Influence of Strigolactone (GR24) as a Seed Treatment on Growth, Gas Exchange and Chlorophyll Fluorescence of Wheat under Saline Conditions

Kausar, Farhana; Shahbaz, Muhammad

doi:10.17957/ijab/15.0283

Cited by 30 publications

(12 citation statements)

References 38 publications

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“…A considerable reduction in net CO 2 assimilation rate (A), transpiration rate (E), stomatal conductance (g s ), and water use efficiency (A/E) was recorded under 450 mM NaCl stress in both quinoa accessions (Table 1, Figure 2). These findings were in accordance with results obtained from okra (Saeed et al, 2016) and wheat (Kausar and Shahbaz, 2017) etc. Decreased stomatal conductance was also observed by Negi et al (2014) under salinity.…”

Section: Physiological Parameterssupporting

confidence: 93%

“…Ames-13737 and PI-634919 (Table 1, Figure 1). These results follow the results of previous studies in many crops like wheat (Kausar and Shahbaz, 2017) and sunflower (Lalarukh and Shahbaz, 2018), and this reduction is credited to excessive ROS production and metabolic disorders produced under stress condition. Ion toxicity and higher osmotic stress is another reason which might be responsible for reduction in growth parameters (Hasanuzzaman et al, 2013).…”

Section: Morphological Parameterssupporting

confidence: 91%

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Presowing seed treatment with glycine betaine confers NaCl tolerance in quinoa by modulating some physiological processes and antioxidant machinery

Maqsood¹,

Shahbaz²,

Arfan³

et al. 2020

Turk J Bot

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IntroductionGlobal warming induced climatic changes are among the major causes for salinity and drought stresses which ultimately reduce plant growth and yield. Therefore, the study of different physiological processes in plants is of prime importance for improvement in food security (Abdallah et al., 2020). Salinization, as a serious problem, is increasing day by day worldwide and considerably affects the arable lands particularly in dryland environments. Up to the mid of 21st century, 50% arable land will be lost due to salinity as the salinity is increasing about 10% annually (Al-Dakheel and Hussain, 2016). Accumulation of salts changes different physiological mechanisms like gas exchange parameters and chlorophyll fluorescence in crop plants (Shahbaz et al., 2017). Salinity also disturbs the numerous metabolic processes especially CO 2 assimilation rate and reduces the growth in rice (Shahbaz and Zia, 2011) and sunflower (Lalarukh and Shahbaz, 2018). Salinity is a major factor that reduces plant development and yield (Shahbaz et al., 2017;Lalarukh and Shahbaz, 2018).Oxidative stress generated due to excessive production of reactive oxygen species (ROS) leads to the upregulation of defensive mechanism in plants, i.e., enzymatic (catalase, superoxide dismutase and peroxidase) as well as nonenzymatic (ascorbate, tocopherol and phenolics) antioxidants (Shafiq et al., 2015). Enzymatic antioxidants support the steady development and reclamation of ROS, produced under stress condition. Being a halophyte, quinoa has a diversified range of different salt tolerant mechanisms (Ruiz et al., 2016).Halophytes are used as a source of food even under high saline conditions. Because of its tolerance to different abiotic stresses and superior nutritional profile, quinoa has a great potential to meet human food resources (Ruiz et al., 2016). Quinoa has strong ability to survive in harsh environmental conditions like salinity and drought.

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Section: Physiological Parameterssupporting

confidence: 93%

Section: Morphological Parameterssupporting

confidence: 91%

Presowing seed treatment with glycine betaine confers NaCl tolerance in quinoa by modulating some physiological processes and antioxidant machinery

Maqsood¹,

Shahbaz²,

Arfan³

et al. 2020

Turk J Bot

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“…Hundred healthy seeds of each of two sunflower cultivars (FH-572 and FH-621) were soaked in 100 mL of four alpha tocopherol levels i.e. control (distilled water), 100, 200, 300 mg L -1 separately for 16 h and were blot dried (Kausar and Shahbaz, 2017) before sowing in pots containing sand. Stock solution of α-tocopherol was prepared by dissolving it in 2 mL ethanol then above stated concentrations were maintained by diluting it with distilled water.…”

Section: Methodsmentioning

confidence: 99%

“…Plants deficient in α-tocopherol exhibit deprived germination, poor seedling growth, impair photo-assimilate translocation and accelerate leaf senescence (Sattler et al, 2004(Sattler et al, , 2006. Adverse effects of salt stress on growth of various plant species have been studied (Shahbaz and Ashraf, 2013;Masood and Shahbaz, 2016;Kausar and Shahbaz, 2017). On the contrary, there is little acquaintance about role of alpha tocopherols in improving salinity tolerance in plants.…”

Section: Introductionmentioning

confidence: 99%

Alpha-Tocopherol Induced Modulations in Morpho-Physiological Attributes of Sunflower (Helianthus annuus) Grown under Saline Environment

Lalarukh¹

2018

IJAB

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Among abiotic stresses salinity is one of the serious threats for food security worldwide. Sunflower is ranked 5 th among crops grown for food security and being moderately salt tolerant is a better choice for growing on saline soil. Application of various compounds including vitamin E might be a beneficial technique for improving growth in plants under saline conditions. A pot experiment was conducted to explore the role of alpha tocopherol seed treatment for inducing salt tolerance in sunflower. Seeds of two sunflower cultivars (FH-572 and FH-621) were soaked for 16 h in four levels of alpha tocopherol i.e. control (distilled water), 100, 200, 300 mg L-1 and two levels of NaCl salt (0 and 120 mM) were applied with full strength Hoagland's solution 35 days after seed sowing. Salt stress caused significant decrease in shoot and root fresh weight, leaf relative water content and inhibition in shoot length. Salinity stress increased leaf turgor potential and had non-significant effect on photosynthetic pigments, osmotic potential and gas exchange characteristics. Seed treatment with α-tocopherol considerably increased shoot and root fresh weight, shoot length, net CO2 assimilation rate, stomatal conductance (gs) and water use efficiency; however, it showed non-significant effect on photosynthetic pigments, leaf water relation parameters and transpiration rate. Alpha tocopherol, 100 and 300 mg L-1 levels were effective in ameliorating the negative impact of salt stress in cv. FH-572 and cv. FH-621, respectively. Results depicts great varietal difference in salinity tolerance and cultivar FH-621 performed better than cv. FH-572 under salinity stress.

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“…Despite having high nutritional value, its successful production is affected by drastic effects of soil and water salinization [3]. Salinity directly impacts growth attributes and physiological processes, ultimately affecting whole plant [4]. Salt stress may shunt oxidation by inducing reactive oxygen species (ROS) [5].…”

Section: Introductionmentioning

confidence: 99%

Alpha Tocopherol Application as Seed Priming Alters Antioxidative Defense System of Okra Against Salinity Stress

Naqve¹,

Shahbaz²,

Naseer³

et al. 2021

Pol. J. Environ. Stud.

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Priming with antioxidants like α-tocopherol is a pragmatic method to alleviate salinity effects. In this study, seeds of two okra varieties (Noori and Sabzpari) were primed for 16 h before sowing with α-tocopherol levels [0 (distilled water), 100, 200 and 300 mg L -1 ] and salinity levels (0 and 100 mMNaCl) were maintained after sowing the seeds in plastic pots. Salt stress reduced the fresh biomass and yield while, increased the antioxidants activities(CAT, GPX, SOD and protease) total soluble sugars, reducing sugars, MDA, H 2 O 2 , total soluble proteins, glycinebetaine and free proline contents of tested okra varieties. Whereas non-significant effect of salinity was recorded for non-reducing sugars, ascorbic acid, total phenolics and activity of POD in tested okra varieties. Alpha tocopherol seed priming proved effective in improving root and shoot fresh biomass, yield, sugars, total soluble proteins, glycinebetaine content and activities/concentration of antioxidants (ascorbic acid, total phenolics, GPX, SOD and protease) in both tested varieties under saline regime. Though, no significant alteration was observed on the concentration of MDA, H 2 O 2 and free proline content due to alpha tocopherol seed priming treatment. Among all α-tocopherol levels used inclusively 200 and 300 mg L -1 were more active. In addition, variety Noori performed better than Sabzpari in all traits.

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Influence of Strigolactone (GR24) as a Seed Treatment on Growth, Gas Exchange and Chlorophyll Fluorescence of Wheat under Saline Conditions

Cited by 30 publications

References 38 publications

Presowing seed treatment with glycine betaine confers NaCl tolerance in quinoa by modulating some physiological processes and antioxidant machinery

Presowing seed treatment with glycine betaine confers NaCl tolerance in quinoa by modulating some physiological processes and antioxidant machinery

Alpha-Tocopherol Induced Modulations in Morpho-Physiological Attributes of Sunflower (Helianthus annuus) Grown under Saline Environment

Alpha Tocopherol Application as Seed Priming Alters Antioxidative Defense System of Okra Against Salinity Stress

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