Populational approach in ecophysiological studies: the case of Plathymenia reticulata, a tree from Cerrado and Atlantic Forest

Lemos-Filho, José P.; Goulart, Maíra Figueiredo; Lovato, Maria Bernadete

doi:10.1590/s1677-04202008000300005

Cited by 15 publications

(11 citation statements)

References 43 publications

(11 reference statements)

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“…Warwick & Lewis (2003) recently revised this circumscription and synonymized P. foliolosa onto P. reticulata , thereby making the genus monospecific. Recent morphological and ecophysiological studies have corroborated it (revised by Lemos‐Filho et al. 2008).…”

Section: Introductionmentioning

confidence: 82%

Phylogeography ofPlathymenia reticulata(Leguminosae) reveals patterns of recent range expansion towards northeastern Brazil and southern Cerrados in Eastern Tropical South America

Novaes

Lemos-Filho

Ribeiro³

et al. 2010

Molecular Ecology

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Little is known about past vegetation dynamics in Eastern Tropical South America (ETSA). Here we describe patterns of chloroplast (cp) DNA variation in Plathymenia reticulata, a widespread tree in the ETSA Atlantic Forest and Cerrado biomes, but not found in the xeromorphic Caatinga. Forty one populations, comprising 220 individuals, were analysed by sequencing the trnS-trnG and trnL-trnL-trnF cpDNA regions. Combined, they resulted in 18 geographically structured haplotypes. The central region of the sampling area, comprising Minas Gerais and Goiás Brazilian states, is a centre of genetic diversity and probably the most longstanding area of the distribution range of the species. In contrast, populations from northeastern Brazil and the southern Cerrados showed very low diversity levels, almost exclusively with common haplotypes which are also found in the central region. Coupled with a long-branched star-like network, these patterns suggest a recent range expansion of P. reticulata to those regions from central region sources. The recent origin of the species (in the early Pleistocene) or the extinction of some populations due to drier and cooler climate during the last glacial maximum could have been responsible for that phylogeographic pattern. The populations from northeastern Brazil originated from two colonization routes, one eastern (Atlantic) and one western (inland). Due to its high diversity and complex landscape, the central region, especially central-north Minas Gerais (between 15 degrees -18 degrees S and 42 degrees -46 degrees W), should be given the highest priority for conservation.

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Section: Introductionmentioning

confidence: 82%

Phylogeography ofPlathymenia reticulata(Leguminosae) reveals patterns of recent range expansion towards northeastern Brazil and southern Cerrados in Eastern Tropical South America

Novaes

Lemos-Filho

Ribeiro³

et al. 2010

Molecular Ecology

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“…This was corroborated by a study by Goulart et al (2011) that evaluated the response of several morphological and physiological traits to different light levels. Ecotypes of P. reticulata also differ in size: the Cerrado individuals are shorter and tortuously branched, whereas the forest individuals may reach 30 m in height and exhibit straighter trunks (Lemos-Filho et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Stem radial increment of forest and savanna ecotypes of a Neotropical tree: relationships with climate, phenology, and water potential

Toledo

Paiva

Lovato

et al. 2012

Trees

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The aim of the present study was to investigate differences in stem radial increment between the savanna and forest ecotypes of Plathymenia reticulata at an ecotonal site. It was hypothesised that even under similar climate conditions, the savanna and forest ecotypes exhibit differences in radial growth, phenology, and water status because of differences in wood density. Stem radial increment, phenology, and water potential were evaluated monthly. The radial increment was positively related to precipitation and displayed no increment (or decrement) in months with low rainfall. A negative relationship was observed between radial growth and wood density, with the forest ecotype exhibiting a higher radial increment than the savanna ecotype. Midday water potential (W MD ) was also negatively related to wood density. Compared to the forest ecotype, the savanna ecotype displayed lower values of W MD during the dry season and started leaf senescence earlier at the beginning of the dry season. Leaf fall improved water status, resulting in leaf flushing even without a significant increase in rainfall. Radial growth significantly increased only after the crown leaf cover was completed. The results confirmed the importance of wood density in the differential responses of ecotypes in relation to growth, water status, and phenology.

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“…Uma forma de distinguir como fatores ambientais estão envolvidos na variação natural encontrada em características funcionais é através do estudo de espécies filogeneticamente relacionadas e que ocupam ambientes contrastantes Barros et al 2012). Sob tais aspectos, têm sido realizados muitos estudos ecofisiológicos utilizando-se espécies filogeneticamente similares, objetivando-se identificar e caracterizar as diferenças entre as mesmas, tanto em relação à utilização de recursos do meio quanto em relação à resposta funcional em diferentes condições de estresse (Hoffmann & Franco 2003;Hoffmann et al 2004;Lemos-Filho et al 2008;Barros et al 2012). De modo geral, tais estudos têm sido realizados utilizando-se espécies arbóreas congenéricas de ambientes florestais e savânicos, como forma de explicar a preferência de habitas e a dinâmica que governa o ecótono floresta-savana.…”

Section: Plasticidade Fenotípica Em Plantasunclassified

“…Por outro lado, diferenças encontradas nas respostas funcionais entre espécies do mesmo gênero podem ter evoluído em condições ambientais passadas e, neste caso, podem não ser facilmente relacionadas às condições ambientais atuais (Lemos-Filho et al 2008).…”

Section: Plasticidade Fenotípica Em Plantasunclassified

“…Neste sentido e a fim de se compreender as diferenças nas respostas funcionais associadas à adaptação a ambientes diferentes, também se torna interessante a comparação entre populações de uma mesma espécie (Lemos-Filho et al 2008), havendo a vantagem adicional de que tais populações podem apresentar maior afinidade genética entre si e, neste caso, quaisquer diferenças encontradas nas respostas funcionais estarão, possivelmente, mais relacionadas às condições ambientais atuais (Bazzaz 1996;Lüttge & Scarano 2004;Bradshaw 2006).…”

Section: Plasticidade Fenotípica Em Plantasunclassified

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Fatores ambientais e a germinação de espécies arbóreas do Brasil Central e de áreas disjuntas da Amazônia no bioma Cerrado

Ribeiro¹

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x nos níveis de alguns estresses ambientais (aumento no déficit hídrico do solo, maiores temperaturas máximas e aumento na frequência de fogo) em diversas regiões onde o bioma Cerrado ocorre, os quais podem influenciar diretamente o processo germinativo. Considerando tais aspectos e de acordo com os resultados descritos para as três espécies deste estudo, mudanças ambientais serão, possivelmente, mais limitantes ao recrutamento de espécies, por sementes, às populações dos cerrados do Brasil Central.

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Populational approach in ecophysiological studies: the case of Plathymenia reticulata, a tree from Cerrado and Atlantic Forest

Cited by 15 publications

References 43 publications

Phylogeography ofPlathymenia reticulata(Leguminosae) reveals patterns of recent range expansion towards northeastern Brazil and southern Cerrados in Eastern Tropical South America

Phylogeography ofPlathymenia reticulata(Leguminosae) reveals patterns of recent range expansion towards northeastern Brazil and southern Cerrados in Eastern Tropical South America

Stem radial increment of forest and savanna ecotypes of a Neotropical tree: relationships with climate, phenology, and water potential

Fatores ambientais e a germinação de espécies arbóreas do Brasil Central e de áreas disjuntas da Amazônia no bioma Cerrado

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