scholarly journals Allelochemical Activity of Eugenol-Derived Coumarins on Lactuca sativa L.

Plants ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 533 ◽  
Author(s):  
Kamilla Pacheco Govêa ◽  
Rafaella Sueko Tomita Pereira ◽  
Mateus Donizetti Oliveira de Assis ◽  
Pâmela Ingrid Alves ◽  
Guilherme Andrade Brancaglion ◽  
...  
Keyword(s):  
Lactuca Sativa ◽  
Chromosomal Abnormalities ◽  
Antioxidant Enzyme Activity ◽  
Shoot Length ◽  
Antioxidant Metabolism ◽  
Fresh Biomass ◽  
Natural Herbicides ◽  
Lactuca Sativa L ◽  
First Time ◽  
Potential Use

Coumarins are widely distributed substances in plant species that promote phytotoxic effects, allowing them to be exploited as herbicides less harmful to the environment, since many invasive species have demonstrated resistance to commercially available products. The derived coumarins used in this study had not been tested in plant models and their effect on plants was unknown. The objective of this study was to evaluate the phytotoxic action of these coumarins in bioassays with Lactuca sativa L., in order to select the most responsive substance whose toxicity was best elucidated by chromosomal complement and enzymatic antioxidant metabolism studies. From the phytotoxicity assays, coumarin 8-methoxy-2-oxo-6-(prop-2-en-1-yl)-2H-chromene-3-carboxylic acid (A1), reported here for the first time, was selected as the most responsive and caused a reduction in the following parameters: number of normal seedlings, fresh biomass, root length and shoot length. Subsequent studies demonstrated that this coumarin is cytogenotoxic due to damage caused to the cell cycle and the occurrence of chromosomal abnormalities. However, it did not interfere with antioxidant enzyme activity and did not cause lipid peroxidation. The changes caused by coumarin A1 described herein can contribute to better understanding the allelochemical actions of coumarins and the potential use of these substances in the production of natural herbicides.

scholarly journals Assessing phytotoxicity and accumulation of trace elements to Lactuca sativa of a contaminated shooting range soil

2021 ◽  
Author(s):  
Jūratė Česynaitė ◽  
Marius Praspaliauskas ◽  
Gintare Sujetoviene
Keyword(s):  
Trace Elements ◽  
Lactuca Sativa ◽  
Translocation Factor ◽  
Living Environment ◽  
Bioaccumulation Factor ◽  
Shoot Length ◽  
Contaminated Site ◽  
Shooting Range ◽  
Fresh Biomass ◽  
Shooting Range Soil

Abstract Shooting range soil contamination with heavy metals is a common problem around the world. Usually, lead is the main contaminant in the shooting ranges. Extreme concentrations of trace elements create a toxic living environment for various plants. The purpose of this study was to evaluate the effect on lettuce (Lactuca sativa L.) grown in contaminated shooting range soil. The results showed that physiological parameters root elongation, shoot length and fresh biomass per plant was negatively affected, especially in the most contaminated site of the shooting range. At the most contaminated shooting range site shoots accumulated higher concentrations of Ni and Zn, roots – Cu, Ni, and Zn. The roots of plants grown in the most contaminated soil accumulated significantly higher concentrations of Cu, Ni and Sb in comparison with control (p < 0.05). Accumulation of Cu, Fe, Mn, Ni, Sb and Zn in the roots of the plants grown in the most contaminated site was higher compared to shoots (p < 0.05). Bioaccumulation factor of lettuce was lower than 1, only BF of Cu and Ni in plants from most contaminated site was significantly higher compared to control. In terms of translocation factor, the TFsoil to root of Cu and Pb among all plants and Ni in plants grown in the most contaminated site above 1 shows that metals absorbed by L.sativa were accumulated in root and lower metal translocation in shoots was determined, except for Mn.

scholarly journals Assessing phytotoxicity and accumulation of trace elements to Lactuca sativa of a contaminated shooting range soil

2021 ◽  
Author(s):  
Jurate Cesynaite ◽  
Marius Praspaliauskas ◽  
Gintare Sujetoviene
Keyword(s):  
Trace Elements ◽  
Lactuca Sativa ◽  
Living Environment ◽  
Bioaccumulation Factor ◽  
Shoot Length ◽  
Contaminated Site ◽  
Shooting Range ◽  
Fresh Biomass ◽  
The World ◽  
Shooting Range Soil

Abstract Shooting range soil contamination with heavy metals is a common problem around the world. Usually, lead is the primary contaminant in the shooting ranges. Extreme concentrations of trace elements create a toxic living environment for various plants. The purpose of this study was to evaluate the effect on lettuce (Lactuca sativa L.) grown in contaminated shooting range soil. The results showed that physiological parameters root elongation, shoot length and fresh biomass per plant were negatively affected, especially in the most contaminated site in the shooting range. At the most contaminated shooting range site shoots accumulated higher concentrations of Ni and Zn, roots – Cu, Ni, and Zn. The roots of plants grown in the most contaminated soil accumulated significantly higher concentrations of Cu, Ni, and Sb than the reference and accumulation of Cu, Fe, Mn, Ni, Sb and Zn in the roots of the plants grown in the most contaminated site was higher compared to shoots. Bioaccumulation factor of Cu and Ni in plants from the most contaminated site was significantly higher than the reference. Metals absorbed by L. sativa were accumulated in root and lower metal translocation in shoots was determined, except for Mn.

scholarly journals Signaling molecules from Lactuca sativa L. induced quorum sensing phenotypes in bacteria

2015 ◽  
Vol 55 (2) ◽  
pp. 166-171 ◽  
Author(s):  
Esmaeil Mahmoudi
Keyword(s):  
Quorum Sensing ◽  
Lactuca Sativa ◽  
Homoserine Lactone ◽  
Potato Tubers ◽  
Lactuca Sativa L ◽  
Circular Spot ◽  
New Finding ◽  
Gas Chromatography Mass Spectroscopy ◽  
Tissue Maceration ◽  
First Time

Abstract The outcome of the present investigation revealed that lettuce (Lactuca sativa L.) extract strongly interferes with acyl homoserine lactone (AHL) regulated physiological functions in the bioreporter strain, Chromobacterium violaceum CV026. Extracts of L. sativa also promoted production of virulence factors in plant pathogen, Pectobacterium carotovorum, and significantly increased tissue maceration on potato tubers when there was a low concentration (103 cfu · ml−1) of the bacterium was used. The thin layer chromatogram which visualised with AHL bioreporter strain, CV026, showed that L. sativa extract produced a circular spot with a diffuse edge tail and migrated with the same mobility as standard N-hexanoyl-L-homoserine lactone (C6-HSL). Gas Chromatography Mass Spectroscopy (GC-MS) analysis of the lettuce extract resulted in the identification of 19 compounds of which homoserine was identified for the first time in plants. Homoserine accounted for 2.37% of the total constituents. It is a new finding that lettuce contains AHL like substances (homoserine) which excite AHL related quorum sensing (QS) in bacteria.

scholarly journals Paecilomyces niveus Stolk & Samson, 1971 (Ascomycota: Thermoascaceae) as a pathogen of Nasonovia ribisnigri (Mosley, 1841) (Hemiptera, Aphididae) in Brazil

2015 ◽  
Vol 75 (4 suppl 1) ◽  
pp. 158-162 ◽  
Author(s):  
M. A. C. Zawadneak ◽  
I. C. Pimentel ◽  
D. Robl ◽  
P. Dalzoto ◽  
V. Vicente ◽  
...  
Keyword(s):  
Lactuca Sativa ◽  
Internal Transcribed Spacer ◽  
Control Methods ◽  
Accession Number ◽  
Alternative Control ◽  
Nasonovia Ribisnigri ◽  
Lactuca Sativa L ◽  
Synthetic Pesticides ◽  
First Time ◽  
Alternative Control Methods

Abstract Nasonovia ribisnigri is a key pest of lettuce (Lactuca sativa L.) in Brazil that requires alternative control methods to synthetic pesticides. We report, for the first time, the occurrence of Paecilomyces niveus as an entomopathogen of the aphid Nasonovia ribisnigri in Pinhais, Paraná, Brazil. Samples of mummified aphids were collected from lettuce crops. The fungus P. niveus (PaePR) was isolated from the insect bodies and identified by macro and micromorphology. The species was confirmed by sequencing Internal Transcribed Spacer (ITS) rDNA. We obtained a sequence of 528 bp (accession number HQ441751), which aligned with Byssochlamys nivea strains (100% identities). In a bioassay, 120 h after inoculation of N. ribisnigri with pathogenic P. niveus had an average mortality of 74%. The presence of P. niveus as a natural pathogen of N. ribisnigri in Brazil suggests that it may be possible to employ P. niveus to minimize the use of chemical insecticides.

scholarly journals DIFERENTES SOLUÇÕES NUTRITIVAS APLICADAS EM DUAS VAZÕES NA PRODUÇÃO HIDROPÔNICA DA CULTURA DA ALFACE

Irriga ◽  
2007 ◽  
Vol 12 (3) ◽  
pp. 354-363
Author(s):  
Roberto Rezende ◽  
Celso Helbel Júnior ◽  
Paulo Sérgio Lourenço de Freitas ◽  
Antonio Carlos Andrade Gonçalves ◽  
Rivanildo Dallacort ◽  
...  
Keyword(s):  
Experimental Design ◽  
Lactuca Sativa ◽  
Plant Nutrition ◽  
Research Unit ◽  
Irrigated Agriculture ◽  
Fresh Biomass ◽  
Lactuca Sativa L ◽  
Nutrient Film Technique ◽  
Result Analysis ◽  
Nutrient Solutions

DIFERENTES SOLUÇÕES NUTRITIVAS APLICADAS EM DUAS VAZÕES NA PRODUÇÃO HIDROPÔNICA DA CULTURA DA ALFACE   Roberto Rezende1; Celso Helbel Junior1; Paulo Sérgio Lourenço de Freitas1; Antonio Carlos Andrade Gonçalves1; Rivanildo Dallacort1; José Antônio Frizzone21Departamento de Agronomia, Universidade Estadual de Maringá, Maringá, PR,  [email protected] de Engenharia Rural, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, Piracicaba, SP  1 RESUMO O experimento foi conduzido em casa de vegetação, na unidade de pesquisa em agricultura irrigada da Universidade Estadual de Maringá. O objetivo deste trabalho foi estudar os efeitos de diferentes soluções nutritivas aplicadas em duas vazões na produção hidropônica da alface (Lactuca sativa L.), cultivada pelo sistema NFT (Nutrient Film Technique). O delineamento experimental foi o de inteiramente casualizado, em esquema fatorial 3X2 e com três repetições. Os tratamentos constaram de três soluções nutritivas com concentrações diferentes (S1=1,2 dS m-1, S2=2,5 dS m-1 e S3=0,8 dS m-1) combinadas com duas vazões de aplicação (V1=1,2 L min-1 e V2=0,8 L min-1 ) nos canais de cultivo. Para avaliar o efeito dos tratamentos no desenvolvimento da cultura os dados foram submetidos à análise de variância (Teste F), e os resultados avaliados através de teste de média de Tukey (5%). A análise dos resultados permitiu concluir que a interação dos fatores solução e vazão não foi significativa e o tratamento S1 (CE= 1,2 dS m-1) mostrou maior biomassa fresca e diâmetro do caule e menor biomassa seca de raiz. UNITERMOS: cultivo protegido, Lactuca sativa, nutrição de plantas, NFT.  REZENDE, R.; HELBEL JUNIOR, C.; FREITAS, P. S. L. de; GONÇALVES, A. C. A.; DALLACORT, R.; FRIZZONE, J. A. HYDROPONIC LETTUCE PRODUCTION UNDER TWO DIFFERENT APPLICATION FLOWS OF NUTRITIOUS SOLUTIONS   2 ABSTRACT This experiment was carried out in greenhouse, in the research unit on Irrigated Agriculture of the  of MaringáStateUniversity. The aim was to study the effect the different nutrient solutions applied in two outflow on the hydroponic lettuce (Lactuca sativa) production. The experimental design was entirely randomized, in a 3x2 factorial scheme and 3 repetitions. The treatments consisted of three nutrients solutions combined with two application outflow in the cultivation canals. To evaluate the effect of the treatments in the crop growth,  the data were submitted to  the Variance Analysis (Test F), and the results evaluated through Tukey’s Test (5%). The result analysis allowed to conclude that the interaction between solution and outflow was not significant and the treatment S1 (CE = 1,2 dS m-1) presented larger fresh biomass and  stem diameter , and smaller dry  root biomass.KEYWORDS: protection cultived, Lactuca sativa, plant nutrition, NFT

Isolierung und Identifizierung der Flavon(ol)glykoside der Endivien (Cichorium endivia L.) und des Kopfsalates (Lactuca sativa L.) / Isolation and Identification of the Flavon(ol) glycosides of the Endive (Cichorium endivia L.) and the Lettuce (Lactuca sativa L .)

1974 ◽  
Vol 29 (7-8) ◽  
pp. 355-359 ◽  
Author(s):  
M. Wöldecke ◽  
K . Herrmann
Keyword(s):  
Lactuca Sativa ◽  
Isolation And Identification ◽  
Lactuca Sativa L ◽  
Cichorium Endivia ◽  
First Time

Abstract For the first time, quercetin-3-β-ᴅ-glucuronide, quercetin-3-β-ᴅ-glucoside, quercetin-3-(O-malonyl) -β-ᴅ-glucoside and luteolin-7-/9-ᴅ-glucuronide were isolated from lettuce and kaempferol-3-β-D-glucuronide and kaempferol-3-β-ᴅ-glucoside from endives as crystals. The flavonol glucuronides are the main glycosides. Moreover a glycoside was found in endives which is very probably identical with kaempferol-3-(O-malonyl) -β-ᴅ-glucoside.

Pengaruh Jenis dan Konsentrasi Pupuk Organik Cair terhadap Pertumbuhan dan Produksi Tanaman Selada (Lactuca Sativa l.) secara Hidroponik

2017 ◽  
Vol 2 (01) ◽  
pp. 115-127
Author(s):  
Siti Hilalliyah ◽  
Intan Sari ◽  
Zahlul Ikhsan
Keyword(s):  
Lactuca Sativa ◽  
Lactuca Sativa L

Sistem hidroponik memungkinkan sayuran ditanam di daerah yang kurang subur dan daerah sempit yang padat penduduknya. Alasan penerapan teknik hidroponik yang utama adalah karena terbatasnya lahan pertanian yang produktif untuk memenuhi kebutuhan manusia yang semakin banyak tiap tahunnya, sehingga dibutuhkan suatu terobosan baru untuk memecahkan masalah tersebut. Penelitian ini telah dilaksanakan pada bulan November 2015 sampai bulan Januari 2016 yang bertempat di kampus Fakultas Pertanian Jl. Propinsi Kecamatan Tembilahan Hulu Kabupaten Indragiri Hilir Propinsi Riau.Metode penelitian yang digunakan adalah Rancangan Acak Lengkap (RAL) pola faktorial yang terdiri dari 2 faktor. Faktor pertama adalah jenis POC (N) yang terdiri dari 3 taraf perlakuan yaitu POC Jus Bumi, POC Bonggol Pisang danPOC Limbah Sayuran. Faktor kedua adalah konsentrasi larutan (K) yang terdiri dari 3 taraf perlakuan yaitu 150 ppm, 200 ppm dan 250 ppm. Parameter pengamatan adalah Tinggi Tanaman , Jumlah Daun , Luas Daun , Diameter Batang, Panjang akar ,Volume Akar, Kadar Air, dan Bobot Hasil.Hasil pengamatan menunjukkan bahwa perlakuan jenis POC jus bumi dengan konsentrasi larutan 150 ppm memberikan pertumbuhan dan produksi terbaik untuk tanaman selada secara hidroponik sistem wick. Perlakuan jenis POC limbah sayuran dengan konsentrasi 250 ppm memberikan pertumbuhan dan produksi terbaik selain POC jus bumi sehingga dapat dijadikan sumber POC alternatif.

KHẢO SÁT DƯ LƯỢNG NITRAT VÀ KIM LOẠI NẶNG (Cu, Pb, Zn) TRONG CÂY RAU XÀ LÁCH (Lactuca sativa L.) TRỒNG Ở PHƯỜNG HƯƠNG LONG - THÀNH PHỐ HUẾ

2015 ◽  
Vol 100 (1) ◽  
Author(s):  
Nguyễn Minh Trí ◽  
Nguyễn Hạnh Trinh ◽  
Nguyễn Thị Hoàng Phương
Keyword(s):  
Lactuca Sativa ◽  
Viet Nam ◽  
Lactuca Sativa L ◽  
Tu 45

Xà lách (Lactuca sativa L.) là một loại rau ăn lá quan trọng có giá trị dinh dưỡng và kinh tế cao. Cây Xà lách có đặc điểm là loại rau ngắn ngày, có thời gian sinh trưởng ngắn khoảng từ 45 - 55 ngày, có thể phát triển tốt trên nhiều loại đất, là loại rau ăn sống được sử dụng rất phổ biến trong bữa ăn hàng ngày của người dân Việt Nam nên nó được trồng quanh năm, do vậy vấn đề về chất lượng lại càng phải được quan tâm nhiều hơn. Bài báo này giới thiệu kết quả phân tích về dư lượng nitrat và các kim loại nặng (Cu, Pb, Zn) trong rau Xà lách vụ Xuân - Hè 2012 - 2013 ở phường Hương Long - thành phố Huế. Kết quả nghiên cứu cho thấy: đất trồng rau Xà lách tại phường Hương Long – thành phố Huế đạt tiêu chuẩn về hàm lượng kim loại nặng (Pb, Zn) theo QCVN 03:2008/BTNMT, nhưng hàm lượng Cu và nitrat là khá cao. Rau Xà lách thành phẩm có dư lượng nitrat cao hơn 1,21% so với quy định và các kim loại nặng (Pb, Zn, Cu) tồn dư trong rau lại ở mức cao và vượt tiêu chuẩn cho phép nhiều lần sẽ ảnh hưởng đến sức khỏe của người sử dụng.

EFEITO DO LIXIVIADO DE VERMICOMPOSTO EM DIFERENTES DILUIÇÕES, COMO BIOFERTILIZANTE PARA A CULTURA DA ALFACE (LACTUCA SATIVA L.)

2018 ◽  
Author(s):  
Ferreira Gabriel Menezes ◽  
Souza Antonio Tassio de Oliveira ◽  
Souza Alisson Silva de ◽  
Gomes Igor Thiago dos Santos ◽  
Cunha Denise de Andrade
Keyword(s):  
Lactuca Sativa ◽  
Lactuca Sativa L
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