Influence of agro-ecological production areas on antioxidant activity, reducing sugar content, and selected phytonutrients of orange-fleshed sweet potato cultivars

Motsa, Nozipho M.; Modi, Albert T.; Mabhaudhi, Tafadzwanashe

doi:10.1590/1678-457x.6443

Cited by 15 publications

(10 citation statements)

References 20 publications

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“…The contents of polyphenols and the antioxidant activity can be influenced by agro-ecological conditions, including locality, humidity, soil composition, water deficit, and temperature. Motsa et al [36] found that the contents of secondary metabolites, especially of polyphenols, can increase under drought conditions because of the increased oxidative stress perceived. Similarly, Oh et al [37] revealed that drought stress and high temperatures can lead to increased amount of bioactive compounds which may serve as the main defense mechanism.…”

Section: Resultsmentioning

confidence: 99%

Characterization of Rosa canina Fruits Collected in Urban Areas of Slovakia. Genome Size, iPBS Profiles and Antioxidant and Antimicrobial Activities

et al. 2020

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The studies of plant bacterial endophytes, colonizing the plant tissues without any signs of diseases, are essential for understanding of ecological interactions. The aim of our study is to detect microbiological contamination and to assess the antimicrobial, antioxidant activity, total phenolic, carotenoid content, genome size, and ploidy of non-cultivated Rosa canina sampled from urban areas. Samples of Rosa canina fruits were collected in three locations in Slovakia. The highest total viable count and the Enterobacteriaceae count in fruits were 4.32 log CFU/g and 4.29 log CFU/g, respectively. Counts of the mesophilic anaerobic sporulating bacteria, Pseudomonas spp., and of the microscopic fungi and yeasts were 3.00, 2.15 log CFU/g, 3.65 log CFU/g, and 2.76 log CFU/g, respectively. Regarding the antimicrobial activity, Escherichia coli and Klebsiela oxytoca were the most sensitive species among the assayed microorganisms to the treatment with the ethanolic extracts of Rosa canina fruits. The fruits were rich in bioactive compounds, polyphenols, and carotenoids, that could be related to their antioxidant activity. Genome sizes of analyzed samples ranged from 2.3 to 2.96. DNA-based fingerprinting obtained by iPBS markers of the Rosa canina var. lapidicola Heinr. Braun., was characterized by some distinctive inserted loci. An interdisciplinary study was performed for the dog roses from different parts of Slovakia that resulted in deeper characterization of this species.

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Section: Resultsmentioning

confidence: 99%

Characterization of Rosa canina Fruits Collected in Urban Areas of Slovakia. Genome Size, iPBS Profiles and Antioxidant and Antimicrobial Activities

et al. 2020

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“…Faktor lingkungan, yakni radiasi sinar matahari diperlukan dalam sintesis karotenoid (karotenogenesis) karena kemampuannya untuk menyerap cahaya. Selain itu, pupuk K, jenis tanah, ketinggian tempat, suhu, ketersediaan air, musim, umur panen, dan ukuran umbi juga berpengaruh terhadap warna dan kadar beta karoten ubi jalar (Liu et al 2009;Ukom et al 2009;Abd El-baky et al 2010;Ukom et al 2011;Laurie et al 2012;Faber et al 2013;Motsa et al 2015;Kathabwalika et al 2016). pemberian pupuk rekomendasi urea, TSP, dan KCl masing-masing 100 kg/ha (Ginting et al 2013).…”

Section: Sifat Fisik Dan Kadar Beta Karoten Umbiunclassified

“…pemberian pupuk rekomendasi urea, TSP, dan KCl masing-masing 100 kg/ha (Ginting et al 2013). Pada kondisi lingkungan tumbuh yang kurang optimal, sisntesis metabolit sekunder, termasuk beta karoten, biasanya meningkat sebagai mekanisme pertahanan diri tanaman (Jaleel et al 2009;Wang dan Frei 2011;Motsa et al 2015). Namun hasil penelitian ini perlu dikonfirmasi lagi pada lokasi yang sama melihat besarnya variasi kadar beta karoten umbi (Tabel 2) dan relatif kecilnya ukuran umbi untuk memastikan pengaruh perlakuan pemupukan N terhadap kadar beta karoten ubi jalar di lahan pasang surut.…”

Section: Sifat Fisik Dan Kadar Beta Karoten Umbiunclassified

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Sifat Fisik dan Kimia Ubijalar pada Berbagai Pemupukan N di Lahan Pasang Surut Kalimantan Selatan

Ginting¹,

Yulifianti²,

Elisabeth³

2018

bulpa

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Lahan pasang surut di Kalimantan Selatan memiliki potensi untuk usahatani ubi jalar (Ipomoea batatas L.). Namun kondisi lahan yang masam, tingkat kejenuhan Al dan Fe yang tinggi, serta rendahnya kesuburan tanah memerlukan teknologi budidaya yang tepat. Penelitian ini bertujuan untuk mempelajari sifat fisik, kimia, dan sensori ubi jalar yang dibudidayakan di lahan pasang surut tipe C dengan pemupukan N yang berbeda. Penelitian dilaksanakan di Desa Sidomulyo, Kecamatan Wanaraya, Kabupaten Barito Kuala pada bulan Februari hingga Juni 2016 menggunakan rancangan petak terbagi dengan tiga ulangan.Varietas ubi jalar (Beta 3 dan lokal) digunakan sebagai petak utama dan sumber pupuk N (pupuk kandang 5 t/ha, Phonska 300 kg/ha, KNO3 2.000 L/ha dan kombinasi ketiganya) sebagai anak petak. Untuk ameliorasi digunakan dolomit 1 t/ha. Pengamatan, meliputi sifat fisik, kimia, dan sensori umbi. Hasil penelitian menunjukkan bahwa varietas Beta 3 (daging umbi oranye) memiliki warna umbi (L*) paling tua pada pemupukan KNO3 dengan kadar beta karoten tertinggi (7.003 µg/100 g bb). Namun sumber pupuk N tidak berpengaruh terhadap intensitas warna umbi varietas lokal (daging umbi putih sembur ungu). Interaksi varietas dan pemupukan N berpengaruh nyata terhadap kadar abu dan pati umbi, sedangkan faktor genetik (varietas) tampak dominan pada kadar air, gula reduksi, dan amilosa. Pemupukan dengan pupuk kandang, Phonska dan KNO3 tidak berpengaruh terhadap kadar nitrat umbi segar, namun kombinasi ketiganya memberikan kadar nitrat yang lebih rendah. Kadar nitrat umbi (2,82-4,69 mg/kg bb) masih dalam batas aman untuk konsumsi. Bentuk, warna kulit dan daging umbi serta warna, rasa, dan tekstur umbi kukus varietas Beta 3 lebih disukai daripada varietas lokal sehingga berpeluang untuk dikembangkan di lahan pasang surut.

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“…Sweet potatoes are food crops with wide ecological adaptability, drought-tolerant, often cultivated in the marginal soils under low agricultural input and are able to grow with limited water available for irrigation (Motsa et al, 2015a;Motsa et al, 2015b;Chipungu et al, 2018;Lestari et al, 2019). Sweet potato plantations can reduce soil erosion because of its vines' ability to cover the soil surface (Oshunsanya, 2016).…”

Section: Introductionmentioning

confidence: 99%

The Pruning Effect on the Storage Root Yield and Starch Content of Sweet Potato Clones Planted at Dry Land

Indawan

Lestari

Thiasari

et al. 2020

Caraka Tani J. Sustain. Agric.

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Sweet potato is a dual-purpose crop, which could produce both food and feed. The vine pruning prior to storage root harvesting was intended to increase the quantity and quality of fresh forage for animal feed. This study aims to evaluate whether periodic pruning can affect the storage root yield and its starch content. This experiment employed split-plot design with two factors and three replications. The first factor as main plot was vine pruning which consisted of four distinct pruning times (four times, three times, twice and once). The second factor as sub-plot was cultivars which consisted of six dual-purpose cultivars and two controls. The storage root yields, vine yields, starch yields and the reduction in storage root yields were observed. The results showed that the vine pruning decreased the storage root yields, with small increases the vine yields. The percentage of the reduction in storage root yields were 4-58%, while the decrease vine yields are relatively inconsistent. The starch yield of the cultivars with one pruning time were in the range of 2.34-6.67 ton ha-1. On the contrary, the three times pruning or more since 80 days after transplanted can reduce the starch yields for more than 50%. The slight increase in vines yield due to pruning was followed by the decrease in storage root yields and starch content of the sweet potato.

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Influence of agro-ecological production areas on antioxidant activity, reducing sugar content, and selected phytonutrients of orange-fleshed sweet potato cultivars

Cited by 15 publications

References 20 publications

Characterization of Rosa canina Fruits Collected in Urban Areas of Slovakia. Genome Size, iPBS Profiles and Antioxidant and Antimicrobial Activities

Characterization of Rosa canina Fruits Collected in Urban Areas of Slovakia. Genome Size, iPBS Profiles and Antioxidant and Antimicrobial Activities

Sifat Fisik dan Kimia Ubijalar pada Berbagai Pemupukan N di Lahan Pasang Surut Kalimantan Selatan

The Pruning Effect on the Storage Root Yield and Starch Content of Sweet Potato Clones Planted at Dry Land

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