Exogenous Glycine Betaine Ameliorates the Adverse Effect of Salt Stress on Perennial Ryegrass

Hu, Longxing; Hu, Tao; Zhang, Xunzhong; Pang, Huancheng; Fu, Jinmin

doi:10.21273/jashs.137.1.38

Cited by 118 publications

(94 citation statements)

References 54 publications

(65 reference statements)

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“…Our previous study had confirmed that the changes of macronutrient cations content, such as Ca 2+ , Mg 2+ , Na + , and K + , are necessary for salinity adaptation of perennial ryegrass12. In this study, NaCl treatment decreased K + but increased Na + concentration in leaves, stems and roots, which is consistent with our previous studies1231. In roots, external Ca 2+ application significantly increased K + concentration but decreased Na + concentration.…”

Section: Discussionsupporting

confidence: 92%

H2O2 and Ca2+-based signaling and associated ion accumulation, antioxidant systems and secondary metabolism orchestrate the response to NaCl stress in perennial ryegrass

Chen²,

Hu³

et al. 2016

Sci Rep

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Little is known about the interplay between Ca2+ and H2O2 signaling in stressed cool-season turfgrass. To understand better how Ca2+ and H2O2 signals are integrated to enhance grass acclimation to stress conditions, we analyzed the rearrangements of endogenous ion accumulation, antioxidant systems and secondary metabolism in roots, stems and leaves of perennial ryegrass (Lolium perenne L.) treated with exogenous Ca2+ and H2O2 under salinity. Ca2+ signaling remarkably enhanced the physiological response to salt conditions. Ca2+ signaling could maintain ROS homeostasis in stressed grass by increasing the responses of antioxidant genes, proteins and enzymes. H2O2 signaling could activate ROS homeostasis by inducing antioxidant genes but weakened Ca2+ signaling in leaves. Furthermore, the metabolic profiles revealed that sugars and sugar alcohol accounted for 49.5–88.2% of all metabolites accumulation in all treated leaves and roots. However, the accumulation of these sugars and sugar alcohols displayed opposing trends between Ca2+ and H2O2 application in salt-stressed plants, which suggests that these metabolites are the common regulatory factor for Ca2+ and H2O2 signals. These findings assist in understanding better the integrated network in Ca2+ and H2O2 of cool-season turfgrass’ response to salinity.

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Section: Discussionsupporting

confidence: 92%

H2O2 and Ca2+-based signaling and associated ion accumulation, antioxidant systems and secondary metabolism orchestrate the response to NaCl stress in perennial ryegrass

Chen²,

Hu³

et al. 2016

Sci Rep

Self Cite

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“…A similar study conducted by Hu et al (2012) on Lolium perenne also confirmed the role of GB as a stress protectant. The plants were subjected to NaCl stress and application of GB to them significantly enhanced growth, relative water content, transpiration rate, pigment content, and activities of the antioxidative enzymes.…”

Section: Salinity Stresssupporting

confidence: 66%

Osmolyte Dynamics

Sharma¹,

Bhardwaj²,

Thukral³

et al. 2014

Emerging Technologies and Management of Crop Stress Tolerance

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“…Salinity stress may cause damage to plant physiological processes by over accumulation of reactive oxygen species (ROS), ion toxicity, impairment of antioxidant defense systems, photosynthetic function, and imbalance of hormones (Hu et al, 2012, 2015; Kim et al, 2016). …”

Section: Introductionmentioning

confidence: 99%

“…Proline severs as osmoprotentant and antioxidant to protect cells under salt stress. Salt stress may cause nutrient imbalance with increasing uptake of Na + and decreasing K + , Mg 2+ , and Ca 2+ , resulting in Na + toxicity (Hu et al, 2012; Gu et al, 2016). …”

Section: Introductionmentioning

confidence: 99%

Physiological Mechanism of Enhancing Salt Stress Tolerance of Perennial Ryegrass by 24-Epibrassinolide

et al. 2017

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Brassinosteroids (BR) regulate plant tolerance to salt stress but the mechanisms underlying are not fully understood. This study was to investigate physiological mechanisms of 24-epibrassinolide (EBR)'s impact on salt stress tolerance in perennial ryegrass (Lolium perenne L.) The grass seedlings were treated with EBR at 0, 10, and 100 nM, and subjected to salt stress (250 mM NaCl). The grass irrigated with regular water without EBR served as the control. Salt stress increased leaf electrolyte leakage (EL), malondialdehyde (MDA), and reduced photosynthetic rate (Pn). Exogenous EBR reduced EL and MDA, increased Pn, chlorophyll content, and stomatal conductance (gs). The EBR applications also alleviated decline of superoxide dismutase (SOD) and catalase (CAT) and ascorbate peroxidase (APX) activity when compared to salt treatment alone. Salt stress increased leaf abscisic acid (ABA) and gibberellin A4 (GA4) content but reduced indole-3-acetic acid (IAA), zeatin riboside (ZR), isopentenyl adenosine (iPA), and salicylic acid (SA). Exogenous EBR at 10 nm and 100 nM increased ABA, and iPA content under salt stress. The EBR treatment at 100 nM also increased leaf IAA, ZR, JA, and SA. In addition, EBR treatments increased leaf proline and ions (K+, Mg2+, and Ca2+) content, and reduced Na+/K+ in leaf tissues. The results of this study suggest that EBR treatment may improve salt stress tolerance by increasing the level of selected hormones and antioxidant enzyme (SOD and CAT) activity, promoting accumulation of proline and ions (K+, Ca2+, and Mg2+) in perennial ryegrass.

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Exogenous Glycine Betaine Ameliorates the Adverse Effect of Salt Stress on Perennial Ryegrass

Cited by 118 publications

References 54 publications

H2O2 and Ca2+-based signaling and associated ion accumulation, antioxidant systems and secondary metabolism orchestrate the response to NaCl stress in perennial ryegrass

H2O2 and Ca2+-based signaling and associated ion accumulation, antioxidant systems and secondary metabolism orchestrate the response to NaCl stress in perennial ryegrass

Osmolyte Dynamics

Physiological Mechanism of Enhancing Salt Stress Tolerance of Perennial Ryegrass by 24-Epibrassinolide

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