Modes of entry, establishment and seed transmission ofPeronospora parasitica in radish

1990 ◽  
Vol 100 (6) ◽  
Author(s):  
P Jang ◽  
K M Safeeulla
Keyword(s):  
Seed Transmission

PLANT-SEED TRANSMISSION OF SOYBEAN IN Colletotrichum truncatum

Nucleus ◽  
2015 ◽  
Vol 12 (1) ◽  
Author(s):  
Gabrielle de Lima MASSON ◽  
Bruno Agostini COLMAN ◽  
Paulo Rogério Beltramin da FONSECA ◽  
Alexandre Dinnys ROESE
Keyword(s):  
Seed Transmission ◽  
Colletotrichum Truncatum ◽  
Plant Seed

scholarly journals Large-Scale Seedling Grow-Out Experiments Do Not Support Seed Transmission of Sweet Potato Leaf Curl Virus in Sweet Potato

Plants ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 139
Author(s):  
Sharon A. Andreason ◽  
Omotola G. Olaniyi ◽  
Andrea C. Gilliard ◽  
Phillip A. Wadl ◽  
Livy H. Williams ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Large Scale ◽  
Seed Transmission ◽  
Potato Production ◽  
Potato Leaf ◽  
Vector Transmission ◽  
Leaf Curl Virus ◽  
Seed Coats ◽  
Potato Seedlings ◽  
Leaf Curl

Sweet potato leaf curl virus (SPLCV) threatens global sweet potato production. SPLCV is transmitted by Bemisia tabaci or via infected vegetative planting materials; however, SPLCV was suggested to be seed transmissible, which is a characteristic that is disputed for geminiviruses. The objective of this study was to revisit the validity of seed transmission of SPLCV in sweet potato. Using large-scale grow-out of sweet potato seedlings from SPLCV-contaminated seeds over 4 consecutive years, approximately 23,034 sweet potato seedlings of 118 genotype entries were evaluated. All seedlings germinating in a greenhouse under insect-proof conditions or in a growth chamber were free of SPLCV; however, a few seedlings grown in an open bench greenhouse lacking insect exclusion tested positive for SPLCV. Inspection of these seedlings revealed that B. tabaci had infiltrated the greenhouse. Therefore, transmission experiments were conducted using B. tabaci MEAM1, demonstrating successful vector transmission of SPLCV to sweet potato. Additionally, tests on contaminated seed coats and germinating cotyledons demonstrated that SPLCV contaminated a high percentage of seed coats collected from infected maternal plants, but SPLCV was never detected in emerging cotyledons. Based on the results of grow-out experiments, seed coat and cotyledon tests, and vector transmission experiments, we conclude that SPLCV is not seed transmitted in sweet potato.

scholarly journals Seed Transmission of Pseudoperonospora cubensis

PLoS ONE ◽  
2014 ◽  
Vol 9 (10) ◽  
pp. e109766 ◽  
Author(s):  
Yigal Cohen ◽  
Avia E. Rubin ◽  
Mariana Galperin ◽  
Sebastian Ploch ◽  
Fabian Runge ◽  
...  
Keyword(s):  
Seed Transmission ◽  
Pseudoperonospora Cubensis

scholarly journals Distribution of Potato spindle tuber viroid in Reproductive Organs of Petunia During Its Developmental Stages

2014 ◽  
Vol 104 (9) ◽  
pp. 964-969 ◽  
Author(s):  
Yosuke Matsushita ◽  
Shinya Tsuda
Keyword(s):  
Developmental Stages ◽  
Cell Movement ◽  
Seed Transmission ◽  
Potato Spindle Tuber Viroid ◽  
Reproductive Organs ◽  
Infected Male ◽  
Infected Female ◽  
Reproductive Tissues ◽  
Healthy Female

Embryo infection is important for efficient seed transmission of viroids. To identify the major pattern of seed transmission of viroids, we used in situ hybridization to histochemically analyze the distribution of Potato spindle tuber viroid (PSTVd) in each developmental stage of petunia (flowering to mature seed stages). In floral organs, PSTVd was present in the reproductive tissues of infected female × infected male and infected female × healthy male but not of healthy female × infected male before embryogenesis. After pollination, PSTVd was detected in the developed embryo and endosperm in all three crosses. These findings indicate that PSTVd is indirectly delivered to the embryo through ovule or pollen during the development of reproductive tissues before embryogenesis but not directly through maternal tissues as cell-to-cell movement during embryogenesis.

scholarly journals Role of Soybean mosaic virus–Encoded Proteins in Seed and Aphid Transmission in Soybean

2013 ◽  
Vol 103 (9) ◽  
pp. 941-948 ◽  
Author(s):  
Sushma Jossey ◽  
Houston A. Hobbs ◽  
Leslie L. Domier
Keyword(s):  
Mosaic Virus ◽  
Seed Quality ◽  
Soybean Mosaic Virus ◽  
Seed Transmission ◽  
Aphid Transmission ◽  
Plant Introduction ◽  
Sequence Motif ◽  
Coding Region ◽  
Encoded Proteins ◽  
Seed Transmissibility

Soybean mosaic virus (SMV) is seed and aphid transmitted and can cause significant reductions in yield and seed quality in soybean (Glycine max). The roles in seed and aphid transmission of selected SMV-encoded proteins were investigated by constructing mutants in and chimeric recombinants between SMV 413 (efficiently aphid and seed transmitted) and an isolate of SMV G2 (not aphid or seed transmitted). As previously reported, the DAG amino acid sequence motif near the amino terminus of the coat protein (CP) was the major determinant in differences in aphid transmissibility of the two SMV isolates, and helper component proteinase (HC-Pro) played a secondary role. Seed transmission of SMV was influenced by P1, HC-Pro, and CP. Replacement of the P1 coding region of SMV 413 with that of SMV G2 significantly enhanced seed transmissibility of SMV 413. Substitution in SMV 413 of the two amino acids that varied in the CPs of the two isolates with those from SMV G2, G to D in the DAG motif and Q to P near the carboxyl terminus, significantly reduced seed transmission. The Q-to-P substitution in SMV 413 also abolished virus-induced seed-coat mottling in plant introduction 68671. This is the first report associating P1, CP, and the DAG motif with seed transmission of a potyvirus and suggests that HC-Pro interactions with CP are important for multiple functions in the virus infection cycle.

scholarly journals Common bacterial blight of bean: a model of seed transmission and pathological convergence

2021 ◽  
Author(s):  
Nicolas W. G. Chen ◽  
Mylène Ruh ◽  
Armelle Darrasse ◽  
Justine Foucher ◽  
Martial Briand ◽  
...  
Keyword(s):  
Bacterial Blight ◽  
Seed Transmission ◽  
Common Bacterial Blight

Fungi Associated with Garlic During the Cropping Season, with Focus on Fusarium proliferatum and F. oxysporum

2021 ◽  
Author(s):  
Letizia Mondani ◽  
Giorgio Chiusa ◽  
Paola Battilani
Keyword(s):  
Seed Transmission ◽  
Fusarium Proliferatum ◽  
Growth Stages ◽  
Sowing Time ◽  
Dry Rot ◽  
Cropping Season ◽  
Rainy Weather ◽  
Crop Growth Stage ◽  
Growing Conditions ◽  
The Impact

Fusarium proliferatum has been reported as the main causal agent of garlic dry rot during the postharvest stage, but information on this fungus during the crop growth stage is lacking. We focused on the cropping season of garlic (Allium sativum L.) in the field, until its harvest, with the aim of clarifying the role of F. proliferatum in bulb infection as well as the impact of crop growing conditions on pathogen-plant interaction. Studies were conducted in Piacenza (northern Italy) for three seasons from 2016 to 2019. Six garlic farms were sampled. A different field was sampled every year. Soil samples were recovered at sowing time for the counting of fungal colony forming units (CFU). Plant samples were collected at three growth stages, from BBCH 15 (fifth leaf visible) to BBCH 49 (ripening), for which disease severity assessment and fungi isolations were performed. Fusarium was the most frequently isolated genus, of which F. proliferatum and F. oxysporum were the dominant species. F. proliferatum registered the highest incidence in all the farms tested, but F. oxysporum was dominant in the first year of the study. F. oxysporum incidence was correlated with dry weather, whereas F. proliferatum was correlated with rainy weather. In conclusion, our result confirms the association of F. proliferatum with garlic bulbs from the crop’s early growth stages, suggesting potential seed transmission as a source of this fungal pathogen. Further studies should investigate the link between fusaria occurrence in the field and dry rot outbreaks occurring postharvest and during storage of garlic.

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