Results 201 to 210 of about 6,574,819 (220)
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Late-acting self-incompatibility in angiosperms
Botanical Review, The, 1986In most self-incompatible (SI) plants, pollen tube growth in self-pollinated flowers is inhibited on the stigma or in the style. SI systems that operate in the ovary have been assumed to be extremely rare. Evidence from many plant species is presented to show that the SI barriers in the ovary, described here as late-acting SI systems, are quite common.
Kamaljit S. Bawa
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Floral morphology and late-acting self-incompatibility inApocynum cannabinum (Apocynaceae)
Plant Systematics and Evolution, 1999Scanning electron and fluorescence microscopy were used to clarify some aspects of the floral morphology ofApocynum cannabinum. Insects are required for pollination, since the floral morphology prevents autogamy and minimizes intrafloral self-pollination. Flowers hand-pollinated with self-pollen never set fruit, but 10.6% of cross-pollinations produced
Robert Wyatt, Sara R Lipow
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Late-acting self-incompatibility: a barrier to self-fertilization in sunnhemp (Crotalaria juncea L.)
Euphytica, 2018In search of causal factors underlying perceived allogamy in sunnhemp (Crotalaria juncea L.), we investigated the breeding system and pollen–pistil interaction. Floral biology study in the species established Fabaceae type hermaphrodite zygomorphic flower with dimorphic anthers.
Jiban Mitra +2 more
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Ovarian and other late-acting self-incompatibility systems
1994In a recent review of self-incompatibility (SI) in flowering plants, Dickinson (1990) noted that ‘SI in angiosperms is probably the best defined cellular communication system in the plant kingdom. Its genetic basis is now well established, the cells involved are clearly identifiable, the time of interaction is known, and the consequences of the ...
Tammy L. Sage +2 more
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First evidence of late‐acting self‐incompatibility in the Aristolochiaceae
Plant BiologyAbstract Most Aristolochiaceae species studied so far are from temperate regions, bearing self‐compatible protogynous trap flowers. Although self‐incompatibility has been suggested for tropical species, the causes of self‐sterility in this family remain unknown.
C. A. Matallana‐Puerto +5 more
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Late‐Acting Self‐Incompatibility inIpomopsis tenuifolia(Gray) V. Grant (Polemoniaceae)
International Journal of Plant Sciences, 2006Several different self‐incompatibility (SI) syndromes have been previously reported from Polemoniaceae, including differences in genetic control, timing of the response, and the location of pollen tube inhibition. In order to examine the evolutionary linkage between genetic control and site of pollen tube inhibition, crossing experiments and ...
Tasha LaDoux, Elizabeth A. Friar
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Plant Biology, 2016
Abstract Mixed cross and self‐pollen load on the stigma (mixed pollination) of species with late‐acting self‐incompatibility system (LSI) can lead to self‐fertilized seed production. This “cryptic self‐fertility” may allow selfed seedling development in species otherwise largely self‐sterile. Our aims were to check if mixed pollinations would lead to
M. O. Duarte +4 more
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Abstract Mixed cross and self‐pollen load on the stigma (mixed pollination) of species with late‐acting self‐incompatibility system (LSI) can lead to self‐fertilized seed production. This “cryptic self‐fertility” may allow selfed seedling development in species otherwise largely self‐sterile. Our aims were to check if mixed pollinations would lead to
M. O. Duarte +4 more
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Botanica Acta, 1993
AbstractThe neotropical trees Chorisia chodatii, C. speciosa, Tabebuia caraiba and T. ochracea show late‐acting self‐incompatibility. Accumulated ovule penetrations following self‐pollinations were similar to those in crosses. During the six to eight day period following pollination, in both selfed and crossed ovules, a resting zygote with initial ...
P. E. Gibbs, Marta Bianchi
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AbstractThe neotropical trees Chorisia chodatii, C. speciosa, Tabebuia caraiba and T. ochracea show late‐acting self‐incompatibility. Accumulated ovule penetrations following self‐pollinations were similar to those in crosses. During the six to eight day period following pollination, in both selfed and crossed ovules, a resting zygote with initial ...
P. E. Gibbs, Marta Bianchi
openaire +1 more source