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Plant and Cell Physiology, 1997, Vol. 38, No. 2 107-112
© 1997

A Connection between the Self-Incompatibility Mechanism and the Stress Response in Lily

Takafumi Tezuka1,3, Akiko Tsuruhara1, Hajime Suzuki1 and Susumu Y. Takahashi2

1 Division of Informatics for Natural Sciences, Graduate School of Human Informatics, Nagoya University Chikusa-ku, Nagoya, 46401 Japan
2 Department of Veterinary Medicine, Faculty of Agricultural Sciences, Yamaguchi University Yamaguchi, 753 Japan

3To whom correspondence should be addressed.

An attempt was made to examine the possible connection between self-incompatibility in Lilium longiflorum and the stress response using pistils after self-incompatible pollination. The growth of pollen tubes in the pistil after self-incompatible pollination was promoted by treatment with germanium compounds [(GeCH2CH2COOH)2O3 and GeO2], which are scavengers of active oxygen species, such as O2– and H2O2. The promotion by germanium compounds of the growth of pollen tubes after self-incompatible pollination was reflected by the detection of elevated levels of activity of superoxide-forming NADPH-dependent oxidase, xanthine oxidase, superoxide dismutase, catalase and ascorbate peroxidase, all of which are associated with stress responses, in pistils upon self-incompatible pollination as compared to the activities of these enzymes after cross-compatible pollination. A possible connection between self-incompatibility and stress in pistils upon self-incompatible pollination is discussed on the basis of these results.

(Received October 9, 1995; Accepted November 11, 1996)
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A. Tsuruhara and T. Tezuka
Relationship between the Self-Incompatibility and cAMP Level in Lilium longiflorum
Plant Cell Physiol., November 1, 2001; 42(11): 1234 - 1238.
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