The role of melatonin in regulating horticultural crop production under various abiotic stresses

Huang, Liping; Fu, Wenxuan; Zhang, Yujing; Liu, Xing; Wang, Qianqian; Wang, Lei; Tanveer, Mohsin

doi:10.1016/j.scienta.2023.112508

Cited by 12 publications

(13 citation statements)

References 230 publications

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“…Under SS, higher Na + accumulation in seeds results in higher ROS production and MEL application improves SG by decreasing Na + accumulation and increasing K + accumulation 94,95 . Such MEL mediated higher regulation of K + /Na + ratio during SG was associated with upregulation of H + ‐ATPase activity 83 and hormonal crosstalk 76 . Moreover, MEL application improved higher K + accumulation in germinating seeds could be associated with higher ROS scavenging 96 and reducing electrolyte leakage 97 to desensitize ion channels mediating K + ‐efflux, thus increases K + selectivity over Na + under SS 28 .…”

Section: Mel Sg and Abiotic Stressorsmentioning

confidence: 97%

“…94,95 Such MEL mediated higher regulation of K + /Na + ratio during SG was associated with upregulation of H + -ATPase activity 83 and hormonal crosstalk. 76 Moreover, MEL application improved higher K + accumulation in germinating seeds could be associated with higher ROS scavenging 96 and reducing electrolyte leakage 97 to desensitize ion channels mediating K +efflux, thus increases K + selectivity over Na + under SS. 28 Having said that, Limonium bicolor showed reduced SG due to higher Na + sequestration in embryo and seed coat, while MEL treatment did not alter Na + sequestration in seeds but still improved SG.…”

Section: Salinity Stress (Ss)mentioning

confidence: 98%

“…Exogenous application of MEL improves plant growth under abiotic stress conditions, [76][77][78] however the physiological basis of the regulation of SG by MEL has yet to be deciphered. Thus, in this section we analyzed and discussed the reported roles of MEL in regulating SG under abiotic stresses.…”

Section: Mel Sg and Abiotic Stressorsmentioning

confidence: 99%

“…The regulatory role of exogenously applied MEL in mediating SG under abiotic stresses is subjected to the MEL dose dependency, stress exposure time and seed quality. 76,77,281,282 Several enzymes are involved in MEL biosynthesis and metabolism (see Figure 1) and the functional characterization of genes encoding those enzymes relating to MEL biosynthesis and metabolism showed a diverse role of MEL in regulating plant growth and SG. 282 For instance, the ectopic expression of SNAT gene in rice increased seed width and length by regulating the gene expression of GRAIN INCOMPLETE FILLING-1 (GIF1) and GRAIN WIDTH-2 (GW2) and MEL accumulation in seeds.…”

Section: Functional Role Of Mel Related Genes In Regulating Sgmentioning

confidence: 99%

“…The regulatory role of exogenously applied MEL in mediating SG under abiotic stresses is subjected to the MEL dose dependency, stress exposure time and seed quality 76,77,281,282 . Several enzymes are involved in MEL biosynthesis and metabolism (see Figure 1) and the functional characterization of genes encoding those enzymes relating to MEL biosynthesis and metabolism showed a diverse role of MEL in regulating plant growth and SG 282 .…”

Section: Functional Role Of Mel Related Genes In Regulating Sgmentioning

confidence: 99%

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Melatonin as a key regulator in seed germination under abiotic stress

Wang,

Tanveer,

Wang

et al. 2024

Journal of Pineal Research

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Seed germination (SG) is the first stage in a plant's life and has an immense importance in sustaining crop production. Abiotic stresses reduce SG by increasing the deterioration of seed quality, and reducing germination potential, and seed vigor. Thus, to achieve a sustainable level of crop yield, it is important to improve SG under abiotic stress conditions. Melatonin (MEL) is an important biomolecule that interplays in developmental processes and regulates many adaptive responses in plants, especially under abiotic stresses. Thus, this review specifically summarizes and discusses the mechanistic basis of MEL‐mediated SG under abiotic stresses. MEL regulates SG by regulating some stress‐specific responses and some common responses. For instance, MEL induced stress specific responses include the regulation of ionic homeostasis, and hydrolysis of storage proteins under salinity stress, regulation of C‐repeat binding factors signaling under cold stress, starch metabolism under high temperature and heavy metal stress, and activation of aquaporins and accumulation of osmolytes under drought stress. On other hand, MEL mediated regulation of gibberellins biosynthesis and abscisic acid catabolism, redox homeostasis, and Ca2+ signaling are amongst the common responses. Nonetheless factors such as endogenous MEL contents, plant species, and growth conditions also influence above‐mentioned responses. In conclusion, MEL regulates SG under abiotic stress conditions by interacting with different physiological mechanisms.

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Section: Mel Sg and Abiotic Stressorsmentioning

confidence: 97%

Section: Salinity Stress (Ss)mentioning

confidence: 98%

Section: Mel Sg and Abiotic Stressorsmentioning

confidence: 99%

Section: Functional Role Of Mel Related Genes In Regulating Sgmentioning

confidence: 99%

Section: Functional Role Of Mel Related Genes In Regulating Sgmentioning

confidence: 99%

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Melatonin as a key regulator in seed germination under abiotic stress

Wang,

Tanveer,

Wang

et al. 2024

Journal of Pineal Research

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Deciphering Regulatory Role of Melatonin in Foliar Nastic Movements of Portulaca oleracea: Visual Insights from Histology and Anatomy

Bargunam,

Roy,

Amisha

et al. 2024

J Plant Growth Regul

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Plant nastic movements exhibit unique behavioural patterns that synchronize with external cues. Given that the foliar nastic motions of Portulaca species are solely circadian, it is intriguing to investigate whether and how melatonin governs these movements. Analysis of histological traits concurrent with anatomical traits such as stomatal behaviour provides visual data on the plant species' gnosophysiology, offering clues and validation of the influence of multiple external stimuli on hydraulic forces that in turn alter turgor pressure. The current study aims to elucidate how exogenous melatonin modulates foliar nastic movements in Portulaca oleracea. Our findings indicate that melatonin functions as an intracellular hydraulic flux controller, influencing idioblast and crystal densities, as well as stomatal behaviour. Timepoint studies at specific Zeitgebers reveal that abiotic variables such as light and temperature can influence the endogenous melatonin concentration of P. oleracea. Therefore, this hormone potentially serves as an additional internal regulator of turgor pressure, influenced by both light and temperature. Thus, melatonin plays a crucial role in shaping the characteristic foliar nastic movements observed in P. oleracea, inherently tied to the circadian rhythm. Further investigation into idioblast and crystal torques, along with their angular momentum, is warranted to calculate the hydraulic forces at work in the leaf lamina. Thus the study underscores the multifaceted role of melatonin in navigating nastic movement processes through turgor pressure alterations brought about by intracellular depositions. The study in future could unravel melatonin's pleiotropic actions and the underlying mechanisms of foliar idiosyncratic nastic motions in other plant species as well. Moreover, both histology and anatomy play vital roles in the present study as it has provided visual evidence of the underlying mechanisms of foliar nastic movements in P. oleracea. Graphical Abstract

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