Data Analysis with RStudio

Kronthaler, Franz; Zöllner, Silke

doi:10.1007/978-3-662-62518-7

Cited by 20 publications

(10 citation statements)

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“…Statistical studies were performed in R Studio (Kronthaler and Zöllner, 2021), including two factorial ANOVA, correlation, principal component analysis, and clustering. The cluster score (Nagar et al, 2015) was derived as a weighted linear combination of physiological traits (i.e., summation of weightage multiplied with their respective physiological trait).…”

Section: Discussionmentioning

confidence: 99%

Phenotyping wild potatoes (Solanum Sect. Petota) for photosynthesis associated traits under heat stress.

Bashir,

Nicolao,

Barros

et al. 2023

Preprint

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Heat stress is one of the major factors reducing potato yield by limiting the plant photosynthesis activity, production and partitioning of assimilates to the sink. Potato wild relatives (Solanum sect. Petota) are a natural reservoir of valuable traits for abiotic stress resistance. However, it is necessary to assess the response of wild potato genotypes based on physiological features such as gas exchange, chlorophyll index and chlorophyll fluorescence that are promising candidates to improve crop photosynthesis under adverse conditions. Multivariate approaches on two factor experimental design were used to select the best performing genotypes for most important traits influencing the photosynthetic activity under control and heat stress treatments. The most important traits to be focused on are net photosynthetic rates, transpiration rates, and stomatal conductance along with effective photochemical yield of PSII, Coefficient of photochemical yield of PSII, electron transport rate and Fv/Fm ratio which are highly associated with heat stress conditions. Solanum commersonii accessions (BGB003, BGB009) are more likely to be tolerant to heat stress, followed by S. tuberosum 2x (BGB091, BGB093) and S. chacoense (BGB101). The assessment of wild accessions for photosynthetic traits under heat stress is a reliable way to discriminate the most promising sources of abiotic stress resistance even though they have unreliable tuber traits for the breeding of the potato crop.

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Section: Discussionmentioning

confidence: 99%

Phenotyping wild potatoes (Solanum Sect. Petota) for photosynthesis associated traits under heat stress.

Bashir,

Nicolao,

Barros

et al. 2023

Preprint

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“…Pearson correlation was computed, and a significance level of p < 0.05 was applied. The color correlation diagram between the derived mass transfer rate parameters, drying time, effective moisture diffusivity, energy consumption/emission of CO 2 , total anthocyanins, total phenolics and antioxidant activity was generated using the R Studio 1.4.1106 program [ 13 ].…”

Section: Methodsmentioning

confidence: 99%

Physical and Chemical Properties of Convective- and Microwave-Dried Blackberry Fruits Grown Using Organic Procedures

Petković,

Miletić,

Pantelić

et al. 2024

Foods

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This study aimed to evaluate the effect of convective and microwave drying on the bioactive-compounds content of blackberry (Rubus fruticosus) fruits, as well as drying parameters and energy consumption. The fruit was dehydrated in a convective dehydrator at a temperature of 50 °C and 70 °C and in a microwave oven at power levels of 90 W, 180 W and 240 W. The highest amount of anthocyanins, polyphenols and antioxidant capacity were obtained in blackberry fruits that were microwave dried at 90 W and 180 W (46.3–52.5 and 51.8–83.5 mg 100 g−1 dm of total anthocyanins, 296.3–255.8 and 418.4–502.2 mg 100 g−1 dm of total phenolics, and 1.20–1.51 and 1.45–2.35 mmol TE 100 g−1 dm of antioxidant capacity for 90 W and 180 W models, respectively). It turned out that microwave dehydration shortened the processing time and lowered the energy consumption compared to convective drying (a significantly reduced drying time of 92–99% with microwave dehydration). Blackberry fruits dehydrated at 240 W showed the shortest dehydration time (59–67 min), minimal energy consumption (0.23 kWh) and the most efficient diffusion (1.48–1.66 × 10−8 m2 s−1).

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“…A Thermo Xcalibur™ data processing system was used to obtain the original data; LipidSearch™ software, version 4.0, was used for data processing. R (version 3.6.2; R Core Team, 2019) and RStudio (version 1.1.463; RStudio, 2018) were used to conduct orthogonal partial least squares–discriminant analysis (OPLS‐DA; Kronthaler & Zöllner, 2021). The content of MGDG and DGDG was expressed as the mean ± standard deviation ( n = 3).…”

Section: Methodsmentioning

confidence: 99%

Characterization of monogalactosyldiacylglycerol synthases in Gracilariopsis lemaneiformis and their potential roles in the fading of the thallus

Zhang,

Yuan,

et al. 2023

Journal of Phycology

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Membrane lipids play essential roles in regulating physiological properties in higher plants and algae. Monogalactosyldiacylglycerol (MGDG) is a major thylakoid membrane lipid, and it is an important source of polyunsaturated fatty acids for cells, plays a key role in the biogenesis of plastids, and maintains the function of the photosynthetic machinery. Several studies have indicated that the knockdown of MGDG synthase results in membrane lipid remodeling, albino seedlings, and changes in photosynthetic performance. However, the effects of MGDG synthase (MGD) inhibitors on lipids in macroalgae have not yet been clarified. Here, we characterized the effects of MGD inhibitors (ortho‐phenanthroline and N‐ethylmaleimide) on the composition of the fatty acids observed in MGDG and digalactosyldiacylglycerol (DGDG) in Gracilariopsis lemaneiformis using electrospray ionization–mass spectrometry. The most abundant MGDG species contained 16:0/18:1 (sn‐1/sn‐2) fatty acids, and the most dominant DGDG species contained 20:5/16:0 (sn‐1/sn‐2) fatty acids. Measurements of photosynthetic pigments and photosynthetic parameters revealed that photosynthesis of G. lemaneiformis was impaired. Principal component analysis and Spearman's correlation analysis revealed interactions between specific MGDG structural composition patterns and key metabolites involved in photosynthesis, indicating that 20:4/16:0 (sn‐1/sn‐2) MGDG and 16:0/18:1 (sn‐1/sn‐2) MGDG affect the structure and function of phycobilisomes and thus the color of G. lemaneiformis. Three genes (GlMGD1, GlMGD2, and GlMGD3) were cloned and identified. The addition of N‐ethylmaleimide to G. lemaneiformis did not affect the abundance of GlMGD mRNA, and the abundance of transcripts was significantly decreased by ortho‐phenanthroline.

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Data Analysis with RStudio

Cited by 20 publications

References 0 publications

Phenotyping wild potatoes (Solanum Sect. Petota) for photosynthesis associated traits under heat stress.

Phenotyping wild potatoes (Solanum Sect. Petota) for photosynthesis associated traits under heat stress.

Physical and Chemical Properties of Convective- and Microwave-Dried Blackberry Fruits Grown Using Organic Procedures

Characterization of monogalactosyldiacylglycerol synthases in Gracilariopsis lemaneiformis and their potential roles in the fading of the thallus

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