Article
Horticulture
Chong Du, Fengyi Shen, Yue Li, Zhentong Zhao, Xiangyang Xu, Jingbin Jiang, Jingfu Li
Summary: The Mi-3 gene in tomatoes retains resistance under high-temperature conditions and mainly operates in the early stages of nematode infection. Analysis of key plant hormone pathways showed that synthesis of salicylic acid and jasmonic acid was high in plants at 25 degrees Celsius, potentially contributing to disease resistance mediated by Mi-3. Additionally, up-regulation of genes involved in the biosynthesis of plant hormones and active oxygen synthesis at 25 degrees Celsius indicates a positive role of reactive oxygen species in Mi-3-mediated disease resistance.
SCIENTIA HORTICULTURAE
(2021)
Article
Plant Sciences
Zalan Czekus, Gabriella Szalai, Irma Tari, M. Iqbal R. Khan, Peter Poor
Summary: This study investigated the role of ethylene (ET) in endoplasmic reticulum (ER) stress and unfolded protein response (UPR) in tomato leaves. The results showed that exogenous application of the ET precursor increased ET emission and upregulated UPR marker genes and ER stress sensor genes in tomato leaves. ET was found to play a significant role in Tm-induced ER stress sensing and signaling, affecting the levels of salicylic acid. Additionally, ET regulated nitric oxide production, lipid peroxidation, and electrolyte leakage, but seemed to have no effect on H2O2 levels and proteolytic activity under ER stress in tomato leaves.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2022)
Review
Biochemistry & Molecular Biology
Thomas Svoboda, Michael R. Thon, Joseph Strauss
Summary: This review analyzes the role of plant hormones in Colletotrichum infections, revealing that different strains of Colletotrichum are capable of auxin production, which may contribute to their virulence. The authors propose auxin biosynthetic pathways in Colletotrichum spp. in the context of plant-Colletotrichum interactions.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Review
Plant Sciences
Hongqiu Zeng, Yujing Bai, Yunxie Wei, Russel J. Reiter, Haitao Shi
Summary: Melatonin plays important roles in plant immunity and pathogenicity through multiple mechanisms.
JOURNAL OF EXPERIMENTAL BOTANY
(2022)
Article
Plant Sciences
Charitha P. A. Jayasinghege, Jocelyn A. Ozga, Victor P. Manolii, Sheau-Fang Hwang, Stephen E. Strelkov, Martin Cerny, Veronika Hyskova
Summary: This study investigated the effect of clubroot, a soilborne disease caused by Plasmodiophora brassicae, on plant hormones in Brassica napus. The results showed that the pathogen modulated plant hormonal networks, leading to increased levels of SA and ABA in susceptible plants, and decreased levels of JA. This modulation of plant hormones could be important for understanding plant defense mechanisms against clubroot.
Article
Plant Sciences
Qian Cheng, Guoying Zhao, Liu Yang, Asma Amdouni, Bangbang Mu, Chaofei Ye, Yuting Zhao, Xiaolin Cheng, Xing Cui, Peiyu Zhao, Hanfeng Zhang, Yu Ma, Yuan-Qing Jiang, Bo Yang
Summary: In this study, the researchers found that BnaMPK1 in oilseed rape acts as a positive regulator of ROS- and JA-dependent leaf senescence by promoting cell death and phosphorylation activity.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2022)
Article
Biochemistry & Molecular Biology
Katariina Vuorinen, Olena Zamora, Lauri Vaahtera, Kirk Overmyer, Mikael Brosche
Summary: Plants require interaction between different signaling pathways, including hormones like ethylene, salicylic acid, and jasmonic acid, to respond to stress and deploy defenses. Reactive oxygen species also play a crucial role as signaling molecules in early defense responses. Research has shown that hormone signaling is important for plant resistance to pathogens, and the transcription factor SRI_ is identified as a key regulator of plant defensin expression and cell death.
MOLECULAR PLANT-MICROBE INTERACTIONS
(2021)
Review
Plant Sciences
Dibyendu Ghosh, Supriya Chakraborty
Summary: Geminiviruses pose a global threat to plant hosts, but plants combat this threat through a strong antiviral immune response mediated by phytohormones.
JOURNAL OF EXPERIMENTAL BOTANY
(2021)
Article
Plant Sciences
Niels Aerts, Marciel Pereira Mendes, Saskia C. M. Van Wees
Summary: Plant hormones play a crucial role in regulating plant interactions with their environment. Hormone crosstalk, involving synergistic, antagonistic, and additive interactions, is essential for tailoring plant responses to diverse microbes and insects. Recent advances have shed light on the mechanisms of hormone crosstalk regulation in plant defense.
Article
Plant Sciences
Daoyong Yang, Qiding Peng, Yongchao Cheng, Dehui Xi
Summary: G6PDH negatively regulates viral accumulation in Nicotiana benthamiana through RBOHB-associated ROS signaling. Anti-oxidative metabolism and phytohormone-mediated immunity responses play important roles in virus infection.
Article
Plant Sciences
Shiori Takasato, Takuya Bando, Kouhei Ohnishi, Masayuki Tsuzuki, Yasufumi Hikichi, Akinori Kiba
Summary: In Nicotiana benthamiana, PLC3-1 and -2 act together to regulate the hypersensitive response and maintain immune response through multiple signaling pathways. The knockdown of NbPLC3s enhances HR-related cell death, reduces bacterial population, and upregulates the expression of Nbhin1. This study highlights the role of NbPLC3s in fine-tuning plant immune responses.
JOURNAL OF EXPERIMENTAL BOTANY
(2023)
Article
Biochemistry & Molecular Biology
Nadeem Iqbal, Zalan Czekus, Peter Poor, Attila Ordog
Summary: This review focuses on the harmful effects of Fumonisin B1 on plants and the mechanism of plant cell death induced by FB1, emphasizing the important role of sphingolipids and defense phytohormones in this process. Different crops show varying degrees of resistance to FB1 exposure. The study also highlights the regulation of PCD and defense mechanisms at physiological, biochemical, and molecular levels.
CHEMICO-BIOLOGICAL INTERACTIONS
(2021)
Review
Biochemistry & Molecular Biology
Md Mahadi Hasan, Md Atikur Rahman, Milan Skalicky, Nadiyah M. Alabdallah, Muhammad Waseem, Mohammad Shah Jahan, Golam Jalal Ahammed, Mohamed M. El-Mogy, Ahmed Abou El-Yazied, Mohamed F. M. Ibrahim, Xiang-Wen Fang
Summary: This article explores the effects of ozone on stomatal regulation focusing on the role of phytohormones in guard cell signaling. It updates existing knowledge on physiological mechanisms related to stomatal regulation after ozone response, deepening understanding of molecular pathways associated with ozone stress response. After summarizing the findings and noting gaps in the literature, some future research directions on ozone stress in plants are proposed.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Review
Biochemistry & Molecular Biology
Caroline Lelarge-Trouverie, Mathias Cohen, Lug Tremulot, Frank Van Breusegem, Amna Mhamdi, Graham Noctor
Summary: Through the study of the cat2 mutant in Arabidopsis, which lacks the major leaf isoform of catalase, we are able to investigate the potential impact of intracellular H2O2 on plant function. Our analysis focused on the salicylic acid and jasmonic acid pathways reveals metabolic signatures associated with oxidative stress-induced signaling via these defense hormones. We also identify specific enzymes and genes involved in the glucosylation of SA and the production of dihydroxybenzoic acid glycosides.
FREE RADICAL BIOLOGY AND MEDICINE
(2023)
Article
Agronomy
Rui Huang, Canying Li, Mi Guo, Hengping Xu, Shuran Zhang, Miao Wang, Yonghong Ge
Summary: The current study found that dipping `Qiujin' apples in caffeic acid significantly inhibited respiratory rate, ethylene release rate, and hydrogen peroxide accumulation. It also increased the levels of reduced glutathione and ascorbic acid in the apples. Caffeic acid improved the activities and gene expressions of several key enzymes in the fruit, and suppressed senescence after harvest.
POSTHARVEST BIOLOGY AND TECHNOLOGY
(2022)
Review
Plant Sciences
Peter Poor, Kashif Nawaz, Ravi Gupta, Farha Ashfaque, M. Iqbal R. Khan
Summary: Studies have shown that ethylene plays a crucial role in plant responses to heat stress, and regulating ethylene can enhance heat tolerance in plants, but excessive ethylene may inhibit plant growth responses.
PLANT CELL REPORTS
(2022)
Article
Entomology
Liliana Toth, Peter Poor, Attila ordog, Gyorgyi Varadi, Attila Farkas, Csaba Papp, Gabor Bende, Gabor K. Toth, Gabor Rakhely, Florentine Marx, Laszlo Galgoczy
Summary: Plant pathogenic fungi cause significant losses in crop production worldwide. Developing new strategies for plant and crop protection is crucial due to the resistance of these fungi to approved chemical fungicides. A study investigated the potential of using extracellular antifungal proteins (AFPs) and their peptide derivatives (PDs) as combinatorial biofungicides for plant and crop protection. The study found that the combination of AFPs and PDs can effectively inhibit the growth of various fungi and mitigate the symptoms of fungal infection on tomato plants.
Article
Plant Sciences
Nadeem Iqbal, Zalan Czekus, Cserne Angeli, Tibor Bartok, Peter Poor, Attila Ordog
Summary: This study investigates the role of ethylene in the production and metabolism of reactive oxygen species in tomato leaves and elucidates the phytotoxic effects of FB1 on photosynthetic activity and antioxidant mechanisms. The results show that FB1 exposure leads to ethylene emission and affects photosynthetic parameters, activating photoprotective mechanisms. Ethylene is found to play a role in cell death induction and defense mechanisms under mycotoxin exposure.
JOURNAL OF PLANT GROWTH REGULATION
(2023)
Article
Plant Sciences
Nadeem Iqbal, Zalan Czekus, Peter Poor, Attila Ordog
Summary: The study explored the time-dependent effects of FA concentrations on ROS regulation in tomato leaves. Both genotypes showed increased superoxide and H2O2 accumulation under FA exposure, with Nr genotype being more sensitive. Nr also exhibited higher lipid peroxidation and lower antioxidant enzyme activities compared to WT. ET was found to play a regulatory role in activating enzymatic and non-enzymatic antioxidants to detoxify excess ROS accumulation.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2023)
Editorial Material
Plant Sciences
Nafees A. Khan, Antonio Ferrante, M. Iqbal R. Khan, Peter Poor
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Agronomy
Lamnganbi Mutum, Tibor Janda, Eva Darko, Gabriella Szalai, Kamiran Aron Hamow, Zoltan Molnar
Summary: The aim of this study was to evaluate the effects of selected microalgae strains on germination ability and physiological processes in winter wheat plants. The results showed that different strains had varying impacts on germination, with some strains improving the process while others performed worse than the control. Microalgae biomass exhibited auxin-like activity, particularly in strain MACC-612, which had the highest level of indole-3-acetic-acid. Foliar spray of microalgae biomass did not significantly affect photosynthesis, but it did alter the composition of secondary metabolites and plant hormones. The application of certain microalgae strains can effectively improve wheat seed germination and modify acclimation processes in a genotype-dependent manner.
Article
Plant Sciences
Tihana Marcek, Kamiran Aron Hamow, Tibor Janda, Eva Darko
Summary: High voltage electrical discharge (HVED) is an eco-friendly low-cost method that stimulates germination and growth in wheat seedlings through the release of electrical discharge in water. The HVED-induced hormonal and metabolic changes during wheat germination were studied, revealing the upregulation of abscisic acid and polyphenols in the root, and the synthesis of jasmonic acid, cinnamic acid, p-coumaric acid, and caffeic acid in the shoot.
Article
Plant Sciences
Zalan Czekus, Atina Martics, Boglarka Pollak, Andras Kukri, Irma Tari, Attila Ordog, Peter Poor
Summary: This study investigates the role of the phytohormone ethylene in plant defence responses induced by the bacterial elicitor flg22. The results demonstrate that both local and systemic ethylene production, as well as active ethylene signaling, are essential for the development of rapid defence responses to flg22.
JOURNAL OF PLANT PHYSIOLOGY
(2023)
Article
Plant Sciences
Andras Cseh, Andrea Lenyko-Thegze, Diana Makai, Fanni Szabados, Kamiran Aron Hamow, Zsolt Gulyas, Tibor Kiss, Ildiko Karsai, Blanka Moncsek, Edit Mihok, Adel Sepsi
Summary: Mutations in wheat genes Rht-B1a and Rht-D1a cause gibberellin-insensitive dwarfism and have played a crucial role in increasing yield during the 'Green Revolution'. Heat stress during the early reproductive stage negatively impacts the fertility of Rht-B1b and Rht-D1b wheat lines. Chromosome synapsis defects and meiotic errors contribute to reduced fertility. The identification and incorporation of new dwarfing alleles is important for developing climate-resilient wheat varieties.
Article
Agronomy
Agnes Galle, Mate Farkas, Alina Pelsoczi, Zalan Czekus, Andras Kukri, Zita Dorner, Attila Oerdoeg, Jolan Csiszar, Krisztina Bela, Peter Poor
Summary: This study aimed to investigate the role of different glutathione transferases in the response to herbicide treatment and to determine how the antioxidant and detoxification response changes in the presence and absence of light. The results showed that the transcriptional upregulation of GST genes may contribute to the greater and more successful response of wheat to herbicide treatment.
Article
Biochemistry & Molecular Biology
Agnes Szepesi, Laszlo Bakacsy, Attila Feher, Henrietta Kovacs, Peter Palfi, Peter Poor, Reka Szollosi, Orsolya Kinga Gondor, Tibor Janda, Gabriella Szalai, Christian Lindermayr, Laszlo Szabados, Laura Zsigmond
Summary: Polyamine catabolism mediated by amine oxidases is important for regulating polyamine homeostasis and related mechanisms during salt stress. The effects of L-aminoguanidine (AG), an inhibitor of copper amine oxidases, on tomato roots exposed to short-term salt stress were studied. AG treatment alleviated the increase in reactive oxygen and nitrogen species caused by salt stress, suggesting its possible antioxidant effect.
Article
Plant Sciences
Zalan Czekus, David Milodanovic, Peter Koprivanacz, Krisztina Bela, Maria F. Lopez-Climent, Aurelio Gomez-Cadenas, Peter Poor
Summary: In this study, the researchers investigated the effect of salicylic acid (SA) on glutathione metabolism under endoplasmic reticulum (ER) stress. They found that SA levels influenced the expression of UPR marker gene SlBiP and regulated the accumulation of reduced and oxidized glutathione. Additionally, SA also modulated the activities of glutathione reductase, dehydroascorbate reductase, and glutathione S-transferases in response to ER stress.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2023)