Análise transcriptomica e proteômica de sementes de cajueiro (Anacardium occidentale L.) visando aplicações biotecnológicas

Abstract

The cashew (Anacardium occidentale L.) is an important Brazilian plant species occurring especially in the northeast region. In nature, there are basically two types of cashew, the common also known as giant, and dwarf cashew which show low size and precocity for fruit production. The fruit of the cashew (cashew-nut) is a source of lipids and proteins, it has been utilized to food in the world. However, the sub-product commercialization of cashew-nut had shown special attention by presence of allergenic proteins. Futhermore, the potentialities of the cashew use are limited due to lack of molecular data. Thus, the present study aimed to establish an overview about transcripts and proteins from cashew-nut through transcriptome and proteome analysis. For this purpose, seeds of the common and dwarf CCP 76 cashew in maturation were used to obtain messenger RNA. After sequencing by Illumina platform with 4x average coverage, we obtained sequences with Phred score above 30. The transcriptome assembly revealed 37,422 and 77,371 contigs, relative to complementary DNA fragment of seeds of the common and dwarf CCP 76 cashew, respectively. The percentage of transcriptome sequences identified by BLAST varied of 15.2 to 45.9% for CCP 76 and common cashew, respectively. The comparative analysis between the two genotypes allowed the identification of tree new polymorphic microsatellites. Additionally, the proteome analysis of seed quiescent of both common cashew and dwarf CCP 76, CCP 09, BRS 226 e BRS 275 genotypes showed presence of six different expressed proteins. In summary, transcriptome and proteome analysis contributed to addition of new molecular data for A. occidentale L., as well as allowed the identification of possible marks with high biotechnological potential.