English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Pseudomonas syringae  pv.  tabaci  ( Pst ) is a hemibiotrophic bacterial pathogen responsible for tobacco wildfire disease. Although considerable research has been conducted on the tobacco plant’s tolerance to  Pst , the role of light in the responses of the photosystems to  Pst  infection is poorly understood. This study aimed to elucidate the underlying mechanisms of the reduced photosystem damage in tobacco leaves due to  Pst  infection under light conditions. Compared to dark conditions,  Pst  infection under light conditions resulted in less chlorophyll degradation and a smaller decline in photosynthetic function. Although the maximal quantum yield of photosystem II (PSII) and the activity of the photosystem I (PSI) complex decreased as  Pst  infection progressed, damage to PSI and PSII after infection was reduced under light conditions compared to dark conditions.  Pst  was 17-fold more abundant in tobacco leaves under dark compared to light conditions at 3 days post inoculation (dpi). Additionally, H 2 O 2  accumulated to a high level in tobacco leaves after  Pst  infection under light conditions; although to a lesser extent, H 2 O 2  accumulation was also significant under dark conditions. Pretreatment with H 2 O 2  alleviated chlorotic lesions and decreased  Pst  abundance in tobacco leaves at 3 dpi under dark conditions. MV pretreatment had the same effects under light conditions, whereas 3-(3,4-dichlorophenyl)-1,1-dimethylurea pretreatment aggravated chlorotic lesions and increased the  Pst  population. These results indicate that chlorotic symptoms and the size of the bacterial population are each negatively correlated with H 2 O 2  accumulation. In other words, light appears to suppress the  Pst  population in tobacco leaves through the accumulation of H 2 O 2  during infection.

Light Suppresses Bacterial Population through the Accumulation of Hydrogen Peroxide in Tobacco Leaves Infected with Pseudomonas syringae pv. tabaci