Relevant bibliographies by topics / Staminodes

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters

Academic literature on the topic 'Staminodes'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 June 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Staminodes.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Staminodes"

1

Sandvik, Sylvi M., and Ørjan Totland. "Quantitative importance of staminodes for female reproductive success in Parnassia palustris under contrasting environmental conditions." Canadian Journal of Botany 81, no. 1 (2003): 49–56. http://dx.doi.org/10.1139/b03-006.

Full text
Abstract:
The five sterile stamens, or staminodes, in Parnassia palustris act both as false and as true nectaries. They attract pollinators with their conspicuous, but non-rewarding tips, and also produce nectar at the base. We removed staminodes experimentally and compared pollinator visitation rate and duration and seed set in flowers with and without staminodes in two different populations. We also examined the relative importance of the staminode size to other plant traits. Finally, we bagged, emasculated, and supplementary cross-pollinated flowers to determine the pollination strategy and whether reproduction was limited by pollen availability. Flowers in both populations were highly dependent on pollinator visitation for maximum seed set. In one population pollinators primarily cross-pollinated flowers, whereas in the other the pollinators facilitated self-pollination. The staminodes caused increased pollinator visitation rate and duration to flowers in both populations. The staminodes increased female reproductive success, but only when pollen availability constrained female reproduction. Simple linear regression indicated a strong selection on staminode size, multiple regression suggested that selection on staminode size was mainly caused by correlation with other traits that affected female fitness.Key words: staminodes, insect activity, seed set, spatial variation, Parnassia palustris.
APA, Harvard, Vancouver, ISO, and other styles
2

Meaders, Clara, Ya Min, Katherine J. Freedberg, and Elena Kramer. "Developmental and molecular characterization of novel staminodes in Aquilegia." Annals of Botany 126, no. 2 (2020): 231–43. http://dx.doi.org/10.1093/aob/mcaa029.

Full text
Abstract:
Abstract Background and Aims The ranunculid model system Aquilegia is notable for the presence of a fifth type of floral organ, the staminode, which appears to be the result of sterilization and modification of the two innermost whorls of stamens. Previous studies have found that the genetic basis for the identity of this new organ is the result of sub- and neofunctionalization of floral organ identity gene paralogues; however, we do not know the extent of developmental and molecular divergence between stamens and staminodes. Methods We used histological techniques to describe the development of the Aquilegia coerulea ‘Origami’ staminode relative to the stamen filament. These results have been compared with four other Aquilegia species and the closely related genera Urophysa and Semiaquilegia. As a complement, RNA sequencing has been conducted at two developmental stages to investigate the molecular divergence of the stamen filaments and staminodes in A. coerulea ‘Origami’. Key Results Our developmental study has revealed novel features of staminode development, most notably a physical interaction along the lateral margin of adjacent organs that appears to mediate their adhesion. In addition, patterns of abaxial/adaxial differentiation are observed in staminodes but not stamen filaments, including asymmetric lignification of the adaxial epidermis in the staminodes. The comparative transcriptomics are consistent with the observed lignification of staminodes and indicate that stamen filaments are radialized due to overexpression of adaxial identity, while the staminodes are expanded due to the balanced presence of abaxial identity. Conclusions These findings suggest a model in which the novel staminode identity programme interacts with the abaxial/adaxial identity pathways to produce two whorls of laterally expanded organs that are highly differentiated along their abaxial/adaxial axis. While the ecological function of Aquilegia staminodes remains to be determined, these data are consistent with a role in protecting the early carpels from herbivory and/or pathogens.
APA, Harvard, Vancouver, ISO, and other styles
3

Wang, Menglin, Shuyin Huang, Manru Li, Doyle McKey, and Ling Zhang. "Staminodes influence pollen removal and deposition rates in nectar-rewarding self-incompatible Phanera yunnanensis (Caesalpinioideae)." Journal of Tropical Ecology 35, no. 1 (2019): 34–42. http://dx.doi.org/10.1017/s0266467418000433.

Full text
Abstract:
AbstractStaminodes are sterile stamens that produce no pollen, exhibit diverse structures and perform various functions. Flowers of Phanera yunnanensis possess three fertile stamens with large anthers and long filaments, and seven staminodes with tiny anthers and short filaments. To investigate the adaptive significance of staminodes in this species, we studied effects of staminode removal on pollen removal and deposition, flower visitation rate and fruit set in Xishuangbanna, south-western China. Four species of nectar-foraging pollinators visited flowers, mostly Amegilla zonata and Apis cerana (2.80 ± 0.15 and 1.76 ± 0.41 visits h−1 per flower, respectively). Staminode removal did not affect fruit set, but increased visitation by A. cerana by 2.6-fold, reduced visitation by A. zonata by 68% and increased the pollen removal rate for both pollinators (all effects were significant). Staminode removal significantly reduced pollen deposition rate for A. zonata, but not for A. cerana. These results suggest that the staminodes of P. yunnanensis filter which insects act as pollinators and affect pollen removal and deposition rates. By reducing pollen removal rates, staminodes may implement a pollen-dispensing schedule that spreads pollen dispersal from individual flowers over multiple pollinators. By altering pollen deposition rates, staminodes may influence reproductive fitness in other ways.
APA, Harvard, Vancouver, ISO, and other styles
4

Frimpong-Anin, Kofi, Michael K. Adjaloo, Peter K. Kwapong, and William Oduro. "Structure and Stability of Cocoa Flowers and Their Response to Pollination." Journal of Botany 2014 (March 2, 2014): 1–6. http://dx.doi.org/10.1155/2014/513623.

Full text
Abstract:
This study investigated the position of staminodes around the style of cocoa flowers and the stability of cocoa flowers relative to pollination and seasonality. Cocoa flowers were categorized into converging, ≤1.20 mm; parallel, 1.21–2.40 mm, and splay ≥2.41 mm, depending on the distance between the staminode and style. Some flowers were hand pollinated while others were not and were excluded from insect visitors. Proportions of flowers of converging (56.0%), parallel (37.5%), and splay (6.5%) remained similar along the vertical plane of cocoa trees. Although pollination rates of flowers with splay staminodes were the lowest, the overall pollination success of cocoa trees was not significantly affected because of the small proportion of splay flowers.The stability of the cocoa flowers depended on both the season and pollination. During the dry season, unpollinated flowers of cocoa trees showed a flower-stability ratio of 72% on the second day, while the flower-stability ratio was 94% in the wet season. Pollinated (senescent) flowers had a stability ratio of 95% after 5 days during the wet season, but all pollinated flowers dropped after 5 days in the dry season, indicating that seasonal factors, such as water stress, can have dramatic effects on cocoa yields.
APA, Harvard, Vancouver, ISO, and other styles
5

GUSTAFSSON, MATS H. G., and FINN BORCHSENIUS. "Clusia nubium (Clusiaceae): a new species from cloud-forests of southwestern Ecuador." Phytotaxa 253, no. 3 (2016): 219. http://dx.doi.org/10.11646/phytotaxa.253.3.6.

Full text
Abstract:
Clusia nubium from southwestern Ecuador is described as a species new to science. It grows as a hemiepiphyte in lower montane cloud forest. The species belongs to Clusia sect. Retinostemon, a largely Andean group characterized by male flowers with a resin-secreting synandrium of completely fused stamens and sometimes also anthers and staminodes. It differs from all other species in that section by the combination of creamy-white petals; male flowers with a dome-shaped synandrium with numerous fused stamens surrounding a group of resin secreting staminodia; and large fruits with 9–15 peltate stigmata forming a ring.
APA, Harvard, Vancouver, ISO, and other styles
6

Decraene, L. P. Ronse, and E. F. Smets. "Staminodes: Their morphological and evolutionary significance." Botanical Review 67, no. 3 (2001): 351–402. http://dx.doi.org/10.1007/bf02858099.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

QUEIROZ-LIMA, ADRIANA, ANDRÉ M. AMORIM, and DOMINGOS B. O. S. CARDOSO. "A new species of Sauvagesia (Ochnaceae) from the northern Espinhaço Range, Brazil, and an emended description of Sauvagesia paganuccii." Phytotaxa 316, no. 1 (2017): 59. http://dx.doi.org/10.11646/phytotaxa.316.1.5.

Full text
Abstract:
The new species Sauvagesia insolita (Ochnaceae) is described and illustrated from campo rupestre vegetation of Sete Passagens State Park, in the northeastern most portion of the Espinhaço Range in Bahia, Brazil. Sauvagesia insolita is morphologically similar to the recently described S. paganuccii, for which we also provide an emended description. These species share an unusual floral polymorphism, where some flowers of the same individual bear free, filamentous staminodes external to the corona-like fused staminodal whorl, which is a feature newly reported for Salvagesia subsect. Vellozianae. They differ mainly by the shape and size of the leaves and the number of flowers per inflorescence.
APA, Harvard, Vancouver, ISO, and other styles
8

Traore, Abdoulaye, and Mark J. Guiltinan. "Effects of Carbon Source and Explant Type on Somatic Embryogenesis of Four Cacao Genotypes." HortScience 41, no. 3 (2006): 753–58. http://dx.doi.org/10.21273/hortsci.41.3.753.

Full text
Abstract:
The effects of five carbon sources (glucose, fructose, maltose, sorbitol, and sucrose) and two explant types (petals and staminodes) on cacao somatic embryogenesis was studied. No growth was observed on both types of explants cultured on sorbitol containing media and slow growth was obtained on media supplemented with maltose. Depending on the genotype, the percentage of explants producing one or more embryos ranged from 6% to 99%, 18% to 98%, and 3% to 82% on media containing glucose, fructose and sucrose respectively. Explants cultured continuously on maltose or sorbitol-containing media failed to produce embryos. Staminode explants produced 3 to 10 times more somatic embryos than petals. A strong genotypic effect on somatic embryogenesis was observed. Staminode explants of the Forastero clones Laranja and PSUSca 6 produced 2 to 30 times more somatic embryos than the Trinitarios UF 613 and ICS 16. During embryo maturation and conversion, no significant differences were observed among glucose, fructose, maltose, or sucrose for embryo weight, total shoot and root production. However, we found that all plantlets produced on glucose had shoots with normal cacao leaves while the other carbon sources sometimes produced plantlets with cotyledon-like leaves.
APA, Harvard, Vancouver, ISO, and other styles
9

Appleton, Andrea D., and John J. Schenk. "Evolution and Development of Staminodes in Paronychia (Caryophyllaceae)." International Journal of Plant Sciences 182, no. 5 (2021): 377–88. http://dx.doi.org/10.1086/713918.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Nicholls, Emony I. E., and Marcel E. Dorken. "Sex-ratio variation and the function of staminodes in Aralia nudicaulis1This article is part of a Special Issue entitled “Pollination biology research in Canada: Perspectives on a mutualism at different scales”." Botany 90, no. 7 (2012): 575–85. http://dx.doi.org/10.1139/b2012-016.

Full text
Abstract:
Aralia nudicaulis L. is a clonal dioecious herb common to forested ecosystems in eastern North America. Across 15 sites, the frequency of female ramets ranged between 5% and 95%. This variation was used to examine hypotheses involving the life history and pollination biology of A. nudicaulis. Because female reproductive function is thought to incur greater resource costs than male function, we predicted that female ramets should (i) be more common where resources (and light in particular) are more abundant and (ii) have lower rates of survival than male ramets. However, there was (i) no significant association between light availability (measured as canopy closure) and female frequencies across sites and (ii) ramet ages were skewed towards older ages for females, not males. Female A. nudicaulis produce staminodes that render female inflorescences visually similar to male inflorescences. We experimentally manipulated the presence–absence of staminodes and found that pollen receipt by females without staminodes was substantially lower than for plants with intact staminodes. Finally, pollinators tend to prefer visiting male over female flowers. We were interested in evaluating whether such preferences might scale up to the population level, with higher pollinator abundances at male-dominated sites. However, we instead found a strong positive association between pollinator abundances and female frequencies. Although there is unlikely to be a causal relationship between them, the identification of a common variable underlying variation in female frequencies and pollinator abundances might reveal key insights into the factors regulating the life history and pollination of forest understory plants.
APA, Harvard, Vancouver, ISO, and other styles

Dissertations / Theses on the topic "Staminodes"

1

Walker-Larsen, Jennifer. "The functional significance of staminodes, with special reference to Penstemon (Scrophulariaceae)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ31377.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Paula, Orlando Cavalari de [UNESP]. "Morfologia e desenvolvimento floral em Croton L. e Astraea Klotzsch (Euphorbiaceae sensu stricto)." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/100664.

Full text
Abstract:
Made available in DSpace on 2014-06-11T19:30:58Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-06-28Bitstream added on 2014-06-13T21:01:48Z : No. of bitstreams: 1 paula_oc_dr_rcla.pdf: 2531374 bytes, checksum: a92e198da4df4bf433952e2e684de112 (MD5)<br>Croton agrupa cerca de 1.200 espécies portadoras de flores bissexuais e representa um grupo complexo, sob o ponto de vista taxonômico e morfológico. Astraea, recentemente separada de Croton e com quem divide inúmeras características morfológicas, é um gênero pouco estudado. A natureza dos verticilos florais, especialmente nectários e estruturas filamentosas das flores pistiladas, é um assunto bastante controvertido, nos dois gêneros. Estudos com as flores de Croton mostram o desenvolvimento do óvulo e da semente e outros apenas descrevem a morfologia do grão de pólen maduro. Entretanto, para o gênero Astraea nada se conhece até o momento. Analisando o desenvolvimento, a vascularização e a morfologia de flores estaminadas e pistiladas, de Croton e Astraea, verificou-se que as estruturas filamentosas das flores pistiladas correspondem às pétalas presentes nas flores estaminadas, e que os nectários representam estames transformados; observou-se, inclusive, que flores pistiladas podem desenvolver estames em substituição aos nectários. Também foi possível apontar caracteres que apóiem a segregação de Astraea e Croton, embora os dois gêneros compartilhem inúmeras características morfológicas. O estudo do desenvolvimento da antera e óvulo de duas espécies de Astraea e de sete de Croton mostrou a ocorrência de cristais estilóides, no tapete, e de idioblastos portadores de drusa, no endotécio; mostrou também, a presença de óvulos com os dois tegumentos de origem epidérmica e a diferenciação de megásporo funcional em posição micropilar. Esses aspectos, descritos pela primeira vez para a família, precisam ser melhor investigados a fim de se determinar sua ocorrência e distribuição, dentro do grupo, e avaliar melhor seu potencial taxonômico.<br>Croton comprises approximately 1,200 species with bisexual flowers and is a taxonomically and morphologically complex group. Astraea, which was recently separated from Croton and shares innumerous morphological characteristics, is still a poorly studied genus. The nature of the floral whorls, especially the nectaries and the filamentous structures of the pistillate flowers, is a controversial subject in both genera. Some studies with Croton flowers have examined the development of ovules and seeds, while others have only described the morphology of mature pollen grains. Very little is currently known about Astraea. Analyses of the development, vascularization, and morphology of the staminate and pistillate flowers of Croton and Astraea demonstrated that the filamentous structures of the pistillate flowers represent transformed petals, and that nectaries represent transformed stamens in pistillate flowers; stamens were occasionally observed in place of nectaries. Many characteristics were observed that support the segregation of Astraea from Croton, although the two genera do share numerous morphological features. An examination of the development of the anthers and ovules of two species of Astraea and seven species of Croton demonstrated the presence of styloid crystals in the tapetum as well as idioblasts with druses in the endothecia; ovules with two teguments of epidermal origin and the differentiation of a functional megaspore in a micropylar position were also observed. These aspects, described here for the first time for the family, need to be further investigated to determine their occurrence and distribution within the taxon, and to evaluate their taxonomic potential.
APA, Harvard, Vancouver, ISO, and other styles
3

Paula, Orlando Cavalari de. "Morfologia e desenvolvimento floral em Croton L. e Astraea Klotzsch (Euphorbiaceae sensu stricto) /." Rio Claro : [s.n.], 2010. http://hdl.handle.net/11449/100664.

Full text
Abstract:
Resumo: Croton agrupa cerca de 1.200 espécies portadoras de flores bissexuais e representa um grupo complexo, sob o ponto de vista taxonômico e morfológico. Astraea, recentemente separada de Croton e com quem divide inúmeras características morfológicas, é um gênero pouco estudado. A natureza dos verticilos florais, especialmente nectários e estruturas filamentosas das flores pistiladas, é um assunto bastante controvertido, nos dois gêneros. Estudos com as flores de Croton mostram o desenvolvimento do óvulo e da semente e outros apenas descrevem a morfologia do grão de pólen maduro. Entretanto, para o gênero Astraea nada se conhece até o momento. Analisando o desenvolvimento, a vascularização e a morfologia de flores estaminadas e pistiladas, de Croton e Astraea, verificou-se que as estruturas filamentosas das flores pistiladas correspondem às pétalas presentes nas flores estaminadas, e que os nectários representam estames transformados; observou-se, inclusive, que flores pistiladas podem desenvolver estames em substituição aos nectários. Também foi possível apontar caracteres que apóiem a segregação de Astraea e Croton, embora os dois gêneros compartilhem inúmeras características morfológicas. O estudo do desenvolvimento da antera e óvulo de duas espécies de Astraea e de sete de Croton mostrou a ocorrência de cristais estilóides, no tapete, e de idioblastos portadores de drusa, no endotécio; mostrou também, a presença de óvulos com os dois tegumentos de origem epidérmica e a diferenciação de megásporo funcional em posição micropilar. Esses aspectos, descritos pela primeira vez para a família, precisam ser melhor investigados a fim de se determinar sua ocorrência e distribuição, dentro do grupo, e avaliar melhor seu potencial taxonômico.<br>Abstract: Croton comprises approximately 1,200 species with bisexual flowers and is a taxonomically and morphologically complex group. Astraea, which was recently separated from Croton and shares innumerous morphological characteristics, is still a poorly studied genus. The nature of the floral whorls, especially the nectaries and the filamentous structures of the pistillate flowers, is a controversial subject in both genera. Some studies with Croton flowers have examined the development of ovules and seeds, while others have only described the morphology of mature pollen grains. Very little is currently known about Astraea. Analyses of the development, vascularization, and morphology of the staminate and pistillate flowers of Croton and Astraea demonstrated that the filamentous structures of the pistillate flowers represent transformed petals, and that nectaries represent transformed stamens in pistillate flowers; stamens were occasionally observed in place of nectaries. Many characteristics were observed that support the segregation of Astraea from Croton, although the two genera do share numerous morphological features. An examination of the development of the anthers and ovules of two species of Astraea and seven species of Croton demonstrated the presence of styloid crystals in the tapetum as well as idioblasts with druses in the endothecia; ovules with two teguments of epidermal origin and the differentiation of a functional megaspore in a micropylar position were also observed. These aspects, described here for the first time for the family, need to be further investigated to determine their occurrence and distribution within the taxon, and to evaluate their taxonomic potential.<br>Orientador: Maria das Graças Sajo<br>Coorientador: Inês Cordeiro<br>Banca: Adelita Aparecida Sartori Paoli<br>Banca: Denise Maria Trombert Oliveira<br>Banca: Silvia Rodrigues Machado<br>Banca: Lygia Dolores Ribeiro de Santiago Fernandes<br>Doutor
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Staminodes"

1

"Staminode(s)." In Encyclopedia of Genetics, Genomics, Proteomics and Informatics. Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6754-9_16114.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

"longitudinally dissected. f. Staminode and two stamens in staminate flower. g. Pistillate flower longitudinally dissected, h and i. Floral diagram of staminate and pistillate flowers, respectively. j. Fruiting branch, st.=staminode. Drawn by Priscilla Fawcett. From Correll and Correll 1982." In Florida Ethnobotany. CRC Press, 2004. http://dx.doi.org/10.1201/9780203491881-43.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

"Cassytha filiformis. a. Stem parasitizing another plant, b. Stem on host with haustoria. c. Detail of branching, d. Inflorescence, e. Flower in first (or female) stage, f. Longitudinal section of first stage, g. Flower in second (or male) stage, h. Longitudinal section of second stage, i. Staminodal nectary. j. Stamen and nectaries, k. Stamen before dehiscence. 1. Stamen dehisced, m. Floral diagram, n. Fruit. Drawn by Priscilla Fawcett. Correll and Correll 1982." In Florida Ethnobotany. CRC Press, 2004. http://dx.doi.org/10.1201/9780203491881-36.

Full text
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography