Impacto da exploração madeireira na diversidade genética e área basal de jatobá na Amazônia sul-ocidental

Silva, S. M. M.; Wadt, L. H. de O.; Mesquita, A. G. G.; Martins, Karina

doi:10.18671/scifor.v44n111.01

Cited by 8 publications

(7 citation statements)

References 32 publications

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“…The species Hymenaea courbaril L. (Fabaceae), known as Jatobazeiro, plays essential ecological roles such as carbon sequestration and structuring of degraded areas (SALOMÃO et al, 2019). In addition to these ecological functions, this species is of economic interest because it provides a large volume of wood used in various production chains (COSTA et al, 2011;SILVA et al, 2016). The extraction of wood from H. courbaril causes forest fragmentation that results in a decrease in the genetic variability of populations.…”

Section: Introductionmentioning

confidence: 99%

PROTECTED ENVIRONMENTS AND REFLECTIVE MATERIAL IN THE PRODUCTION OF Hymenaea courbaril SEEDLINGS

Souza¹,

Silva²,

Costa³

et al. 2022

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Most seedling production is carried out in protected environments influencing plant growth and development. The present study aimed to evaluate types of the cover of protected environments and reflective material in the production of seedlings of Hymenaea courbaril. The experiments were carried out in four protected environments: (A1) agricultural greenhouse covered with low-density polyethylene (LDPE) film with 42% - 50% shading screen under the film; (A2) agricultural screen with an aluminized screen with 35% shading; (A3) agricultural screen with a black screen of 30% of shading, and (A4) agricultural screen with a black screen of 18% of shading. Production systems were tested with and without reflective material on the cultivation bench in each protected environment. The photosynthetically active radiation reflecting material used was the aluminized screen (Aluminet®). As there were no repetitions of the protected environments, each environment was considered an experiment. In each environment, the experimental design used was completely randomized, with four replications and five plants per plot. Among the variables analyzed, it was observed that the agricultural screen with a black screen (18% of shading) presented better quality seedlings. The system with reflective material presented higher values of the number of leaves and stem diameter.

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Section: Introductionmentioning

confidence: 99%

PROTECTED ENVIRONMENTS AND REFLECTIVE MATERIAL IN THE PRODUCTION OF Hymenaea courbaril SEEDLINGS

Souza¹,

Silva²,

Costa³

et al. 2022

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“…Jatoba (Hymenaea courbaril L., family Fabaceae) is a tropical tree species that occurs naturally in several Brazilian biomes (Silva et al, 2016). Jatoba is mainly used in the timber sector, but other minor uses are also attributed to the species (Gonzaga et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Because of Jatoba's high exploitation rate, its reserves are decreasing, which may lead to its extinction (Silva et al, 2016). It is therefore important to propagate this species on a large scale to ensure a sustainable supply of raw materials in the future.…”

Section: Introductionmentioning

confidence: 99%

Root pruning and Osmocote® provides better Jatoba seedlings

Amorin¹,

Faller²,

Oliveira³

et al. 2020

Científica

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The species Hymenaea courbaril L. (Jatoba) is widely used in the timber industry. However, its population was reduced due to high exploitation rate, being at risk of extinction. Therefore, production of seedlings of this species should be improved to meet the demand of reforestation programs. Given the above, this study evaluates the effect of Osmocote ® rates and root pruning on the growth of Jatoba seedlings transplanted into plastic bags. A randomized complete block design was used in a 5 x 3 factorial scheme, corresponding to five rates of Osmocote ® fertilizer (0.0; 2.0; 4.0; 6.0; and 8.0 g L-1) and three root pruning intensities (0%; 25%; and 50%). At 105 days after transplantation, the following were evaluated: plant height, stem diameter, number of leaves, shoot dry weight, root dry weight, total dry weight, height/stem diameter ratio, and Dickson quality index. Rates below 4.0 g L-1 or above 6.0 g L-1 decreased seedling quality. The most prominent variables in this study were plant height, total dry weight, and number of leaves of H. courbaril seedlings. Osmocote ® rates between 4.4 and 6.6 g L-1 combined with 25% root pruning provided the best results for the growth of transplanted Jatoba seedlings.

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“…Estimating diversity depends on a variety of indices that represent the informative content of a site. Such an estimate may have different applications, such as individual identification and kinship analysis, estimation of gene flow, definition of the crossing-breeding system, and determination of spatial genetic structure (Sujii et al 2015, Silva et al 2016, Zhu et al 2016, Nilkanta et al 2017. For most species of Guadua, few studies on the genetic diversity and structure have been conducted.…”

Section: Introductionmentioning

confidence: 99%

Genetic structure and diversity of native Guadua species (Poaceae: Bambusoideae) in natural populations of the Brazilian Amazon rainforest

Silva

Martins

Costa

et al. 2020

An. Acad. Bras. Ciênc.

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The Southwestern Region of the Brazilian Amazon is formed by forests dominated by bamboos. The genus Guadua is endemic to the Americas, and little is known about the genetic diversity and structure of species of this genus. This study aimed to evaluate the genetic diversity and structure of two native Guadua species in natural populations in the Southwestern region of the Brazilian Amazon. Therefore, the genetic diversity and structure of Guadua aff. chaparensis and Guadua aff. lynnclarkiae were evaluated with the use of microsatellite molecular markers (SSR). It was verified that the average genetic diversity for the populations studied was considered high (=0.5) compared to other species of bamboo. All populations had rare and private alleles, and none of them presented significant values of inbreeding. The populations were divergent (ST Ĝ = 0.46), resulting in a low apparent gene flow. The Bayesian analysis showed that among the 350 individuals analyzed, five groups (K=5) were formed, with little similarity among the groups (Populations), although two of them presented clonal individuals. According to the results obtained, it can be conclude that populations should be treated as having unique characteristics, mainly when accessed for management and for in situ and ex situ conservation studies.

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Impacto da exploração madeireira na diversidade genética e área basal de jatobá na Amazônia sul-ocidental

Cited by 8 publications

References 32 publications

PROTECTED ENVIRONMENTS AND REFLECTIVE MATERIAL IN THE PRODUCTION OF Hymenaea courbaril SEEDLINGS

PROTECTED ENVIRONMENTS AND REFLECTIVE MATERIAL IN THE PRODUCTION OF Hymenaea courbaril SEEDLINGS

Root pruning and Osmocote® provides better Jatoba seedlings

Genetic structure and diversity of native Guadua species (Poaceae: Bambusoideae) in natural populations of the Brazilian Amazon rainforest

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