Article
Plant Sciences
Nikolett Kaszler, Peter Benko, Dora Bernula, Agnes Szepesi, Attila Feher, Katalin Gemes
Summary: In the short term, the application of Spd may increase the relative expression of polyamine synthesis enzymes in plant regeneration; however, the role of oxidase may also affect shoot meristem formation.
Review
Biochemistry & Molecular Biology
Peter Benko, Katalin Gemes, Attila Feher
Summary: The metabolism and regulation of cellular polyamines play a crucial role in maintaining cell homeostasis and function. Polyamine oxidases (PAOs) generate hydrogen peroxide (H2O2) during catabolic and back-conversion processes, which has been found to be involved in various plant developmental processes and stress responses. The relationship between PAOs and NADPH oxidases (RBOHs) in controlling cellular reactive oxygen species is discussed, suggesting that these enzymes regulate each other's abundance/function indirectly through H2O2.
Article
Biochemistry & Molecular Biology
Yu-Yan An, Jing Li, Yu-Xin Feng, Zhi-Mao Sun, Zhong-Qi Li, Xiao-Ting Wang, Mei-Xiang Zhang, Jun-Min He
Summary: In darkness, COP1 plays a role in dark-induced stomatal closure by transducing H2O2 signaling, suppressing the expression of FT, TSF, and SOC1, promoting NO accumulation in guard cells, and leading to stomatal closure.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Plant Sciences
Young-Sun Riu, Hyun-Geun Song, Hwi-Su Kim, Sam-Geun Kong
Summary: This study used different promoters to alter the response characteristics and growth phenotypes of phototropins in transgenic plants, as well as improve leaf transpiration.
Article
Plant Sciences
Nikolett Kaszler, Peter Benko, Arpad Molnar, Abigel Zambori, Attila Feher, Katalin Gemes
Summary: Arabidopsis POLYAMINE OXIDASE 5 (AtPAO5) is found to contribute to the formation of shoot meristems (SMs) from lateral root primordia (LRPs) by regulating the thermospermine (T-Spm) level and controlling cytokinin sensitivity. The expression of AtGLB1 and AtGLB2, which enhance cytokinin sensitivity, is downregulated in the pao5-2 mutant and with exogenous T-Spm treatment. This indirectly inhibits the expression of type-A ARABIDOPSIS RESPONSE REGULATORs (ARRs) and leads to upregulation of ARR-coding genes in the pao5-2 mutant.
Article
Biochemistry & Molecular Biology
Teng-Yue Zhang, Zhong-Qi Li, Yu-Dong Zhao, Wen-Jie Shen, Meng-Shu Chen, Hai-Quan Gao, Xiao-Min Ge, Hui-Qin Wang, Xue Li, Jun-Min He
Summary: The study reveals that MPK3 and MPK6 play crucial roles in ethylene signaling by interacting with MKK1, MKK3, and EIN2 to promote stomatal closure. However, this effect is impaired in certain mutants, leading to a disruption in signal transduction pathways.
JOURNAL OF INTEGRATIVE PLANT BIOLOGY
(2021)
Article
Plant Sciences
Qikun Zhang, Xiuru Dai, Huanpeng Wang, Fanhua Wang, Dongxue Tang, Chunyun Jiang, Xiaoyan Zhang, Wenjing Guo, Yuanyuan Lei, Changle Ma, Hui Zhang, Pinghua Li, Yanxiu Zhao, Zenglan Wang
Summary: This study investigates the effects of H2O2 pretreatment on the salt tolerance of Arabidopsis seedlings. The results show that appropriate concentrations of H2O2 pretreatment enhance the salt tolerance ability of Arabidopsis seedlings. This is evidenced by lower Na+ levels, greater K+ levels, and improved K+/Na+ ratios in leaves. H2O2 pretreatment also improves membrane properties, reduces relative membrane permeability and malondialdehyde content, and enhances the activities of antioxidant enzymes. Furthermore, H2O2 pretreatment induces the expression of genes related to cell cycle, redox regulation, and cell wall organization in Arabidopsis, which may contribute to improved tolerance to osmotic stress and better adaptation to high-salt environments.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Yue Zhang, Yanhuang An, Ning Yang, Wei Wang, Ruirui Liu, Run Gao, Yaping Zhou
Summary: Oridonin influences the root growth of Arabidopsis thaliana by regulating PLC1 and H2O2, with high concentrations inhibiting root growth.
JOURNAL OF PLANT GROWTH REGULATION
(2022)
Article
Biochemistry & Molecular Biology
Jianyu Yang, Pengju Wang, Suzhi Li, Tao Liu, Xiaohui Hu
Summary: Exogenous spermidine can enhance tomato's tolerance to saline-alkaline stress by regulating the antioxidant system and H2O2 levels.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Biochemistry & Molecular Biology
Lisa David, Jianing Kang, Josh Nicklay, Craig Dufresne, Sixue Chen
Summary: This study demonstrates that SAR induces altered responses of stomata to pathogens in systemic leaves, with guard cell defense depending on the protein DIR1. By using a multi-omics approach, potential signaling mechanisms specific to guard cells during SAR were identified, which may lead to new avenues for genetic modification and molecular breeding of disease-resistant plants.
FRONTIERS IN MOLECULAR BIOSCIENCES
(2021)
Article
Plant Sciences
David Israel, Seong Hee Lee, Thomas Matthew Robson, Janusz Jerzy Zwiazek
Summary: This study demonstrates the physiological relevance of plasma membrane aquaporins (PIPs) in the diffusion of H2O2 in Arabidopsis thaliana roots. Specific PIPs, such as PIP2;3, PIP1;1, and PIP2;6, have been identified to facilitate H2O2 diffusion and play a role in regulating stress responses.
Article
Biochemistry & Molecular Biology
Jinyoung Moon, Soon Young Kim, Chan-Ho Park, Seong-Ki Kim
Summary: The study found that ACO2 is highly expressed in the shoots of Arabidopsis seedlings under light conditions, with exogenous ACC enhancing its expression and Co2+ ions suppressing it. The expression of the ethylene synthesis gene ACO2 is regulated by exogenous brassinolide and endogenous brassinosteroid BR in Arabidopsis seedlings.
PLANT SIGNALING & BEHAVIOR
(2021)
Article
Biochemistry & Molecular Biology
Lili Zhang, Jiabao Huang, Shiqi Su, Xiaochun Wei, Lin Yang, Huanhuan Zhao, Jianqiang Yu, Jie Wang, Jiyun Hui, Shiya Hao, Shanshan Song, Yanyan Cao, Maoshuai Wang, Xiaowei Zhang, Yanyan Zhao, Zhiyong Wang, Weiqing Zeng, Hen-Ming Wu, Yuxiang Yuan, Xiansheng Zhang, Alice Y. Cheung, Qiaohong Duan
Summary: Self-incompatibility (SI) mechanisms in plants involve the recognition of self-pollen by specific interactions between pollen ligands and stigma receptors, culminating in the rejection of self-pollen. This study reveals that in heading Chinese cabbage, high levels of reactive oxygen species (ROS) produced in stigma papilla cells mediate the SI response, leading to the rejection of self-pollen.
Article
Plant Sciences
Yoshitake Desaki, Minami Morishima, Yuka Sano, Takuya Uemura, Ayaka Ito, Keiichirou Nemoto, Akira Nozawa, Tatsuya Sawasaki, Gen-ichiro Arimura
Summary: Plants defend against folivores by activating signaling cascade networks to respond to folivore-derived elicitors. In Arabidopsis, the protein kinase HAK1 mediates the upregulation of defense genes in response to polysaccharide elicitors from Spodoptera litura larvae through the cytoplasmic kinase PBL27. This study investigated the involvement of other protein kinases, including CPKs and CRKs, in the intracellular signaling network for anti-herbivore responses. The findings suggest that CRK2, in addition to CRK3, interacts with PBL27 to regulate the transcriptional regulation of PDF1.2, a defense gene against S. litura larvae.
Article
Plant Sciences
Alvin Sanjaya, Ryohsuke Muramatsu, Shiho Sato, Mao Suzuki, Shun Sasaki, Hiroki Ishikawa, Yuki Fujii, Makoto Asano, Ryuuichi D. Itoh, Kengo Kanamaru, Sumie Ohbu, Tomoko Abe, Yusuke Kazama, Makoto T. Fujiwara
Summary: The EGY1 gene encodes a protease involved in chloroplast development in leaf mesophyll cells but is also crucial for chloroplast differentiation in the leaf epidermis, particularly in guard cells. This study revealed that EGY1 mutants showed severe chlorophyll deficiency in both epidermal cell types and exhibited permanent defects in chloroplast formation, highlighting the importance of EGY1 in chloroplast formation and differentiation in leaf tissues.
Article
Plant Sciences
Ricky J. Milne, Katherine E. Dibley, Wendelin Schnippenkoetter, Martin Mascher, Andy C. W. Lui, Lanxiang Wang, Clive Lo, Anthony R. Ashton, Peter R. Ryan, Evans S. Lagudah
Article
Plant Sciences
Pui Ying Lam, Andy C. W. Lui, Masaomi Yamamura, Lanxiang Wang, Yuri Takeda, Shiro Suzuki, Hongjia Liu, Fu-Yuan Zhu, Mo-Xian Chen, Jianhua Zhang, Toshiaki Umezawa, Yuki Tobimatsu, Clive Lo
Article
Plant Sciences
Lanxiang Wang, Moxian Chen, Fuyuan Zhu, Tao Fan, Jianhua Zhang, Clive Lo
Article
Plant Sciences
Andy C. W. Lui, Pui Ying Lam, Kwun Ho Chan, Lanxiang Wang, Yuki Tobimatsu, Clive Lo
Article
Plant Sciences
Lanxiang Wang, Pui Ying Lam, Andy C. W. Lui, Fu-Yuan Zhu, Mo-Xian Chen, Hongjia Liu, Jianhua Zhang, Clive Lo
JOURNAL OF EXPERIMENTAL BOTANY
(2020)
Letter
Biotechnology & Applied Microbiology
Lanxiang Wang, Andy C. W. Lui, Pui Ying Lam, Guoquan Liu, Ian D. Godwin, Clive Lo
PLANT BIOTECHNOLOGY JOURNAL
(2020)
Review
Plant Sciences
Pui Ying Lam, Andy C. W. Lui, Lanxiang Wang, Hongjia Liu, Toshiaki Umezawa, Yuki Tobimatsu, Clive Lo
Summary: Tricin is a specialized metabolite found in plants that plays a crucial role in stress tolerance and defense responses, particularly as a lignin monomer with unique biological functions. Research has focused on identifying and characterizing tricin biosynthetic enzymes and pathways in grasses and tricin-accumulating dicots.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Plant Sciences
Yue Liu, Yuan Tian, Lan-Xiang Wang, Tao Fan, Jianhua Zhang, Mo-Xian Chen, Ying-Gao Liu
Summary: This study systematically identified 112 U2A genes from 80 plant species and highlighted the conserved functions and responses to internal and external stimuli of these genes in plants, with a particular emphasis on a conserved alternative splicing event in the fifth intron.
Article
Plant Sciences
Feng Yang, Chao-han Li, Debatosh Das, Yu-hong Zheng, Tao Song, Lan-xiang Wang, Mo-Xian Chen, Qing-zhu Li, Jianhua Zhang
Summary: This study sequenced and analyzed the transcriptome of pink and white petals of Lycoris sprengeri, identifying the crucial role of anthocyanin biosynthesis in regulating petal color development.
FRONTIERS IN PLANT SCIENCE
(2021)
Review
Biochemistry & Molecular Biology
Pui Ying Lam, Lanxiang Wang, Clive Lo, Fu-Yuan Zhu
Summary: Plant metabolism plays a crucial role in plant survival, growth, development, and interaction with the environment. It is tightly regulated at transcriptional, post-transcriptional, translational, and post-translational levels in response to different growth stages and changing environment. Alternative splicing, a post-transcriptional regulatory mechanism, generates multiple protein isoforms from a single gene and regulates plant metabolism by altering biochemical activities, protein interactions, and subcellular localization.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Editorial Material
Microbiology
Lanxiang Wang, Moxian Chen, Pui-Ying Lam, Francisco Dini-Andreote, Lei Dai, Zhong Wei
Summary: This comprehensive review discusses the multiple roles of flavonoids in mediating plant-microbe interactions, including their synthesis, transport, and exudation in plants, the importance of flavonoids in regulating plant-microbe interactions, and how flavonoids influence the overall community assembly of plant-root microbiomes. The review also highlights potential knowledge gaps in understanding how flavonoids determine the interactions between plants and commensal microbes, advocating for further research in this area for innovative strategies to manipulate plant-microbiome composition.
Review
Plant Sciences
Lydia Pui Ying Lam, Lanxiang Wang, Andy C. W. Lui, Hongjia Liu, Toshiaki Umezawa, Yuki Tobimatsu, Clive Lo
Summary: This review summarizes the distribution, functions, biosynthesis and regulation of flavonoids in grasses, focusing on model cereal grasses. It highlights the constitutive, predominant and widespread flavonoids as well as the inducible and/or lineage-specific flavonoids in grasses. Finally, it discusses the impacts and importance of cereal grass flavonoids on scientific research, agricultural production, food and health, and biorefinery.
PHYTOCHEMISTRY REVIEWS
(2023)
Article
Multidisciplinary Sciences
Andy C. W. Lui, Kah Chee Pow, Nan Lin, Lydia Pui Ying Lam, Guoquan Liu, Ian D. Godwin, Zhuming Fan, Chen Jing Khoo, Yuki Tobimatsu, Lanxiang Wang, Quan Hao, Clive Lo
Summary: The study reveals that sorghum and wild sugarcane accumulate different types of O-methylated stilbenes due to major differences in catalytic regioselectivities of O-methyltransferases. This research reports the inherent ability of two Saccharinae grasses to produce regioselectively O-methylated stilbenes. The findings have important implications for the bioengineering synthesis of O-methylated stilbenes.
NATURE COMMUNICATIONS
(2023)
Article
Plant Sciences
Pui Ying Lam, Lanxiang Wang, Andy C. W. Lui, Hongjia Liu, Yuri Takeda-Kimura, Mo-Xian Chen, Fu-Yuan Zhu, Jianhua Zhang, Toshiaki Umezawa, Yuki Tobimatsu, Clive Lo
Summary: This study investigates the formation of tricin-incorporated lignin and its effects on cell wall properties in rice mutants deficient in early flavonoid biosynthetic genes. The results show that the mutants lacking CHS, CHI, and CHIL are depleted of extractable flavones and tricin-lignin in the cell walls. However, the cell wall saccharification efficiencies of these mutants are similar to that of the wild-type controls, suggesting the complex metabolic consequences of tricin pathway perturbations and the relationship between lignin profiles and cell wall properties.
Article
Biochemistry & Molecular Biology
Qian Zhou, Lanxiang Wang, Bin Liu, Jianbo Xiao, Ka-Wing Cheng, Feng Chen, Mingfu Wang
Summary: The extract of rose flower shows significant anti-alcohol and hepatoprotective effects by partially reducing ethanol-induced cell apoptosis through the activation of the AMPK/SIRT1 signaling pathway. A specific component, N1,N5,N10-(E)-tri-p-coumaroylspermidine, in this extract exhibits remarkable hepatoprotective activity.
