Cytokinin-mitigation of salt-induced leaf senescence in perennial ryegrass involving the activation of antioxidant systems and ionic balance

Ma, Xiqing; Zhang, Jing; Huang, Bingru

doi:10.1016/j.envexpbot.2016.01.002

Cited by 65 publications

(47 citation statements)

References 50 publications

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“…Exogenous SA produces signals that enhance the activity of antioxidant enzymes in plants. Exogenous application of BAP on wheat [43] and perennial ryegrass plants [25] also increased antioxidant enzymes activities including APX, CAT and SOD under salinity.…”

Section: Discussionmentioning

confidence: 94%

“…The lower Na + content of the shoot is accompanied by higher K + content and K + /Na + ratio, which is required for normal cell functioning under salinity. Application of BAP reduced Na + and enhanced K + contents of ryegrass leaves through increasing transcription of HKT which serves as Na + /K + co-transporter [11,25], that inhibits the over-accumulation of Na + in the leaves [7].…”

Section: Discussionmentioning

confidence: 99%

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Exogenous salicylic acid and cytokinin alter sugar accumulation, antioxidants and membrane stability of faba bean

Samea-Andabjadid

Ghassemi‐Golezani

Nasrollahzadeh

et al. 2018

Acta Biologica Hungarica

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This research was conducted in a greenhouse to evaluate the effects of exogenous application of salicylic acid (SA) (1 mM) and 6-benzylaminopurine (BAP) (50 μM) on physiological performance of faba bean (Vicia faba) under different levels of NaCl salinity (0, 4, 8 and 12 dS/m). The experiment was arranged as factorial on the bases of randomized complete block design in three replications. Leaf Na content, root and leaf soluble sugars, antioxidant enzymes activities such as catalase (CAT), ascorbate peroxidase (APX), superoxide dismutase (SOD) and lipid peroxidation increased, but K, K/Na and membrane stability index (MSI) decreased as a result of salt stress. However, foliar sprays of BAP and particularly SA reduced Na content and lipid peroxidation, while enhanced the K content, K/Na, soluble sugars, antioxidant enzymes activities and MSI under different levels of salinity. It was, therefore, concluded that exogenous application of these growth regulators (GR) can considerably improve salt tolerance and physiological performance of faba bean.

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Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Exogenous salicylic acid and cytokinin alter sugar accumulation, antioxidants and membrane stability of faba bean

Samea-Andabjadid

Ghassemi‐Golezani

Nasrollahzadeh

et al. 2018

Acta Biologica Hungarica

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“…Application of 10 mM 6-BA reduced growth suppression in two eggplant (Solanum melongena) genotypes at 90 mM NaCl (Wu et al, 2014). Moreover, 6-BA (25 mM) promoted leaf elongation rate and decreased Na + concentration in perennial ryegrass cultivar Pinnacle exposed to 14, 21, and 28 d of 250 mM NaCl (Ma et al, 2016). The results suggested a positive role of 6-BA in improving plant growth and salinity tolerance.…”

mentioning

confidence: 84%

Effects of 6-Benzyladenine, γ-Aminobutyric Acid, and Nitric Oxide on Plant Growth, Photochemical Efficiency, and Ion Accumulation of Perennial Ryegrass Cultivars to Salinity Stress

Ji¹,

Camberato²,

Zhang³

et al. 2019

horts

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Plant growth regulators (PGRs) can mediate plant response to salinity stress. Perennial ryegrass (Lolium perenne) cultivars of BrightStar SLT, Catalina, Inspire, and SR4660ST were exposed to 0, 100, or 200 mm NaCl for 14 d. 6-benzyladenine (6-BA, 10 µm), γ-aminobutyric acid (GABA, 500 µm), nitric oxide (NO, 200 µm), and H2O were applied to the foliage every day for 3 days before stress and then every 2 days during salinity stress. Averaged across the four cultivars, a foliar spray of NO increased leaf fresh weight (FW) and dry weight (DW) at 0 mm NaCl, whereas application of 6-BA increased DW and GABA reduced Na+ concentration at 100 mm NaCl, compared with H2O application. Plants treated with 6-BA, GABA, and NO had less chlorotic and necrotic leaf tissue than plants treated with H2O at 200 mm NaCl. Spray of 6-BA and NO increased FW and DW, but application of all three PGRs maintained higher leaf photochemical efficiency and lower leaf Na+ concentration compared with H2O treatment at 200 mm NaCl. Across salinity and PGR treatments, ‘Catalina’ exhibited higher plant height than the ‘Inspire’ and SR4660ST, and SR4660ST had relatively higher Na+ concentration than ‘Catalina’ but not ‘BrightStar SLT’ and ‘Inspire’. The results demonstrate that 6-BA, GABA, and NO ameliorated salinity tolerance of perennial ryegrass by improving growth and photochemical efficiency or reducing Na+ accumulation.

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“…Similarly, treating plants with cytokinin shows different effects on salt tolerance depending on the species. Pretreating beans with cytokinin increases sensitivity to salt (Kirkham, Gardner, & Gerloff, ), whereas cytokinin treatment of wheat seedlings, potato, eggplant, and ryegrass increases salt tolerance (Abdullah & Ahmad, ; Ma, Zhang, & Huang, ; Naqvi, Ansari, & Khanzada, ; Wu, He, Chen, Yang, & Zha, ). Although cytokinin can improve salt tolerance, it is not clear why cytokinin levels decline under salt stress in many species (Fahad et al, ).…”

Section: Introductionmentioning

confidence: 99%

Natural variation in cytokinin maintenance improves salt tolerance in apple rootstocks

Feng

Liu

Zhai

et al. 2018

Plant Cell & Environment

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Plants experiencing salt-induced stress often reduce cytokinin levels during the early phases of stress-response. Interestingly, we found that the cytokinin content in the apple rootstock "robusta" was maintained at a high level under salt stress. Through screening genes involved in cytokinin biosynthesis and catabolism, we found that the high expression levels of IPT5b in robusta roots were involved in maintaining the high cytokinin content. We identified a 42 bp deletion in the promoter region of IPT5b, which elevated IPT5b expression levels, and this deletion was linked to salt tolerance in robusta×M.9 segregating population. The 42 bp deletion resulted in the deletion of a Proline Response Element (ProRE), and our results suggest that ProRE negatively regulates IPT5b expression in response to proline. Under salt stress, the robusta cultivar maintains high cytokinin levels as IPT5b expression cannot be inhibited by proline due to the deletion of ProRE, leading to improve salt tolerance.

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Cytokinin-mitigation of salt-induced leaf senescence in perennial ryegrass involving the activation of antioxidant systems and ionic balance

Cited by 65 publications

References 50 publications

Exogenous salicylic acid and cytokinin alter sugar accumulation, antioxidants and membrane stability of faba bean

Exogenous salicylic acid and cytokinin alter sugar accumulation, antioxidants and membrane stability of faba bean

Effects of 6-Benzyladenine, γ-Aminobutyric Acid, and Nitric Oxide on Plant Growth, Photochemical Efficiency, and Ion Accumulation of Perennial Ryegrass Cultivars to Salinity Stress

Natural variation in cytokinin maintenance improves salt tolerance in apple rootstocks

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