Biomass and Some Physiological Aspects of Spartina patens Grown under Salt Affected Environment in South Sinai

Tawfik, Mohammad; Badr, Elham A.; Ibrahim, Omar M.; Elh, Ebtihal M. Abd; Sadak, Mervat Shamoon

doi:10.3923/ijar.2017.19.27

Cited by 8 publications

(8 citation statements)

References 20 publications

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“…In the present work, salinity stress caused significant increases in free amino acids and proline contents whereas decreased by trehalose application (Table 6). These increased levels of free amino acids and proline were obtained in different plant under abiotic stress (Mostafa et al 2015, Sadak 2016a, 2016b, and Tawfik et al 2017. They concluded that these compounds have an important role in enhancing tolerance of plant cells to various abiotic stress via increasing osmotic pressure in the cytoplasm and increasing relative water contents essential for plant growth and different metabolic processes.…”

Section: Discussionmentioning

confidence: 89%

“…Data show accumulation of different carbohydrates constituents as glucose sucrose, trehalose, TSS, and starch contents. Although accumulation of high soluble sugar levels has also been demonstrated in shoots of different plant species under salinity stress conditions (Rady et al 2015;Bakhoum and Sadak 2016;and Tawfik et al 2017). Increased levels of soluble sugars in salinity-stressed plants may help in turgor upkeeping and cellular membrane stabilization (Hosseini et al 2014).…”

Section: Discussionmentioning

confidence: 99%

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Physiological role of trehalose on enhancing salinity tolerance of wheat plant

Sadak

2019

Bull Natl Res Cent

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Background: Salinity stress is one of the most serious abiotic stress affecting adversely plant growth, various metabolic processes, and crop production. Using different osmoprotectants such as trehalose in alleviating salinity stress adverse effects is very important for plant production. So, the present study investigated the physiological role of trehalose (Tre) in improving wheat tolerance to oxidative stress induced by salt stress. Results: Salinity stress (6.25 dS/m) caused marked significant decreases in wheat plant growth parameters (shoot height, fresh, and dry weights of the shoot) accompanied by significant increases in lipid peroxidation, hydrogen peroxide contents, and lipoxygenase enzyme (LOX) activity. Osmoprotectant compounds such as glucose, sucrose, trehalose, total soluble sugars (TSS), free amino acids, and proline increased in wheat plants irrigated with saline water compared with unstressed control plant. On the other hand, Tre foliar treatments (10 mM and 50 mM) proved to be effective in enhancing growth parameters and more accumulation of the tested organic solutes of leaves (glucose, sucrose, trehalose, and TSS) of salinity-stressed plants. Meanwhile, trehalose treatments with different levels caused significant decreases in lipid peroxidation, hydrogen peroxide contents, and LOX activity in normally irrigated and salinity-stressed plants. These decreases correlated with significant increases in total phenolic contents as compared with untreated control. Conclusion: It could be concluded that foliar spray of trehalose was effective in improving wheat performance by reducing hydrogen peroxide free radical and by enhancing antioxidant compounds (phenolics), compatible osmolytes, and membrane stability.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Physiological role of trehalose on enhancing salinity tolerance of wheat plant

Sadak

2019

Bull Natl Res Cent

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“…Concerning the effect of salicylic acid on the tested biochemical constituents, similar results were shown by Abdallah et al 48 on wheat plants who reported that plant resistance to stress improved by the significant increase in TSS, proline, FAA and phenolic contents. In this concern, Tawfik et al 60 decided that increasing TSS, proline and free amino acids improved plant cells tolerance to salinity stress throughout increasing osmotic pressure in the cytoplasm as well as relative water contents essential for plant growth. In addition, Ashraf and Foolad 61 stated that proline induces vital roles in preventing damaging effects of osmotic stresses expressed in forms of osmotic adjustment, stabilization and protection of enzymes, proteins and membranes.…”

Section: Discussionmentioning

confidence: 99%

Effectiveness of Natural Antioxidants on Physiological, Anatomical Changes and Controlling Downy, Powdery Mildew and Rust Diseases in Pea Plants

Khalil¹,

Ramadan²,

El-Sayed³

et al. 2023

Asian J. of Plant Sciences

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Background and Objective: Pea (Pisum sativum L.) was attacked by many foliar diseases. Downy mildew, powdery mildew and rust are the most common diseases that affect the quantity and quality of this crop. To control these diseases, certain natural organic acids, e.g., citric, benzoic, salicylic, boric, sorbic acids and also coumarin were foliar sprayed to examine the possibility of avoiding the adverse effect of biotic stress. Materials and Methods: The experiment was conducted at Kafr-El-Dwar district, Beheira Governorate, Egypt during 2 successive summer seasons of 2019 and 2020 to evaluate pea plants foliar spray with some organic acids and coumarin at the rate of 0.25 and 0.50% against some foliar diseases. Results: The results proved that citric and benzoic acids at 0.50% induced the highest reduction of downy, powdery mildew and rust, while coumarin recorded the lowest reduction at the same concentration and other tested materials came moderately. Moreover, all tested substances gave clear increases in crop parameters and alleviated the harmful effects of biotic (diseases) stress. Acceleration in the recovery in terms of enhancing photosynthetic pigments, indole acetic acid, phenolic, some compatible solutes and antioxidant content was recorded. Also, a positive variation in anatomical structure, e.g., the leaflet blade thickness, upper and lower epidermal layers, vascular bundles, midrib zone, palisade and spongy tissues was noticed. Conclusion: Conclusively, foliar spraying with tested materials alleviated the harmful effects of biotic stress and accelerated the recovery and improved pea plants productivity.

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“…This increase in AM and proline under stress conditions may result from the degradation of proteins, affect their synthesis, inactivate major enzymes, and destroy membranes ( Fahad et al, 2017 ; Sallam et al, 2018a ; Dawood et al, 2020 ). Increased levels of free amino acids and proline were identified in different plants under abiotic stress ( Sadak, 2016b , 2016a ; Tawfik et al, 2017 ; Sallam et al, 2018a ). It was concluded that these compounds have an important role in enhancing the tolerance of plant cells to various abiotic stresses by increasing the osmotic pressure in the cytoplasm and increasing the relative water content, which is essential for plant growth and different metabolic processes.…”

Section: Discussionmentioning

confidence: 99%

Genetic and morpho-physiological analyses of the tolerance and recovery mechanisms in seedling stage spring wheat under drought stress

et al. 2022

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Drought is one of the complex abiotic stresses that affect the growth and production of wheat in arid and semiarid countries. In this study, a set of 172 diverse spring wheat genotypes from 20 different countries were assessed under drought stress at the seedling stage. Besides seedling length, two types of traits were recorded, namely: tolerance traits (days to wilting, leaf wilting, and the sum of leaf wilting), and recovery traits (days to regrowth, regrowth biomass, and drought survival rate). In addition, tolerance index, recovery index, and drought tolerance index (DTI) were estimated to select the most drought tolerant genotypes. Moreover, leaf protein content (P), amino acid (AM), proline content (PRO), glucose (G), fructose (F), and total soluble carbohydrates (TSC) were measured under control and drought conditions to study the changes in each physiological trait due to drought stress. All genotypes showed a high significant genetic variation in all the physio-morphological traits scored under drought stress. High phenotypic and genotypic correlations were found among all seedling morphological traits. Among the studied indices, the drought tolerance index (DTI) had the highest phenotypic and genotypic correlations with all tolerance and recovery traits. The broad-sense heritability (H2) estimates were high for morphological traits (83.85–92.27), while the physiological traits ranged from 96.41 to 98.68 under the control conditions and from 97.13 to 99.99 under drought stress. The averages of the physiological traits (proteins, amino acids, proline, glucose, fructose, and total soluble carbohydrates) denoted under drought stress were higher than those recorded under well-watered conditions except for proteins. In this regard, amino acids, glucose, and total soluble carbohydrates had a significant correlation with all morphological traits. The selection for drought tolerance revealed 10 tolerant genotypes from different countries (8 genotypes from Egypt, one from Morocco, and one from the United States). These selected genotypes were screened for the presence of nine specific TaDREB1 alleles. Six primers were polymorphic among the selected genotypes. Genetic diversity among the selected genotypes was investigated using 21,450 SNP markers. The results of the study shed light on the different mechanisms for drought tolerance that wheat plants use to tolerate and survive under drought stress. The genetic analysis performed in this study suggested the most suitable genotypes for selective breeding at the seedling stage under water deficit.

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Biomass and Some Physiological Aspects of Spartina patens Grown under Salt Affected Environment in South Sinai

Cited by 8 publications

References 20 publications

Physiological role of trehalose on enhancing salinity tolerance of wheat plant

Physiological role of trehalose on enhancing salinity tolerance of wheat plant

Effectiveness of Natural Antioxidants on Physiological, Anatomical Changes and Controlling Downy, Powdery Mildew and Rust Diseases in Pea Plants

Genetic and morpho-physiological analyses of the tolerance and recovery mechanisms in seedling stage spring wheat under drought stress

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