MICORRIZAÇÃO E CRESCIMENTO DE PROGÉNIES DE Hymenaea stignocarpa Mart. ex. Hayne EM SUBSOLO DE ÁREA DEGRADADA.

Faria, Tiago Mendes; Scabora, Márcia Helena; Maltoni, Kátia Luciene; Cassiolato, Ana Maria Rodrigues

In tropical ecosystems, little is known about the relationship between arbuscular mycorhizal fungi (AMF) and the host genetic variability, especially among tree species. This study aimed to examine the response of 19 progenies of jatoba-do-cerrado (Hymenaea stignocarpa Mart. Ex. Hayne) inoculated with AMF, the root colonization and seedlings early growth were evaluated, growing in cultivated in subsoil from the "loading area", under greenhouse conditions. The seedlings, germinated in the laboratory, were transferred to plastic bags containing subsoil and sand mixture (4:1). For the inoculation, each replicate received 100 g of soil (with about 48 spores of AMF) from a preserved "Cerrado" area, to reintroduce microorganisms. After 120 days, the mycorrhiza colonization (COL), the number of spores of AMF, the plant height (PH), the weight of shoot dry matter (SDM) and the root fresh matter (RFM) were assessed. The highest values of COL, SDM and RFM were observed in the progenies JC7, JC18, JC29, JC27 and JC14; the JC7 and JC18 also increased number of spores. There were significant and positive correlations between COL and the others variables (AP, NE, R.FM and SDM, and between R.FM and other variables (NE, AP and SDM). The conclusion is that, there is variability among the genotypes of Hymenaea stignocarpa growth (AP MFSR and DMAP) and mycorrhization (COL and NE), with emphasis on two progenies (JC7 and JC18), that showed the highest values, which can be resulted of a greater affinity to strains of AMF- soil inoculum.

HYMENAEA; TREE growth; TIMBER; PLANT roots; SUBSOILS; GREENHOUSES; PLANT shoots

Ciência Florestal (01039954), 2013, Vol 23, Issue 1, p233

0103-9954

Academic Journal

10.5902/198050988457