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In vitro germination and pollen tube growth of maize (Zea mays) pollen. IX. Pollen source genotype and nonionic surfactant interactions



In vitro germination and pollen tube growth of maize (Zea mays) pollen. IX. Pollen source genotype and nonionic surfactant interactions



Canadian Journal of Botany 58(5): 557-561



Because of their structure and active metabolic state, pollen grains are vulnerable to any agent in the in vitro germination medium. Surfactants are used in biological systems to reduce surface tension but are also known to produce subtle biochemical effects. This study investigated the effect of 3 nonionic surfactants on the germination characteristics of pollen grains from 3 pollen source genotypes. Pollen grains from 3 single cross hybrids (Wf9 .times. H55, K64 .times. K55, Ky228 .times. Ky 226) were cultured on an artificial medium (15% sucrose, 0.6% bacto-agar, 0.03% calcium nitrate, 0.01% boric acid) supplemented with all possible combinations of 3 concentrations (10, 100, 1000 ppm vol/vol) of the following surfactants: Tween 80 (polyoxyethylene sorbitan monooleate); X-114 (alkyl phenoxypolyethoxy ethanol); and commercial sticker spreader (alkyl olefin aromatic polymers). A control containing no supplement was included. Over all genotypes, increasing concentrations of Tween 80 had the least effect on the germination characteristics measured (germination and ruptured percent, pollen tube length at 1, 2 and 3 h after inoculation) and X-114 had the greatest effect with no germination found above 10 ppm. For most of the germination characteristics, highly significant pollen source genotype X concentration interactions were found for each surfactant. The direction and magnitude of the surfactant effects depended on the surfactant, its concentration, the germination characteristic involved and the pollen source genotype.

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Accession: 000678253

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DOI: 10.1139/b80-068



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