Apple tree flowering is mediated by low level of melatonin under the regulation of seasonal light signal

Zhang, Haixia; Wang, Lin; Kai-quan, Shi; Shan, Dongqian; Zhu, Yunpeng; Wang, Chanyu; Bai, Yixue; Yan, Tian‐Ci; Zheng, Xiaodong; Kong, Jin

doi:10.1111/jpi.12551

Cited by 63 publications

(44 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A recent study in apple flower buds also showed that the expression of melatonin biosynthetic genes, MdASMT9 and MdSNAT5, was significantly enhanced upon melatonin treatment. 50 Based on these results, it can be speculated that exogenous melatonin application reduces endogenous ABA accumulation and maintains in vivo melatonin concentrations by simultaneously downregulating the expression of ABA biosynthetic genes and upregulating the expression of melatonin biosynthetic genes. In contrast, in Elymus nutans and cucumber, melatonin treatment was found to elevate ABA production under cold stress.…”

Section: Discussionmentioning

confidence: 97%

“…Accordingly, the drop in transcription levels of melatonin biosynthetic genes including BrTDC2 , BrTDC3 , BrTDC4 , BrT5H , BrASMT, and BrSNAT was also inhibited by melatonin application (Figure B). A recent study in apple flower buds also showed that the expression of melatonin biosynthetic genes, MdASMT9 and MdSNAT5 , was significantly enhanced upon melatonin treatment . Based on these results, it can be speculated that exogenous melatonin application reduces endogenous ABA accumulation and maintains in vivo melatonin concentrations by simultaneously downregulating the expression of ABA biosynthetic genes and upregulating the expression of melatonin biosynthetic genes.…”

Section: Discussionmentioning

confidence: 98%

See 1 more Smart Citation

Melatonin delays leaf senescence of Chinese flowering cabbage by suppressing ABFs‐mediated abscisic acid biosynthesis and chlorophyll degradation

Tan

Fan

Kuang

et al. 2019

Journal of Pineal Research

135

View full text Add to dashboard Cite

Melatonin and abscisic acid (ABA) play contrasting roles in regulating leaf senescence in plants. The molecular mechanism underlying the interaction between melatonin and ABA involved in leaf senescence, however, remains poorly defined. Herein, we found that exogenous application of melatonin delayed the senescence of Chinese flowering cabbage, accompanied by reduced expression of chlorophyll catabolic and ABA biosynthetic genes, and a lower endogenous ABA level. Significantly, three nucleus‐localized transcriptional activators BrABF1, BrABF4, and BrABI5 were identified, and their expressions were repressed by melatonin. In vitro and in vivo binding experiments revealed that BrABF1, BrABF4, and BrABI5 activated the transcription of a series of ABA biosynthetic and chlorophyll catabolic genes by physically binding to their promoters. Moreover, transient over‐expression of BrABF1, BrABF4, and BrABI5 in tobacco leaves induced ABA accumulation and promoted chlorophyll degradation by upregulating tobacco ABA biosynthetic and chlorophyll catabolic genes, resulting in the accelerated leaf senescence. These effects were significantly attenuated by melatonin treatment. Our findings suggest that melatonin‐mediated inhibition of leaf senescence involves suppression of ABFs‐mediated ABA biosynthesis and chlorophyll degradation. Unraveling of the molecular regulatory mechanism of leaf senescence controlled by ABA and melatonin expands our understanding of the regulation of this phenomenon and offers potentially more effective molecular breeding strategies for extending the shelf‐life of Chinese flowering cabbage.

show abstract

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 98%

Melatonin delays leaf senescence of Chinese flowering cabbage by suppressing ABFs‐mediated abscisic acid biosynthesis and chlorophyll degradation

Tan

Fan

Kuang

et al. 2019

Journal of Pineal Research

135

View full text Add to dashboard Cite

show abstract

“…The enhancement of salt tolerance through melatonin application mainly depends on directly scavenging ROS and enhancing the activities of antioxidative enzymes and photosynthetic efficiency, as well as regulating the transcription of genes related to salt stress [34]. Melatonin plays a function with dose-dependent effects, and an optimum concentration of melatonin plays a role in resisting environmental stresses; optimum concentrations are different among different plant species [52]. Before exogenous application of melatonin, a suitable melatonin concentration must be chosen through pre-experiment evaluation.…”

Section: Discussionmentioning

confidence: 99%

Melatonin Application Improves Salt Tolerance of Alfalfa (Medicago sativa L.) by Enhancing Antioxidant Capacity

Cen

Wang

Liu

et al. 2020

Plants

View full text Add to dashboard Cite

Alfalfa (Medicago sativa L.) is an important and widely cultivated forage grass. The productivity and forage quality of alfalfa are severely affected by salt stress. Melatonin is a bioactive molecule with versatile physiological functions and plays important roles in response to various biotic and abiotic stresses. Melatonin has been proven efficient in improving alfalfa drought and waterlogging tolerance in recent studies. In our reports, we applied melatonin exogenously to explore the effects of melatonin on alfalfa growth and salt resistance. The results demonstrated that melatonin application promoted alfalfa seed germination and seedling growth, and reduced oxidative damage under salt stress. Further application research found that melatonin alleviated salt injury in alfalfa plants under salt stress. The electrolyte leakage, malondialdehyde (MDA) content and H 2 O 2 content were significantly reduced, and the activities of catalase (CAT), peroxidase (POD), and Cu/Zn superoxide dismutase (Cu/Zn-SOD) were increased with melatonin pretreatment compared to control plants under salt stress with the upregulation of genes related to melatonin and antioxidant enzymes biosynthesis. Melatonin was also involved in reducing Na + accumulation in alfalfa plants. Our study indicates that melatonin plays a primary role as an antioxidant in scavenging H 2 O 2 and enhancing activities of antioxidant enzymes to improve the salt tolerance of alfalfa plants.Plants 2020, 9, 220 2 of 17 world's irrigated land affected by saline or sodic globally [7,8]. Salinity has become one of the most important environmental stress factors impairing worldwide agricultural productivity. Under salinity conditions, the seed germination, growth and development processes of alfalfa are inhibited and they finally impair the herbage yield, as well as the forage quality [9]. Breeding new alfalfa cultivars with high salt tolerance is always needed. Genetic engineering and conventional breeding have been proven efficient for improving salt tolerance of various plant species [10][11][12][13]. However, they are time-consuming and complicated. Exogenous application of certain plant growth regulators such as phytohormone and other small molecules has been proven efficient at overcoming the harmful effects of salt stress on plants [14][15][16][17]. Moreover, plant growth regulators in low concentrations always play a role in plants, and are cost-effective. Foliar spraying of salicylic acid (SA) on faba bean inhibits Na + accumulation and lipid peroxidation, improving the antioxidant resistance and finally mitigating the damage caused by salinity [18]. Exogenously applied poly-γ-glutamic acid on wheat maintains the Na + and K + homeostasis and enhances antioxidant capacity by alleviating salinity damage under salt stress conditions [19]. Exogenous spermidine application to salt-stressed cucumber improves the photosynthetic capacity and the activity of key enzymes for CO 2 fixation by regulating the expression of related genes, and tolerance to salinity is thus...

show abstract

“…As a result, leaf photosynthesis and the growth of maize plants were inhibited. Zhang et al [35] also obtained similar results on the effects of melatonin concentrations on flowering in apple tree. Overexpression of SNAcT gene in rice is similar to the continuous supplementation of melatonin, while in the soybean and grape trials, the short-term supplementation of melatonin resulted in the difference in melatonin supply.…”

Section: Roles Of Melatonin In Regulating Growth and Development Of Hmentioning

confidence: 57%

Review of Melatonin in Horticultural Crops

Yan¹,

Shi²,

Gong³

2020

Melatonin - The Hormone of Darkness and Its Therapeutic Potential and Perspectives

View full text Add to dashboard Cite

Melatonin is an indoleamine, abundant in animals and plants, which has the functions of regulating circadian rhythm, improving immunity and anti-aging in animals, and is a good health care product beneficial to human health. Recent studies have shown that melatonin has physiological functions including regulating plant growth, promoting seed germination, controlling root development and delaying leaf senescence. The antioxidant properties of melatonin give it the ability to strengthen plants' resistance to stress. The comprehensive researches in recent years, involving five aspects of "the biosynthetic pathway of melatonin in plants, the melatonin in horticultural crops and its influencing factors, the roles of melatonin in the growth and development of horticultural crops, in the response to stress of horticultural crops, the signal transduction network of melatonin in regulating plant growth and the development and stress resistance," are reviewed in the present paper. The application of melatonin in horticulture production is also discussed, which can provide a theoretical reference for the application of melatonin in horticultural production. DOI: http://dx.doi.org/10.5772/intechopen.90935 excess ROS to reduce the oxidation of cells. However, a recent study in rice (Oryza sativa L.) has shown that the key melatonin synthesis gene COMT is located in plant chloroplasts and has demonstrated that melatonin synthesis is increased through the 5-MT pathway [8]. CAND2/PMTR1, a hypothetic plant melatonin receptor, recently has been identified in Arabidopsis thaliana [9]. It is located in the plasma membrane with a receptor-like topology and interacts with the G-protein subunit (GPA1), while expression in different tissues is induced by melatonin. The binding of plant melatonin receptors triggers Gγb and Gα activation of NADPH oxidasedependent H 2 O 2 production (RBOH), increasing Ca 2+ inflow, promoting K + outflow, and ultimately leading to stomatal closure [10]. The cloning of these melatoninmetabolizing genes and the discovery of the receptors can lay a certain foundation for the study of melatonin-related functions in the future. Review of Melatonin in Horticultural Crops Concentrations of melatonin in horticultural crops and its influential factors

show abstract

Apple tree flowering is mediated by low level of melatonin under the regulation of seasonal light signal

Cited by 63 publications

References 60 publications

Melatonin delays leaf senescence of Chinese flowering cabbage by suppressing ABFs‐mediated abscisic acid biosynthesis and chlorophyll degradation

Melatonin delays leaf senescence of Chinese flowering cabbage by suppressing ABFs‐mediated abscisic acid biosynthesis and chlorophyll degradation

Melatonin Application Improves Salt Tolerance of Alfalfa (Medicago sativa L.) by Enhancing Antioxidant Capacity

Review of Melatonin in Horticultural Crops

Contact Info

Product

Resources

About