Symbiotic Germination
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Cyrtopodium paludicolum germination with two Tulasnella isolates
ABSTRACT Symbiosis between orchid seeds and mycorrhizal fungi has been reported to be a determining factor in the success of germination and protocorm development in vitro. The aim of this study was to isolate and identify by molecular analysis the mycorrhizal fungus associated with Cyrtopodium paludicolum, and to evaluate its efficiency in facilitating seed
Acta Bot. Bras.. Publicado em: 27/11/2017
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2. Rhizobial Inoculation, Alone or Coinoculated with Azospirillum brasilense, Promotes Growth of Wetland Rice
ABSTRACT Rhizobia and associative bacteria promote growth in rice plants (Oryza sativa L.) through a series of mechanisms, but most studies on inoculation have been performed based on inoculation with these bacteria in a separate or singular manner. The objective of this study was to assess the efficiency of single/isolated inoculation and inoculation combin
Rev. Bras. Ciênc. Solo. Publicado em: 24/10/2016
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3. Characterization of seed germination and protocorm development of Cyrtopodium glutiniferum (Orchidaceae) promoted by mycorrhizal fungi Epulorhiza spp.
Cyrtopodium glutiniferum is an endemic orchid of Brazil with potential medicinal and ornamental applications. As mycorrhizal fungi are essential for the initiation of the orchid life cycle, the aim of this study was to determine the strains of mycorrhizal fungi suitable for seed germination and protocorm development of C. glutiniferum and to characterize the
Acta Bot. Bras.. Publicado em: 2015-12
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4. The epiphytic orchids Ionopsis utricularioides and Psygmorchis pusilla associate with different Ceratobasidium lineages at Valle del Cauca, Colombia
In Orchidaceae, association with symbiotic fungi is required for seed germination and seedling development, thereby being the main energy source during the first steps of germination. Colombia is one of the countries with the greatest biodiversity of orchids, with an estimated 3,200 species, but few studies on orchid mycorrhiza have been conducted. In our st
Acta Bot. Bras.. Publicado em: 2015-03
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5. Symbiotic propagation of seedlings of Cyrtopodium glutiniferum Raddi (Orchidaceae)
In nature, orchid seeds obtain the nutrients necessary for germination by degrading intracellular fungal structures formed after colonization of the embryo by mycorrhizal fungi. Protocols for asymbiotic germination of orchid seeds typically use media with high concentrations of soluble carbohydrate and minerals. However, when reintroduced into the field, see
Acta Bot. Bras.. Publicado em: 2013-09
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6. Mycorrhizal diversity in Coppensia doniana (Orchidaceae) and phylogeny of mycorrhizal fungi associated with the Oncidiinae subtribe / Diversidade micorrízica em Coppensia doniana (Orchidaceae) e filogenia de fungos micorrízicos associados à subtribo Oncidiinae
In nature, orchids are fully dependent on mycorrhizal fungi for germination. These fungi can penetrate root cells and form pelotons, whose digestion provides simple sugars for the embryo. During the achlorophyllous seedling stage, orchids are obligatory dependent on the fungi, and some species remain so through life, while others become facultatively respons
Publicado em: 2010
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7. Fenologia, biologia floral e germinação in vitro de Cyrtopodium eugenii Rchb. f. &Warm. (Orchidaceae) / Fenology, floral biology and in vitro germination of Cyrtopodium eugenii Rchb.f. &Warm. (Orchidaceae)
Cyrtopodium eugenii Rchb. f. (Orchidaceae) is a specie widely distributed in Brazilian savannah, being the Planalto Central its main center of diversification. C. eugenii is a terrestrial specie, usually found in the Cerrado, growing in sand soil, dry environment and to the half shade. Due the beauty and exotic character of its flowers, C. eugenii present hi
Publicado em: 2009
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8. Formação de micorriza arbuscular e análise do transcritoma de raízes de cana-de-açúcar colonizadas por Glomus clarum na presença de herbicidas / Arbuscular mycorrhizal formation and transcriptome analyses of sugarcane roots colonized by Glomus clarum in the presence of herbicides
The arbuscular mycorrhizae (AM) are symbiotic root-fungus associations that play a key role in natural and agricultural ecosystems, through the enhancement of nutrients absorption in the soil and its transference into the plants. The AM may promote the growth of many plants, among them are the sugarcane. Even thought the herbicide utilized in the agriculture
Publicado em: 2006
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9. Heavy-Metal Stress and Developmental Patterns of Arbuscular Mycorrhizal Fungi
The rate of global deposition of Cd, Pb, and Zn has decreased over the past few decades, but heavy metals already in the soil may be mobilized by local and global changes in soil conditions and exert toxic effects on soil microorganisms. We examined in vitro effects of Cd, Pb, and Zn on critical life stages in metal-sensitive ecotypes of arbuscular mycorrhiz
American Society for Microbiology.
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10. Flavonoids Released Naturally from Alfalfa Promote Development of Symbiotic Glomus Spores In Vitro
Because flavonoids from legumes induce transcription of nodulation genes in symbiotic rhizobial bacteria, it is reasonable to test whether these compounds alter the development of vesicular-arbuscular mycorrhizal (VAM) fungi that infect those plants. Quercetin-3-O-galactoside, the dominant flavonoid released naturally from alfalfa (Medicago sativa L.) seeds,
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11. Characterization of the Lotus japonicus Symbiotic Mutant lot1 That Shows a Reduced Nodule Number and Distorted Trichomes1
We isolated a recessive symbiotic mutant of Lotus japonicus that defines a genetic locus, LOT1 (for low nodulation and trichome distortion). The nodule number per plant of the mutant was about one-fifth of that of the wild type. The lot1 mutant showed a moderate dwarf phenotype and distorted trichomes, but its root hairs showed no apparent differences to tho
American Society of Plant Biologists.
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12. Carbon Metabolism in Spores of the Arbuscular Mycorrhizal Fungus Glomus intraradices as Revealed by Nuclear Magnetic Resonance Spectroscopy1
Arbuscular mycorrhizal (AM) fungi are obligate symbionts that colonize the roots of over 80% of plants in all terrestrial environments. Understanding why AM fungi do not complete their life cycle under free-living conditions has significant implications for the management of one of the world's most important symbioses. We used 13C-labeled substrates and nucl
American Society of Plant Physiologists.