A connection between the self-incompatibility mechanism and the stress response in lily [Lilium longiflorum]
1997
Tezuka, T. (Nagoya Univ. (Japan)) | Tsuruhara, A. | Suzuki, H. | Takahashi, S.Y.
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, 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 activity 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
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