Made available in DSpace on 2014-12-17T15:54:53Z (GMT). No. of bitstreams: 1 AnaKOA_DISSERT.pdf: 1986200 bytes, checksum: d86826aeca9a3190905fe12b68562cd9 (MD5) Previous issue date: 2010-02-25 / The anthropical action caused destruction of great part of the Atlantic forest remaining today around 7% to 8% of the original portion. A classical example of the degradation is the situation of the Pau-Brasil (Caesalpinia echinata Lam.) which appellant exploration summarized abruptly decreased the wild occurrence of the species. Besides the economic exploration and the threat of extinction, the plant shows some characteristics that its own physiology makes difficult the survival in natural conditions. For this reason, any strategy developed to conserve it should also guarantee ways for its multiplication. In these conditions, the only reasonable technology is micropropagation in vitro based on immature segments of Catullus (explants or internodes). However, in virtue of the threat of extinction, extractivism and fenology, the disponibility of the sources of explants are reduced. Then, to turn this around, the present research showed the hypothesis that arrange these explants would have as a solution to elaborate a bank of matrixes and the utilization of produced seedlings as source of explant. Then, assuming that the soil is a fundamental element for a good formation of the seedlings, there were tests in a greenhouse on the Laboratory of plant biotechnology at UFRN, from May to June of 2008 that showed the influence of the four different soils on the production of Pau-Brasil. The objective of this work was to make possible the seedlings production of the specie and from them to establish a bank of matrixes as source of explant to guarantee the continuity of the process of micropropagation, contributing with the preservation of the specie / A a??o antr?pica causou a destrui??o de grande parte da Mata Atl?ntica restando hoje apenas cerca de 7% a 8% da sua por??o original. Um exemplo cl?ssico dessa degrada??o ? a situa??o do Pau-Brasil (Caesalpinia echinata Lam.) cuja explora??o recorrente resumiu drasticamente a ocorr?ncia silvestre da esp?cie. Al?m da explora??o econ?mica e da amea?ada de extin??o, a planta apresenta ainda caracter?sticas de sua pr?pria fisiologia que dificultam a sobreviv?ncia em condi??es naturais. Por esse motivo, qualquer estrat?gia desenvolvida para conserv?-la deve tamb?m garantir meios para sua multiplica??o. Nessas condi??es, a ?nica tecnologia plaus?vel ? a micropropaga??o in vitro a partir de segmentos imaturos de caule (os explantes). Entretanto, em virtude da amea?a de extin??o, do extrativismo e da fenologia, a disponibilidade das fontes de explante ? reduzida. Ent?o, para contornar esse contratempo, a presente pesquisa trabalhou a hip?tese de que para dispor desses explantes a solu??o seria elaborar um banco de matrizes e utilizar as mudas produzidas como fonte de explante. Ent?o, partindo do pressuposto de que o substrato ? um elemento fundamental para boa forma??o de mudas, testou-se em casa de vegeta??o do Laborat?rio de Biotecnologia Vegetal da UFRN, no per?odo de maio a junho de 2008, a influ?ncia de quatro diferentes substratos sobre a produ??o plantas de Pau-Brasil. O objetivo aqui foi viabilizar a produ??o de mudas da esp?cie e a partir das mesmas estabelecer um matrizeiro como fonte de explante para garantir a continuidade do processo de micropropaga??o, contribuindo assim com a preserva??o da esp?cie