Bark anatomy of Melastomataceae species in the Brazilian Cerrado, a neotropical savanna

2021 ◽  
Author(s):  
Camilla Rozindo Dias Milanez ◽  
Carmen Regina Marcati ◽  
Silvia Rodrigues Machado
Keyword(s):  
Brazilian Cerrado ◽  
Neotropical Savanna ◽  
Bark Anatomy

scholarly journals Morpho-anatomical features of underground systems in six Asteraceae species from the Brazilian Cerrado

2011 ◽  
Vol 83 (3) ◽  
pp. 981-992 ◽  
Author(s):  
Beatriz Appezzato-da-Glória ◽  
Graziela Cury
Keyword(s):  
Environmental Conditions ◽  
Lateral Roots ◽  
Adaptive Strategy ◽  
Herbaceous Species ◽  
Bud Bank ◽  
Brazilian Cerrado ◽  
Neotropical Savanna ◽  
Anatomical Features ◽  
Paulo State ◽  
Vegetation Regeneration

In the Brazilian Cerrado (neotropical savanna), the development of bud-bearing underground systems as adaptive structures to fire and dry periods can comprise an important source of buds for this ecosystem, as already demonstrated in the Brazilian Campos grasslands and North American prairies. Asteraceae species from both woody and herbaceous strata have subterranean organs that accumulate carbohydrates, reinforcing the adaptive strategy of these plants to different environmental conditions. This study aims to analyse the morpho-anatomy of underground systems of six species of Asteraceae (Mikania cordifolia L.f. Willd., Mikania sessilifolia DC, Trixis nobilis (Vell.) Katinas, Pterocaulon alopecuroides (Lam.) DC., Vernonia elegans Gardner and Vernonia megapotamica Spreng.), to describe these structures and to verify the occurrence and origin of shoot buds, and to analyse the presence of reserve substances. Individuals sampled in Cerrado areas in São Paulo State showed thick underground bud-bearing organs, with adventitious or lateral roots and presence of fructans. Xylopodium was found in all studied species, except for Trixis nobilis, which had stem tuber. The presence of fructans as reserve, and the capacity of structures in the formation of buds indicate the potential of herbaceous species of Asteraceae in forming a viable bud bank for vegetation regeneration in the Brazilian Cerrado.

scholarly journals Seed rain generated by bats under Cerrado’s pasture remnant trees in a Neotropical savanna

2015 ◽  
Vol 75 (4 suppl 1) ◽  
pp. 25-34 ◽  
Author(s):  
J. Ragusa-Netto ◽  
A. A. Santos
Keyword(s):  
Tree Species ◽  
Seed Rain ◽  
Brazilian Cerrado ◽  
Neotropical Savanna ◽  
Rain Intensity ◽  
Mature Trees ◽  
The World ◽  
Seed Fall ◽  
The Relationship ◽  
Number Of Seeds

Abstract In this study we described the seed rain generated by bats under four Cerrado’s tree species common within pastures, Buchenavia tomentosa, Couepia grandiflora, Licania humilis and Qualea grandiflora. We analyzed the similarity among the four tree species in terms of seed rain composition, and compared the number of seeds and seed species deposited under them. Besides that, we assessed the relationship between seed rain intensity and the density of each tree species. Then, we randomly selected 10 mature trees of each species to sample seed rain. We recorded a total of 4892 bat dispersed seeds from 11 species. Also, we observed that along the year seed deposition varied substantially under all trees. At least two seed sub-communities could be distinguished according to tree species used by bats as feeding roost. One related to Couepia grandiflora and Licania humilis, and the other to Buchenavia tomentosa and Qualea grandiflora trees. The variability of seed rain composition in any particular tree and the range of actual seed fall into a particular species indicate patchiness in seed rain, and the overall results appear to be consistent in terms of a substantial and diverse seed rain generated by bats in a highly anthropized landscape. This is the first study concerning seed dispersal by bats in modified Brazilian Cerrado, one of the most endangered biomes in the world. In this respect, by preserving a dense and diverse collection of remnant trees within today's pastures may, potentially, contribute to a faster Cerrado recovery in extensive areas that can be reclaimed for restoration in the future.

Two new dwarf species of Homalolepis (Simaroubaceae) from the Brazilian Cerrado (Neotropical savanna)

Phytotaxa ◽  
2018 ◽  
Vol 336 (3) ◽  
pp. 252
Author(s):  
MARCELO F. DEVECCHI ◽  
WILLIAM W. THOMAS ◽  
JOSÉ R. PIRANI
Keyword(s):  
National Park ◽  
Conservation Status ◽  
Molecular Evidence ◽  
Brazilian Cerrado ◽  
Neotropical Savanna ◽  
Single Population ◽  
Diagnostic Features ◽  
Distribution Maps ◽  
Minas Gerais State ◽  
Total Diversity

We describe and illustrate two new species of Homalolepis Turcz. (Simaroubaceae), a genus recently reinstated based on molecular evidence indicating that Simaba Aubl. as currently circumscribed is not monophyletic. Both species are dwarf, geoxylic subshrubs with restricted distribution in the Brazilian savanna (cerrado). Homalolepis planaltina is so far known from a single population, in highland fields of southeastern Minas Gerais state, and belongs to H. sect. Grandiflorae. The few known populations of H. pumila are restricted to the Emas National Park in the state of Goiás and belong to H. sect. Homalolepis. We present live pictures of plants of both species in their habitats, as well as drawings of diagnostic features, an identification key to the geoxylic species, detailed descriptions, distribution maps, data on geography and ecology, the conservation status, and comments on morphology and closely related taxa. These two new taxa increase the total diversity of the genus to 28 accepted species.

scholarly journals Chromosome studies on Brazilian cerrado plants

2000 ◽  
Vol 23 (4) ◽  
pp. 947-955 ◽  
Author(s):  
Eliana Regina Forni-Martins ◽  
Fernando Roberto Martins
Keyword(s):  
Chromosome Numbers ◽  
Brazilian Cerrado ◽  
Forest Species ◽  
Neotropical Savanna ◽  
Evolutionary Time ◽  
Central Plateau ◽  
Reproductive Process ◽  
The Past ◽  
Floristic Elements ◽  
The Moment

Cerrado is the Brazilian name for the neotropical savanna, which occurs mainly in Brazilian Central Plateau, composed of herbaceous-subshrubby and shrubby-arboreal floras, both of which are heliophilous, highly diverse and regionally differentiated. Considering species distribution and chromosome numbers, some authors have proposed that the herbaceous-subshrubby flora of the neotropical savanna is quite old, while the shrubby-arboreal flora is derived from forests, a hypothesis that implies higher chromosome numbers in the savanna than in the forest. If, however, chromosome numbers are similar in the cerrado and in forests, both could be similarly old, indicating that bi-directional flow of flora occurred in the past. This paper presents data on chromosome numbers and microsporogenesis for 20 species in 13 families collected in the States of São Paulo, Goiás and Minas Gerais, providing previously unpublished data for Myrcia (Myrtaceae), Luxemburgia (Ochnaceae) and Hortia (Rutaceae). Meiosis proved to be normal, indicating regularity in the sexual reproductive process. Chromosome numbers varied from 2n = 18 (Allamanda angustifolia: Apocynaceae) to 2n = ca. 104 (Ouratea spectabilis: Ochnaceae), being low (20 < 2n < 30) in most of the species. Since similar numbers have been observed with forest species, it is not, at the moment, possible to support the hypothesis that cerrado species derived from the surrounding forests. Instead, we suggest the possibility of a bi-directional exchange of floristic elements between cerrado and forests during evolutionary time.

scholarly journals Genome Sequence of Streptomyces cavourensis 1AS2a, a Rhizobacterium Isolated from the Brazilian Cerrado Biome

2019 ◽  
Vol 8 (18) ◽  
Author(s):  
Harold Alexander Vargas Hoyos ◽  
Suikinai Nobre Santos ◽  
Gabriel Padilla ◽  
Itamar Soares Melo
Keyword(s):  
Gene Clusters ◽  
Antimicrobial Activities ◽  
Open Reading Frames ◽  
Biosynthetic Gene ◽  
Brazilian Cerrado ◽  
Neotropical Savanna ◽  
Biosynthetic Gene Clusters ◽  
Content Type ◽  
Wheat Rhizosphere ◽  
Reading Frames

Streptomyces cavourensis strain 1AS2a, isolated from wheat rhizosphere in the Brazilian Neotropical savanna, exhibits strong antimicrobial activities. Its genome comprises 7,600,475 bp with 6,590 open reading frames (ORFs) that reveal 30 biosynthetic gene clusters (BGCs).

Evaluation of the in vitro trypanocidal activity of plant extracts from the Brazilian Cerrado

Planta Medica ◽  
2009 ◽  
Vol 75 (09) ◽  
Author(s):  
WR Cunha ◽  
FM Dos Santos ◽  
JA Peixoto ◽  
RCS Veneziani ◽  
AEM Crotti ◽  
...  
Keyword(s):  
Plant Extracts ◽  
Brazilian Cerrado ◽  
Trypanocidal Activity

High throughput screening to investigate Brazilian Cerrado biome plant extract bank chemical diversity

Planta Medica ◽  
2016 ◽  
Vol 81 (S 01) ◽  
pp. S1-S381
Author(s):  
LS Espindola ◽  
RG Dusi ◽  
KR Gustafson ◽  
J McMahon ◽  
JA Beutler
Keyword(s):  
High Throughput ◽  
Plant Extract ◽  
High Throughput Screening ◽  
Chemical Diversity ◽  
Brazilian Cerrado ◽  
Cerrado Biome

A New Species of Turnera (Turneraceae, Passifloraceae s. l.) from the Brazilian Cerrado

2020 ◽  
Vol 45 (4) ◽  
pp. 826-832
Author(s):  
Lamarck Rocha ◽  
Maria Mercedes Arbo
Keyword(s):  
New Species ◽  
Brazilian Cerrado ◽  
Distribution Map ◽  
Sem Images ◽  
Dark Blue ◽  
A New Species

Abstract—Turnera macrosperma, a new species from the Brazilian Cerrado, is described and illustrated. The new species belongs to the series Turnera and can be characterized by the white petals with dark blue/violet basal spot and large seeds with papillose aril. SEM images, distribution map, and comments on taxonomy and morphology are presented.

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