Nitrogen supply associated with rhizobacteria in the first productive cycle of Marandu grass     

Sampaio  Fernando Antônio Rebouças  Teixeira Filho  Marcelo Carvalho Minhoto  da Silva Oliveira  Carlos Eduardo  Jalal  Arshad  Boleta  Eduardo Henrique Marcandalli  de Lima  Bruno Horschut  Rosa  Poliana Aparecida Leonel  Galindo  Fernando Shintate  de Souza  Jeferson Silva 《Journal of Crop Science and Biotechnology》2021,24(4):429-439

Journal of Crop Science and Biotechnology - The rhizobacteria of genus Azospirillum and Bacillus are effective at fixing atmospheric nitrogen, promote plant growth and can largely contribute to...  相似文献   

Boron and zinc inhibit embryonic development,hatching and reproduction of Meloidogyne incognita     

Evelyn Aline Arendt Couto  Juliana Kath  Juliana Aparecida Homiak  Heriksen Higashi Puerari 《Acta Agriculturae Scandinavica, Section B - Plant Soil Science》2016,66(4):346-352

Nematodes have difficult control and complex handling, but considering the physiological and biochemical changes that micronutrients promoting in plants, there is possibility that the supply with these chemicals increases the resistance of plants against nematodes. Thus, the present study aimed to assess the effect of the application of boron and zinc on the reproduction of Meloidogyne incognita, embryonic development and juvenile nematode hatching. Nematode reproduction was evaluated in tomato plant inoculated with 2000 eggs and treated in the aerial part with boron or zinc at the following doses: 0, 1/2, 1×, 2× and 4× the manufacturer's recommendation (100 and 30?g/L, respectively), with the plants assessed 60 days after inoculation. For assessment of embryonic development and juvenile hatching, 1?mL nematode suspension was placed in Petri dishes containing 9?mL of the same doses of boron and zinc, and assessment occurred four and eight days after incubation. Results obtained showed that boron controlled nematode population at the dose of 400?g/L and promoted juvenile hatching when used at maximum dosage on the eighth day. Zinc reduced the number of galls and the number of eggs at the dose of 60?g/L, but did not exhibit direct effect on nematode.  相似文献   

Effects of ethylene and 1-methylcyclopropene (1-MCP) on gene expression and activity profile of alpha-1,4-glucan-phosphorylase during banana ripening     

Mainardi JA  Purgatto E  Vieira A  Bastos WA  Cordenunsi BR  Oliveira do Nascimento JR  Lajolo FM 《Journal of agricultural and food chemistry》2006,54(19):7294-7299

Starch phosphorylases are enzymes that can use starch as substrate, and they are supposed to act in both in starch synthesis and degradation. This paper reports the effects of ethylene and 1-methylcyclopropene (1-MCP) on the degradation of starch and phosphorylase activity and gene expression. The results indicate that phosphorylase activity is induced during ripening and that it is associated with the onset of starch degradation. The regulation of banana phosphorylase activity is mainly dependent on gene expression, and the absence of ethylene perception by 1-MCP had a positive effect. However, this effect can be precluded by increased levels of ethylene, both autocatalytic and exogenous.  相似文献   

Agronomic Evaluation of Legume Cover Crops for Sustainable Agriculture     

Giliane?Aparecida?Vicente?da Silva Souza  Tancredo?Augusto?Feitosa?de SouzaEmail author  Djail?Santos  Elica?Santos?Rios  Gilmara?Juliana?de Lima Souza 《Russian Agricultural Sciences》2018,44(1):31-38

The agronomic characteristics of different legume cover crops and their effects on soil chemical properties were investigated in a short-term field study. We compared weed biomass, nitrogen equivalence, growth rate, leaf chlorophyll content, cover crop biomass, soil total organic carbon, and soil total nitrogen under eight different legume cover crops in a short-term field experiment. We found the highest growth rate, cover crop dry biomass, N plant content, and N contribution with C. ochroleuca plants, whereas for leaf chlorophyll content, soil organic carbon, and total nitrogen the highest values were found with M. pruriens. We did not find any significant difference among C. ochroleuca and M. pruriens for cover crop dry biomass. Our findings suggest that the incorporation of cover crops into the soil can change positively the soil chemical properties, such as soil organic carbon and total nitrogen. Our results also highlight the importance of considering the short-term effect of cover crops on the tropical soil fertility maintenance, in this case, Regosol.  相似文献   

Microbial biomass as an antioxidant for tilapia feed          下载免费PDF全文

Thiago Luís Magnani Grassi  Dayse Lícia Oliveira  Natália Mingues Paiva  Juliana Campos Pereira Diniz  Anelise Maria Bosco  Ariana Aparecida Ferreira Pereira  Amanda Regina Pinatti Menezes  Taiana Carvalho Valadares  Rosemeire Conceição Parra Pastor  Paulo César Ciarlini  Giovani Sampaio Gonçalves  Morris Villarroel  Elisa Helena Giglio Ponsano 《Aquaculture Research》2018,49(8):2881-2890

Microbial biomass (MB) produced by different industries is thought to be a beneficial supplement in fish feed due to high contents of antioxidants and pigments. However, little is known about their impact on fish health. In this experiment, 960 tilapia (26.84 ± 1.03 g) were fed one of eight experimental diets—a control diet with no MB (C), a control diet with vitamin E (VE) and six diets with three types of MB at two concentrations (0.25% and 0.5%): Rubrivivax gelatinosus (RG25 and RG50), Spirulina platensis (SP25 and SP50) and Saccharomyces cerevisiae (SC25 and SC50). Adding MB to diets decreased plasma total oxidant status, malonaldehyde and leucocyte respiratory burst; increased the total antioxidant status; and did not affect the blood biochemical parameters. In flesh, the use of the MB lowered the thiobarbituric acid‐reactive substances and increased redness (except for SC) and carotenoid deposition (except SC25). So, it was concluded that the use of the MB provided an antioxidant effect in tilapia blood plasma, decreased lipid oxidation and increased pigmentation and carotenoid deposition in the fish flesh, without imparting a negative impact on the animals’ health.  相似文献   

Functional and Structural Characterization of FAU Gene/Protein from Marine Sponge Suberites domuncula     

Dragutin Perina  Marina Korolija  Marijana Popovi? Had?ija  Ivana Grbe?a  Robert Belu?i?  Mirna Ime?ek  Christine Morrow  Melanija Posavec Marjanovi?  Tatjana Bakran-Petricioli  Andreja Miko?  Helena ?etkovi? 《Marine drugs》2015,13(7):4179-4196

Finkel-Biskis-Reilly murine sarcoma virus (FBR-MuSV) ubiquitously expressed (FAU) gene is down-regulated in human prostate, breast and ovarian cancers. Moreover, its dysregulation is associated with poor prognosis in breast cancer. Sponges (Porifera) are animals without tissues which branched off first from the common ancestor of all metazoans. A large majority of genes implicated in human cancers have their homologues in the sponge genome. Our study suggests that FAU gene from the sponge Suberites domuncula reflects characteristics of the FAU gene from the metazoan ancestor, which have changed only slightly during the course of animal evolution. We found pro-apoptotic activity of sponge FAU protein. The same as its human homologue, sponge FAU increases apoptosis in human HEK293T cells. This indicates that the biological functions of FAU, usually associated with “higher” metazoans, particularly in cancer etiology, possess a biochemical background established early in metazoan evolution. The ancestor of all animals possibly possessed FAU protein with the structure and function similar to evolutionarily more recent versions of the protein, even before the appearance of true tissues and the origin of tumors and metastasis. It provides an opportunity to use pre-bilaterian animals as a simpler model for studying complex interactions in human cancerogenesis.  相似文献   

Resistance to the South American tomato pinworm <Emphasis Type="Italic">Tuta absoluta</Emphasis> in high acylsugar and/or high zingiberene tomato genotypes     

Wilson Roberto Maluf  Vanisse de Fátima Silva  Maria das Graças Cardoso  Luiz Antonio Augusto Gomes  Álvaro Carlos Gonçalves Neto  Gabriel Mascarenhas Maciel  Daniela Aparecida Castro Nízio 《Euphytica》2010,176(1):113-123

Zingiberene (ZGB) and acylsugars (AS) are allelochemicals responsible for high levels of arthropod resistance found in Solanum habrochaites (= Lycopersicon hirsutum) var. hirsutum ‘PI 127826’ and S. (= L.) pennelli ‘LA 716’, respectively. These accessions were used to develop commercial lines with good levels of pest resistance. The objective of the present work was to assess the ZGB and AS contents and the levels of resistance to Tuta absoluta in tomato hybrids between high ZGB × high AS lines, as compared with their parental lines and with commercial checks. High AS homozygous lines [TOM-688 and TOM-689, both originated from the interspecific cross S. lycopersicum (= L. esculentum) × S. pennelli], high ZGB homozygous lines (ZGB-703 and ZGB-704, both derived from the interspecific cross S. lycopersicum × S. habrochaites var. hirsutum), double heterozygotes for both ZGB and AS, single heterozygotes for ZGB, and single heterozygotes for AS were assessed for AS and ZGB contents. Low-ZGB low-AS checks ‘Débora Max’ and ‘TOM-684’ were used, as well as checks with high ZGB (PI 127826) and high AS (LA 716). The genotypes were submitted to infestation with South American tomato pinworm adults in a screenhouse, and oviposition counts were taken 10 days after the initial infestation date. Plants were scored for overall plant damage and percent leaflets attacked up to the 38th day after infestation. Genotypes heterozygous for ZGB or AS showed allelochemical contents intermediate to those of their high and low content parents, indicating incompletely dominant gene action for contents of each of the allelochemicals. There were no significant differences in T. absoluta oviposition between high-AS homozygous genotypes, high-ZGB homozygotes, single heterozygotes for AS, single heterozygotes for ZGB and double heterozygotes for ZGB and AS, but all these genotypes showed egg counts significantly lower than the low-ZGB low-AS checks. Feeding damage of T. absoluta was higher in the low-ZGB low-AS checks than in any other ZGB-rich or AS-rich tomato genotype. Relative to ZGB or AS single heterozygotes, the heterozygotes for both ZGB and AS showed higher levels of resistance to the insect, as measured by overall plant damage, indicating a synergic effect of the allelochemicals on resistance.  相似文献   

Use of plant extracts in the control of common bean anthracnose     

Joyce Mendes Andrade Pinto  Elaine Aparecida Souza  Denilson Ferreira Oliveira 《Crop Protection》2010

Three hundred (300) methanol extracts of barks, leaves, flowers and stems of 200 plant species from Alto Rio Grande and Vale do São Francisco regions, State of Minas Gerais, Brazil, were prepared and submitted to an in vitro growth test with the fungus Colletotrichum lindemuthianum, causal agent of anthracnose in common bean. Extracts from 13 plant species (Astronium fraxinifolium, Inga marginata, Malva sylvestris, Matayba elaeagnoides, Miconia argyrophylla, Myrcia fallax, Ocimum gratissimum, Origanum vulgare, Rollinia emarginata, Siparuna arianeae, Styrax pohlii, Tabebuia serratifolia and Trichilia pallida) presented antifungal activity and were used in other in vitro assays. Extracts from M. argyrophylla, M. fallax, O. vulgare, S. arianeae and S. pohlii were the most promising for the inhibition of the mycelial growth while the extracts of M. argyrophylla, M. elaeagnoides and O. gratissimum presented the best results for the inhibition of conidial germination. Under greenhouse conditions, the extracts of M. argyrophylla and O. vulgare caused the greatest reductions (41.82% and 37.65%, respectively) in disease severity when a local effect assay was carried out. In the systemic effect assay, also in a greenhouse, the most promising extracts were those from I. marginata, M. argyrophylla, M. fallax, M. sylvestris, O. gratissimum, O. vulgare and S. arianeae, which reduced the severity of the anthracnose to values below 35% of the observed for the control. Therefore, future studies with these plant species should be carried out to develop new products to control the common bean anthracnose.  相似文献   

Potential of terracing to reduce glyphosate and AMPA surface runoff on Latosol     

Exterkoetter  Ronan  Rozane  Danilo Eduardo  da Silva  Walquiria Chaves  Toci  Aline Theodoro  Cordeiro  Gilcelia Aparecida  Benassi  Simone Frederigi  Boroski  Marcela 《Journal of Soils and Sediments》2019,19(5):2240-2250

Journal of Soils and Sediments - Glyphosate is the world’s most used herbicide and monitoring glyphosate in the environment is a relevant topic. The present study aims to develop a...  相似文献   

Effect of Marcela Extract (Achyroclines satureiodes) on the Shelf Life of Minced Tilapia (Oreochromis niloticus) Sausages     

Silvério Nepomuceno de Lima  Cintia Cristina de Oliveira  Edevane Alves Castilho  Karina Aparecida Damasceno  Patrícia Leal de Almeida  Simone Cristina de Oliveira 《Journal Of Aquatic Food Product Technology》2017,26(2):140-147

The effect of marcela extract (ME) on the shelf life of minced tilapia sausages was evaluated in this study. The level of phenolic compounds in the ME was 114.1 ± 2.9 mg GAE/g extract, and the DPPH free radical scavenging activity was 94.95 ± 1.34%. The ME protected the samples from color changes during storage. The addition of 0.5 and 0.75% ME significantly decreased lipid oxidation and microbial growth. The ME did not impact the sausages’ sensory quality, and the addition of 0.75% prevented sensory rejection during storage.  相似文献