Article
Environmental Sciences
Ines Leitao, Miguel Pedro Mourato, Luisa Carvalho, Maria Conceicao Oliveira, Maria Matilde Marques, Luisa Louro Martins
Summary: Carbamazepine, a commonly used anti-epileptic drug, has been found in wastewater and can be absorbed by plants like lettuce, leading to oxidative stress in the plants. The study showed that CBZ induced oxidative stress in lettuce plants, with increased levels of hydrogen peroxide and malondialdehyde. Antioxidative enzymes like SOD, CAT, GPOD, APX played important roles in leaves, while CAT, GPOD, and GR showed increased activity in roots.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Jintao Zhuo, Hong Wang, Yifei Du, Mengmeng Shi, Li Huan, Guangce Wang
Summary: Since 2007, the biggest green tide in the world, caused by the green macroalgal species Ulva prolifera, has occurred in the Yellow Sea of China, leading to harmful ecological impacts and economic losses. Under salt stress, genes related to salt resistance, photosynthesis, and carbon fixation pathways in U. prolifera are upregulated. These findings provide insights into the molecular mechanisms of U. prolifera's response to salinity change and contribute to the analysis of the green tide outbreak mechanism.
Article
Biology
Kai Gu, Yuling Liu, Ting Jiang, Chuner Cai, Hui Zhao, Xuanhong Liu, Peimin He
Summary: High light stress inhibits the assimilation process, destroys cellular structure, and inhibits respiration in Ulva prolifera. The algae respond to high light stress by activating genes associated with photosynthetic pigment synthesis, optical system I, and electronic transport. They can compensate ATP defects through circulating electronic transport and reduce NADPH production by attenuating photosystem II synthesis. The carbon fixed approach of Ulva prolifera shifts from the C3 pathway to the C4 pathway. This research provides theoretical basis for studying the outbreak of green tide in the Yellow Sea.
Article
Biochemistry & Molecular Biology
Siqi Zuo, Feiyu Li, Xiu Gu, Zhengpeng Wei, Leke Qiao, Chunying Du, Yongzhou Chi, Ruizhi Liu, Peng Wang
Summary: Polysaccharides derived from seaweeds can enhance wheat resistance to osmotic stress by promoting seedling growth and increasing antioxidant capacity. Exogenously applied low molecular weight polysaccharides can regulate stress-related gene expression and promote proline accumulation, ultimately improving plant response to environmental stressors.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Plant Sciences
Ines Leitao, Luisa L. Martins, Luisa Carvalho, M. Conceicao Oliveira, M. Matilde Marques, Miguel P. Mourato
Summary: The study found that contamination of lettuce plants with acetaminophen (ACT) can induce oxidative stress and increase stress indicators, while also causing significant changes in the enzymatic activities related to the antioxidative system. Additionally, ACT has a specific impact on the glutathione cycle in contaminated leaves, and induces an antioxidative response in lettuce plants with significant increases in anthocyanin content.
Article
Biotechnology & Applied Microbiology
Meihua Fan, Zhi Liao, JianXin Wang, Xiaolin Zhang, Peng Li, Mengxiong Yin
Summary: The study systematically investigated the cellular metabolism profile of Ulva prolifera exposed to HAuCl4, revealing significant changes in metabolites and specific metabolic pathways associated with cellular stress response and AuNP synthesis. The analysis identified novel metabolic pathways specifically regulated by HAuCl4, shedding light on the toxicity mechanisms and synthesis of AuNPs in macroalgae.
JOURNAL OF APPLIED PHYCOLOGY
(2021)
Article
Fisheries
Wandi Qie, Yanyan Yu, Mingshan Zheng, Jianan Jiang, Wenrong Zhu, Nianjun Xu, Yahe Li
Summary: The growth of Ulva prolifera is enhanced by moderate diurnal temperature difference, with the highest growth rate observed at 22-18 degrees C. Increase in diurnal temperature difference leads to decrease in chlorophyll a content, respiration rate, photosynthetic rate, and net photosynthetic rate, while the maximum quantum yield is enhanced. The SOD activity and soluble protein content decrease and then increase with the increase in diurnal temperature difference gradient.
AQUACULTURE INTERNATIONAL
(2023)
Article
Cell Biology
Lin Zhu, Shulei He, Lu Huang, Dongni Ren, Tiejian Nie, Kai Tao, Li Xia, Fangfang Lu, Zixu Mao, Qian Yang
Summary: Accumulation of oxidative stress is closely associated with aging and aging-related diseases. Understanding the molecular mechanisms that regulate oxidative stress is crucial for uncovering the pathogenesis of these diseases. Chaperone-mediated autophagy (CMA), a selective lysosome-dependent degradation process, has been shown to maintain cellular homeostasis and attenuate oxidative stress. This study reveals that CMA directly degrades Keap1, leading to increased Nrf2 levels, nuclear translocation, and expression of antioxidative genes. Furthermore, a feed-forward loop between CMA and Nrf2 is identified. These findings highlight the role of CMA as a regulator of the Keap1-Nrf2 pathway and emphasize its antioxidative function.
Review
Plant Sciences
Masanori Hiraoka
Summary: The green seaweed Ulva spp. play a crucial role as primary producers in marine coastal ecosystems. Some populations decline in response to ocean warming, while others cause massive blooms known as green tide, depending on the fate of cells between somatic cell division and sporic cell division. Research suggests that inhibiting biomass allocation to spore production is a key property for Ulva to cause a huge green tide.
Article
Environmental Sciences
Jianan Jiang, Yahe Li, Chaoyang Hu, Wenrong Zhu, Nianjun Xu
Summary: The study focuses on the spore formation mechanism of Ulva prolifera through culturing the algae under optimal conditions. It analyzes the changes in photosynthetic capacity, chlorophyll content, and gene expression during different states of spore formation. The study provides new insights into the molecular regulation of spore formation, despite the need for further research.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Plant Sciences
Samrah A. Awan, Imran Khan, Muhammad Rizwan, Xinquan Zhang, Marian Brestic, Aaqil Khan, Mohamed A. El-Sheikh, Mohammed N. Alyemeni, Shafaqat Ali, Linkai Huang
Summary: The research found that exogenous ABA and JA can improve the growth profile of pearl millet under drought stress by enhancing chlorophyll and relative water content, and strengthening the plant defense system. Additionally, JA performed better than ABA under drought stress.
PHYSIOLOGIA PLANTARUM
(2021)
Article
Environmental Sciences
Li Huan, Mengmeng Shi, Xulei Wang, Wenhui Gu, Baoyu Zhang, Xuehua Liu, Jintao Zhuo, Guangce Wang
Summary: Green tides in the Yellow Sea have periodically occurred since 2007, impacting the ecological environment and green algal communities along the coasts of Jiangsu and Shandong provinces in China. Through surveys and comparative analyses, it was discovered that the floating form of Ulva prolifera had a multibranched morphology, while the attached form showed significant morphological variation among individuals. Genetic analysis revealed that both floating and attached Ulva prolifera could hybridize with Ulva linza. The attached form displayed a higher level of genetic diversity with abundant sites of variation and haplotypes.
MARINE POLLUTION BULLETIN
(2023)
Article
Biotechnology & Applied Microbiology
Yuan He, Mengru Li, Yehua Wang, Songdong Shen
Summary: The transcription factor UpMYB44 is identified as a positive regulator of carotenoid biosynthesis in Ulva prolifera, enhancing carotenoid accumulation by interacting with key carotenoid synthesis genes and responding to environmental stresses.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2022)
Article
Environmental Sciences
Skhawat Ali, Rafaqat A. Gill, Zaid Ulhassan, Na Zhang, Saddam Hussain, Kangni Zhang, Qian Huang, Muhammad Sagir, Muhammad Bilal Tahir, Muhammad B. Gill, Theodore M. Mwamba, Basharat Ali, Weijun Zhou
Summary: This study aimed to investigate the protective mechanisms of exogenously applied melatonin (MT) on Brassica napus plants under cobalt (Co) stress. The results showed that MT could minimize oxidative damage, lipid peroxidation, and maintain membrane integrity. Additionally, MT enhanced the activity of antioxidant enzymes, regulated gene expression, and reduced Co accumulation in the roots. These findings indicated that exogenous MT improved plant morphology, photosynthetic apparatus, osmotic adjustments, and antioxidant defense systems by enhancing Co-detoxification.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Plant Sciences
Tanja Zuna Pfeiffer, Zorana Katanic, Ljiljana Krstin, Ivana Koraca, Martina Varga, Denis Klapan, Ivna Stolfa Camagajevac
Summary: Cold temperature stress can lead to oxidative stress and hinder the production of Stevia rebaudiana; understanding the response of stevia plants to low temperature can contribute to the development of effective production strategies in non-native regions.
SOUTH AFRICAN JOURNAL OF BOTANY
(2023)
Article
Biotechnology & Applied Microbiology
Sung-Yeoul Kim, Vikash Chandra Roy, Jin-Seok Park, Byung-Soo Chun
Summary: This study aims to extract functional substances from Undaria pinnatiida sporophyll using supercritical carbon dioxide (SC-CO2) and subcritical water extraction (SWE). The results showed that the consecutive green extraction method can yield extracts rich in fucoxanthin and beta-carotene, and the sporophyll of Undaria pinnatiida contains health-beneficial fatty acids. Additionally, SWE can extract substances with antioxidant, antibacterial, and antihypertensive activities.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2024)
