Exogenous melatonin improves cotton (Gossypium hirsutum L.) pollen fertility under drought by regulating carbohydrate metabolism in male tissues

Hu, Wei; Cao, Yuting; Loka, Dimitra A.; Harris‐Shultz, Karen; Reíter, Russel J.; Ali, Saif; Liu, Yu; Zhou, Zhiguo

doi:10.1016/j.plaphy.2020.04.001

Cited by 69 publications

(48 citation statements)

References 53 publications

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“…Since its discovery 60 years ago melatonin has been well studied in animals (Lerner, Case, & Takahashi, 1960), and after its isolation from plants in 1995 (Dubbels et al, 1995) it was additionally shown that melatonin acts generally in plants as a free radical scavenger and signalling molecule inducing transcription of antioxidant enzymes thereby enhancing plant growth (Arnao & Hernandez‐Ruiz, 2019; Frank et al, 2009; Wei et al, 2015). Recent findings indicate a protective function of melatonin against heat stress induced ROS in pollen (Hu et al, 2020; Qi et al, 2018). Moreover, melatonin has been suggested to function within a hormetic framework against stress (Agathokleous, Kitao, & Calabrese, 2019).…”

Section: Discussionmentioning

confidence: 99%

Implications of ionizing radiation on pollen performance in comparison with diverse models of polar cell growth

Stephan

2020

Plant Cell & Environment

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Research concerning the effects of ionizing radiation (IR) on plant systems is essential for numerous aspects of human society, as for instance, in terms of agriculture and plant breeding, but additionally for elucidating consequences of radioactive contamination of the ecosphere. This comprehensive survey analyses effects of x‐ and γ‐irradiation on male gametophytes comprising primarily in vitro but also in vivo data of diverse plant species. The IR‐dose range for pollen performance was compiled and 50% inhibition doses (ID50) for germination and tube growth were comparatively related to physiological characteristics of the microgametophyte. Factors influencing IR‐susceptibility of mature pollen and polarized tube growth were evaluated, such as dose‐rate, environmental conditions, or species‐related variations. In addition, all available reports suggesting bio‐positive IR‐effects particularly on pollen performance were examined. Most importantly, for the first time influences of IR specifically on diverse phylogenetic models of polar cell growth were comparatively analysed, and thus demonstrated that the gametophytic system of pollen is extremely resistant to IR, more than plant sporophytes and especially much more than comparable animal cells. Beyond that, this study develops hypotheses regarding a molecular basis for the extreme IR‐resistance of the plant microgametophyte and highlights its unique rank among organismal systems.

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Section: Discussionmentioning

confidence: 99%

Implications of ionizing radiation on pollen performance in comparison with diverse models of polar cell growth

Stephan

2020

Plant Cell & Environment

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“…results, previous studies revealed that the exogenous application of melatonin can improve morphological responses under drought stress in different plants such as tobacco [12], Camellia sinensis [13], cucumber [14], soybean [15], alfalfa [16], rice [17], maize [18], cotton [19], grape [20], and kiwi [21]. It seems that melatonin as a novel plant growth regulator, independently of auxin signaling, plays a pivotal role in shoot and root growth and development [10,11].…”

Section: Plos Onementioning

confidence: 95%

“…Therefore, it is necessary to apply exogenous melatonin for coping adverse environmental conditions because, sometimes, the endogenous level of melatonin is insufficient for this aim. Several studies have shown that the application of exogenous melatonin could significantly improve stress tolerance in different plants such as tobacco [12], Camellia sinensis [13], cucumber [14], soybean [15], alfalfa [16], rice [17], maize [18], cotton [19], grape [20], and kiwi [21]. Therefore, applying melatonin can be considered as a short-term and promising approach for alleviating drought stress in various economically important plants such as citrus.…”

Section: Introductionmentioning

confidence: 99%

The application of artificial neural networks in modeling and predicting the effects of melatonin on morphological responses of citrus to drought stress

Jafari

Shahsavar

2020

PLoS ONE

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Drought stress as one of the most devastating abiotic stresses affects agricultural and horticultural productivity in many parts of the world. The application of melatonin can be considered as a promising approach for alleviating the negative impact of drought stress. Modeling of morphological responses to drought stress can be helpful to predict the optimal condition for improving plant productivity. The objective of the current study is modeling and predicting morphological responses (leaf length, number of leaves/plants, crown diameter, plant height, and internode length) of citrus to drought stress, based on four input variables including melatonin concentrations, days after applying treatments, citrus species, and level of drought stress, using different Artificial Neural Networks (ANNs) including Generalized Regression Neural Network (GRNN), Radial basis function (RBF), and Multilayer Perceptron (MLP). The results indicated a higher accuracy of GRNN as compared to RBF and MLP. The great accordance between the experimental and predicted data of morphological responses for both training and testing processes support the excellent efficiency of developed GRNN models. Also, GRNN was connected to Non-dominated Sorting Genetic Algorithm-II (NSGA-II) to optimize input variables for obtaining the best morphological responses. Generally, the validation experiment showed that ANN-NSGA-II can be considered as a promising and reliable computational tool for studying and predicting plant morphological and physiological responses to drought stress.

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“…Melatonin is synthesized transiently during the flower development and its function resembles closely with the levels of its precursors such as tryptophan and serotonin (Park et al, 2013). The regeneration potential of anthers resonates with the increase of melatonin peaks (Hu et al, 2020). This implies the melatonin accumulation in specific reproductive tissues and stages is essential for gametophytic development (Arnao & Hernández‐Ruiz, 2020a).…”

Section: Melatonin‐mediated Regulation Of Plant Development Under Drought Stressmentioning

confidence: 99%

“…Recently, several reports showed that melatonin treatment has enhanced the enzymatic antioxidants CAT, APX, MDHAR, and DHAR activities in maize (Alharby & Fahad, 2020); CAT, POD, SOD, and APX activities in buckwheat (Hossain et al, 2020); GT, CAT, POD, SOD, and GR activities in Salvia sp. (Bidabadi et al, 2020); indole acetic acid and phenolic contents; TSS, CAT, POD, and SOD activities in flax plants (Sadak et al, 2020); proline content and antioxidant CAT, POD, SOD, and GR activities in rapeseed (Khan et al, 2020); root catalase activity in rapeseed (Dai et al, 2020); and acid and alkaline invertase activities in anthers of cotton (Hu et al, 2020). Melatonin‐mediated activation of proline stimulates drought adaptations through a stabilized cell membrane and reduced ROS accumulation (Wang et al, 2019).…”

Section: Melatonin‐mediated Biochemical Defense Against Drought Stressmentioning

confidence: 99%

Mechanistic insights on melatonin‐mediated drought stress mitigation in plants

Tiwari

Lal

Kumar

et al. 2021

Physiologia Plantarum

177

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Drought stress imposes a serious threat to crop productivity and nutritional security.Drought adaptation mechanisms involve complex regulatory network comprising of various sensory and signaling molecules. In this context, melatonin has emerged as a potential signaling molecule playing a crucial role in imparting stress tolerance in plants. Melatonin pretreatment regulates various plant physiological processes such as osmoregulation, germination, photosynthesis, senescence, primary/secondary metabolism, and hormonal cross-talk under water deficit conditions. Melatoninmediated regulation of ascorbate-glutathione (AsA-GSH) cycle plays a crucial role to scavenge reactive oxygen species generated in the cells during drought. Here, in this review, the current knowledge on the role of melatonin to ameliorate adverse effects of drought by modulating morphological, physiological, and redox regulatory processes is discussed. The role of melatonin to improve water absorption capacity of roots by regulating aquaporin channels and hormonal cross-talk involved in drought stress mitigation are also discussed. Overall, melatonin is a versatile bio-molecule involved in growth promotion and yield enhancement under drought stress that makes it a suitable candidate for eco-friendly crop production to ensure food security.

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Exogenous melatonin improves cotton (Gossypium hirsutum L.) pollen fertility under drought by regulating carbohydrate metabolism in male tissues

Cited by 69 publications

References 53 publications

Implications of ionizing radiation on pollen performance in comparison with diverse models of polar cell growth

Implications of ionizing radiation on pollen performance in comparison with diverse models of polar cell growth

The application of artificial neural networks in modeling and predicting the effects of melatonin on morphological responses of citrus to drought stress

Mechanistic insights on melatonin‐mediated drought stress mitigation in plants

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