to chronic ethylene exposure J. Hort. Sci. 71 65 69 Bradford, K.J. Dilley, D.R. 1978 Effects of root anaerobiosis on ethylene production, epinasty, and growth of tomato plants Plant