Caracteristicas anatômicas da casca e produção de látex em plantas de seringueira não enxertadas

Abstract

RESUMOAs estruturas envolvidas na produção de látex na seringueira são os laticíferos articulados. O objetivo deste estudo foi descrever aspectos anatômicos da casca em seringueiras não enxertadas com quatro, seis e oito anos, visando à seleção de materiais promissores. O material analisado foi obtido através do corte da casca à altura aproximada de 1,50 m do solo, chegando até o xilema da planta. Os cortes transversais foram preparados de acordo com as técnicas usuais de microtécnica vegetal. Os resultados permitem concluir, que a utilização de caracteres anatômicos (diâmetro das células), da espessura da casca e do diâmetro do caule, visando à seleção dos materiais de pés-francos com idades diferentes, apresentaram uma correlação significativa com a produção de látex.PALAVRAS-CHAVE: anatomia, laticíferos, seringueira, produção, Hevea brasiliensis Anatomic bark characteristics and latex production in non-grafted rubber trees ABSTRACTThe structures involved in latex production in rubber trees are articulated laticifers. The objective of this study was to describe anatomical aspects of the bark in four, six and eight year old non-grafted rubber plants, with the view of selecting materials of high yield potential. The analyzed material was obtained from bark cut around 1.50 m from the soil up to the xylem of the plant. The transversal cuts were prepared according to standard plant microtechniques. Based on the results, we can conclude that the use of anatomical characteristics (cell diameter), bark thickness and shoot diameter for selecting material from rootstocks plus non-grafted plants of different ages, showed a significant correlation with latex production.

Factors that influence in Jatropha curcas L. latex production

“…In the rubber tree, a species with high latex production, lactiferous vessels are articulated (Mesquita and Oliveira 2010). In J. curcas L., a plant with low latex yield, there are different types of lactiferous vessels: articulated anastomosing and non-anastomosing lactifers, and non-articulated branched and non-branched lactifers (Huan-Fang et al 2006).…”

“…Furthermore, the number of lactiferous vessels and their location influence species productivity. In the rubber tree, lactiferous vessels are present in all plant organs, while in the physic nut they are found in larger numbers in the phloem and cortex (Mesquita and Oliveira 2010;Huan-Fang et al 2006). In addition, the physic nut is an oleaginous plant that produces a high percentage of seed oil (35%) and the production of oil, seeds and latex results from intense competition for the same resources arising from photosynthesis.…”