Results 161 to 170 of about 1,430 (195)

Pollination ecotypes and the origin of plant species. [PDF]

Proc Biol Sci
Johnson SD.
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A Systematic study of Damnacanthus(Rubiaceae)with special reference to the distyly

A Systematic study of Damnacanthus(Rubiaceae)with special reference to the distyly
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DISTYLY IN OREOCARYA CRASSIPES (BORAGINACEAE), AN ENDANGERED PLANT SPECIES

The Southwestern Naturalist, 2021
Oreocarya crassipes, an endangered angiosperm native to the Trans-Pecos region in southern Brewster County, Texas, exhibits distyly, a breeding system that includes two floral morphs with reciprocal positioning of the anthers and stigmas. The long-style (
J. Cohen, H. Rodríguez, H. Hutcheson
semanticscholar   +2 more sources

Two floral forms in the same species—distyly

Planta, 2023
This paper reviews the progress of research on the morphology, physiology and molecular biology of distyly in plants. It will help to elucidate the mysteries of distyly in plants. Distyly is a unique representative type of heterostyly in plants, primarily characterized by the presence of long style and short style within the flowers of the same species.
Luyong Zhang, Ping Li, Xiaoman Zhang, Jinfeng Li   +3 more
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Distyly in Neanotis indica (DC.) W.H. Lewis (Rubiaceae)

Ls- International Journal Of Life Sciences, 2021
Distyly in Neanotis indica (DC.) W.H. Lewis. (Rubiaceae) a distyous species with Pin eyed flowers (long style and inserted stamens in the corolla tube) and thrum eyed flowers with (exerted anthers and inserted style) accompanied by self-incompatibility in both floral forms but cross-compatibility is described for the first time.
Bir Bahadur
semanticscholar   +2 more sources

Distyly and pollen dimorphism in Damnacanthus (Rubiaceae)

Journal of Plant Research, 2003
We document distyly in Damnacanthus (Rubiaceae) and investigate pollen morphology in the genus. Within nine taxa in Japan (four species, four varieties and one form), five show distyly. Non-distylous taxa of Damnacanthus always have a long style and short stamens. We examined the pollen morphology of all taxa of Damnacanthus in Japan. The pollen grains
Akiyo, Naiki, Hidetoshi, Nagamasu
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The Maintenance and Breakdown of Distyly

The American Naturalist, 1979
In this paper we present a study of the equilibrium resulting from the balance between recombination and selection against the recombinant phenotypes. The model described in our previous paper, for the phenotypic effects of the character differences involved in heterostyly, is used as a basis for this study.
B. Charlesworth, D. Charlesworth
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A Model for the Evolution of Distyly

The American Naturalist, 1979
Reasons are given for believing that morphological distyly is unlikely to evolve before the incompatibility system. The first problem studied is therefore the evolution of incompatibility of the type found in distyly, with two pollen and two stigma types.
D. Charlesworth, B. Charlesworth
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Distyly in Polygonum jucundum Meisn. (Polygonaceae)

Plant Systematics and Evolution, 2010
Distyly has been clearly confirmed in Polygonum jucundum Meisn. The distylous species is dimorphic for tepals, styles, stigmas, and pollen size and number. Long (L)-morph flowers are slightly larger than short (S)-morph flowers. The stigma width of thrum flowers is larger than that of pin flowers, and pin stigmas have longer and fewer papillae than the
Ming-Lin Chen, Xiao-Ping Zhang
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The evolution of distyly in Primula vulgaris

Biological Journal of the Linnean Society, 1986
Experiments on pollen flow and seed production were performed in populations of P. vulgaris in order to examine the roles of selection for reduced self-pollination in a partially self-fertile morph, selection for reduced stigma clogging, selection for a pollen saving effect, and selection for disassortative pollination in the evolution of morphological
John Piper, Brian Charlesworth
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