The methodology developed in this study through the acquisition of fingerprint chromatograms by liquid chromatography-diode array detector (LC-DAD), aided by principal component analysis, made it possible to assess, in a rational way, the chemical differences between six accessions of Lippia alba and to verify the influence of the method of extraction, the seasonality and the individuality of each accession on chemical composition of its extracts. Among all extracts analyzed against cancer cell lines, eight of them showed to be more promising against a human leukemia cell line (HL-60), displaying cell growth inhibition percentage ranging between 40.0 and 52.0%. In the inhibitory activity assays against acetylcholinesterase enzyme, all extracts showed weak inhibitory effect, with highlight only for six of them, which displayed inhibition ranging between 27.0 and 32.0%.

RESUMO A batata-doce (Ipomoea batatas) se propaga essencialmente por multiplicação vegetativa, e por isso pode apresentar acessos duplicados em bancos de germoplasma. O objetivo do presente trabalho foi realizar a caracterização morfológica e agronômica de germoplasma de batata-doce do Banco Ativo de Germoplasma (BAG) da Universidade Federal de Sergipe (UFS). O experimento foi conduzido na Fazenda Experimental “Campus Rural da UFS”. O delineamento experimental utilizado foi de blocos casualizados, testando 73 acessos de batata-doce, com duas repetições e quatro plantas por parcela. Foram avaliadas características morfológicas e agronômicas da parte aérea e das raízes. Observou-se que o tipo de lóbulo da folha, o número de lóbulos por folha, a forma do lóbulo central e a forma geral da folha foram as características que mais proporcionaram variabilidade entre os acessos. Para danos causados por insetos de solo, 52 acessos apresentaram-se como tolerantes. Os acessos apresentaram variação entre 0,33 e 2,71 t/ha, para massa seca da parte aérea, e entre 1,20 a 10,89 t/ha, para produtividade total de raízes, e de maneira geral, os acessos apresentaram grande variabilidade fenotípica apontando perspectivas para um programa de melhoramento genético desta cultura.

ABSTRACT Sweet potato (Ipomoea batatas) spreads mainly by vegetative propagation, and therefore this vegetable may have duplicate accessions in germplasm banks. The authors aimed to characterize morpho-agronomically the sweet potato germplasm from the Active Germplasm Bank (AGB) of Universidade Federal de Sergipe (UFS).The experiment was carried out at the Research Farm “Campus Rural da UFS”. The experimental design was a randomized block design, testing 73 sweet potato accessions with two replicates and four plants per plot. Morpho-agronomic traits of aboveground part and roots were evaluated. We observed that the leaf lobe type, the number of lobes per leaf, shape of central lobe, and general leaf shape were traits which provided the most variability among the accessions. For damage caused by soil insects, 52 accessions showed tolerance. The accessions presented a range from 0.33 to 2.71 t/ha for dry mass of aboveground part and from 1.20 to 10.89 t/ha for the total productivity of the roots. The high phenotypic variability of this crop shows good prospect for breeding programs.

O objetivo do presente trabalho foi avaliar o desempenho de clones de batata-doce cultivados em diferentes períodos. O delineamento experimental foi de blocos casualizados, em esquema de parcelas subdivididas, com três repetições. Foram testados nas parcelas três períodos de cultivo (3, 5 e 7 meses), e nas subparcelas, cinco clones de batata-doce (acessos IBP-007, IBP-038, IBP-075, IBP-079 e IBP-149), e a cultivar comercial Brazlândia Rosada. As variáveis analisadas foram sobrevivência, danos causados por insetos de solos (notas de 1 a 5 onde 1= sem danos e 5= muitos danos, sem valor comercial), massa fresca e seca de parte aérea, produtividade total de raízes. Os maiores danos causados por insetos de solo observou-se no clone IBP-007 (4,29), e menores danos nos clones IPB-038 (2,84), IPB-075 (3,01) e IPB-149 (2,88), que apresentaram resistência no cultivo durante sete meses. O clone IPB-007 apresentou elevados valores de massa fresca (14,07 t/ha) e seca (2,81 t/ha) de parte aérea, em todos periodos de cultivo, apresentando também, alta produtividade de raizes (33,16 t/ha). Recomenda-se cultivar a batata doce durante um período de cinco meses.

The aim of this work was to evaluate the performance of sweet potato clones grown in different cultivation periods. The experimental design was a randomized block design, in a split-plot scheme, with three replications. Tests in the plots were three cultivation periods (3, 5 and 7 months), and in the split plots, five sweet potato clones (accessions IBP-007, IBP-038, IBP-075, IBP-079 and IBP-149), and the commercial cultivar Brazlândia Rosada. The studied variables were: survival, damages caused by soil insects (grades from 1 to 5 being 1= without damage and 5= very damaged, without commercial value), fresh and dry weight of the shoots, total root yield. The greatest damages caused by soil insects were observed on the clone IBP-007 (4.29) and the smallest damages were observed on the clones IPB-038 (2.84), IPB-075 (3.01) and IPB-149 (2.88) which presented resistance during the seven month cultivation period. Clone IPB-007 presented high values of fresh (14.07 t/ha) and dry weight (2.81 t/ha) of aboveground part in all the cultivation periods. Clone IPB-007 also presented high root yield (33.16 t/ha). We recommend the use of the cultivation period of five months.