Melatonin Induced Cold Tolerance in Plants: Physiological and Molecular Responses

Qari, Sameer H.; Hassan, Muhammad Umair; Chattha, Muhammad Umer; Mahmood, Athar; Naqve, Maria; Nawaz, Muhammad; Barbanti, Lorenzo; Alahdal, Maryam A.; Aljabri, Maha

doi:10.3389/fpls.2022.843071

Cited by 35 publications

(20 citation statements)

References 156 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nonetheless, over-expression of MT responsive genes under various abiotic stresses is studied in few crops. Many studies reported that MT levels significantly increased under stress conditions ( Xing et al, 2021 ; Qari et al, 2022 ).…”

Section: Mechanism Of Melatonin Induced Stress Tolerancementioning

confidence: 99%

Melatonin-Induced Protection Against Plant Abiotic Stress: Mechanisms and Prospects

et al. 2022

View full text Add to dashboard Cite

Global warming in this century increases incidences of various abiotic stresses restricting plant growth and productivity and posing a severe threat to global food production and security. The plant produces different osmolytes and hormones to combat the harmful effects of these abiotic stresses. Melatonin (MT) is a plant hormone that possesses excellent properties to improve plant performance under different abiotic stresses. It is associated with improved physiological and molecular processes linked with seed germination, growth and development, photosynthesis, carbon fixation, and plant defence against other abiotic stresses. In parallel, MT also increased the accumulation of multiple osmolytes, sugars and endogenous hormones (auxin, gibberellic acid, and cytokinins) to mediate resistance to stress. Stress condition in plants often produces reactive oxygen species. MT has excellent antioxidant properties and substantially scavenges reactive oxygen species by increasing the activity of enzymatic and non-enzymatic antioxidants under stress conditions. Moreover, the upregulation of stress-responsive and antioxidant enzyme genes makes it an excellent stress-inducing molecule. However, MT produced in plants is not sufficient to induce stress tolerance. Therefore, the development of transgenic plants with improved MT biosynthesis could be a promising approach to enhancing stress tolerance. This review, therefore, focuses on the possible role of MT in the induction of various abiotic stresses in plants. We further discussed MT biosynthesis and the critical role of MT as a potential antioxidant for improving abiotic stress tolerance. In addition, we also addressed MT biosynthesis and shed light on future research directions. Therefore, this review would help readers learn more about MT in a changing environment and provide new suggestions on how this knowledge could be used to develop stress tolerance.

show abstract

Section: Mechanism Of Melatonin Induced Stress Tolerancementioning

confidence: 99%

Melatonin-Induced Protection Against Plant Abiotic Stress: Mechanisms and Prospects

et al. 2022

View full text Add to dashboard Cite

show abstract

“… 10 Studies in plants have shown that MEL regulates plant growth, root morphogenesis, floral transformation, and responses to multiple abiotic stresses, 11–17 including cold stress. 14 , 18 For instance, MEL can alleviate the drought stress of wheat, rapeseed and maize by reducing the malondialdehyde (MDA) contents. 19–21 In Limonium bicolor, wheat, and cotton, MEL improved salt tolerance by enhancing the antioxidant enzyme activities and the content of soluble sugar.…”

Section: Introductionmentioning

confidence: 99%

“…25 In conclusion, MEL has been widely used to improve the tolerance against drought, salt, and cold stress. However, in response to cold stress, most studies have been carried out to identify the MEL-induced stress tolerance mechanisms at physiological and biochemical levels in different crop plants; 14 , 18 still, little is known about MEL-induced cold tolerance in rapeseed. Thus, there was a dire need to evaluate the positive impact of MEL in rapeseed seedlings at molecular level.…”

Section: Introductionmentioning

confidence: 99%

Exogenous melatonin confers cold tolerance in rapeseed (Brassica napus L.) seedlings by improving antioxidants and genes expression

Yan

Raza

et al. 2022

Plant Signaling & Behavior

View full text Add to dashboard Cite

Rapeseed ( Brassica napus L.) is an important oilseed crop globally. However, its growth and production are significantly influenced by cold stress. To reveal the protective role of exogenous melatonin (MEL) in cold tolerance, rapeseed seedlings were pretreated with different concentrations of MEL before cold stress. The results indicated that the survival rate was increased significantly by the MEL pretreatment under cold stress. Seedlings pretreated with 0.01 g L −1 MEL were all survived and were used to analyze the physiological characteristics and the expression level of various genes related to cold tolerance. Under cold stress, exogenous MEL significantly increased the contents of proline, soluble sugar, and soluble protein; while the malondialdehyde content was decreased by exogenous MEL under cold stress. On the other hand, the activities of antioxidant defense enzymes such as catalase, peroxidase, and superoxide dismutase were also significantly enhanced. The results also showed that MEL treatment significantly upregulated the expression of Cu-SOD, COR6.6 ( cold-regulated), COR15 , and CBFs ( C-repeat binding factor ) genes under cold stress. It was suggested exogenous MEL improved the content of osmotic regulatory substances to maintain the balance of cellular osmotic potential under cold stress and improved the scavenging capacity of reactive oxygen species by strengthening the activity of antioxidant enzymes and the cold-related genes expression.

show abstract

“…Drought stress also reduces photosynthesis by reducing cell turgor and plants’ access to CO 2 owing to the closure of stomata ( Jaleel et al, 2007 ). One of the major detriments of DS is the production of reactive oxygen species (ROS) that damage the structural integrity of membranes, proteins, and DNA ( Ahanger and Agarwal, 2017 ; Sultan et al, 2021 ; Qari et al, 2022 ; Rehman et al, 2022 ). However, plants have developed different mechanisms to reduce the harmful effects of ROS to protect the stability of cellular structures and improve the yield under DS ( Ahanger and Ahmad, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

The Critical Role of Arbuscular Mycorrhizal Fungi to Improve Drought Tolerance and Nitrogen Use Efficiency in Crops

Tang

Hassan

et al. 2022

Front. Plant Sci.

View full text Add to dashboard Cite

Drought stress (DS) is a serious abiotic stress and a major concern across the globe as its intensity is continuously climbing. Therefore, it is direly needed to develop new management strategies to mitigate the adverse effects of DS to ensure better crop productivity and food security. The use of arbuscular mycorrhizal fungi (AMF) has emerged as an important approach in recent years to improve crop productivity under DS conditions. AMF establishes a relationship with 80% of land plants and it induces pronounced impacts on plant growth and provides protection to plants from abiotic stress. Drought stress significantly reduces plant growth and development by inducing oxidative stress, disturbing membrane integrity, plant water relations, nutrient uptake, photosynthetic activity, photosynthetic apparatus, and anti-oxidant activities. However, AMF can significantly improve the plant tolerance against DS. AMF maintains membrane integrity, improves plant water contents, nutrient and water uptake, and water use efficiency (WUE) therefore, improve the plant growth under DS. Moreover, AMF also protects the photosynthetic apparatus from drought-induced oxidative stress and improves photosynthetic efficiency, osmolytes, phenols and hormone accumulation, and reduces the accumulation of reactive oxygen species (ROS) by increasing anti-oxidant activities and gene expression which provide the tolerance to plants against DS. Therefore, it is imperative to understand the role of AMF in plants grown under DS. This review presented the different functions of AMF in different responses of plants under DS. We have provided a detailed picture of the different mechanisms mediated by AMF to induce drought tolerance in plants. Moreover, we also identified the potential research gaps that must be fulfilled for a promising future for AMF. Lastly, nitrogen (N) is an important nutrient needed for plant growth and development, however, the efficiency of applied N fertilizers is quite low. Therefore, we also present the information on how AMF improves N uptake and nitrogen use efficiency (NUE) in plants.

show abstract

Melatonin Induced Cold Tolerance in Plants: Physiological and Molecular Responses

Cited by 35 publications

References 156 publications

Melatonin-Induced Protection Against Plant Abiotic Stress: Mechanisms and Prospects

Melatonin-Induced Protection Against Plant Abiotic Stress: Mechanisms and Prospects

Exogenous melatonin confers cold tolerance in rapeseed (Brassica napus L.) seedlings by improving antioxidants and genes expression

The Critical Role of Arbuscular Mycorrhizal Fungi to Improve Drought Tolerance and Nitrogen Use Efficiency in Crops

Contact Info

Product

Resources

About