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Dimorphic stigmas, pollen accumulation, and seed production in the gynodioecious plant Arenaria merckioides var. chokaiensis (Caryophyllaceae) / Takashi Sugawara in Acta Phytotaxonomica et Geobotanica, 50 (1) (08/1999) 

Public Citation [article]  inActa Phytotaxonomica et Geobotanica > 50 (1) (08/1999) . - 13-20 Titre : Dimorphic stigmas, pollen accumulation, and seed production in the gynodioecious plant Arenaria merckioides var. chokaiensis (Caryophyllaceae) Type de document : Imprimé Auteurs : Takashi Sugawara ; Yujiro Horri Année de publication : 1999 Article en page(s) : 13-20 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Biologie de la reproduction [CBNPMP-Thématique] Stratégie de production de semences (fécondité) Mots-clés : Arenaria Résumé : In the gynodioecious plant Arenaria merckioides var. chokaiensis, stigma length is significantly longer in female flowers than in hermaphrodite flowers. To elucidate the functional significance of dimorphic stigmas we determined the number of pollen grains actually deposited on the stigmas and fruit and seed set percentages of hermaphrodite and female plants in a natural population. The number of pollen grains on the stigma was much less in female flowers than in hermaphrodite flowers, so the longer stigmas of the female plants are unlikely to increase the ability to trap pollen grains over the hermaphrodite plants in field. Fruit set percentage and average number of seeds per flower in the female plants were usually larger than those in the hermaphrodite plants. Lower seed set in the hermaphrodite plants is in contrast to the greater amount of pollen deposited on their stigmas. The reason may be due to selfing, because fruit and seed set percentages of the self-pollinated hermaphrodite flowers are usually less than in cross-pollinated flowers. Lien pérenne : DOI : 10.18942/bunruichiri.KJ00001077403 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=137509 Sugawara, Takashi, Horri, Yujiro 1999 Dimorphic stigmas, pollen accumulation, and seed production in the gynodioecious plant Arenaria merckioides var. chokaiensis (Caryophyllaceae). Acta Phytotaxonomica et Geobotanica, 50(1): 13-20.

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Consultable Article (1999) URL

Floral and reproductive biology of gynodioecious Dianthus superbus L. var. superbus (Caryophyllaceae) / Takashi Sugawara in Acta Phytotaxonomica et Geobotanica, 45 (1) (1994) 

Public Citation [article]  inActa Phytotaxonomica et Geobotanica > 45 (1) (1994) . - 23-31 Titre : Floral and reproductive biology of gynodioecious Dianthus superbus L. var. superbus (Caryophyllaceae) Type de document : Imprimé Auteurs : Takashi Sugawara ; A. Nakamura ; M. Kanbayashi ; H. Hoshi ; M. Mikami Année de publication : 1994 Article en page(s) : 23-31 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Biologie de la reproduction Mots-clés : Dianthus superbus L. Résumé : Two populations of Dianthus superbus L. var. superbus were investigated in Aomori Prefecture to determine the extent of differences between hermaphrodite and female plants in floral morphology, reproductive ability of the flowers, and fruit and seed set in the field. The hermaphrodite flowers were protandrous, but partially self-compatible in pollinalion experiments, and morphologically characterized by larger petals and a longer calyx tube. The female flowers had smaller petals, shorter filaments, and abortive anthers. No significant difference was found between the genders in ovule number per flower, fruit set percentage, and in the kinds of insects visiting the flowers. However, a notable difference in flowering phenology was found between the two different types of flowers ; the stigmas of the female flowers mature earlier than stigmas in hermaphrodite flowers, and the flowering period of female flowers is obviously longer than for hermaphrodite flowers. Earlier maturation of the stigma and longer female flowering may enhance the chance of pollination in female flowers. However, it was revealed from the field observations that seed set percentages in hermaphrodite flowers were significantly higher than in female flowers. Lien pérenne : DOI : 10.18942/bunruichiri.KJ00001079027 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=137316 Sugawara, Takashi, Nakamura, A., Kanbayashi, M., Hoshi, H., Mikami, M. 1994 Floral and reproductive biology of gynodioecious Dianthus superbus L. var. superbus (Caryophyllaceae). Acta Phytotaxonomica et Geobotanica, 45(1): 23-31.

Documents numériques

Consultable article (1994) URL