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Your search keyword '"Zou, Zhongwei"' showing total 198 results
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198 results on '"Zou, Zhongwei"'

13. Overexpression of BnNAC19 in Brassica napus enhances resistance to Leptosphaeria maculans, the blackleg pathogen of canola.

Author

Zou, Zhongwei and Fernando, W. G. Dilantha

Subjects
*RAPESEED, *LEPTOSPHAERIA maculans, *CANOLA, *DISEASE resistance of plants, *GENETIC overexpression, *PLASMODIOPHORA brassicae
Abstract

Leptosphaeria maculans is a fungal pathogen that causes blackleg disease in canola (Brassica napus), resulting in significant yield and economic losses in Canada and many parts of the world. Plant NAC transcription factors play critical roles in plant development and response to biotic or abiotic stress. In this study, we identified and characterized a BnNAC19 gene from Brassica napus. The overexpression of BnNAC19 in transgenic canola plants contributed to the improvement of seedling resistance against L. maculans. The mycelial growth of a green fluorescent protein‐tagged strain of L. maculans and production of pycnidiospores were shown to be inhibited in the transgenic canola plants overexpressing BnNAC19. In addition, the canola transgenic line overexpressing BnNAC19 showed increased disease resistance in the adult plant, which was determined by quantitative resistance. Both increased seedling and adult plant resistance in transgenic canola plants overexpressing BnNAC19 indicate that the BnNAC19 gene plays a positive role against L. maculans. The expression pattern of genes BnNAC19 upstream and downstream of BnNAC19 that participate in plant defence pathways were investigated to elucidate the B. napus resistance mechanisms to L. maculans infection, and hence to aid the long‐term blackleg disease‐resistant breeding programmes. [ABSTRACT FROM AUTHOR]

Published
2024
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30. Effect of wounding and wound age on infection of canola cotyledons by Leptosphaeria maculans, interacting with leaf wetness

Author

Huang, Shuanglong, Zhai, Chun, Zou, Zhongwei, Liu, Fei, Parks, Paula, Mcgregor, Linda, Fernando, W. G. Dilantha, and Peng, Gary

Subjects
integumentary system, food and beverages
Abstract

Blackleg, caused by the fungus Leptosphaeria maculans, is an important disease of canola. Both ascospores and pycnidiospores of the fungus can infect intact leaves under conditions of extended leaf wetness, with infection then progressing further into the stem. In western Canada, spring is typically cool and dry and additional factors may be involved for successful infection. This study was designed to assess the effect of wounding and wound age on cotyledon infection, to evaluate the likelihood that flea beetle-feeding injuries could contribute to increased disease. Infection of canola cotyledons occurred readily via mechanical wounds in the absence of leaf wetness when seedlings were spray inoculated with pycnidiospores of L. maculans, whereas no infection occurred on intact cotyledons even under 6-h leaf wetness. Wound age also played a role in susceptibility; wounded tissues were less susceptible when plants were kept in a greenhouse for 8 h or longer before inoculation, with substantially reduced infection success relative to fresh wounds. This wound-age effect was similar on susceptible and resistant canola varieties. A high temperature (25°C) seemed to favour the healing of wounds, reducing susceptibility when compared with control (21/16°C) and low (10°C) temperatures. Leaf wetness post-wounding may hinder healing, and high post-inoculation humidity (80–90% relative humidity) increased infection via older wounds slightly, relative to lower (50–60%) relative humidity. These data provide a rationale for studying the effect of improved flea beetle control on early L. maculans infection of canola.

Published
2022
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40. Sustainability on the farm: breeding for resistance and management of major canola diseases in Canada contributing towards an IPM approach.

Author

Dolatabadian, ARIA, Cornelsen, Justine, Huang, SHUANGLONG, Zou, Zhongwei, and Fernando, W.G. DILANTHA

Subjects
SUSTAINABLE agriculture, CANOLA, MOLECULAR genetics, GENETIC variation, RAPESEED, INFLUENZA, PLANT diseases
Abstract

Copyright of Canadian Journal of Plant Pathology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2022
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