Self-incompatibility recognition in Petunia hybrida

Shivanna, K. R. ; Sharma, Neelam (1985) Self-incompatibility recognition in Petunia hybrida Micron and Microscopica Acta, 16 (4). pp. 233-245. ISSN 0739-6260

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In Petunia hybrida incorporation of crude or dialysed extract of the stigma and style in the germination medium selectively inhibited germination and tube growth of self-pollen, but did not affect the responses of cross-pollen. The extract from self-compatible buds (3 days before anthesis) was not effective in selective inhibition of self-pollen. Incorporation of extracts from different parts of the pistil showed that self- incompatibility recognition molecules are present in the stigmatic exudate, transmitting tissue of the stigma and 2-3 mm of the subjacent style. Using this in vitro bioassay, the role of lectins and sugars in self-incompatibility recognition was investigated. Incorporation of a lectin in the germination medium (containing pistil extract) as well as the treatment of pollen with a suitable sugar before culture was effective in overcoming selective inhibition of self-pollen. Incorporation of a sugar in the germination medium or treatment of pollen with a lectin before culture had no effect on the selective inhibition of self-pollen. Self-incompatibility in vivo could also be overcome by treating the stigma with a lectin or treating the pollen with a sugar before pollination. These results clearly indicate the involvement of lectin-like components of the pollen and specific sugar moiety of the pistil in self-incompatibility recognition.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:49056
Deposited On:18 Jul 2011 12:59
Last Modified:18 Jul 2011 12:59

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