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Published online 1 July 1980
Published in Agron J 72:699-700 (1980)
© 1980 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Preparation of Customized Pressure Chamber Seals for Irregularly-Shaped, Succulent Organs1

Mary L. Neat Simonelli and L. Art Spomer2

The pressure chamber is commonly used to evaluate plant water status. The compression sleeves supplied with commercial units provide inadequate seals on irregularly-shaped, succulent stems or petioles of organ samples. This makes accurate measurements of the water status of organs difficult, if not impossible. This note briefly describes a technique for making customized seals by molding them out of silicone rubber directly onto representative stems or petioles. Such seals have been demonstrated to provide superior sealing action with little or no tissue change.

Key Words: Water potential • Plant water status

1 Contribution from the Dep. of Horticulture, Univ. of Illinois and the Illinois Agric. Exp. Stn. (project 63-393), Urbana, IL 61801. This work supported in part by thc U.S.G.A. Green Section and the Fred Glocckncr Foundation.

2 Former graduate assistant, now assistant professor, Federal Univ. of Rio Grande de Sul, Porto Alegre, Brazil and professor of agronomy, Purdue Univ., respectively.

Received for publication November 14, 1979.




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Copyright © 1980 by the American Society of Agronomy.