Desenvolvimento de Adiantopsis radiata, Pteris denticulata (Pteridaceae) e Polypodium latipes (Polypodiaceae) em condições naturais

Ranal, Marli A.

doi:10.1590/s0102-33061991000200002

Cited by 7 publications

(5 citation statements)

References 16 publications

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“…The progressive loss of pinnules, which is considered a symptom of leaf mortality in D. truncatula , was similar to the loss reported by Ranal () for Adiantopsis radiata (L.) Fée., which also has a leafless petiole and rachis. It is likely that this symptom was associated with leaf characteristics (e.g.…”

Section: Discussionsupporting

confidence: 86%

Phenological studies of selected leaf and plant traits ofDidymochlaena truncatula(Dryopteridaceae) in a Brazilian submontane tropical rainforest

Farias

Costa

Silva

et al. 2014

Nordic Journal of Botany

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. Professor Moraes R ê go, Recife, PE, Brasil. Th e phenology of the herbaceous fern Didymochlaena truncatula in a Brazilian submontane tropical rainforest is described. A total of 23 individuals were observed over 18 months (May 2012 to October 2013. Th e number of live leaves, leaf production, leaf mortality, leaf growth, and fertility were recorded monthly and correlated with local rainfall and temperature. Th e D . truncatula plants remained evergreen with a monthly mean of 6.49 Ϯ 0.75 leaves that were produced almost continuously at a rate of 6.13 Ϯ 1.46 leaves plant Ϫ1 year Ϫ1 . Th is rate was higher than the leaf mortality rate, which was 4.61 Ϯ 1.27 leaves plant Ϫ1 year Ϫ1 . Monthly leaf growth of the population was correlated with rainfall. Leaf expansion was fastest in the fi rst month after emergence (1.31 Ϯ 1.03 cm day Ϫ1 ). Fertility and leaf production intensity were not correlated with climate factors or seasonal variations. However, leaf mortality was negatively correlated with rainfall, causing variations in the number of leaves throughout the year. Th ese results show that the phenological rhythms of D . truncatula were not equally infl uenced by climate variations. Th e phenology of D . truncatula corresponds to the phenology of a small number of aseasonal tropical ferns.Phenology is the study of the periodicity of biological processes and their relationships with abiotic and biotic factors (Lieth 1974). Phenology is important because it refl ects how the environment aff ects the growth, development, and reproduction of plants. In addition, phenology is important for understanding the ecological interactions of plants and the effi ciency of applied management and conservation practices (Johnson-Groh and Lee 2002). Despite their importance, phenological studies are scarce for certain plant groups, such as ferns, which are important constituents of tropical rainforest understories (Sharpe andMehltreter 2010, Sharpe et al. 2010). According to Wagner and G ó mez (1983), abiotic factors may be the main determinants of phenological patterns in ferns, partially because of their independence from pollinators and dispersers.Climate seasonality is likely the most important factor that infl uences plant phenological patterns (Arroyo et al. 1981). Generally, ferns display seasonal phenological patterns in temperate (Odland 1995) and tropical habitats, particularly in regions with a well-defi ned dry season Palacios-Rios 2003, Mehltreter 2006). For example, diff erent isolated or combined factors cause these patterns, including water availability. Additionally, temperature and photoperiod variations may determine the seasonality of ferns. Intrinsic characteristics of the species may also aff ect their biological rhythms (Mehltreter 2008) and cause seasonal responses.In tropical regions, the complexity of habitats (and climate regimes) and the diversity of ferns can enable a better understanding of plant interactions through new phenological studies. Such studies can provide information on diff erent phe...

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Section: Discussionsupporting

confidence: 86%

Phenological studies of selected leaf and plant traits ofDidymochlaena truncatula(Dryopteridaceae) in a Brazilian submontane tropical rainforest

Farias

Costa

Silva

et al. 2014

Nordic Journal of Botany

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“…Branch tips terminate in shaded boxes that indicate the farinose condition observed for the sporophytic and gametophytic phases of that taxon. The source for determining the gametophyte status for each taxon is listed to the right of the figure: TS = cultivated for this study; 1 = Giauque (1949); 2 = Hitt and Knobloch (1967); 3 = Knobloch et al (1973); 4 = Nayar and Bajpai (1964); 5 = Pray (1967); 6 = Ranal (1991); 7 = Tryon (1947); 8 = Whittier (1965); 9 = Windham, personal observation; 10 = Wollenweber (1984); 11 = Woronin (1907). 1 Originally identified as C. tomentosa in Whittier (1965), later corrected to C. castanea (= C. eatonii ) by Whittier (1970).…”

Section: Resultsmentioning

confidence: 99%

Unique expression of a sporophytic character on the gametophytes of notholaenid ferns (Pteridaceae)

Johnson

Rothfels

Windham

et al. 2012

American J of Botany

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“…The data about the anatomy of A. radiata are scarce; only the morphological aspects have been discussed by Ranal (1991) and Link-Pérez & Hickey (2011). Therefore, the results reported here provide the first record about the leaf anatomical morphology of this species.…”

Section: Discussionmentioning

confidence: 80%

Anatomía comparada en cuatro helechos Cheilantoideos

Bruno¹,

Solís²,

Yesilyurt³

et al. 2019

Bol. Soc. Argent. Bot.

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Introducción y objetivos: Algunas especies de helechos cheilanthoideos son caracterizados por presentar adaptaciones a hábitats xéricos. Además, presentan la particularidad de enrollar sus láminas frente a condiciones de stress hídrico. Sin embargo, al retornar las condiciones ambientales óptimas las láminas se vuelven a expandir. El objetivo de este trabajo es proporcionar información morfo-anatómica de las frondes y asociar estructuras anatómicas a estos movimientos foliares.M&M: Se estudiaron mediante microscopía óptica y electrónica de barrido la morfo-anatomía de las frondes de cuatro especies: Adiantopsis radiata, Cheilanthes glauca, Doryopteris concolor, y D. pentagona. Además, se analizó la densidad de los estomas y se calculó el índice estomático.Resultados: Se observó mesófilo homogéneo en A. radiata y D. pentagona. Cheilanthes glauca y Doryopteris concolor presentaron mesófilo heterogéneo dorsiventral. Todas las especies mostraron hojas hipoestómaticas y estomas de tipo anomocítico. El índice estomático osciló entre 9,1% (A. radiata) y 14,1% (D. concolor) y el rango de densidad de los estomas fue de 39,7 (D. pentagona) y 57,8 (D. concolor).Conclusiones: El mesófilo observado en A. radiata y D. pentagona refleja la especialización para habitar ambientes mesófilos. El mesófilo heterogéneo dorsiventral de Doryopteris concolor podría ser una ventaja para su hábito epifítico facultativo. Cheilanthes glauca tiene características xeromorfas y mesomorfas, probablemente como resultado de la disponibilidad de agua en el ambiente durante las diferentes estaciones. Se propone como hipótesis que el engrosamiento de las paredes anticlinales de las células epidérmicas podría estar involucrados en los movimientos de las láminas.

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Desenvolvimento de Adiantopsis radiata, Pteris denticulata (Pteridaceae) e Polypodium latipes (Polypodiaceae) em condições naturais

Cited by 7 publications

References 16 publications

Phenological studies of selected leaf and plant traits ofDidymochlaena truncatula(Dryopteridaceae) in a Brazilian submontane tropical rainforest

Phenological studies of selected leaf and plant traits ofDidymochlaena truncatula(Dryopteridaceae) in a Brazilian submontane tropical rainforest

Unique expression of a sporophytic character on the gametophytes of notholaenid ferns (Pteridaceae)

Anatomía comparada en cuatro helechos Cheilantoideos

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