Melatonin plays multifunctional role in horticultural crops against environmental stresses: A review

Bose, Santosh Kumar; Howlader, Prianka

doi:10.1016/j.envexpbot.2020.104063

Cited by 97 publications

(52 citation statements)

References 152 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, the recent identification of the first phytomelatonin receptor (CAND2/PMTR1) in Arabidopsis has opened the door to consider melatonin a new phytohormone 12 , 13 . Increasing numbers of studies have indicated that melatonin enhances the cold tolerance of various plant species, including melon, tomato, watermelon, and Arabidopsis 14 . Moreover, some evidence has shown melatonin to be a novel long-distance signal that can be transported from roots to shoots 15 – 17 .…”

Section: Introductionmentioning

confidence: 99%

Methyl jasmonate mediates melatonin-induced cold tolerance of grafted watermelon plants

et al. 2021

View full text Add to dashboard Cite

Root–shoot communication has a critical role in plant adaptation to environmental stress. Grafting is widely applied to enhance the abiotic stress tolerance of many horticultural crop species; however, the signal transduction mechanism involved in this tolerance remains unknown. Here, we show that pumpkin- or figleaf gourd rootstock-enhanced cold tolerance of watermelon shoots is accompanied by increases in the accumulation of melatonin, methyl jasmonate (MeJA), and hydrogen peroxide (H2O2). Increased melatonin levels in leaves were associated with both increased melatonin in rootstocks and MeJA-induced melatonin biosynthesis in leaves of plants under cold stress. Exogenous melatonin increased the accumulation of MeJA and H2O2 and enhanced cold tolerance, while inhibition of melatonin accumulation attenuated rootstock-induced MeJA and H2O2 accumulation and cold tolerance. MeJA application induced H2O2 accumulation and cold tolerance, but inhibition of JA biosynthesis abolished rootstock- or melatonin-induced H2O2 accumulation and cold tolerance. Additionally, inhibition of H2O2 production attenuated MeJA-induced tolerance to cold stress. Taken together, our results suggest that melatonin is involved in grafting-induced cold tolerance by inducing the accumulation of MeJA and H2O2. MeJA subsequently increases melatonin accumulation, forming a self-amplifying feedback loop that leads to increased H2O2 accumulation and cold tolerance. This study reveals a novel regulatory mechanism of rootstock-induced cold tolerance.

show abstract

Section: Introductionmentioning

confidence: 99%

Methyl jasmonate mediates melatonin-induced cold tolerance of grafted watermelon plants

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Among them, melatonin is a unique antioxidant and plant master regulator that protects plants from oxidative stress and regulates various plant responses to environmental disorders, especially water stress [ 16 , 17 , 18 ]. Although accumulating reviews about the beneficial effects of melatonin have been published over the last decade, it still needs more discussion in order to update and discover melatonin functions, especially under biotic and abiotic stresses [ 19 , 20 , 21 ]. Herein, we will discuss the most recent and relevant studies of the protective roles of melatonin-induced water stress tolerance, including anatomical changes, and physiological and molecular mechanisms, as well as its central role in the hormonal system.…”

Section: Introductionmentioning

confidence: 99%

Melatonin-Induced Water Stress Tolerance in Plants: Recent Advances

et al. 2020

View full text Add to dashboard Cite

Water stress (drought and waterlogging) is severe abiotic stress to plant growth and development. Melatonin, a bioactive plant hormone, has been widely tested in drought situations in diverse plant species, while few studies on the role of melatonin in waterlogging stress conditions have been published. In the current review, we analyze the biostimulatory functions of melatonin on plants under both drought and waterlogging stresses. Melatonin controls the levels of reactive oxygen and nitrogen species and positively changes the molecular defense to improve plant tolerance against water stress. Moreover, the crosstalk of melatonin and other phytohormones is a key element of plant survival under drought stress, while this relationship needs further investigation under waterlogging stress. In this review, we draw the complete story of water stress on both sides—drought and waterlogging—through discussing the previous critical studies under both conditions. Moreover, we suggest several research directions, especially for waterlogging, which remains a big and vague piece of the melatonin and water stress puzzle.

show abstract

“…bZIP transcription factor HY5 plays a key role in UV-B signalling (Brown et al, 2005;Brown & Jenkins, 2008;Huang et al, 2012;Stracke et al, 2010;Ulm et al, 2004). As with COP1, HY5 involvement places UV-B into a larger network of plant light-responsive signalling, in which HY5 plays a well-characterized, central role in modulation of light-responsive gene expression.…”

Section: Discussionmentioning

confidence: 99%

“…It is also present in diatoms, fungi, algae, ferns and higher plants (Vriend & Reiter, 2015b), indicating its selection as a regulatory substance during early stages of evolution (Arnao, 2014; Majidinia, Reiter, Shakouri, & Yousefi, 2018; Reiter et al, 2017; Zhao et al, 2019). Numerous studies have documented the role of melatonin in ameliorating various common abiotic and biotic stresses, including cold, drought, heavy metals, salt and pathogen attack (Arnao & Hernández‐Ruiz, 2019a, 2019c; Bose & Howlader, 2020; Moustafa‐Farag et al, 2019; Sharif et al, 2018; Wang, Reiter, & Chan, 2018). Relatively few studies have addressed the role of melatonin in UV‐B responses.…”

Section: Introductionmentioning

confidence: 99%

Role of melatonin in UV‐B signaling pathway and UV‐B stress resistance in Arabidopsis thaliana

Yao

et al. 2020

Plant Cell & Environment

View full text Add to dashboard Cite

Melatonin (N-acetyl-5-methoxytryptamine) plays important roles in plant defences against a variety of biotic and abiotic stresses, including UV-B stress. Molecular mechanisms underlying functions of melatonin in plant UV-B responses are poorly understood. Here, we show that melatonin effect on molecular signalling pathways, physiological changes and UV-B stress resistance in Arabidopsis. Both exogenous and endogenous melatonin affected expression of UV-B signal transduction pathway genes. Experiments using UV-B signalling component mutants cop1-4 and hy5-215 revealed that melatonin not only acts as an antioxidant to promote UV-B stress resistance, but also regulates expression of several key components of UV-B signalling pathway, including ubiquitin-degrading enzyme (COP1), transcription factors (HY5, HYH) and RUP1/2. Our findings indicate that melatonin delays and subsequently enhances expression of COP1, HY5, HYH and RUP1/2, which act as central effectors in UV-B signalling pathway, thus regulating their effects on antioxidant systems to protect the plant from UV-B stress.

show abstract

Melatonin plays multifunctional role in horticultural crops against environmental stresses: A review

Cited by 97 publications

References 152 publications

Methyl jasmonate mediates melatonin-induced cold tolerance of grafted watermelon plants

Methyl jasmonate mediates melatonin-induced cold tolerance of grafted watermelon plants

Melatonin-Induced Water Stress Tolerance in Plants: Recent Advances

Role of melatonin in UV‐B signaling pathway and UV‐B stress resistance in Arabidopsis thaliana

Contact Info

Product

Resources

About