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Plant and Cell Physiology, 1999, Vol. 40, No. 2 143-148
© 1999

Cycloprodigiosin Hydrochloride Inhibits Acidification of the Plant Vacuole

Tsuyoshi Nakayasu1, Keiko Kawauchi, Hajime Hirata and Teruo Shimmen

Department of Life Science, Faculty of Science, Himeji Institute of Technology Harima Science Park City, Hyogo, 678-1297 Japan

1 Fax, 81-7915-8-0175; e-mail, nakayasu{at}sci.himeji-tech.ac.jp

The effect of cycloprodigiosin hydrochloride (cPrG-HCl), obtained from the marine bacterium Pseudoalteromonas denitnficans, on acidification of the vacuole was studied in Characeae cells. In internodal cells of Nitella, the plasma membrane of which had been permeabilized, cPrG-HCl inhibited both ATP- and pyrophosphate-dependent acidification of the vacuole. Application of cPrG-HCl to living internodal cells of Chara, induced a significant increase in vacuolar pH. The role of cPrG-HCl as a tool for studying the physiological role of acidic vacuole is discussed.

(Received August 26, 1998; Accepted November 17, 1998)
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T. Nakayasu, K. Kawauchi, H. Hirata, and T. Shimmen
Demonstration of Cl- Requirement for Inhibition of Vacuolar Acidification by Cycloprodigiosin in Situ
Plant Cell Physiol., July 1, 2000; 41(7): 857 - 863.
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