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3 results on '"Horablaga, Marinel"'

1. Fractal analysis for soybean leaves characterization.

Author

Agapie, Alina Laura, Horablaga, Marinel Nicolae, Gorinoiu, Gabriela, and Sala, Florin

Subjects
*FRACTAL analysis, *FOLIAR diagnosis, *FRACTAL dimensions, *LEAF area, *GENOTYPES
Abstract

The present study used fractal analysis for soybean leaves characterization (Glycine max (L.) Merr), Caro and Onix genotypes. The box-counting method was used to find the fractal dimensions of leaf shape in the two genotypes. The fractal dimensions were D = 1.627 at the Caro genotype, and respectively D = 1.509 at the Onix genotype. In the case of Caro genotype, correlation analysis showed average correlations between fractal dimension (D) and leaf width (W), r = 0.728, respectively between D and scan leaf area (SLA), r = 0.778 and low intensity correlations between D and perimeter of the leaves (Per), r = 0.624, respectively between D and the leaf length (L), r = 0.484. In the case of Onix genotype, high correlations were found between D and SLA (r = 0.862), between D and W (r = 0.812); average correlations between D and Per (r = 0.766), and respectively low correlations between D and L (r = 0.685). Based on D values, SLA prediction was possible under conditions of R² = 0.631, p << 0.001 for Caro genotype, and R² = 0.812, p << 0.001 respectively for Onix genotype. [ABSTRACT FROM AUTHOR]

Published
2020
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2. Foliar surface calculation model in soybean.

Author

Agapie, Alina Laura, Horablaga, Marinel Nicolae, Gorinoiu, Gabriela, and Sala, Florin

Subjects
*LEAF area, *CORRECTION factors, *GENOTYPES
Abstract

The present study aimed at determining the foliar surface in three soybean genotypes (Glycine max (L.) Merr.) by non-destructive MLA method (measured leaf area). Were considered a relationship of type MLA = L×W×CF between leaf parameters, as length (L) and width (W), and a surface constant as correction factor (CF). The optimum CF value influences the accuracy of foliar surface determination. The CF values for the three genotypes were determined when the minimum error (ME) between scanned leaf area (SLA) and measured leaf area (MLA) was obtained. For Caro genotype, MLA = 25.357cm², under conditions of CF = 0.31, RMSE = 1.08798. For Felix genotype, MLA = 23.075 cm², in conditions of CF = 0.32, RMSE = 1.06757, and for Onix genotype, MLA = 20.751 cm², in conditions of CF = 0.31, RMSE = 1.21283. [ABSTRACT FROM AUTHOR]

Published
2020
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3. RESPONSE OF SOME VARIETIES AND GENOTYPES OF TRITICALE (TRITICOSECALE WITTM.) TO THE ATTACK OF PUCCINIA STRIIFORMIS WEST. FUNGUS IN WESTERN ROMANIA.

Author

COTUNA, Otilia, HORABLAGA, Marinel, BOSTAN, Cristian, SĂRĂȚEANU, Veronica, and AGAPIE, Alina Laura

Subjects
*STRIPE rust, *TRITICALE, *PUCCINIA striiformis, *GENOTYPES, *BIOMEDICAL materials, *GRAIN yields, *CASE studies
Abstract

Nowadays the species Triticosecale has started to gain ground in Banatului Plain and in Romania, mainly due to the increased yields of biomass and grains in comparison with other cereals and due to the high adaptability to different climate and soil conditions. Triticale is interesting for inbreeding due to its features mainly as fodder plant. Triticale proved during time that it is sensitive to the attack of the cereals pathogens. In Banatului Plain triticale is sensitive to the attack of the fungi Puccinia striiformis (yellow stripe rust) and Drechslera tritici repentis (tan spot). In Banatului Plain tan spot appears in every year, but yellow stripe rust isn't appearing yearly due to its demand for special conditions of temperature and moisture. This research is a case study developed in the spring of year 2018 when climate conditions were favourable to the development of the fungus Puccinia striiformis. Thus, there was monitored an experimental filed comprising nine lines and one variety of triticale in conditions of natural infection. There was evaluated the resistance to this dangerous pathogen of the cereals. The biological material used was: KT 1430 - 10, KWT 13069, 202.567, KT 390, 10T70126, 08TF01, 141 TRICAL, WINTER MAX and TM 01. Attack severity was comprised between 10% (line 10 T 70126) and 90% in line 202.567 that had proved to be the most sensitive from entire experimental field. Frequency of the plants with symptoms was maximal in five triticale lines from experience (F = 100%). Winter Max variety was highlighted by a low attack frequency of 5% plants with symptoms, the lowest from the experiment. All the analysed genotypes were reacted differently to the pathogen attack. Five triticale lines have manifested high sensitivity (FS) to the attack of Puccinia striiformis. Triticale lines 08TF01 and 141Trical and the variety Winter Max have manifested a reaction of sensitivity to the pathogen (S). Moderate resistance was noticed in only one triticale line from experimental field, respectively the line 10T70126. [ABSTRACT FROM AUTHOR]

Published
2019

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