Pollen Only Flowers
Mostrando 1-12 de 60 artigos, teses e dissertações.
-
1. Aspects of the reproductive biology of Zingiber spectabile (Zingiberaceae)
ABSTRACT Ginger (Zingiber spectabile) is cultivated worldwide as a floriculture and landscaping species. Studies on the biology and floral morphology of this species are important for its improvement; however, they are scarce. We investigated the reproductive biology and floral morphology of gingers grown in a germplasm bank. Floral development was monitored
Rev. Ceres. Publicado em: 2021-04
-
2. Flowering and pollination ecology of Cleistocactus baumannii (Cactaceae) in the Brazilian Chaco: pollinator dependence and floral larceny
ABSTRACT Cleistocactus baumannii is the only ornithophilous cactus species in the Brazilian Chaco. In addition, this species of Cactaceae invests heavily in flowering in the ecoregion. Such characteristics motivated us to evaluate the temporal availability of flowers in the context of its floral visitors. The reproductive system of C. baumannii, the number o
Acta Bot. Bras.. Publicado em: 2020-03
-
3. Phoretic mites (Rhinoseius spp.) in Apodiformes from Cerrado and Pantanal Biomes in midwestern Brazil
Resumo Os ácaros nasais são comumente encontrados em beija-flores (Apodiformes). Na maioria dos casos, os ácaros foram relatados como endoparasitas, parasitando o sistema respiratório, particularmente as câmaras nasais anteriores, a laringe, a traqueia, os pulmões e os sacos aéreos e conjuntivais. No entanto, alguns ácaros são transportados apenas p
Braz. J. Biol.. Publicado em: 09/12/2019
-
4. Special offer while stocks last: high-energy pulse of nectar caused by a massive post-fire flowering of Sinningia elatior (Gesneriaceae) in an area of Cerrado and implications for its pollination
Resumo A intensa floração pós-fogo de Sinningia elatior (Gesneriaceae) foi estudada em uma área de Cerrado. Para estudar o sistema reprodutivo, testes de polinização foram realizados no campo. Espécimes de S. elatior foram encontrados isolados ou agrupados na área de estudo, as flores são tubulares, alaranjadas/avermelhadas e desprovidas de odor. Ap
Rodriguésia. Publicado em: 03/10/2019
-
5. Meiotic Behavior and Pollen Viability of Spondias mombin L.: Native Fruit Species of the Amazon
ABSTRACT Spondias mombin L. is a fruit species native to the Amazon with great marketing potential. The aim of this study was to examine the meiotic behavior and pollen viability of S. mombin. Flower buds at various developmental stages were collected for analyses of pollen viability, in vitro germination, and meiotic behavior. S. mombin is diploid with 2n =
Floresta Ambient.. Publicado em: 15/07/2019
-
6. Trade off between quantity and size of pollen grains in the heterandrous flowers of Senna pendula (Fabaceae)
ABSTRACT Heteranthery, the presence of different types of stamens in a flower, may reduce the conflict between pollinators and plants by ensuring the resource for the pollinator without drastically affecting the availability of viable male gametes for fertilization, according to the division-of-labor hypothesis. We investigated whether the poricidal anthers
Acta Bot. Bras.. Publicado em: 30/07/2018
-
7. Pollination biology of melittophilous legume tree species in the Atlantic Forest in Southeast Brazil
ABSTRACT This study describes the floral phenology and morphology, reproductive biology and pollinators for eight legume tree species, Schizolobium parahyba, Senna macranthera, and Senna multijuga (Caesalpinioideae), as well as Andira fraxinifolia, Lonchocarpus cultratus, Pterocarpus violaceus, Swartzia oblata, and S. simplex (Papilionoideae), in the Atlanti
Acta Bot. Bras.. Publicado em: 02/07/2018
-
8. ‘URS Campestre’ seedless orange: a new mutant with female sterility
ABSTRACT: Seedlessness in fruit is a trait that is much sought after by juice making industries. Close to the city of São Sebastião do Caí, in the state of Rio Grande do Sul (RS), Brazil, a new mutant orange originating from natural mutation was identified and selected as a seedless material. To determine the mechanisms involved in the absence of seeds, t
Sci. agric. (Piracicaba, Braz.). Publicado em: 2017-10
-
9. Corona development and floral nectaries of Asclepiadeae (Asclepiadoideae, Apocynaceae)
ABSTRACT Flowers of Asclepiadoideae are notable for possessing numerous nectaries and elaborate coronas, where nectar can accumulate but is not necessarily produced. Given the complexity and importance of these structures for reproduction, this study aimed to analyze the ontogeny of the corona, the structure and position of nectaries and the histochemistry o
Acta Bot. Bras.. Publicado em: 2017-09
-
10. Trichomes that secrete substances of a mixed nature in the vegetative and reproductive organs of some species of Moraceae
ABSTRACT This study aimed to obtain new information about the distribution, morphology and content of secretory trichomes present in the vegetative and reproductive organs of four species of Moraceae: Artocarpus heterophyllus, Dorstenia cayapia, Maclura tinctoria and Sorocea bonplandii. Stem, leaf, flower and inflorescence samples were processed for scanning
Acta Bot. Bras.. Publicado em: 31/01/2017
-
11. Starch distribution in anthers, microspores and pollen grains in Aechmea recurvata (Klotzsch.) L.B.Sm., Dyckia racinae L.B.Sm. and Tillandsia aeranthos (Loisel.) L.B.Sm. (Bromeliaceae)
This paper presents a comparative description of the starch distribution in the anthers, microspores and pollen grains of Aechmea recurvata, Dyckia racinae and Tillandsia aeranthos. Flowers at different stages of development were processed according to plant microtechniques for observation by light microscope. Ten stages of embryological development were use
Acta Bot. Bras.. Publicado em: 2015-03
-
12. Comparative pollination role of stamens and breeding system in three species of Commelina (Commelinaceae) in Ile-Ife, Nigeria
This study investigated pollination mechanisms and breeding systems in five Commelina variants: two subspecies of Commelina diffusa (C. diffusa subsp. aquatica and C. diffusa subsp. montana, each having two staminodes); two variants of C. erecta (with three staminodes); and C. lagosensis (also with three staminodes). In all three species, the staminodes have
Acta Bot. Bras.. Publicado em: 2013-09