Exogenous melatonin enhances tomato heat resistance by regulating photosynthetic electron flux and maintaining ROS homeostasis

Sun, Cong; Meng, Sida; Wang, Baofeng; Shu, Zhao; Liu, Yulong; Qi, Mingfang; Wang, Zhenqi; Yin, Zepeng; Li, Tianlai

doi:10.1016/j.plaphy.2023.01.043

Cited by 19 publications

(9 citation statements)

References 75 publications

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“…The findings revealed that the melatonin treatment improved the net photosynthetic rate and chlorophyll fluorescence. Additionally, melatonin played a protective role in PSII by promoting a balanced electron transfer on the donor, reactive center, and acceptor sides, thus mitigating oxidative stress and damage to the photosynthetic machinery [ 95 ].…”

Section: Melatonin and Its Protective Effects On Photosynthetic Machi...mentioning

confidence: 99%

Impact of Exogenous Melatonin Application on Photosynthetic Machinery under Abiotic Stress Conditions

Karumannil

Khan

Kappachery

et al. 2023

Plants

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Inhospitable conditions that hinder plant growth and development encompass a range of abiotic stresses, such as drought, extreme temperatures (both low and high), salinity, exposure to heavy metals, and irradiation. The cumulative impact of these stresses leads to a considerable reduction in agricultural productivity worldwide. The generation of reactive oxygen species (ROS) is a shared mechanism of toxicity induced by all these abiotic stimuli in plants, resulting in oxidative damage and membrane instability. Extensive research has shed light on the dual role of melatonin in plants, where it serves as both a growth regulator, fostering growth and development, and a potent protector against abiotic stresses. The inherent potential of melatonin to function as a natural antioxidant positions it as a promising biostimulant for agricultural use, bolstering plants’ abilities to withstand a wide array of environmental challenges. Beyond its antioxidant properties, melatonin has demonstrated its capacity to regulate the expression of genes associated with the photosynthetic process. This additional characteristic enhances its appeal as a versatile chemical agent that can be exogenously applied to plants, particularly in adverse conditions, to improve their resilience and optimize photosynthetic efficiency in every phase of the plant life cycle. An examination of the molecular mechanisms underlying the stress-protective effects of exogenous melatonin on the photosynthetic machinery of plants under various abiotic stresses is presented in this paper. In addition, future prospects are discussed for developing stress-tolerant crops for sustainable agriculture in challenging environments.

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Section: Melatonin and Its Protective Effects On Photosynthetic Machi...mentioning

confidence: 99%

Impact of Exogenous Melatonin Application on Photosynthetic Machinery under Abiotic Stress Conditions

Karumannil

Khan

Kappachery

et al. 2023

Plants

View full text Add to dashboard Cite

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“…Different crop species exhibit distinct temperature thresholds at various developmental stages, significantly impacting their growth (Ding and Yang, 2022). The plant photosynthetic system is particularly sensitive to HS, and cellular damage can occur due to disrupted leaf cellular organization (Allakhverdiev et al, 2008; Sun et al, 2023a; Zahra et al, 2023). Heat stress can significantly decrease chlorophyll (Chl) biosynthesis due to Chl synthase degradation (Sharma et al, 2022; Zahra et al, 2023), induce protein denaturation and aggregation, and enhance lipid membrane fluidity (Zhang et al, 2019; Ding et al, 2020b; Raza et al, 2022a; Raza et al, 2023c).…”

Section: Impact Of Climate Change and Extreme Temperature On Crop Pro...mentioning

confidence: 99%

Temperature‐smart plants: A new horizon with omics‐driven plant breeding

Raza,

Bashir,

Khare

et al. 2024

Physiologia Plantarum

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The adverse effects of mounting environmental challenges, including extreme temperatures, threaten the global food supply due to their impact on plant growth and productivity. Temperature extremes disrupt plant genetics, leading to significant growth issues and eventually damaging phenotypes. Plants have developed complex signaling networks to respond and tolerate temperature stimuli, including genetic, physiological, biochemical, and molecular adaptations. In recent decades, omics tools and other molecular strategies have rapidly advanced, offering crucial insights and a wealth of information about how plants respond and adapt to stress. This review explores the potential of an integrated omics‐driven approach to understanding how plants adapt and tolerate extreme temperatures. By leveraging cutting‐edge omics methods, including genomics, transcriptomics, proteomics, metabolomics, miRNAomics, epigenomics, phenomics, and ionomics, alongside the power of machine learning and speed breeding data, we can revolutionize plant breeding practices. These advanced techniques offer a promising pathway to developing climate‐proof plant varieties that can withstand temperature fluctuations, addressing the increasing global demand for high‐quality food in the face of a changing climate.

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“…Reactive oxygen species (ROS) can be induced under HS, acting as a signal molecule to trigger the expression of a set of HS‐responsive TFs (i.e., Hsfs, MBF1c and MAPKs) (Miller et al 2009; Cong et al 2023). Some ROS transduction‐related genes (i.e., ZAT10 and ZAT12 ), as well as multiple HS‐responsive genes, especially antioxidant enzyme‐coding genes, change the redox state and reduce heat damage under short‐term HS conditions, while under long‐term HS conditions, ROS in plant cell accumulated and activated the PCD process (Doyle et al 2009; Cui et al 2012; Ohama et al 2016).…”

Section: Introductionmentioning

confidence: 99%

SlCathB2 as a negative regulator mediates a novel regulatory pathway upon high‐temperature stress response in tomato

Wen,

Zhou,

Jiang

et al. 2024

Physiologia Plantarum

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High‐temperature stress (HS) is a major abiotic stress that affects the yield and quality of plants. Cathepsin B‐like protease 2 (CathB2) has been reported to play a role in developmental processes and stress response, but its involvement in HS response has not been identified. Here, overexpression, virus‐induced gene silencing (VIGS)and RNA‐sequencing analysis were performed to uncover the functional characteristics of SlCathB2‐1 and SlCathB2‐2 genes for HS response in tomato. The results showed that overexpression of SlCathB2‐1 and SlCathB2‐2 resulted in reduced heat tolerance of tomato to HS while silencing the genes resulted in enhanced heat tolerance. RNA‐sequencing analysis revealed that the heat shock proteins (HSPs) exhibited higher expression in WT than in SlCathB2‐1 and SlCathB2‐2 overexpression lines. Furthermore, the possible molecular regulation mechanism underlying SlCathB2‐1 and SlCathB2‐2‐mediated response to HS was investigated. We found that SlCathB2‐1 and SlCathB2‐2 negatively regulated antioxidant capacity by regulating a set of genes involved in antioxidant defence and reactive oxygen species (ROS) signal transduction. We also demonstrated that SlCathB2‐1 and SlCathB2‐2 positively regulated ER‐stress‐induced PCD (ERSID) by regulating unfolded protein response (UPR) gene expression. Furthermore, SlCathB2‐1 and SlCathB2‐2 interacting with proteasome subunit beta type‐4 (PBA4) was identified in the ERSID pathway using yeast two‐hybrid (Y2H) analysis and bimolecular fluorescence complementation (BiFC) screening. Overall, the study identified both SlCathB2‐1 and SlCathB2‐2 as new negative regulators to HS and presented a new HS response pathway. This provided the foundation for the construction of heat‐tolerant molecular mechanisms and breeding strategies aiming to improve the thermotolerance of tomato plants.

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Exogenous melatonin enhances tomato heat resistance by regulating photosynthetic electron flux and maintaining ROS homeostasis

Cited by 19 publications

References 75 publications

Impact of Exogenous Melatonin Application on Photosynthetic Machinery under Abiotic Stress Conditions

Impact of Exogenous Melatonin Application on Photosynthetic Machinery under Abiotic Stress Conditions

Temperature‐smart plants: A new horizon with omics‐driven plant breeding

SlCathB2 as a negative regulator mediates a novel regulatory pathway upon high‐temperature stress response in tomato

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