Review
Plant Sciences
Sameera Karumannil, Tanveer Alam Khan, Sajeesh Kappachery, Mayank Anand Gururani
Summary: Inhospitable conditions, such as drought, extreme temperatures, salinity, heavy metals, and irradiation, lead to a reduction in agricultural productivity worldwide. Reactive oxygen species (ROS) generated by these stresses cause oxidative damage in plants. Melatonin serves as a growth regulator and protector against abiotic stresses due to its natural antioxidant properties. It also regulates genes associated with photosynthesis, making it an attractive chemical agent to improve plant resilience and optimize photosynthetic efficiency.
Article
Plant Sciences
Feiyu Yan, Jingyu Zhang, Weiwei Li, Yanfeng Ding, Qiuyi Zhong, Xia Xu, Haimin Wei, Ganghua Li
Summary: The study demonstrated that melatonin (MT) can enhance photosynthesis in rice under salt stress conditions by increasing relative water content, sucrose and starch content, and enhancing net photosynthetic rate. This enhancement is mainly attributed to the regulation of maintaining low ROS status, promoting the xanthophyll cycle, and increasing the activities of key photosynthetic enzymes by MT. These findings provide a mechanistic insight into how MT improves the photosynthetic capacity of rice under salt stress.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2021)
Article
Plant Sciences
Diandian Hu, Xiaojing Zhang, Pengcheng Xue, Yuanyuan Nie, Jinyu Liu, Yan Li, Can Wang, Xueli Wan
Summary: This study found that spraying carnation leaves with 100 μM MT can effectively alleviate damage caused by high temperature stress. Additionally, MT can promote the accumulation of photosynthetic pigments, enhance the performance of photosystem II, improve photosynthesis, reduce cell damage and lipid peroxidation, increase antioxidant enzyme activity, and regulate the accumulation of osmotic substances in carnation. Moreover, MT can increase the fresh/dry weight ratio of stems and roots, promote stomatal opening, and protect the integrity of chloroplast structure in carnation. The results of this study provide a theoretical foundation for mitigating the adverse effects of exogenous MT under heat stress and have important implications for the management of other plants affected by global warming.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Ebrahim Asadi, Atefeh Najafi, James D. Benson
Summary: This study determined the osmotic tolerance limits (OTLs) of ovarian stromal cells (OSCs) and investigated their relationship with reactive oxygen species (ROS) and mitochondrial respiratory chain activity (MRCA) of OSCs for the first time. The addition of an optimal dose of melatonin was found to expand the OTLs of OSCs and significantly reduce ROS, improve MRCA, total antioxidant capacity (TAC), and viability. The narrow osmotic window of OSCs emphasizes the importance of optimizing ovarian tissue cryopreservation transplantation (OTCT) protocols to maintain enough alive stromal cells, which are essential for follicle development and graft longevity.
Article
Horticulture
Yan Luo, Taotao Hu, Yunyun Huo, Lingling Wang, Li Zhang, Rui Yan
Summary: Exogenous melatonin application has been found to improve drought-stress tolerance in Chrysanthemum seedlings by increasing photosynthetic activity and reducing oxidative damage caused by drought.
Article
Plant Sciences
Dan Jiang, Bin Lu, Liantao Liu, Wenjing Duan, Yanjun Meng, Jin Li, Ke Zhang, Hongchun Sun, Yongjiang Zhang, Hezhong Dong, Zhiying Bai, Cundong Li
Summary: This study demonstrates that exogenous melatonin (MT) can enhance salt tolerance in cotton seedlings by regulating the photosynthetic system, osmotic modulators, chloroplast, and anatomical structure. Treatment with MT alleviates oxidative damage and ion imbalance caused by salt stress, leading to improved growth and biomass production in plants.
Article
Engineering, Environmental
Yue Wang, Dandan Guo, Jiechen Wang, Bei Tian, Yuanyuan Li, Guangyu Sun, Huihui Zhang
Summary: Nitrogen dioxide (NO2) is a common outdoor air pollutant with adverse effects on the environment and human health. Melatonin (Mel) has been found to alleviate the effects of NO2 stress on tobacco leaves by regulating enzyme activities and protein expression related to redox balance. This study suggests that Mel may be suitable for agricultural application in alleviating high-concentration NO2 stress.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Horticulture
Muhammad Saqib, Ahlam Khalofah, Atique ur Rehman, Muhammad Ahsan Altaf
Summary: This study reveals the ability of melatonin (ME) to mitigate the adverse effects of nickel (Ni) toxicity in pepper plants. ME supplementation restores seedling growth, protects the photosynthetic system, increases phenolic concentration, and reduces the accumulation of oxidative substances.
SCIENTIA HORTICULTURAE
(2024)
Article
Multidisciplinary Sciences
Guifang Li, Yanzhen Li, Yuzi Zhu, Wenjun Zheng, Mengxi Li, Jinlong Hu, Yongjun Fei, Sijia Zhu
Summary: The study found that drought stress had negative effects on the growth and physiology of P. sheareri seedlings, leading to changes in various substance contents. However, spraying melatonin can significantly alleviate the adverse effects of drought stress and promote the growth of P. sheareri seedlings.
Article
Plant Sciences
Yuqi Zhang, Elias Kaiser, Tao Li, Leo F. M. Marcelis
Summary: The stress of NaCl affects stomatal behavior and photosynthesis in tomato plants, with osmotic effects decreasing stomatal conductance and increasing stomatal responses to light intensity shifts, while ionic effects reduce photosynthetic capacity, CO2 carboxylation rate, and stomatal conductance. With increasing leaf age, the rates of light-triggered stomatal movement and photosynthetic induction decreased.
JOURNAL OF EXPERIMENTAL BOTANY
(2022)
Article
Plant Sciences
Pengfei Zhang, Lei Liu, Xin Wang, Ziyang Wang, He Zhang, Jingting Chen, Xinyu Liu, Yubo Wang, Caifeng Li
Summary: Melatonin can improve growth, yield, sugar content, chlorophyll synthesis, photosynthesis, osmotic adjustment, ion homeostasis, and antioxidant defense system of sugar beets under salt stress. The combined foliar and root application of melatonin shows more pronounced positive effects on mitigating salt stress in sugar beets.
Article
Plant Sciences
Wei Ren, Li Chen, Zong ming Xie, Xiaofeng Peng
Summary: The study demonstrates that melatonin can improve cotton yield and growth under salt stress. Transcriptomic and metabolomic analysis reveals that melatonin treatment enhances photosynthetic efficiency, affects flavonoid and linoleic acid metabolism, promotes the expression of ion homeostasis-related genes, and activates plant hormone signal transduction and reactive oxygen scavenging genes. Additionally, melatonin treatment leads to the accumulation of various compounds, including the antioxidative compound N, N'-Diferuloylputrescine.
Article
Environmental Sciences
Rana Roy, Shirin Sultana, Naheeda Begum, Dario Fornara, Milon Barmon, Ruiqi Zhang, Tanwne Sarker, Md Ghulam Rabbany
Summary: The study demonstrated that exogenous melatonin can enhance photosynthetic performance and antioxidant enzyme activities, leading to improved growth performance of Althaea rosea in coal-mined spoils.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Forestry
Yan Zhong, Changzhou Liu, Bo Wei, Jianting Zhang, Yuyan An, Liangju Wang
Summary: The application of ALA improves drought tolerance in walnuts by enhancing chlorophyll content, photosynthetic activity, gas exchange, and antioxidant enzyme activities, as well as accumulating compatible osmotic solutes to maintain osmotic equilibrium.
Article
Chemistry, Multidisciplinary
Liang Cao, Fang Kou, Mingcong Zhang, Xijun Jin, Chunyuan Ren, Gaobo Yu, Yuxian Zhang, Mengxue Wang
Summary: The study shows that natto produced from soybeans grown under drought stress with exogenous melatonin has significantly higher yield, nutrient content, and quality compared to those without treatment. Melatonin can increase carbohydrate content in soybeans, elevate nattokinase levels, and enhance product quality.
JOURNAL OF CHEMISTRY
(2021)