A pesquisa da mixobiota da Área de Preservação Permanente Mata do Pau Ferro - APPMPF (6º58'12"S e 35º42'15"W, 400-650 m de altitude, 600 ha), enclave de Floresta Atlântica situado no semi-árido paraibano, permitiu que fossem efetuados 11 novos registros de Myxomycetes para o Estado da Paraíba: Cribraria mirabilis (Cribrariaceae); Licea biforis (Liceaceae); Dictydiaethalium plumbeum,Lycogala exiguum (Reticulariaceae); Macbrideola scintillans,Stemonaria longa, Stemonitis axifera,S. smithii (Stemonitaceae); Metatrichia floriformis,Perichaena chrysosperma, Trichia affinis (Trichiaceae). M. scintillans está sendo assinalada pela primeira vez para o Brasil e M. floriformis para a Região Nordeste. São fornecidas, para cada espécie, descrições baseadas no material coletado na APPMPF e a distribuição geográfica no Brasil é indicada com base na literatura.
This research aims to analyze the effect of the extract from a native plant from Caatinga, Allamanda blanchetti, in the induction of resistance mechanisms in a sugarcane variety smut-susceptible. Initially, it carried out a phytochemical analysis to know the main plant compounds used in this study. Diverse chemicals content in ethanolic extract from A. blanchetii were detected by thin-layer chromatography (TLC). Flavonoids, were more abundant compounds following by terpenes, stereroids and saponins. Under greenhouse conditions the sugarcane plants, SP-791011 (smut-susceptible), were sprayed with extracts from A. blanchetti extracted at cold at concentrations of 1000 ppm and acilbenzolar-S-metil (ASM) (100 mg/L). Leaves were collected at 0, 24 and 48 hours after spraying and used in the RT-PCR analysis for to identify the defense gene expression. Change in gene expression were observed in the different treatments, especially in the expression of pathogenesis-related (PR) genes. The extract of A. blanchetti induced an increase in the glucanase expression and was more effective than ASM inducer. SNPR1 gene show increased in the two treatment. The results indicate that A. blanchetti extracts was able to activate the resistance mechanism as observed in resistant plants. This paper is the first report about the use of Caatinga natural plant extracts inducing resistance genes against Sporisorium scitamineum in sugarcane susceptible genotype.
A presente pesquisa é resultado da interação no eixo de produção vegetal III, cuja as disciplinas que compõem são: Culturas indústrias I, fruticultura e produção de grãos, o objetivo do presente trabalho foi realizar um compilado das principais doenças que afetam a cultura do algodoeiro já descritas na literatura, através de revisão bibliográfica, a qual foi verificado as seis doenças de maior impacto na produção da cultura como:
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