Transcriptomic analysis of short-term heat stress response in Pinellia ternata provided novel insights into the improved thermotolerance by spermidine and melatonin

Ma, Guangjing; Zhang, Meide; Xu, Jiawen; Zhou, Wei; Cao, Liwen

doi:10.1016/j.ecoenv.2020.110877

Cited by 32 publications

(18 citation statements)

References 71 publications

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“…These results also confirm the previous finding of Zhang et al [30] that MT application decreases the ABA content and NCED and bZEP expression and increases the cytokinin biosynthesis in perennial ryegrass under heat stress. Similar results were also demonstrated in Malus species under drought stress [51] and Pinellia ternate under heat stress [52]. Similarly, the present results showed that in the plants exposed to 42 • C, the SA content increased during the first 3 days, then gradually decreased as the stress condition was prolonged.…”

Section: Discussionsupporting

confidence: 90%

Melatonin Ameliorates Thermotolerance in Soybean Seedling through Balancing Redox Homeostasis and Modulating Antioxidant Defense, Phytohormones and Polyamines Biosynthesis

et al. 2021

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Global warming is impacting the growth and development of economically important but sensitive crops, such as soybean (Glycine max L.). Using pleiotropic signaling molecules, melatonin can relieve the negative effects of high temperature by enhancing plant growth and development as well as modulating the defense system against abiotic stresses. However, less is known about how melatonin regulates the phytohormones and polyamines during heat stress. Our results showed that high temperature significantly increased ROS and decreased photosynthesis efficiency in soybean plants. Conversely, pretreatment with melatonin increased plant growth and photosynthetic pigments (chl a and chl b) and reduced oxidative stress via scavenging hydrogen peroxide and superoxide and reducing the MDA and electrolyte leakage contents. The inherent stress defense responses were further strengthened by the enhanced activities of antioxidants and upregulation of the expression of ascorbate–glutathione cycle genes. Melatonin mitigates heat stress by increasing several biochemicals (phenolics, flavonoids, and proline), as well as the endogenous melatonin and polyamines (spermine, spermidine, and putrescine). Furthermore, the positive effects of melatonin treatment also correlated with a reduced abscisic acid content, down-regulation of the gmNCED3, and up-regulation of catabolic genes (CYP707A1 and CYP707A2) during heat stress. Contrarily, an increase in salicylic acid and up-regulated expression of the defense-related gene PAL2 were revealed. In addition, melatonin induced the expression of heat shock protein 90 (gmHsp90) and heat shock transcription factor (gmHsfA2), suggesting promotion of ROS detoxification via the hydrogen peroxide-mediated signaling pathway. In conclusion, exogenous melatonin improves the thermotolerance of soybean plants and enhances plant growth and development by activating antioxidant defense mechanisms, interacting with plant hormones, and reprogramming the biochemical metabolism.

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Section: Discussionsupporting

confidence: 90%

Melatonin Ameliorates Thermotolerance in Soybean Seedling through Balancing Redox Homeostasis and Modulating Antioxidant Defense, Phytohormones and Polyamines Biosynthesis

et al. 2021

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“…It also increased the activities of antioxidant enzymes, such as SOD, CAT, and POD 72 Pinellia ternata 35°C day/30°C 100 μM MET treatment increased Chl content and relative water content and decreased MDA and electrolyte leakage. Also, activated HSPs , ribosomal proteins, and ROS-scavenging enzymes 73 Tall fescue ( Festuca arundinacea ) 42°C 20 µM MET reduced the heat-caused damaging effects on Chl a, Chl b, carotenoid, and protein synthesis machinery. It also enhanced the activities of antioxidant enzymes, protein, and lipid molecules and favored the lower production of H 2 O 2 and MDA 74 Strawberry ( Fragaria × ananassa Duch.)…”

Section: Potential Of Exogenous Melatonin In Managing Temperature Str...mentioning

confidence: 99%

Melatonin-mediated temperature stress tolerance in plants

et al. 2022

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Global climate changes cause extreme temperatures and a significant reduction in crop production, leading to food insecurity worldwide. Temperature extremes (including both heat and cold stresses) is one of the most limiting factors in plant growth and development and severely affect plant physiology, biochemical, and molecular processes. Biostimulants like melatonin (MET) have a multifunctional role that acts as a “defense molecule” to safeguard plants against the noxious effects of temperature stress. MET treatment improves plant growth and temperature tolerance by improving several defense mechanisms. Current research also suggests that MET interacts with other molecules, like phytohormones and gaseous molecules, which greatly supports plant adaptation to temperature stress. Genetic engineering via overexpression or CRISPR/Cas system of MET biosynthetic genes uplifts the MET levels in transgenic plants and enhances temperature stress tolerance. This review highlights the critical role of MET in plant production and tolerance against temperature stress. We have documented how MET interacts with other molecules to alleviate temperature stress. MET-mediated molecular breeding would be great potential in helping the adverse effects of temperature stress by creating transgenic plants.

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“…In the case of tomato fruits harvested at low temperatures, previous melatonin treatment improved thermotolerance, increasing PAs, proline and NO levels (Aghdam et al 2019). Other examples include apple plants in alkaline stress (Gong et al 2017), cucumber seedlings in chilling stress (Zhao et al 2017), wheat seedlings in salt stress (Ke et al 2018), alfalfa plants in waterlogging stress (Zhang et al 2019a), pistachio seedlings in salt stress (Kamiab 2020) and Pinella ternata plants in heat stress (Ma et al 2020). In all these cases, there was an increased in PAs after melatonin treatment that improved stress tolerance (Table 1).…”

Section: Melatonin and Plant Hormone Relationshipsmentioning

confidence: 99%

Melatonin as a regulatory hub of plant hormone levels and action in stress situations

2020

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Melatonin, a molecule first discovered in animal tissues, plays an important role in multiple physiological responses as a possible plant master regulator. It mediates responses to different types of stress, both biotic and abiotic. Melatonin reduces the negative effects associated with stressors, improving the plant response by increasing plant stress tolerance. When plants respond to stress situations, they use up a large amount of plant resources through a set of perfectly synchronized actions. Responses mediated by melatonin use the plant's hormones to, after adequate modulation, counteract and overcome the negative action of the stressor. In this paper, we review melatonin-plant hormone relationships. Factors that trigger the stress response and the central role of melatonin are analysed. An extensive analysis of current studies shows that melatonin modulates the metabolism of plant hormones (biosynthesis and catabolism), the rise or fall in their endogenous levels, the regulation of signalling elements and how melatonin affects the final response of auxin, gibberellins, cytokinins, abscisic acid, ethylene, salicylic acid, jasmonates, brassinosteroids, polyamines and strigolactones. Lastly, a general overview of melatonin's actions and its regulatory role at a global level is provided and proposals for future research are made.

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Transcriptomic analysis of short-term heat stress response in Pinellia ternata provided novel insights into the improved thermotolerance by spermidine and melatonin

Cited by 32 publications

References 71 publications

Melatonin Ameliorates Thermotolerance in Soybean Seedling through Balancing Redox Homeostasis and Modulating Antioxidant Defense, Phytohormones and Polyamines Biosynthesis

Melatonin Ameliorates Thermotolerance in Soybean Seedling through Balancing Redox Homeostasis and Modulating Antioxidant Defense, Phytohormones and Polyamines Biosynthesis

Melatonin-mediated temperature stress tolerance in plants

Melatonin as a regulatory hub of plant hormone levels and action in stress situations

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