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[932] Senegalia polyphylla (DC.) Britton & Rose ex Britton & Killip (Fig. 32B) Ann. New York Acad. Sci. 35: 142 [1 Apr. 1936] (Britton & Killip 1936). — Acacia polyphylla DC., Cat. Pl. Horti Monsp.: 74 (Candolle 1813). — Mimosa polyphylla (DC.) Poir., Encycl. [J. Lamarck et al.] Suppl. 5: 530 [1 Nov. 1817] (Poiret 1817). Acacia riparia Bertero ex Spreng., Syst. Veg. [Sprengel] 3: 142 [Jan.- Mar. 1826] (Sprengel 1826), nom. illeg. hom., non Kunth (1824). Leucaena boliviana Rusby, Bull. New York Bot. Gard. 8 (28): 91 [23 Nov. 1912] (Rusby 1912). Senegalia lobana Britton & Killip, Ann. New York Acad. Sci. 35: 142 [1 Apr. 1936] (Britton & Killip 1936). Acacia glomerosa Benth., London J. Bot. 1: 521 (Bentham 1842). — Senegalia glomerosa (Benth.) Britton & Rose, N. Amer. Fl. 23 (2): 116 [25 Sep. 1928] (Britton & Rose 1928). Senegalia langlassei Britton & Rose, N. Amer. Fl. 23 (2): 116 [25 Sep. 1928] (Britton & Rose 1928). — Acacia langlassei (Britton & Rose) Bullock, Bull. Misc. Inform. Kew 1939 (1): 2 [15 Feb. 1939] (Bullock 1939). Senegalia tomentella Britton & Killip, Ann. New York Acad. Sci. 35: 145 [1 Apr. 1936] (Britton & Killip 1936). VERNACULAR NAMES. — Br: juqueiri-guaçu, paricá-branco, paricarana-de-espinho. HERBARIUM DATA (FG). — A single collection, D. Sabatier et al. 6009. INVENTORY DATA (FG). — 5 trees in 1 plot; Fmax, Published as part of Molino, Jean-François, Sabatier, Daniel, Grenand, Pierre, Engel, Julien, Frame, Dawn, Delprete, Piero G., Fleury, Marie, Odonne, Guillaume, Davy, Damien, Lucas, Eve J. & Martin, Claire A., 2022, An annotated checklist of the tree species of French Guiana, including vernacular nomenclature, pp. 345-903 in Adansonia (3) (3) 44 (26) on page 537, DOI: 10.5252/adansonia2022v44a26, http://zenodo.org/record/7458777

29. Senegalia polyphylla (De Candolle 1822: 1813) Britton & Rose (1936:142) Trees, branches glabrescent, aculeate. Nectary petiolar, sessile. Stipules lateral, narrow-triangular. Leaves bipinnate, paripinnate, 8–16–foliolate, leaflets opposite, oblong, venation actinodromous, translucid punctuation absent. Inflorescence glomerule, axillary. Flowers sessile, actinomorphic, polistemonous; calyx gamosepalous, sepals 5, corolla gamopetalous, tubular, whitish, petals 5; androecium dialystaminous, homodinamous, anthers longitudinal; ovary superior, stipitate, pluriovulate. Fruit legume, sessile, linear, plane–corrugate, margin straight, epicarp glabrous, brown. Seeds oblong, plane, coat brown, hilum basal. Examined material:— BRAZIL. Paraíba: Maturéia, Pico do Jabre, 1.197 m elev., 12 April 2019, fl., Aureliana Gomes 2030 (HACAM). Distribution and ecology:— The species is distributed in all regions of Brazil associated with the phytogeographic domains of the Amazon, Caatinga, Cerrado, Atlantic Rainforest and Pantanal in areas of seasonal forest, swamps of altitude and restinga (Barros 2011). Phenology:— Registered with flowers in April. Taxonomic discussion:— Senegalia polyphylla can be recognized, mainly, by the arboreous habit, branches armed with aculeous, petiolar nectaries, bipinnate leaves, and by the inflorescences in axillary glomerule. Among the species of the Mimosoideae clade, we find species with monadelphous androecium and dialystaminous. The representatives of monadelphous androecium belong to the Ingeae tribe, while those with dialystaminous androecium may belong to the Mimoseae or Acacieae tribes. The androceu-related characteristic used to separate species is the number of stamens; the species of Mimoseae are isosstaminous or diplostaminous whereas those belonging to Acacieae have polistaminous flowers. This species is popularly known as angico branco., Published as part of Gomes, Aureliana Santos, Rodrigues, Erimágna De Morais, Moura, Débora Coelho, Melo, José Iranildo Miranda De, Ribeiro, Rayane De Tasso Moreira & Queiroz, Rubens Teixeira De, 2022, Fabaceae Lindl. in a Conservation Unit in the Semi-Arid Region of Paraíba, Brazil, pp. 17-41 in Phytotaxa 555 (1) on page 34, DOI: 10.11646/phytotaxa.555.1.2, http://zenodo.org/record/6875635, {"references":["Candolle, A. P. de (1822) Acacia polyphylla DC. Catalogus plantarum horti botanici monspeliensis 74: 1813.","Barros, M. J. F. (2011) Senegalia Raf. (Leguminosae, Mimosoideae) do Dominio Atlantico, Brasil Dissertacao, Instituto de Pesquisas Jardim Botanico do Rio de Janeiro, Rio de Janeiro."]}

Competition for soil water is one of the major processes that drive the assembly of plant communities, particularly in regions subjected to long dry seasons. The relationship between plant density and soil water competition has strong, but poorly understood, practical implications for population dynamics, restoration and conservation. We planted seedlings of the pioneer legume tree Senegalia polyphylla in containers and assessed the effects of plant density on their resistance to water stress. We completely eliminated the above-ground parts (stem and shoots) of randomly selected plants at 60-days post-planting in order to create three different densities of seedlings. We saturated the soil of the remaining seedlings and then deprived them of additional water until all seedlings died. We assessed the time elapsed from water suppression to wilting and death of individual plants. We found a strong negative relationship between plant density and time to wilting or death. Seedlings survived water stress 80% longer when density was reduced by two-thirds. Planting in lower densities or reducing density by thinning should be considered as strategies to enhance resistance to water stress in drought-prone regions.

rea de concentra??o: Biotecnologia e melhoramento gen?tico florestal. Incluir a Companhia Energ?tica de Minas Gerais S.A. (CEMIG), Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM) e Funda??o de Amparo ? Pesquisa do Estado de Minas Gerais (FAPEMIG) como ag?ncias financiadoras. Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2017-12-18T17:15:46Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) lilian_almeida_brito.pdf: 1387334 bytes, checksum: b11b197308560b439026c5ce3e4ce1fc (MD5) Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2018-01-03T17:04:10Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) lilian_almeida_brito.pdf: 1387334 bytes, checksum: b11b197308560b439026c5ce3e4ce1fc (MD5) Made available in DSpace on 2018-01-03T17:04:10Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) lilian_almeida_brito.pdf: 1387334 bytes, checksum: b11b197308560b439026c5ce3e4ce1fc (MD5) Previous issue date: 2017 Herbicidas com baixo poder de sor??o podem deixar res?duos no ambiente pass?veis de contamina??o em cursos h?dricos. A passagem dos res?duos para os cursos h?dricos pode ser diminu?da ou mesmo anulada por camadas vegetadas, notadamente, em matas ciliares. Contudo, pouca informa??o existe sob os efeitos de herbicidas em esp?cies florestais, principalmente na fase inicial de desenvolvimento. Com esse prop?sito avaliou-se a sensibilidade das esp?cies Senegalia polyphylla (DC.) Britton & Rose (monjoleiro) e Senna macranthera (DC. Ex collad.) H.S. Irwin & Barnaby (fedegoso) a res?duos dos herbicidas ametryn, atrazine, hexazinone e 2,4-D. Para o primeiro cap?tulo adotaram-se doses correspondentes a 0; 12,5; 25 e 50% daquela comercialmente recomendada de ametryn, atrazine e hexazinone em esquema fatorial 3 x 4 x 2 (herbicidas x doses x esp?cies) com quatro repeti??es, conduzidos em blocos ao acaso em casa de vegeta??o com temperatura controlada. Avaliou-se emerg?ncia, ?ndice de Velocidade de Emerg?ncia (IVE), taxa de mortalidade, massa fresca e seca, altura, di?metro, n?mero de folhas, al?m de vari?veis fisiol?gicas obtidas com aux?lio de um analisador a gases no infravermelho (IRGA). No segundo cap?tulo foram instalados dois experimentos paralelos (um por esp?cie) delineados inteiramente ao acaso em esquema fatorial 2 x 4, correspondentes a duas fontes de 2,4-D (produto comercial DMA? ou auxina Sigma-Aldrich? P.A.) e quatro concentra??es (0; 0,1; 1 e 10 mg.L-1 de 2,4-D), com quatro repeti??es e oito r?plicas cada. As esp?cies foram avaliadas quanto ? germina??o, ?ndice de Velocidade de Germina??o (IVG), contamina??o, di?metro, massa fresca e seca. Como resultado, de maneira geral o monjoleiro se mostrou mais sens?vel aos herbicidas, todavia, demonstrou potencial fitorremediador para atrazine. A compara??o entre os tipos de 2,4-D revela que o herbicida n?o pode ser utilizado como regulador de crescimento em laborat?rio, potencialmente devido aos aditivos que apresenta. Por fim, os resultados apontam que o uso recorrente de herbicidas lixivi?veis pr?ximos a fragmentos florestais podem afetar a perpetua??o de esp?cies nativas por efeito delet?rio silencioso. Novas pesquisas precisam ser realizadas com outras esp?cies nativas a fim de conhecer os efeitos dessas e de outras mol?culas ao ecossistema em geral. Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2017. Herbicides with low sorption capacity can leave residues without an environment liable to contamination in water courses. Passage from the residues to the watercourses can be reduced or even negated by layers vegetated, notably in riparian forests. However, scarce information exists about the effects of herbicides on forest species, especially in the early stages of development. For this purpose the sensitivity of the species Senegalia polyphylla (DC.) Britton & Rose (monjoleiro) and Senna macranthera (DC. Ex collad.) H.S. Irwin & Barnaby (fedegoso) to residues of the herbicides ametryn, atrazine, hexazinone and 2,4-D were evaluated. For the first chapter doses corresponding to 0, 12.5, 25 and 50% of that commercially recommended for ametryn, atrazine and hexazinone were adopted in a 3 x 4 x 2 factorial arrangement (herbicides x doses x species) with four replicates, conducted in randomized blocks under controlled temperature greenhouse. It was evaluated the emergence, Emergency Speed Index (IVE), mortality rate, fresh and dry mass, height, diameter, number of leaves, and physiological variables obtained with the aid of an infrared gas analyzer (IRGA). In the second chapter were installed two parallel experiments (one per species) completely randomly delineated in a 2 x 4 factorial scheme, corresponding to two sources of 2,4-D (commercial product DMA? or auxin Sigma-Aldrich? P.A.) and four concentrations (0; 0,1; 1 e 10 mg.L-1 of 2,4-D), with four repletitons and eight replicates each. The species were evaluated for germination, Germination Speed Index (IVG), contamination, diameter, fresh and dry mass. As a result, in general the monjoleiro showed to be more sensitive to herbicides, however, it demonstrated a phytoremediation potential for atrazine. The comparison between the 2,4-D types reveals that herbicide cannot be used as a growth regulator in the laboratory, potentially due to the additives it presents. Finally, the results indicate that the recurrent use of leachable herbicides close to forest fragments can affect the perpetuation of native species by a silent deleterious effect. New research is done for other native species to know the effects of other molecules on the ecosystem in general.