Physiological and Biochemical Responses of Tobacco at Different Growth Stages to Alternaria alternata DOI

Ping He,

Rao Wenjing,

Dong Zhikai

et al.

Journal of Phytopathology, Journal Year: 2024, Volume and Issue: 172(6)

Published: Nov. 1, 2024

ABSTRACT Tobacco brown spot, caused by Alternaria alternata (Fries) Keissler, is one of the main leaf diseases tobacco. It common in mature stage tobacco but rarely occurs early growth stage. Therefore, it also called ‘mature spot’ farmers. However, physiological and biochemical mechanisms underlying responses plants at different stages to A. remain unclear. In this experiment, was inoculated into two varieties, Yun87 HongHuaDaJinYuan (HD), immature respectively. The disease index, stomata, reactive oxygen species (OFR H 2 O ) defence enzymes (SOD, POD, PPO, CAT PAL) were analysed. Results showed that index lower than 5 days after inoculation. Stomatal opening not significantly between stages, stomatal apertures HD decreased 1%–2.33% 12 h Moreover, OFR contents higher those SOD activity stage, whereas POD PAL activities stages. Reactive began respond Specifically, peaked h, 24 h. response levels rates content, Correlation analysis revealed strength effect these factors different. general, resistance spot mediated enzymes.

Language: Английский

Molybdenum Can Regulate the Expression of Molybdase Genes, Affect Molybdase Activity and Metabolites, and Promote the Cell Wall Bio-Synthesis of Tobacco Leaves DOI Creative Commons
Yuan Zhao, Yu Zhang, Kai Zhang

et al.

Biology, Journal Year: 2025, Volume and Issue: 14(1), P. 66 - 66

Published: Jan. 14, 2025

Molybdenum (Mo) is widely used as a micronutrient fertilizer to improve plant growth and soil quality. However, the interactions between cell wall biosynthesis molybdenum have not been explored sufficiently. This study thoroughly investigated regulatory effects of different concentrations Mo on tobacco from physiological metabolomic aspects. The results indicate that treatment increased content variety K326. Moreover, it significantly up-regulated gene expression levels molybdases (NR, AO, SO, XDH) molybdate transporters in tobacco, whereby NR were upregulated by 28.48%, 52.51%, 173.05%, 246.21%, respectively; MOT1 MOT2 21.49/8.67%, 66.05/30.44%, 93.05/93.26%, 166.11/114.29%, respectively. Additionally, regulated synthesis related enzymes, effectively promoted growth, biomass dry matter accumulation, with leaves increasing 30.73%, 40.72%, 46.34%, 12.88%, FT-NIR spectroscopy after was applied soil, quantity C-O-C, -COOH, C-H, N-H functional groups increased. Concurrently, contents cellulose, hemicellulose, lignin, protopectin, soluble pectin increased, wherein hemicellulose 31.01/288.82%, 40.69/343.43%, 69.93/241.73%, 196.88/223.26%, Furthermore, walls thickened, ability withstand disturbances. metabolic network diagrams galactose metabolism, arginine proline acid biosynthesis. carbohydrates, spermidine, proline, quinic acid, IAA, flavonoids, other substances polysaccharides within wall, controlling lignin production, successfully enhancing resistance abiotic stress. These offer important perspectives for further investigations into role trace elements.

Language: Английский

Citations

1
Comparative effects of biocontrol agent and pathogen on Nicotiana tabacum : insights into fungal-plant interactions DOI Creative Commons

Quanyu Yin,

Zhichao Ren,

Dongling Wu

et al.

Plant Signaling & Behavior, Journal Year: 2025, Volume and Issue: 20(1)

Published: Jan. 16, 2025

Tobacco (Nicotiana tabacum) black shank disease, caused by Phytophthora nicotianae, is a significant threat to tobacco crops, leading severe economic losses. Prolonged use of agrochemicals control this disease has prompted the exploration eco-friendly biological strategies. This study investigated effects Trichoderma harzianum, biocontrol agent, on N. tabacum in comparison P. focusing growth, biomass, root morphology and anatomy, hormonal changes, osmotic regulation. T. harzianum significantly enhanced plant biomass accumulation, system development, physiological attributes such as photosynthetic pigment levels antioxidant enzyme activity. In contrast, nicotianae negatively impacted these parameters, inhibiting growth function. Notably, increased proline content induced resistance mechanisms, mitigating stress promoting overall health. These findings highlight potential sustainable solution for managing while improving crop productivity.

Language: Английский

Citations

1
The effect of mixed microbial agents on tobacco black shank disease DOI
Fang Liang,

Chai Yunxia,

Yuanyuan Li

et al.

Physiological and Molecular Plant Pathology, Journal Year: 2024, Volume and Issue: 134, P. 102442 - 102442

Published: Oct. 12, 2024

Language: Английский

Citations

0
Physiological and Biochemical Responses of Tobacco at Different Growth Stages to Alternaria alternata DOI

Ping He,

Rao Wenjing,

Dong Zhikai

et al.

Journal of Phytopathology, Journal Year: 2024, Volume and Issue: 172(6)

Published: Nov. 1, 2024

ABSTRACT Tobacco brown spot, caused by Alternaria alternata (Fries) Keissler, is one of the main leaf diseases tobacco. It common in mature stage tobacco but rarely occurs early growth stage. Therefore, it also called ‘mature spot’ farmers. However, physiological and biochemical mechanisms underlying responses plants at different stages to A. remain unclear. In this experiment, was inoculated into two varieties, Yun87 HongHuaDaJinYuan (HD), immature respectively. The disease index, stomata, reactive oxygen species (OFR H 2 O ) defence enzymes (SOD, POD, PPO, CAT PAL) were analysed. Results showed that index lower than 5 days after inoculation. Stomatal opening not significantly between stages, stomatal apertures HD decreased 1%–2.33% 12 h Moreover, OFR contents higher those SOD activity stage, whereas POD PAL activities stages. Reactive began respond Specifically, peaked h, 24 h. response levels rates content, Correlation analysis revealed strength effect these factors different. general, resistance spot mediated enzymes.

Language: Английский

Citations

0