Role of proline in regulating turfgrass tolerance to abiotic stress

Jiang, Jingle; Guo, Zhixin; Sun, Xiaoyang; Jiang, Yiwei; Xie, Fang; Chen, Yajun

doi:10.48130/gr-2023-0002

Cited by 4 publications

(1 citation statement)

References 85 publications

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“…It has been found that proline accumulation in plants can enhance their freezing and frost resistance and their winter survival, as shown by studies on proline-accumulating barley ( Hordeum vulgare L.) lines ( Tantau et al, 2004 ). The enzymes P5CS and P5CR are crucial in the proline synthesis pathway in plants ( Jiang et al, 2023 ). In Medicago sativa , the application of melatonin has been shown to increase proline accumulation and production, which helps to repair molecular damage caused by drought ( Antoniou et al, 2017 ).…”

Section: Discussionmentioning

confidence: 99%

Role of melatonin in enhancing arbuscular mycorrhizal symbiosis and mitigating cold stress in perennial ryegrass (Lolium perenne L.)

Wei

Wang

et al. 2023

Front. Microbiol.

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Melatonin is a biomolecule that affects plant development and is involved in protecting plants from environmental stress. However, the mechanisms of melatonin’s impact on arbuscular mycorrhizal (AM) symbiosis and cold tolerance in plants are still unclear. In this research, AM fungi inoculation and exogenous melatonin (MT) were applied to perennial ryegrass (Lolium perenne L.) seedlings alone or in combination to investigate their effect on cold tolerance. The study was conducted in two parts. The initial trial examined two variables, AM inoculation, and cold stress, to investigate the involvement of the AM fungus Rhizophagus irregularis in endogenous melatonin accumulation and the transcriptional levels of its synthesis genes in the root system of perennial ryegrass under cold stress. The subsequent trial was designed as a three-factor analysis, encompassing AM inoculation, cold stress, and melatonin application, to explore the effects of exogenous melatonin application on plant growth, AM symbiosis, antioxidant activity, and protective molecules in perennial ryegrass subjected to cold stress. The results of the study showed that compared to non-mycorrhizal (NM) plants, cold stress promoted an increase in the accumulation of melatonin in the AM-colonized counterparts. Acetylserotonin methyltransferase (ASMT) catalyzed the final enzymatic reaction in melatonin production. Melatonin accumulation was associated with the level of expression of the genes, LpASMT1 and LpASMT3. Treatment with melatonin can improve the colonization of AM fungi in plants. Simultaneous utilization of AM inoculation and melatonin treatment enhanced the growth, antioxidant activity, and phenylalanine ammonia-lyase (PAL) activity, while simultaneously reducing polyphenol oxidase (PPO) activity and altering osmotic regulation in the roots. These effects are expected to aid in the mitigation of cold stress in Lolium perenne. Overall, melatonin treatment would help Lolium perenne to improve growth by promoting AM symbiosis, improving the accumulation of protective molecules, and triggering in antioxidant activity under cold stress.

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Section: Discussionmentioning

confidence: 99%

Role of melatonin in enhancing arbuscular mycorrhizal symbiosis and mitigating cold stress in perennial ryegrass (Lolium perenne L.)

Wei

Wang

et al. 2023

Front. Microbiol.

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Physiological and metabolic changes in Selaginella tamariscina in response to desiccation and resurrection

Xi,

Cai,

2023

Preprint

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As a typical resurrection plant, Selaginella tamariscina exhibits remarkable drought tolerance and resurrection capacity. However, the mechanism of resurrection associated with the alteration of global organic metabolites in S. tamariscina has not been fully elucidated. Objectives of the study were to investigate drought tolerance and recovery capacity of S. tamariscina based on physiological response and to further reveal potential mechanism of resurrection related to changes in antioxidant defense and differential metabolites under drought stress and after rehydration. Results showed that severe drought reduced leaf relative water content from 90–18%, resulting in extreme declines in chlorophyll content and photochemical efficiency as well as a significant increase in malondialdehyde content in leaves, but S. tamariscina plants could rapidly recover within 3 days of rehydration. Superoxide dismutase, peroxidase, and catalase were significantly activated by dehydration and rehydration. In addition, drought-induced accumulations of citric acid and ribitol could be maintained at higher levels in response to rehydration. Although most of organic metabolites were not affected significantly by dehydration (lactic acid, ribonic acid, arabinitol, and erythritol) or decreased sharply under drought stress (glycine, alanine, γ-aminobutyric acid, proline, glyceric acid, vanillic acid, arabinose, and rhamnose), but S. tamariscia has the ability to quickly recover or increase the contents of these organic metabolite after rehydration. Current findings indicated that enhanced antioxidant defense system could be one of the main pathways for acquisition of desiccation tolerance and resurrection capacity, thereby alleviating oxidative damage to S. tamariscina plants. The accumulation of various organic metabolites played critical roles in underlying mechanism of resurrection due to their positive function associated with osmotic adjustment, osmoprotection, antioxidant, and energy metabolism.

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How do cool-season turfgrasses respond to high temperature: progress and challenges

Sun,

Wang,

Chan

2024

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Role of proline in regulating turfgrass tolerance to abiotic stress

Cited by 4 publications

References 85 publications

Role of melatonin in enhancing arbuscular mycorrhizal symbiosis and mitigating cold stress in perennial ryegrass (Lolium perenne L.)

Role of melatonin in enhancing arbuscular mycorrhizal symbiosis and mitigating cold stress in perennial ryegrass (Lolium perenne L.)

Physiological and metabolic changes in Selaginella tamariscina in response to desiccation and resurrection

How do cool-season turfgrasses respond to high temperature: progress and challenges

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