The number and kinds of embryo-bearing plants which have become aquatic: a survey

Cook, Christopher D.K.

doi:10.1078/1433-8319-00066

Cited by 92 publications

(92 citation statements)

References 22 publications

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“…No presente estudo esta mesma tendência se manteve. Existem razões para se esperar que as famílias Cyperaceae e Poaceae tenham maior riqueza de espécies, já que é estimado que possuam, respectivamente, mais de 5000 e 10000 espécies (Watson & Dallwitz 1992, Goetghebeur 1998 com 30% e 9% dos gêneros tendo espécies aquáticas (Cook 1999;Rutishauser com. pess.…”

Section: Resultsunclassified

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Levantamento florístico de plantas aquáticas e palustres na Represa Guarapiranga, São Paulo, Brasil

2017

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-(Floristic composition of aquatic and palustris plants in the Guarapiranga Reservoir, São Paulo, Brazil). The aim of this study was to investigate the composition of aquatic and palustris plants in the Guarapiranga reservoir, and to contribute to the taxonomic knowledge of the species. Monthly fieldworks were performed from June/2008 to May/2009, in 20 stands of aquatic plants distributed throughout the reservoir. The species present were collected and registered in each stand. The aquatic macrophytes community of the reservoir is composed of 133 species belonging to 89 genera distributed in 45 families being 127 angiosperms, five ferns and one liverwort. The most representative families were Cyperaceae with 27 species, followed by Poaceae (14) and Asteraceae (10). Of the 67 species considered as weeds, only 14 are subspontaneous or naturalized, the other 120 species are native, six of which are endemic in Brazil. The present work contributed significantly to the flora of aquatic plants and palustris of São Paulo, as well as to List of Flora of Brazil, registering species that had not been previously recorded to the state of São Paulo, in this the work is besides a key of identification and descriptions of the species present in the study area. In conclusion, species richness of aquatic plants and palustris at Guarapiranga is high. Key words: Aquatic plants, macrophytes, wetlands, hydrophytes.Resumo -(Levantamento florístico de plantas aquáticas e palustres na Represa Guarapiranga, São Paulo, Brasil) -O objetivo desse trabalho foi verificar a composição de plantas aquáticas e palustres no reservatório Guarapiranga, além de contribuir para o conhecimento taxonômico das espécies. Foram realizadas coletas mensais de julho/2008 a junho/2009, em 20 bancos de plantas aquáticas distribuídos ao longo de todo o reservatório. Em cada banco foram coletadas e registradas as espécies presentes. A comunidade de plantas aquáticas e palustres do reservatório é composta por 133 espécies, pertencentes a 89 gêneros, distribuídos em 45 famílias, sendo 127 de Angiospermas, 5 de Samambaias e 1 de Hepática. As famílias mais representativas foram Cyperaceae com 27 espécies, seguida de Poaceae (14) e Asteraceae (10). Das 67 espécies consideradas plantas daninhas ou infestantes, apenas 14 são subespontâneas ou naturalizadas, as demais 120 espécies são nativas, sendo 6 endêmicas do Brasil. O presente trabalho contribuiu significativamente para a Flora de plantas aquáticas e palustres, bem como para Lista da Flora do Brasil, registrando espécies que não haviam sido referidas anteriormente para o estado de São Paulo, além da apresentação de uma chave de identificação e descrições para as espécies presentes na área de estudo. Foi possível concluir que a Represa Guarapiranga possui uma elevada riqueza de plantas aquáticas e palustres Palavras-chave: plantas aquáticas, macrófitas, alagados, hidrófitas.

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Section: Resultsunclassified

“…Segundo Cook (1999), a tribo Eleocharideae é considerada exclusivamente aquática, explicando assim o fato de Eleocharis ser bem representado no presente levantamento. Junto com Eleocharis os gêneros Cyperus, Ludwigia e Polygonum apresentam maior riqueza específica nos levantamentos com plantas aquáticas e palustres.…”

Section: Resultsunclassified

Levantamento florístico de plantas aquáticas e palustres na Represa Guarapiranga, São Paulo, Brasil

2017

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“…It is generally accepted that aquatic angiosperms were derived from plants that previously lived in terrestrial environments (17). Only about 2% of angiosperms are aquatic today (18). The data presented here raise questions about the aquatic nature of some of the earliest angiosperms and their place in angiosperm history.…”

Section: Significancementioning

confidence: 88%

Montsechia , an ancient aquatic angiosperm

Gómez

Daviero‐Gomez

Coiffard

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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“…Makrofitom, ki plavajo na vodni gladini ali so potopljeni, pa pravimo tudi hidrofiti ali prave vodne rastline. Nekatere vodne rastline imajo amfibijski značaj (Cook 1999;Germ 2013). Vodne rastline imajo pomembno ekološko vlogo, saj omogočajo nastanek raznovrstnih življenjskih prostorov in tako povečajo biotsko pestrost v vodnem ekosistemu.…”

Section: Vodne Rastlineunclassified

Selen v vodnih in kopenskih rastlinah / Selenium in water and in terrestrial plants

Lukšič

Germ

2017

Folia Biologica Et Geologica

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IZVLEČEK Selen v vodnih in kopenskih rastlinahTako vodne kot kopenske rastline so sposobne privzemati selen iz okolja. Sposobnost privzema selena se med vrstami in skupinami rastlin razlikuje. Rastline iz tal privzemajo selen prvenstveno v obliki selenata, ki ga nato pretvorijo v selenit in selenove-aminokisline, kot sta selenometionin in selenocistein. Zaradi različnih antropogenih dejavnikov in predvsem dejavnosti človeka, se povečuje obremenjenost vodnih virov s selenom. Vodne rastline, ki so sposobne privzemati večje količine selena iz vode, lahko uporabimo za čiščenje s selenom obremenjenih umetno ustvarjenih in naravnih vodnih teles. Služijo lahko tudi kot bioindikatorji obremenjenosti s selenom. Selen ima pri kopenskih rastlinah pozitiven učinek na rast rastlin in dozorevanje semen. Pozitivni učinki selena se odražajo tudi v večji zaščitenosti rastlin pred ultravijoličnim sevanjem, mrazom, sušo in zmanjšanim privzemom težkih kovin iz tal ter večjo zaščitenostjo rastlin pred patogeni in rastlinojedci. Prisotnost selena v kmetijskih rastlinah vpliva na zmanjšanje proizvodnje rastlinskega hormona etilena, ki je odgovoren za senescenco in zorenje plodov. Selen tako lahko prispeva tudi k daljši obstojnosti plodov. Rastline, ki imajo večjo sposobnost za privzem selena iz tal, lahko uporabimo tudi za fitoremediacijo s selenom onesnaženih tal. Poznavanje načinov privzema in akumulacije selena v vodne in kopenske rastline je ključno za razumevanje kroženja selena v okolju.Ključne besede: selen, vodne rastline, kopenske rastline ABSTRACT Selenium in water and in terrestrial plantsAquatic as well as terrestrial plants are able to uptake selenium from the environment. The ability to uptake selenium differs between plants. Plants uptake selenium primarily as a selenate, which is then converted into selenite and selenium-amino acids, such as selenomethionine and selenocysteine. Due to various anthropogenic factors and man's activity, pollution of water sources with selenium is increasing. Aquatic plants that are capable of absorbing selenium from water can be used for purifying waters contaminated with selenium in artificial and natural water bodies. In water bodies they can also be used as bioindicators of pollution with selenium. Selenium has a positive effect on plant growth and maturation of seeds in terrestrial plants. Positive effects of selenium are also shown in the increased protection of plants against ultraviolet radiation, cold, drought and reduced uptaking the heavy metals from the soil, and greater protection of plants against pathogens and herbivores. The presence of selenium in agricultural plants lowers the production of plant hormone -ethylene, which is responsible for senescence and ripening of the fruits. Selenium thus can also contribute to longer stability of plant fruits. Plants that have greater ability to uptake selenium from the soil can also be used for phytoremediation with selenium contaminated soils. Knowledge of the techniques of absorption and accumulation of selenium in aquatic and terr...

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The number and kinds of embryo-bearing plants which have become aquatic: a survey

Cited by 92 publications

References 22 publications

Levantamento florístico de plantas aquáticas e palustres na Represa Guarapiranga, São Paulo, Brasil

Levantamento florístico de plantas aquáticas e palustres na Represa Guarapiranga, São Paulo, Brasil

Montsechia , an ancient aquatic angiosperm

Selen v vodnih in kopenskih rastlinah / Selenium in water and in terrestrial plants

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