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Brocchinioideae
''Brocchinia'' is a genus of the botanical family Bromeliaceae, and is the sole genus of the subfamily Brocchinioideae, containing 20 species. The genus is named for Giovanni Battista Brocchi, Italian naturalist (1772–1826). ''Brocchinia'' species are native primarily to the ancient Guayana Shield in southern Venezuela and Guyana, with some species extending into Colombia and northern Brazil. Its species are generally restricted to areas of sand and sandstone of the Roraima Formation; a few occur on granite.Givnish TJ, Burkhardt EL, Happel RE, Weintraub JW. 1985. Carnivory in the bromeliad ''Brocchinia reducta'', with a cost/benefit model for the general restriction of carnivorous plants to sunny, moist, nutrient-poor habitats. ''American Naturalist'' 124: 479-497. Based on chloroplast DNA sequence variation, ''Brocchinia'' appears to be sister to all other bromeliads.Givnish TJ, Millam KC, Berry PE, Sytsma KJ. 2007. Phylogeny, adaptive radiation, and historical biogeograph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bromeliaceae
The Bromeliaceae (the bromeliads) are a family of monocot Monocotyledons (), commonly referred to as monocots, (Lilianae ''sensu'' Chase & Reveal) are grass and grass-like flowering plants (angiosperms), the seeds of which typically contain only one Embryo#Plant embryos, embryonic leaf, or cotyledon. Th ... flowering plants of about 80 genera and 3700 known species, native mainly to the Tropics, tropical Americas, with several species found in the American subtropics and one in tropical west Africa, ''Pitcairnia feliciana''. It is among the basal (phylogenetics), basal families within the Poales and is the only family within the order that has Septal nectary, septal nectaries and Ovary (plants), inferior ovaries.Judd, Walter S. Plant systematics a phylogenetic approach. 3rd ed. Sunderland, MA: Sinauer Associates, Inc., 2007. These Ovary (plants), inferior ovaries characterize the Bromelioideae, a subfamily of the Bromeliaceae. The family includes both epiphytes, such as Spanis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pitcairnioideae
Pitcairnioideae is a subfamily of the bromeliad family, Bromeliaceae. Traditionally, it was a large subfamily, comprising all those species with winged or more rarely naked seeds. Molecular phylogenetic studies showed that traditional Pitcairnioideae was not monophyletic, and the subfamily was more narrowly circumscribed. , the Encyclopaedia of Bromeliads placed five genera in the subfamily. Members of the subfamily are found from the Andes to the coast of Brazil, with one genus (''Fosterella'') found northwards to Mexico. Description Species in the subfamily Pitcairnioideae have fruits in the form of capsules with winged seeds. The petals are not joined together when the flowers open, and are usually large and conspicuous. Taxonomy Traditionally, the family Bromeliaceae was divided into three subfamilies based on the structure of the seeds and fruit, with Pitcairnioideae comprising all those with winged or rarely naked seeds. The other subfamilies were Bromelioideae and Tillands ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brocchinia Micrantha
''Brocchinia micrantha'' is a species of plant in the genus ''Brocchinia''. This species is native to Venezuela and Guyana. In Guyana, this plant is commonly found in the Kaieteur National Park Kaieteur National Park is a national park located in the Potaro-Siparuni Region of Guyana. The Park's boundaries and purpose are defined in the Kaieteur National Park Act, and was created to preserve the natural scenery (including Kaieteur Falls) .... Additionally, this plant serves as a resource and a habitat for a variety of organisms, including the golden rocket frog. References micrantha Flora of Venezuela Flora of Guyana Plants described in 1880 Taxa named by John Gilbert Baker Taxa named by Carl Christian Mez {{Bromeliad-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Navioideae
Navioideae is a subfamily of the bromeliad family, Bromeliaceae. It contains four or five genera, formerly placed in a more broadly defined subfamily Pitcairnioideae. Genera , the Encyclopaedia of Bromeliads accepted five genera, while Plants of the World Online accepted four. *''Brewcaria'' L.B.Sm., Steyerm. & H.Rob. (may be included in ''Navia'') *''Cottendorfia'' Schult.f. *'' Navia'' Schult. & Schult.f. *''Sequencia'' (L.B.Sm.) Givnish *''Steyerbromelia ''Steyerbromelia'' (named after Julian A. Steyermark, an American plant collector, author, and editor) is a genus of plants in the family Bromeliaceae, subfamily Navioideae. All the known species in the genus are endemic to southern Venezuela ...'' L.B.Sm. References Commelinid subfamilies {{Bromeliaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterocystous Cyanobacteria
Heterocysts or heterocytes are specialized nitrogen-fixing cells formed during nitrogen starvation by some filamentous cyanobacteria, such as ''Nostoc punctiforme'', ''Cylindrospermum stagnale'', and ''Anabaena sphaerica''. They fix nitrogen from dinitrogen (N2) in the air using the enzyme nitrogenase, in order to provide the cells in the filament with nitrogen for biosynthesis. Nitrogenase is inactivated by oxygen, so the heterocyst must create a microanaerobic environment. The heterocysts' unique structure and physiology require a global change in gene expression. For example, heterocysts: * produce three additional cell walls, including one of glycolipid that forms a hydrophobic barrier to oxygen * produce nitrogenase and other proteins involved in nitrogen fixation * degrade photosystem II, which produces oxygen * up-regulate glycolytic enzymes * produce proteins that scavenge any remaining oxygen * contain polar plugs composed of cyanophycin which slows down cell-to-cell di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brocchinia Tatei
''Brocchinia tatei'' is a species of plant in the genus ''Brocchinia''. This species is native to Venezuela and Guyana Guyana ( or ), officially the Cooperative Republic of Guyana, is a country on the northern mainland of South America. Guyana is an indigenous word which means "Land of Many Waters". The capital city is Georgetown. Guyana is bordered by the .... References tatei Flora of Venezuela Flora of Guyana Guayana Highlands Plants described in 1946 Epiphytes {{Bromeliad-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epiphyte
An epiphyte is an organism that grows on the surface of a plant and derives its moisture and nutrients from the air, rain, water (in marine environments) or from debris accumulating around it. The plants on which epiphytes grow are called phorophytes. Epiphytes take part in nutrient cycles and add to both the diversity and biomass of the ecosystem in which they occur, like any other organism. They are an important source of food for many species. Typically, the older parts of a plant will have more epiphytes growing on them. Epiphytes differ from parasites in that they grow on other plants for physical support and do not necessarily affect the host negatively. An organism that grows on another organism that is not a plant may be called an epibiont. Epiphytes are usually found in the temperate zone (e.g., many mosses, liverworts, lichens, and algae) or in the tropics (e.g., many ferns, cacti, orchids, and bromeliads). Epiphyte species make good houseplants due to their minimal wat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myrmecophyte
Myrmecophytes (; literally "ant-plant") are plants that live in a mutualistic association with a colony of ants. There are over 100 different genera of myrmecophytes. These plants possess structural adaptations that provide ants with food and/or shelter. These specialized structures include domatia, food bodies, and extrafloral nectaries. In exchange for food and shelter, ants aid the myrmecophyte in pollination, seed dispersal, gathering of essential nutrients, and/or defense. Specifically, domatia adapted to ants may be called myrmecodomatia. Mutualism Myrmecophytes share a mutualistic relationship with ants, benefiting both the plants and ants. This association may be either facultative or obligate. Obligate mutualism In obligate mutualisms, both of the organisms involved are interdependent; they cannot survive on their own. An example of this type of mutualism can be found in the plant genus ''Macaranga''. All species of this genus provide food for ants in various ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brocchinia Acuminata
''Brocchinia acuminata'' is a species of plant in the genus ''Brocchinia''. This species is native to Venezuela and Colombia Colombia (, ; ), officially the Republic of Colombia, is a country in South America with insular regions in North America—near Nicaragua's Caribbean coast—as well as in the Pacific Ocean. The Colombian mainland is bordered by the Car .... References acuminata Flora of Venezuela Flora of Colombia Plants described in 1939 {{Bromeliad-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phosphatase
In biochemistry, a phosphatase is an enzyme that uses water to cleave a phosphoric acid Ester, monoester into a phosphate ion and an Alcohol (chemistry), alcohol. Because a phosphatase enzyme catalysis, catalyzes the hydrolysis of its Substrate (chemistry), substrate, it is a subcategory of hydrolases. Phosphatase enzymes are essential to many biological functions, because phosphorylation (e.g. by protein kinases) and dephosphorylation (by phosphatases) serve diverse roles in cell growth, cellular regulation and cell signaling, signaling. Whereas phosphatases remove phosphate groups from molecules, kinases catalyze the transfer of phosphate groups to molecules from Adenosine triphosphate, ATP. Together, kinases and phosphatases direct a form of post-translational modification that is essential to the cell's regulatory network. Phosphatase enzymes are not to be confused with phosphorylase enzymes, which catalyze the transfer of a phosphate group from hydrogen phosphate to an acce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nectar
Nectar is a sugar-rich liquid produced by plants in glands called nectaries or nectarines, either within the flowers with which it attracts pollinating animals, or by extrafloral nectaries, which provide a nutrient source to animal mutualists, which in turn provide herbivore protection. Common nectar-consuming pollinators include mosquitoes, hoverflies, wasps, bees, butterflies and moths, hummingbirds, honeyeaters and bats. Nectar plays a crucial role in the foraging economics and evolution of nectar-eating species; for example, nectar foraging behavior is largely responsible for the divergent evolution of the African honey bee, ''A. m. scutellata'' and the western honey bee. Nectar is an economically important substance as it is the sugar source for honey. It is also useful in agriculture and horticulture because the adult stages of some predatory insects feed on nectar. For example, a number of parasitoid wasps (e.g. the social wasp species ''Apoica flavissima'') rely ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brocchinia Hechtioides
''Brocchinia hechtioides'' is a species of plant in the genus ''Brocchinia''. This species is native to Venezuela and Guyana. It is one of the two or three members of the genus (the others being '' B. reducta'' and possibly '' B. tatei'') that appear to be carnivorous. The leaves form an urn An urn is a vase, often with a cover, with a typically narrowed neck above a rounded body and a footed pedestal. Describing a vessel as an "urn", as opposed to a vase or other terms, generally reflects its use rather than any particular shape or ... which captures water and also serves as a pitfall trap for insects. References hechtioides Flora of Venezuela Flora of Guyana Guayana Highlands Plants described in 1913 {{Bromeliad-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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