Comparing cotyledon, leaf and root resistance to downy mildew in radish (Raphanus sativus L.)

Coelho, Paula S.; Valério, Luísa; Monteiro, António A.

doi:10.1007/s10681-022-03031-x

Cited by 4 publications

(1 citation statement)

References 19 publications

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“…Leveraging a smartphone's camera enables researchers to conveniently and swiftly capture images, facilitating the analysis of plant traits and advancing agricultural practices [18]. For example, Coelho et al examined the resistance of different plant parts of radish to downy mildew, specifically cotyledons, leaves, and roots [19]. Results indicated that cotyledons were the most susceptible, while roots exhibited the highest resistance, with leaves displaying intermediate resistance.…”

Section: Introductionmentioning

confidence: 99%

Vision-Based White Radish Phenotypic Trait Measurement with Smartphone Imagery

et al. 2023

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White radish is a nutritious and delectable vegetable that is enjoyed globally. Conventional techniques for monitoring radish growth are arduous and time-consuming, encouraging the development of novel methods for quicker measurements and greater sampling density. This research introduces a mathematical model working on high-resolution images to measure radish’s biophysical properties automatically. A color calibration was performed on the dataset using a color checker panel to minimize the impact of varying light conditions on the RGB images. Subsequently, a Mask-RCNN model was trained to effectively segment different components of the radishes. The observations of the segmented results included leaf length, leaf width, root width, root length, leaf length to width, root length to width, root shoulder color, and root peel color. The automated real-life measurements of these observations were then conducted and compared with actual results. The validation results, based on a set of white radish samples, demonstrated the models’ effectiveness in utilizing images for quantifying phenotypic traits. The average accuracy of the automated method was confirmed to be 96.2% when compared to the manual method.

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Section: Introductionmentioning

confidence: 99%

Vision-Based White Radish Phenotypic Trait Measurement with Smartphone Imagery

et al. 2023

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Efficiency of new growth regulators in growing daikon

Bocharova,

Dyikanova,

Vorobyev

2024

E3S Web Conf.

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The paper presents the results of research on the effectiveness of using new plant growth regulators (PGRs) of carbamates and oxamates series on daikon when treating seed material. The effect of growth regulators on seed quality, growth, and yield of daikon (Raphanus sativus L. subsp. acanthiformis Stanken.) of Sasha variety was studied. The research was conducted in laboratory-field conditions from 2022 to 2023 at the Educational Scientific and Production Center for Horticulture and Vegetable Growing named after V.I. Edelstein. In both laboratory and field experiments, the seed material was treated once, followed by plant development using classical technology. All treatments applied had a stimulating effect on seed germination and showed statistically significant differences compared to the control variant. Treatment of seed material with growth regulators of the carbamate series had a significant effect on the size of the assimilation apparatus. The maximum root crop weight was recorded in the variant with the Kartolin-2 preparation, with a difference compared to the control variant of 15%. The obtained data over two years on average showed an increase in yield by 9% and 12% in variants treated with Oxamate and Kartolin-2 preparations.

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Histological characterization of downy mildew infection in wild rocket (Diplotaxis tenuifolia)

Pereira,

Scotti‐Campos,

Coelho

2024

Plant Pathology

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Wild rocket downy mildew (DM), caused by oomycete Hyaloperonospora sp., is a widely spread disease reducing crop production and quality. New productive wild rocket varieties resistant to DM are crucial to control disease and ensure high quality leaves. A histological characterization of Hyaloperonospora sp. infection was performed in 11 wild rocket (Diplotaxis tenuifolia) accessions with contrasting DM responses (R, resistant; PR, partially resistant; S, susceptible). Samples of infected cotyledons, first and second leaves of 14‐day‐old seedlings were collected at 3, 6, 9, 21 and 24 h post‐inoculation (hpi) and 7 days post‐inoculation (dpi) and stained for appressoria and haustoria observation and tissue necrosis evaluation. Occurrence of appressoria on host surfaces was higher in leaves compared with cotyledons but unrelated with DM resistance response. Haustoria growth in mycelium was delayed in R accessions from 3 hpi, and signs of cell hypersensitivity reaction were observed at 9 hpi. At 24 hpi, necrotic spots limited pathogen growth in resistant accessions, whilst mycelium invaded larger mesophyll areas and produced more haustoria in susceptible ones. At 7 dpi, sporulation was heavy in S, restricted to droplet deposition sites in PR, and did not occur in R hosts. A rapid response of R accessions resulted in slower mycelium growth and longer infection periods. These traits have important agronomic value and should be considered in germplasm selection for breeding programmes aimed at crop protection. A better understanding of the host response to DM infection will allow selection of more suitable wild rocket accessions in future breeding programmes.

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Comparing cotyledon, leaf and root resistance to downy mildew in radish (Raphanus sativus L.)

Cited by 4 publications

References 19 publications

Vision-Based White Radish Phenotypic Trait Measurement with Smartphone Imagery

Vision-Based White Radish Phenotypic Trait Measurement with Smartphone Imagery

Efficiency of new growth regulators in growing daikon

Histological characterization of downy mildew infection in wild rocket (Diplotaxis tenuifolia)

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