scholarly journals Effect of High Soil Temperature in Early Growth Stage on Tuberous Root of Sweet Potato Cultivar “Koganesen gan” for Shochu Raw Material

2019 ◽  
Vol 88 (3) ◽  
pp. 214-215
Author(s):  
Hideharu Igawa ◽  
Masahito Onishi ◽  
Yu Nakamura ◽  
Takashi Fujita ◽  
Kuniaki Kawano ◽  
...  
Keyword(s):  
Soil Temperature ◽  
Sweet Potato ◽  
Growth Stage ◽  
Potato Cultivar ◽  
Early Growth ◽  
Tuberous Root ◽  
Raw Material ◽  
Early Growth Stage ◽  
High Soil ◽  
High Soil Temperature

scholarly journals Temporal Dynamics of Microcystins In Two Reservoirs With Different Trophic Status During The Early Growth Stage of Cyanobacteria

2021 ◽  
Author(s):  
Qingju Xue ◽  
Ming Kong ◽  
Liqiang Xie ◽  
Tong Li ◽  
Mengna Liao ◽  
...  
Keyword(s):  
Growth Stage ◽  
Trophic Status ◽  
Temporal Dynamics ◽  
Influence Factors ◽  
Environmental Parameters ◽  
Early Growth ◽  
Cyanobacterial Blooms ◽  
Organic Matters ◽  
Early Growth Stage ◽  
Density And Biomass

Abstract Harmful cyanobacterial blooms are increasing in frequency and severity, which makes their toxic secondary metabolites of microcystins (MCs) have been widely studied, especially in their distribution and influence factors in different habitats. However, the distribution of MCs on the early growth stage of harmful cyanobacteria and its influence factors and risks are still largely unknown. Thus, in the present study, two reservoirs (Lutian Reservoir and Lake Haitang) with different trophic status in China have been studied weekly from March to May in 2018, when the cyanobacteria communities were just in the early growth stage, to investigate the variation of MCs concentration and the relationships between MCs and environmental parameters. During the investigation, Lutian Reservoir and Lake Haitang were found to be mesotrophic and light eutrophic, respectively. In Lutian Reservoir, the concentration of EMCs was obviously higher than that of IMCs with a mean value of 0.323 and 0.264 μg/L, respectively. Meanwhile, the concentration of EMCs also fluctuated more sharply than that of IMCs. Congeners of IMC-YR and EMC-LR were respectively dominant in total concentrations of IMCs and EMCs. Unsurprisingly, in Lake Haitang, the concentrations of IMC and EMC were both significantly higher than that in Lutian Reservoir with a mean concentration of 0.482 and 0.472 μg/L, respectively. Differently, the concentration of MC-YR was dominant in both IMCs and EMCs, followed by MC-LR. In correlation analysis, the IMCs were significantly and positively correlated with the density and biomass of phytoplankton phyla and potential MCs-producing cyanobacteria and the parameters of water temperature (WT), nutrients and organic matters. Similar results were also observed for EMCs. While the different variation of MCs in two reservoirs might be primarily caused by the differences in WT, nutrients (especially phosphorus), organic matters and the composition of MCs-producing cyanobacteria. In addition, the coexistence of the dominant species of Pseudoanabaena sp., which can produce taste-and-odor compound of 2-methylisoborneol (2-MIB), might have significant impacts on the concentration and toxicity of MCs. Our results suggested that the risks posed by MCs at the early growth stage of cyanobacteria should also deserve our attentions, especially in mesotrophic water bodies.

scholarly journals Growth, Development, and Chemical Constituents of Edible Ice Plant (Mesembryanthemum crystallinum L.) Produced under Combinations of Light-emitting Diode Lights

HortScience ◽  
2018 ◽  
Vol 53 (6) ◽  
pp. 865-874 ◽  
Author(s):  
Thitipat Weeplian ◽  
Tsair-Bor Yen ◽  
Yunn-Shy Ho
Keyword(s):  
Vegetative Growth ◽  
Growth Stage ◽  
Chemical Constituents ◽  
Early Growth ◽  
Mesembryanthemum Crystallinum ◽  
Light Spectrum ◽  
Light Emitting ◽  
Early Growth Stage ◽  
Light Spectra ◽  
Late Growth

To investigate the effects of light treatments on the growth morphology and chemical constituents of Mesembryanthemum crystallinum L. plants, red (R), blue (B), far red (Fr), and white (W) light-emitting diodes (LEDs) were configured to provide different combinations of light spectra and photosynthetic photon flux densities (PPFDs). In Expt. 1, five light spectra of red/white (RW), red/white/far red (RWFr), red/white/high-intensity far red (RWFrD), red/blue (RB), and red/blue/far red (RBFr) were set up in two 3-layered racks with circulating hydroponic systems. In each light spectrum treatment, the distance between the LED lamps and the transplanting board was regulated to provide low PPFD and high PPFD treatments. In Expt. 2, the effect of Fr was further investigated in plants in the early and late growth stages. RWFr light was modified by covering the Fr lamps to become red/white without far red (RW−Fr) light during the early growth stage, and then removing the covers to provide the Fr spectrum red/white with far red (RW+Fr) during the later growth stage. This study suggested that high PPFD was not beneficial for promoting plant growth in any light spectrum treatment. Among light spectrum treatments at a PPFD of 215 ± 15 μmol·m−2·s−1, RW light produced higher vegetative growth. In the late growth stage, RW and RB combined with Fr light promoted reproductive growth, antioxidant activities, and secondary compounds, such as phenolic compounds, pinitol accumulation, and betacyanins. Therefore, RW (227 μmol·m−2·s−1), RW−Fr (162 μmol·m−2·s−1), and RB (162 μmol·m−2·s−1) are suggested for the early growth stage to promote vegetative growth. Then additional Fr light can be applied in addition to RW for secondary metabolite induction in the late growth stage.

scholarly journals Exploitation of variability for salinity tolerance in maize hybrids (Zea mays L.) at early growth stage

2016 ◽  
Vol 11 (42) ◽  
pp. 4206-4213 ◽  
Author(s):  
Qayyum Abdul ◽  
Muhammad Saeed Hafiz ◽  
Hanif Mamoona ◽  
Noor Etrat ◽  
Malik Waqas ◽  
...  
Keyword(s):  
Zea Mays ◽  
Salinity Tolerance ◽  
Growth Stage ◽  
Zea Mays L ◽  
Early Growth ◽  
Early Growth Stage ◽  
Maize Hybrids

scholarly journals The Content of Phenolic Acids and Flavonols in the Leaves of Nine Varieties of Sweet Potatoes (Ipomoea batatas L.) Depending on Their Development, Grown in Central Europe

Molecules ◽  
2020 ◽  
Vol 25 (15) ◽  
pp. 3473 ◽  
Author(s):  
Barbara Krochmal-Marczak ◽  
Tomasz Cebulak ◽  
Ireneusz Kapusta ◽  
Jan Oszmiański ◽  
Joanna Kaszuba ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Phenolic Acids ◽  
Leaf Development ◽  
Growth Stage ◽  
Polyphenolic Compounds ◽  
Raw Material ◽  
Growth Stages ◽  
Potato Leaf ◽  
Antioxidant Power ◽  
Sweet Potato Leaves

The aim of the study was the qualitative and quantitative analysis of the bioactive components present in the leaves of 9 sweet potato cultivars grown in the moderate climate in Poland, which were harvested at different growth stages according to the BBCH (Biologische Bundesanstalt, Bundessortenamt und Chemische Industrie) scale (14, 51, 89). It was found that sweet potato leaves contained 7 polyphenolic compounds, including 5 chlorogenic acids—neochlorogenic acid (5-CQA), chlorogenic acid (3-CQA), 4-cryptochlorogenic acid (4-CQA), 34-di-O-caffeoylqunic acid (3,4-CQA), 3,5-di-O-caffeoylqunic acid (3,5-CQA)—and 2 flavonoids, quercetin-3-O-galactoside (Q-3-GA) and quercetin-3-O-glucoside (Q-3-GL). Their content depended on the genotype of the examined cultivars and on the stage of leaf development. The mean content of the identified polyphenolic compounds in the examined cultivars ranged from 148.2 to 14.038.6 mg/100 g−1 DM for the leaves harvested at growth stage 14 according to the BBCH scale. In the case of leaves harvested at BBCH stage 51, the concentration of polyphenolic compounds ranged from 144.76 to 5026.8 mg/100 g−1 DM and at BBCH stage 89 from 4078.1 to 11.183.5 mg/100 g−1 DM. The leaves of the Carmen Rubin cultivar collected at stage 14 contained the highest amount of polyphenolic compounds, while Okinava leaves had the highest amount of these compounds at stage 51. The highest content of polyphenolic compounds in leaves at BBCH growth stage 89 was found in the Radiosa variety. The highest concentration levels were found for 3-CQA at all stages of leaf development. Significant correlations between polyphenol content and antioxidant activity measured by 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS), 2,2-diphenyl-1-picrylhydrazyl (DPPH), and ferric reducing/antioxidant power (FRAP) were found. The results of this experiment revealed that the growth stages and genetic properties of cultivars have a very significant influence on the content of phenolic acids and flavonols in sweet potato leaves. The results are innovative and can have a practical application, as the knowledge of the content of the substances under study makes it possible to determine the optimal management practice of sweet potato leaf harvest in order to obtain more top-quality raw material.

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