scholarly journals Bioactive compounds and antioxidant activity of crisphead lettuce (Lactuca sativa L.) of three different cultivation systems

2020 ◽  
Author(s):  
Leonardo Dias NEGRÃO ◽  
Paulo Víctor de Lima SOUSA ◽  
Ana Maria BARRADAS ◽  
Amanda de Castro Amorim Serpa BRANDÃO ◽  
Marcos Antônio da Mota ARAÚJO ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Bioactive Compounds ◽  
Lactuca Sativa ◽  
Cultivation Systems ◽  
Lactuca Sativa L

scholarly journals The Impact of Light Spectrum and Intensity on the Growth, Physiology, and Antioxidant Activity of Lettuce (Lactuca sativa L.)

Plants ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 2162
Author(s):  
Shiren J. Mohamed ◽  
Hail Z. Rihan ◽  
Naofel Aljafer ◽  
Michael P. Fuller
Keyword(s):  
Antioxidant Activity ◽  
Lactuca Sativa ◽  
Red Light ◽  
High Irradiance ◽  
Light Spectrum ◽  
Led Light ◽  
Growth Physiology ◽  
Lactuca Sativa L ◽  
Light Intensities ◽  
The Impact

This study focused on the physiology, growth and antioxidant activity response of hydroponically grown lettuce (Lactuca sativa L.) under sole-source LED lighting of differing spectra. Lighting spectra were provided by differing combinations of LEDs of three different peak wavelengths, (Blue 435, Blue 450, and Red 663 nm) with ratios of B450/R663: 1.25 ± 0.1, B450/R663: 1.25 ± 0.1, and B450/R663 1:1 at two light intensities of photosynthetically active radiation (PAR) (270 μmol m−2 s−1 and 60 μmol m−2 s−1). A further experiment was conducted, in which Blue and Red LEDs were supplemented with Green (Blue 450, Red 663, and Green 520 nm) with ratios of B435/R663: 1.25 ± 0.1, B450/R663/G520: 1/0.73/0.26, and B450/R663: 1.25 ± 0.1. LED light intensities under the different spectra were adjusted to deliver the same level of PAR (270 ± 20 μmol m−2 s−1). Results from the first experiment showed that increased fraction of blue 435 nm in combination with red light at 663 nm at high irradiance enhanced the physiology of lettuce (i.e., significantly increased assimilation rate, stomatal conductance and transpiration rate) and increased the yield while having no significant effect on antioxidant activity. At the lower irradiance, the B435/R663 significantly increased antioxidant activity compared to other spectra. Results from the second experiment showed no significant effect of the spectra of LEDs on the physiology and yield of lettuce, but antioxidant activity was very significantly induced by B450/R663 at the ratio of 1.25 ± 0.1. However, the amount was still less than that obtained by B435/R663 1.25 ± 0.1 from the first experiment. This study indicates that LED light with a spectrum of B435/R663 at a ratio of 1.25 ± 0.1 significantly improves lettuce yield and antioxidant activity.

scholarly journals Physical-chemical characterization of yellow passion fruit produced in different cultivation systems

2020 ◽  
pp. 897
Author(s):  
Naama Jessica de Assis Melo ◽  
Andréia Mitsa Paiva Negreiros ◽  
José Dárcio Abrantes Sarmento ◽  
Patrícia Lígia Dantas de Morais ◽  
Rui Sales Júnior
Keyword(s):  
Antioxidant Activity ◽  
Bioactive Compounds ◽  
Soluble Sugars ◽  
Passion Fruit ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Maturity Stage ◽  
Cultivation Systems ◽  
Physical Chemical ◽  
Yellow Passion Fruit

Grafting is widely used to provide resistance to pests and diseases in yellow passion fruit, such as fusariosis, caused by the fungus Fusarium oxysporum f. sp. passiflorae (FOP). However, this practice may generate some changes in the postharvest characteristics of the fruits. The objective of this work was to verify the postharvest quality of fruits of P. edulis collected mature and ripe in three areas with different forms of cultivation (conventional without grafting, conventional with grafting and organic with grafting). The experiment was installed in a completely randomized design, in a 3 x 2 factorial scheme, with five replicates of four fruits each. The first factor was the different cultivation systems and the second factor was the maturity stage. The fruits were harvested, selected and submitted to physical, physical-chemical and chemical analysis, bioactive compounds and antioxidant activity. Fruit and pulp weight, longitudinal and transverse length and firmness were superior in fruits from conventional without grafting system, however fruit yield was inferior for this system. Soluble solids, pH, reducing sugars and total soluble sugars were superior in fruits from organic with grafting system. Bioactive compounds and antioxidant activity were improved in conventional without grafting system fruits.

Nutritional value, bioactive compounds and health benefits of lettuce (Lactuca sativa L.)

2016 ◽  
Vol 49 ◽  
pp. 19-34 ◽  
Author(s):  
Moo Jung Kim ◽  
Youyoun Moon ◽  
Janet C. Tou ◽  
Beiquan Mou ◽  
Nicole L. Waterland
Keyword(s):  
Bioactive Compounds ◽  
Lactuca Sativa ◽  
Nutritional Value ◽  
Health Benefits ◽  
Lactuca Sativa L

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.

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