Article
Engineering, Environmental
Qufan Xing, Md. Kamrul Hasan, Zhichao Li, Ting Yang, Weiduo Jin, Zhenyu Qi, Ping Yang, Guanghui Wang, Golam Jalal Ahammed, Jie Zhou
Summary: Cadmium (Cd) pollution poses a serious threat to crop production. This study investigated the hormonal regulation of phytochelatin (PC) synthesis and the role of melatonin in enhancing plant resistance to Cd stress in tomato. Results showed that Cd stress decreased chlorophyll content and CO2 assimilation rate, but increased Cd, H2O2, and MDA accumulation in the shoot, particularly in PCs deficient plants. Exogenous melatonin treatment increased endogenous melatonin and PC contents, alleviated oxidative stress, and improved osmotic balance and nutrient absorption. These findings provide insights into the mechanism of melatonin-regulated PC synthesis and its potential to enhance plant resistance to toxic metal stress.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
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
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
Environmental Sciences
Debabrata Dolui, Mirza Hasanuzzaman, Indraneel Saha, Arijit Ghosh, Malay Kumar Adak
Summary: The study monitored sodium and arsenic toxicity in Salvinia natans L. through hyperaccumulation of metals induced by 2,4-dichlorophenoxyacetic acid (2,4-D), showing that 2,4-D treatment can modulate plant growth components to ensure plant survival under toxic conditions and alleviate oxidative stress induced by metal exposure.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Xiaolong Yang, Yumeng Zhang, Ting Liu, Jiali Shi, Mingfang Qi, Yufeng Liu, Tianlai Li
Summary: The study demonstrates that melatonin treatment can enhance the photosynthetic efficiency and reduce photoinhibition of tomato plants under low night temperatures. This is achieved by regulating electron transport and upregulating genes and proteins related to environmental adaptation and chloroplast integrity maintenance. These findings provide insights into the molecular mechanism of melatonin-mediated abiotic stress resistance.
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.
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
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
Plant Sciences
Tiantian Ye, Yanping Wang, Yu-Qi Feng, Zhulong Chan
Summary: The study showed that mild alkali stress slightly inhibited the growth of bermudagrass, but compared to moderate and severe alkali stress, it led to faster growth and higher survival rates. Alkali stress affected the metabolic pathways of bermudagrass, resulting in different response strategies to different levels of stress.
PHYSIOLOGIA PLANTARUM
(2021)
Article
Plant Sciences
Hongsheng Gao, Lunzeng Huang, Zijian Gong, Xueting Wang, Xuqiang Qiao, Fang Xiao, Yuting Yang, Bohui Yu, Xiaotong Guo, Chunyan Yu, Hongxia Zhang
Summary: Exogenous application of melatonin improves tobacco plant tolerance to high manganese stress by scavenging reactive oxygen species and regulating ion homeostasis.
PLANT GROWTH REGULATION
(2022)
Review
Plant Sciences
Jing Zhao, Junjie Hu
Summary: Global warming in this century has led to an increase in various abiotic stresses, which restrict plant growth and endanger global food production and security. Plants produce different phytohormones to mitigate the adverse effects of these stresses, including melatonin (MEL). Recent research has revealed the role of MEL in plants' responses to abiotic stresses, showing that it enhances physiological functions and improves stress tolerance.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Jan Homolak, Ana Babic Perhoc, Ana Knezovic, Jelena Osmanovic Barilar, Davor Virag, Mihovil Joja, Melita Salkovic-Petrisic
Summary: This study investigated the acute time-response of intestinal redox homeostasis following oral administration of d-galactose. The results showed that acute oral administration of d-galactose increased the activity of antioxidative enzymes and decreased lipid peroxidation in the intestine, suggesting the activation of defense mechanisms against oxidative damage. The small intestine demonstrated a tolerance to high concentrations of galactose, and oral galactose treatment was associated with a reduction in intestinal oxidative stress.
Article
Plant Sciences
Sharma Shreya, Laha Supriya, Gudipalli Padmaja
Summary: Melatonin is capable of enhancing drought tolerance in plants by improving antioxidant system and photosynthetic parameters, as well as regulating the synthesis of jasmonic acid and abscisic acid. Exogenous melatonin treatment increases endogenous melatonin content and reduces chlorophyll degrading enzyme activity, leading to higher chlorophyll content and improved drought tolerance in sensitive variety. However, exogenous melatonin treatment has no significant effect on endogenous melatonin content in tolerant variety, indicating that the tolerant variety is already equipped with better drought resistance.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Laha Supriya, Pullaiahgari Durgeshwar, Mehanathan Muthamilarasan, Gudipalli Padmaja
Summary: Melatonin enhances drought tolerance in cotton plants by modulating the antioxidant system, increasing photosynthetic activity, water-use efficiency, and nitrogen metabolism. The study also found that the effect of melatonin differs between drought-sensitive and drought-tolerant varieties, with more pronounced effects observed in the sensitive variety. Additionally, the study suggests that autophagy may play a role in alleviating drought stress.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Muhammad Ahsan Altaf, Huangying Shu, Yuanyuan Hao, Muhammad Ali Mumtaz, Xu Lu, Zhiwei Wang
Summary: Melatonin treatment improves photosynthetic performance in plants under cold stress by enhancing gas exchange characteristics and photosynthetic pigment content. It also upregulates the expression of biosynthetic genes and increases the activity of photosynthetic enzymes. Melatonin treatment mitigates the negative effects of cold stress on photosystem activity and maintains photosynthetic efficiency.
