O papel da comunidade de fungos micorrízicos arbusculares (FMA) autóctones no desenvolvimento de espécies vegetais nativas em área de dunas de restinga revegetadas no litoral do Estado da Paraíba

Abstract

-(Role of autoctone community of arbuscular mycorrhizal fungi (AMF) on the development of native plant species in revegetated restinga dunes from coastal region of Paraíba State). Association of arbuscular mycorrhizal fungi (AMF) and plant roots constituted one of the most important ways to mitigate the impact of disturbed area. The aim of this work was to characterize the AMF community in the soil from revegetated dune area and to analyze its infl uence on the native plant development. Soils were collected in rainfall season in the revegetated area. Glomalin-related soil protein production (GRSP), glomerospores density and diversity were evaluated. The infl uence of AMF autoctone community was determined for two native plants: Tabebuia roseo-alba (Ridl.) Sandw. (peroba) and Tocoyena selloana Schum. (jenipapo-bravo). Experimental design for each species was completely randomized with 10 replicates, two treatment -native soil (SN) and disinfested native soil (SND) -were tested. Parameters evaluated were: height, shoot diameter, leaf number and area, shoot and root dry mass, nutrient contents, glomerospore density, mycorrhizal colonization and glomalin-related soil protein production (GRSP). In dune revegetated soil was found 1 glomerospore g -1 soil and 1.20 ± 0.04 mg GRSP g -1 soil, and six AMF species were identifi ed. Native soil promoted more development to plant and fungi. Mycorrhizal colonization in peroba was 80% and in jenipapobravo 60%. Then, AMF are present in revegetated area after mining contributing to growth of native plant species studied in greenhouse conditions, suggesting that their performance is affected by arbuscular mycorrhiza symbiosis.Key words -arbuscular mycorrhiza, native plant species, restinga RESUMO -(O papel da comunidade de fungos micorrízicos arbusculares (FMA) autóctones no desenvolvimento de espécies vegetais nativas em área de dunas de restinga revegetadas no litoral do Estado da Paraíba). A simbiose entre fungos micorrízicos arbusculares (FMA) com raízes de plantas vasculares constitui uma das mais importantes formas de mitigar o impacto das áreas pertubadas. O trabalho objetivou caracterizar a comunidade de FMA presente no solo de área de duna revegetada e avaliar sua infl uência sobre o desenvolvimento de espécies nativas. Foi realizada coleta de solo durante o período chuvoso em área revegetada, avaliando-se: produção de proteínas do solo relacionadas à glomalina (PSRG), densidade e diversidade de glomerosporos. A infl uência da comunidade nativa de FMA foi determinada para duas espécies vegetais nativas: Tabebuia roseoalba (Ridl.) Sandw. (peroba) e Tocoyena selloana Schum. (jenipapo-bravo). Para cada espécie foram testados dois tratamentos -solo nativo (SN) e solo nativo desinfestado (SND) -em delineamento inteiramente casualizado com 10 repetições. Ao fi nal foram avaliados: altura, diâmetro do caule, número de folhas, área foliar, biomassa seca e conteúdo de nutrientes nas partes aérea e radicular, densidade de glomerosporos, colonização micorrízica hifálica, ar...

Arbuscular mycorrhizal fungi activity in Haplic Luvisol on the semi-arid region of Pernambuco Brazil

“…Santos et al (2014) investigated the influence of seasonality on the average number of AMF glomerospores (average density = 9.9 ± 0.6 glomerospores g -1 soil) in the liana forest fragment studied (Vitória da Conquista-BA), justifying that the AMF, too, are influenced by various environmental factors. Oliveira et al (2009), studying the soil of a dune mining area with reforested restinga in the Paraíba coast, quantified 50 glomerospores 50 g soil -1 , a figure considered low when compared to the present study, or compared to other works in native area as previously mentioned. Silva et al (2001) found, in areas of native caatinga and degraded by mining, a glomerospore level always below 160 glomerospores 100 g soil -1…”

Biological and chemical attributes of soils under forest species in Northeast Brazil

“…Silva et al (2014) noted some factors which could be related to the production or deposition of this protein by the AM fungi in plantations and in non-forested areas. These include climate, soil biota, concentrations of nutrients, the diversity of AM fungi, as well as the host and its productivity (Oliveira et al 2009;Silva et al 2012).…”

Comunidade de fungos micorrízicos arbusculares: diversidade, composição e glomalina em área revegetada com sesbânia

“…Os fatores que estão relacionados ao controle da produção de PSRG pelos FMAs nos diferentes ambientes ainda não foram completamente esclarecidos; no entanto, o clima, a biota do solo, as concentrações de nutrientes e, possivelmente, a diversidade de FMAs, bem como o hospedeiro e sua produtividade podem inûuenciar a deposição dessa proteína no solo (Rillig et al, 2001;Oliveira et al, 2009;Silva et al, 2012).…”