Pollen Transfer
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. Gene transfer utilizing pollen-tubes of Albuca nelsonii and Tulbaghia violacea
Abstract Developing a tissue culture-independent genetic transformation system would be an interesting technique for gene transfer in valuable medicinal and horticultural plants. Efficient gene delivery (Agrobacterium tumefaciens strain LBA 4404: harbouring PBI121 plasmid) was achieved with Km-resistant pollen grains (pollen tube technique) and were found to
Crop Breed. Appl. Biotechnol.. Publicado em: 2017-09
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2. Identidad taxonómica de Diodia angustata (Rubiaceae) y su transferencia a Planaltina
Abstract As part of the studies carried out in the species of Diodia from the Americas, we present a discussion of the taxonomic identity of Diodia angustata. Based on the study of recent collections and original materials, we propose to transfer the species to the genus Planaltina, as P. angustata. A dichotomous key for all species of the genus is included.
Rodriguésia. Publicado em: 2016-12
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3. Transporte de pólen de espécies ornitófilas e energia disponível para beija-flores em área de Mata Atlântica, Núcleo Picinguaba/PESM, Ubatuba, SP / Pollen transport of p ornithophilous species and available energy for hummingbirds in an Atlantic Forest area, Núcleo Picinguaba/ PESM, Ubatuba, SP
O estudo das relações entre beija-flores e plantas, do fluxo polínico entre as espécies polinizadas e da área utilizada por estas aves é importante para melhor entendimento dos processos evolutivos que levaram a estas interações, além de fornecer subsídios para a conservação das espécies envolvidas. O presente estudo fornece informações sobre
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/01/2012
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4. Características vegetativas e reprodutivas das plantas e fatores abióticos do meio e suas relações com a alocação de biomassa floral e a seleção sexual em angiospermas / Vegetative and reproductive characteristics of plants and abiotic factors of the environment and their relations with floral biomass allocation and sexual selection in angiosperms
Plants are sessile organisms exposed to the effects of environmental stress. The flowers are fundamental structures in the evolution of angiosperms, because through them is sexual reproduction. For this, the flowers exhibit strategies that help the plant to achieve better reproductive success. Animals visit flowers in search of resources, however, to carry p
Publicado em: 2010
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5. Defensividade, higiene, produÃÃo de prÃpolis e mel com duas geraÃÃes de Apis mellifera / Defensividad, hygienic, production of honey and propolis in two generations of Apis mellifera
This research aims to quantify the production of propolis and honey, hygienic and defensive behavior, to estimate the correlation between them and their heritabilities in colonies of Apis mellifera. At the beginning of the experiment, 30 Langstroth model beehives were used, installed in apiaries located in different districts of the city of Marechal Candido
Publicado em: 2009
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6. Biologia da polinização e reprodução de especies de Melastomataceae do Parque Nacional da Serra da Canastra (MG) / Pollination and reproductive biology of Melastomataceae from Serra da Canastra National Park (MG, Brazil)
This study examines the reproductive phenology, pollination ecology, and mating systems of 10 species of Melastomataceae that occur in the Serra da Canastra National Park, Minas Gerais. Seasonality exposes plants to periodic changes in quality and abundance of resources. Flowers of many species can be found throughout the year, but there are well-defined pea
Publicado em: 2008
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7. Fenologia, polinização e reprodução de duas especies de Croton (Euphorbiaceae) em mata semidecidua
The phenology, pollination and mating systems of Croton floribundus and C. priscus (Euphorbiaceae) were studied in a semideciduous forest in Campinas, São Paulo, from 1993 to 1994. The species are pioneer monoecious trees, that bear bissexual racemose inflorescences, with unissexual and inconspicuous flowers. These species blossom in the wet season, from Oc
Publicado em: 1995
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8. A Lipid Transfer–like Protein Is Necessary for Lily Pollen Tube Adhesion to an in Vitro Stylar Matrix
Flowering plants possess specialized extracellular matrices in the female organs of the flower that support pollen tube growth and sperm cell transfer along the transmitting tract of the gynoecium. Transport of the pollen tube cell and the sperm cells involves a cell adhesion and migration event in species such as lily that possess a transmitting tract epide
American Society of Plant Physiologists.
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9. Going to great lengths: selection for long corolla tubes in an extremely specialized bat–flower mutualism
In a hypothesis that has remained controversial since its inception, Darwin suggested that long-tubed flowers and long-tongued pollinators evolved together in a coevolutionary race, with each selecting for increasing length in the other. Although the selective pressures that flowers impose on tongue length are relatively straightforward, in that longer tongu
The Royal Society.
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10. A Lily Stylar Pectin Is Necessary for Pollen Tube Adhesion to an in Vitro Stylar Matrix
Pollen tube cells adhere to the wall surface of the stylar transmitting tract epidermis in lily. This adhesion has been proposed as essential for the proper delivery of the sperm cells to the ovule. An in vitro adhesion bioassay has been used to isolate two stylar molecules required for lily pollen tube adhesion. The first molecule was determined to be a sma
American Society of Plant Physiologists.
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11. Use of Serial Analysis of Gene Expression Technology to Reveal Changes in Gene Expression in Arabidopsis Pollen Undergoing Cold Stress1[w]
We have characterized the global gene expression patterns of Arabidopsis pollen using Serial Analysis of Gene Expression (SAGE). A total of 21,237 SAGE tags were sequenced and 4,211 unique tags were identified. Interestingly, the number of unique tags in pollen was low compared with the SAGE library of the leaf constructed on a similar scale. The transcr
The American Society for Plant Biologists.
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12. Successive Glycosyltransfer Activity and Enzymatic Characterization of Pectic Polygalacturonate 4-α-Galacturonosyltransferase Solubilized from Pollen Tubes of Petunia axillaris Using Pyridylaminated Oligogalacturonates as Substrates
Polygalacturonate 4-α-galacturonosyltransferase (pectin synthase) was solubilized from pollen tubes of Petunia axillaris and characterized. To accomplish this, an assay method using fluorogenic pyridylaminated-oligogalacturonic acids (PA-OGAs) as acceptor substrates was developed. When the pollen tube enzyme was solubilized with 0.5% (v/v) Triton X-100 and
American Society of Plant Physiologists.