Journal of Applied Botany and Food Quality 2020-03-30T15:05:32+02:00 Journal of Applied Botany and Food Quality Open Journal Systems <p>This journal is published in collaboration with the German Society for Quality Research on Plant Foods and the Section Applied Botany of the German Botanical Society. It focuses on applied research in plant physiology and plant ecology, plant biotechnology, plant breeding and cultivation, phytomedicine, plant nutrition, plant stress and resistance, plant microbiology, plant analysis (including -omics techniques), and plant food chemistry.</p> Propagation potential for the conservation of Brackenridgea zanguebarica Oliv., a critically endangered plant species endemic to Vhembe District in Limpopo Province (South Africa) 2020-03-30T15:05:32+02:00 Makuete Andre Patrick Tiawoun Milingoni Peter Tshisikhawe Eastonce Tendayi Gwata <p><em>Brackenridgea zanguebarica</em> Oliv. is an important multipurpose tree valued for its medicinal uses in Vhembe District. The unsustainable harvesting coupled with poor seed germination in the wild is threatening its regeneration; which poses a challenge in efforts to its conservation. This study was conducted to identify suitable methods for propagating <em>B. zanguebarica</em> species using seeds and stem cuttings. Seeds propagation was carried out to evaluate the effect of various pre-treatments. Vegetative propagation was tested to assess if <em>B. zanguebarica</em> could be successfully propagated via stem cuttings with appropriate treatments. The results showed that <em>B. zanguebarica</em> seeds did not germinate at all under any of the conditions tested. Stem cuttings presented a possibility of propagating this species despite the poor results obtained, where 51% of cuttings across all treatment produced buds and 17% only developed leaves without any root development. The growth media had insignificant (P &gt; 0.05) effect on some vegetative growth parameters, while growth hormones showed significant (P &lt; 0.05) effect in all the vegetative growth parameters of stem cuttings where IAA performed better than IBA and NNA. However, their interaction were significant (P &lt; 0.05) on all the growth parameters of Brackenridgea zanguebarica stem cuttings except on the percentage of cuttings that produced buds (P = 0.107). The findings showed that <em>B. zanguebarica</em> is difficult to propagate sexually and asexually, hence, further studies are needed to identify suitable methods for both seed and vegetative propagation of this plant.</p> 2020-03-30T11:45:06+02:00 Copyright (c) 2020 The Author(s) Effect of moisture-proof corrugated boxes on water loss from cabbage during storage 2020-03-04T14:14:44+01:00 Daniel Z. K. Wambrauw Yuko Sato Naoki Sugino Saki Matsumoto Ling Li Hiroaki Kitazawa <p>Reducing water loss from cabbages during storage is essential to extend the shelf life of this widely consumed horticultural crop. In this study, we evaluated the effect of moisture-proof corrugated boxes (MPBs) on water loss from cabbages during storage. We first evaluated the water vapour barrier property of MPB material and found it to be superior to that of conventional corrugated box (CCB) material. Cabbages were then stored in MPBs and CCBs for 9 days, during which their water loss was measured. Cabbages stored in MPBs showed significantly less water loss than those in CCBs. Moreover, storage in the MPBs did not negatively affect the fundamental qualities of the cabbages, such as the green colouration, the soluble solid content, and the ascorbic acid content. The use of MPBs was demonstrated to be an effective and viable way to reduce water loss from cabbages during storage.</p> 2020-03-04T12:11:59+01:00 Copyright (c) 2020 The Author(s) Effects of soil warming and altered precipitation patterns on photosynthesis, biomass production and yield of barley 2020-03-04T14:18:55+01:00 Ireen Drebenstedt Iris Schmid Christian Poll Sven Marhan Robert Kahle Ellen Kandeler Petra Högy <p>Crop productivity and plant physiology are affected by rising temperatures and altered precipitation patterns due to climate change. We studied the impacts of an increase in soil temperature of 2.5 °C, a decrease in summer precipitation amount of 25%, a reduction in summer precipitation frequency of 50%, and their interactions on photosynthesis, biomass production, and yield of spring barley (<em>Hordeum vulgare</em> L. cv. RGT Planet) in a temperate agricultural ecosystem near Stuttgart (Germany). Leaf gas exchange of barley appeared to be affected mainly by drought in the form of reduced precipitation frequency or by a combination of changes in soil temperature and precipitation patterns. In contrast, biomass production and yield parameters were more affected under soil warming alone. In addition, biomass of roots increased under soil warming at stem elongation. Stable grain yield was observed under reduced precipitation amount and also under increased evaporation through soil warming. These findings provide additional evidence that barley is relatively drought tolerant, which should be taken into consideration in the context of appropriate crop selection under climate change.</p> 2020-03-04T12:05:14+01:00 Copyright (c) 2020 The Author(s) Effect of potassium fertilization on the contents of antioxidants in three cocktail tomato cultivars 2020-03-04T14:13:23+01:00 Frederike Else Helene Sonntag Diana Bunzel Sabine Kulling Ina Porath Franziska Pach Elke Pawelzik Inga Smit Marcel Naumann <p>Tomatoes are an important source of health beneficial phytochemicals, which act as antioxidants such as ascorbic acid, phenolic compounds, carotenoids, and tocopherols. The content of antioxidants is influenced, among others, by abiotic stress factors, like the nutritional status. Potassium (K) is a macronutrient, which is essential for several physiological functions in plants, for example, translocation of assimilates, activation of enzymes, maintenance of turgescence, and stomata regulation. The aim of this study was to investigate the effect of increasing K fertilization on the concentration of antioxidants in cocktail tomatoes. Therefore, three tomato cultivars (Primavera, Resi, and Yellow Submarine), grown in an outdoor pot experiment, were fertilized with increasing K doses for two consecutive years. It was confirmed that antioxidants in tomato fruit can be affected by the K regime, but was also shown that other factors may reduce or even inverse those effects when cultivation takes place in an uncontrolled outdoor environment. Most consistent K fertilization effects were found for naringenin, <em>p</em>-coumaric acid and caffeic acid. However, enrichment of tomatoes with antioxidants by K fertilization is cultivar dependent and, therefore, general statements should be avoided.</p> 2020-03-04T12:02:30+01:00 Copyright (c) 2020 The Author(s) Biological and pharmacological activities of essential oils of Ocimum basilicum L. grown with Zn-salicylic acid nano-complex 2020-02-14T12:35:11+01:00 Vahid Tavallali Hossein Gholami Omid Espargham <p>A greenhouse study was conducted to investigate the impact of different rates of application of Zn-EDTA, salicylic acid (SA) and zinc-salicylic acid nano-complex (n[Zn(SA)<sub>2</sub>]) on the antioxidant and antimicrobial activities of essential oil (EO) of sweet basil (<em>Ocimum basilicum</em> L.). Sixty-one compounds were detected in the EOs after Zn and SA sources were applied to the plants. GC-MS analysis showed that the main components of the EOs after the treatment were epi-α-Cadinol and trans-α-Bergamotene. The highest amount of epi-α-Cadinol (29.06±1.31%) and trans-α-Bergamotene (11.90±1.1%) in the EO were observed at 0.2% n[Zn(SA)<sub>2</sub>] treatment. In general, the application of 0.2% n[Zn(SA)<sub>2</sub>] significantly increased percentages of phenolic and flavonoid compounds of extract. HPLC analysis showed that the predominant phenolic compound after treatments with different Zn and SA sources were rosmarinic acid and quercetin, respectively. The lowest IC<sub>50</sub> values for RNS, ROS, TBARS and H<sub>2</sub>O<sub>2</sub>, scavenging activities were obtained in EOs of basils which were treated with 0.2% n[Zn(SA)<sub>2</sub>]. Zinc-salicylic nano-complex was the most effective treatment to inhibit fungal and bacterial growth. Our results are quite encouraging since the Eos of n[Zn(SA)<sub>2</sub>] treated basil exhibited potent antioxidant effect, antimicrobial activities comparable with synthetic drugs.</p> 2020-02-14T11:43:30+01:00 Copyright (c) 2020 The Author(s)