Interactive effects of melatonin and cytokinin on alleviating drought-induced leaf senescence in creeping bentgrass (Agrostis stolonifera)

Ma, Xiqing; Zhang, Jing; Burgess, Patrick; Rossi, Stephanie; Huang, Bingru

doi:10.1016/j.envexpbot.2017.10.010

Cited by 152 publications

(91 citation statements)

References 59 publications

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“…In addition, it was also observed that melatonin annual peaks occurred during the fruit development and the coloring period. These were consistent with the results reported by Lei et al and Zhao et al The highest melatonin content was identified during the period of leaf senescence indicating its possible role in leaf senescence, which already been reported in different species …”

Section: Discussionsupporting

confidence: 93%

“…These were consistent with the results reported by Lei et al and Zhao et al 37,41 The highest melatonin content was identified during the period of leaf senescence indicating its possible role in leaf senescence, which already been reported in different species. [42][43][44][45] In animals, melatonin is a molecule to transfer the environmental light alterations. It is a signal to instruct the seasonal reproduction in photoperiodic sensitive breeders, such as goats, deer, and hamsters.…”

Section: Discussionmentioning

confidence: 99%

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

Zhang

Wang

Kai-quan

et al. 2019

Journal of Pineal Research

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Melatonin regulates the seasonal reproduction in photoperiodic sensitive animals. Its function in plants reproduction has not been extensively studied. In the current study, the effects of melatonin on the apple tree flowering have been systematically investigated. For consecutive 2‐year monitoring, it was found that the flowering was always associated with the drop of melatonin level in apple tree. Melatonin application before flowering postponed apple tree flowering with a dose‐dependent manner. The increased melatonin levels at a suitable range also resulted in more flowering. The data indicated that similar to the animals, the melatonin also serves as the signal of the environmental light to regulate the plant reproduction. It was mainly the blue and far‐red light to regulate the gene expression of melatonin synthetic enzymes and melatonin production in plants. The seasonal alterations of the blue and far‐red lights coordinated well with the changes of the melatonin levels and led to decreased melatonin level before flowering. The mechanism studies showed that melatonin per se inhibits all the four flowering pathways in apple. The results not only provide the basic knowledge for melatonin research, but also uncover melatonin as a chemical message of light signal to mediate plant reproduction. This information can be potentially used to control flowering period and prolong the harvest time, helpfully to open a new avenue for increasing crop yield by melatonin application.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

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

Zhang

Wang

Kai-quan

et al. 2019

Journal of Pineal Research

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“…Drought-induced leaf senescence in creeping bentgrass was alleviated significantly by exogenous melatonin. [103]. Nitric oxide is an essential signaling molecule in both plants and animals.…”

Section: Drought Stressmentioning

confidence: 99%

Mechanisms of Environmental Stress Tolerance in Turfgrass

et al. 2020

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Turfgrasses constitute a vital part of the landscape ecological systems for sports fields, golf courses, home lawns and parks. However, turfgrass species are affected by numerous abiotic stresses include salinity, heat, cold, drought, waterlogging and heavy metals and biotic stresses such as diseases and pests. Harsh environmental conditions may result in growth inhibition, damage in cell structure and metabolic dysfunction. Hence, to survive the capricious environment, turfgrass species have evolved various adaptive strategies. For example, they can expel phytotoxic matters; increase activities of stress response related enzymes and regulate expression of the genes. Simultaneously, some phytohormones and signal molecules can be exploited to improve the stress tolerance in turfgrass. Generally, the mechanisms of the adaptive strategies are integrated but not necessarily the same. Recently, metabolomic, proteomic and transcriptomic analyses have revealed plenty of stress response related metabolites, proteins and genes in turfgrass. Therefore, the regulation mechanism of turfgrass’s response to abiotic and biotic stresses was further understood. However, the specific or broad-spectrum related genes that may improve stress tolerance remain to be further identified. Understanding stress response in turfgrass species will contribute to improve stress tolerance of turfgrass.

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“…Recently, MEL was found to up-regulate ABA catabolic genes and down-regulate ABA biosynthetic genes, resulting in a rapid reduction in ABA, which was involved in MEL-regulated leaf senescence [36]. Under drought and heat stress, MEL suppressed leaf senescence through block ABA signal pathway and promote the cytokinin pathway [19,40]. Although in this study, there was not drought nor heat treatment, the plant will unavoidably suffer these stresses during the growing season in natural conditions.…”

Section: Discussionmentioning

confidence: 79%

“…Therefore, a small increase in wheat yield will result in a big effect on food security in the word. Based on our current study and previous research about the mechanism of the MEL on plant development [29,[34][35][36][37]40,45], a potential mechanistic diagram of MEL on improving wheat grain yield is proposed for future research reference. (1) During the germination and seedling growth stages, the MEL could crosstalk with IAA and GA, increasing the tiller number and seedling growth, which leads to an increase in spike number.…”

Section: Discussionmentioning

confidence: 99%

Seed Pre-Soaking with Melatonin Improves Wheat Yield by Delaying Leaf Senescence and Promoting Root Development

Yang

et al. 2020

Agronomy

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The effects of exogenous application of melatonin (MEL) on promoting plant growth and alleviating environmental stresses are already known, but the potential value in crop production is still poorly understood. In this study, the effects of seed pre-soaking with MEL on winter wheat (Triticum aestivum L.) growth and yield were investigated in a continuous two-year pot experiment and another year of field experimentation. Results showed that seed pre-soaking with different concentrations of MEL (10, 100 and 500 μM) for 24 h increased grain yields per plant from 29% to 80% in pot experiment and increased grain yield per area from 4–19% in field experiment, compared with the controls. Further analysis showed that the beneficial effects of MEL on improving wheat grain yield can be ascribed to: (1) increased spike number by enhancing tiller number; (2) enhanced carbon assimilation capacity by maintaining large leaf area, high photosynthetic rate and delaying leaf senescence; (3) promoted growth in root system. The result of this study suggests that MEL could be considered as an effective plant growth regulator for improving grain production in winter wheat.

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Interactive effects of melatonin and cytokinin on alleviating drought-induced leaf senescence in creeping bentgrass (Agrostis stolonifera)

Cited by 152 publications

References 59 publications

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

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

Mechanisms of Environmental Stress Tolerance in Turfgrass

Seed Pre-Soaking with Melatonin Improves Wheat Yield by Delaying Leaf Senescence and Promoting Root Development

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