Abstract
In the Iberian Peninsula and Balearic Islands pollen dimorphism was found inTeucrium fruticans L.,T. pseudochamaepitys L., andT. rotundifolium Schreber. Generally, this dimorphism shows two sizes of pollen grains, the smaller more or less collapsed. The percentage of pollen viability is calculated. Differences in size between viable and nonviable pollen grains are similar, being about 40% inT. fruticans andT. pseudochamaepitys, and about 26% inT. rotundifolium. With regard to pollen viability, the percentage of male sterility is higher inT. fruticans, in which from male sterile (ms) plants, 100% nonviable pollen was obtained from every flower observed. InT. pseudochamaepitys andT. rotundifolium with rare exceptions, the percentage of nonviable pollen does not seem to be significant.
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Belhassen, E., Gouyon, P. H., 1986: Flux geniques, perturbations, et gynodioecie chezThymus vulgaris. — Lyon: Collect. Nat. CNRS “Biologie de populations”.
—,Trabaud, L., Couvet, D., Gouyon, P. H., 1989: An example of nonequilibrium processes: gynodioecy ofThymus vulgaris L. in burned habitats. — Evolution43: 662–667.
—,Beltran, M., Couvet, D., Dommée, B., Gouyon, P. H., Olivieri, I., 1990: Evolution des taux de femelles dans les populations naturelles de Thym,Thymus vulgaris L. Deux hypothéses alternatives confirmées. — Compt. Rend. Acad. Sci. Paris, sér. III,310: 371–375.
Díez, M. J., Ojeda, F., Colomer, M., 1991: Contribución a la palinología del géneroTeucrium L. en la Península Ibérica e Islas Baleares y su interés taxonómico. — Lagascalia17 (1) (in press).
Dommee, B. M., Assouad, W., Valdeyron, G., 1978: Natural selection and gynodioecy inThymus vulgaris L. — Bot. J. Linn. Soc.77: 17–28.
Erdtman, G., 1960: The acetolysis method. — Svensk Bot. Tidskr.39: 187–191.
Garcia-Montoya, F., Munoz-Alvarez, J. M., 1988: Ginodioecia enTeucrium fruticans L. Comparación entre formas MF and MS. — Lagascalia (suppl.)15: 691–696.
Gouyon, P. H., Vernet Ph., 1980: Etude de la variabilité génétique dans une population deThymus vulgaris L. — Acta Oecologica1: 165–178.
Hart, J. A., 1985: Evolution of dioecism inLepichinia Willd. sect.Parviflorae (Lamiaceae). — Syst. Bot.10: 147–154.
Hausser, E. J. P., Morrison, J. H., 1964: The cytochemical reduction of nitro blue tetrazolium as an index of pollen viability. — Amer. J. Bot.51: 748–752.
Ietswaart, J. H., Barel, R. A., Ikelaar, M. E., 1984: Male sterility and ecology of dutchOriganum vulgare population. — Acta Bot. Neerl.33: 335–345.
Iwanami, Y., Nakamura, N., 1972: Storage in an organic solvent as a means for preserving viability of pollen grains. — Stain Technol.47: 137–139.
Kaul, M. L. H., 1988: Male sterility in higher plants, pp. 158–176. — London: Springer.
Lewis, D., 1941: Male sterility in natural populations of hermaphrodite plants. — New Phytol.40: 56–63.
Muller, J., 1979: Form and function in angiosperm pollen. — Ann. Missouri Bot. Gard.66: 593–632.
Ortiz, P. L., 1989: Melitopalinología en Andalucía Occidental. — Tesis Doctoral. Universidad de Sevilla, Sevilla.
Shivanna, K. R., Johri, B. M., 1985: The angiosperm pollen: structure and function. — New York: John Wiley & Sons.
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Ojeda, F., Díez, M.J. Pollen dimorphism in threeTeucrium species (Lamiaceae). Pl Syst Evol 183, 43–49 (1992). https://doi.org/10.1007/BF00937734
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DOI: https://doi.org/10.1007/BF00937734