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001-es BibID:BIBFORM107897
Első szerző:Alsaeedi, Abdullah
Cím:Application of silica nanoparticles induces seed germination and growth of cucumber (Cucumis sativus) / A. H. Alsaeedi, M. M. Elgarawany, H. El-Ramady, T. Alshaal, A. O. A. AL-Otaibi
Dátum:2019
ISSN:1319-1039 1658-4287
Megjegyzések:Five rates of nano-silica (NS) suspensions (0, 100, 200, 300 and 400 mg L-1) were used to study their effects on seed germination and growth development of cucumber (Cucumis sativus). The rate of 200 mg L-1 significantly increased final germination%, germination speed, vigor index, and germination index by 28.7, 70.3, 46.7 and 68.8 %, respectively, compared to untreated seeds. However, it reduced the mean germination time by 31.7%. Similarly, 200 mg L-1 NS had the highest fresh and dry weight of germinant. However, all NS treatments enhanced the seed germination and growth development in comparison to control.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:28 : 1 (2019), p. 57-68. -
További szerzők:El-Garawany, Mohamed El-Ramady, Hassan (1969-) (agrármérnök) Alshaal, Tarek Ali Ahmed Ibrahim (1980-) (Soil Scientist) Al-Otaibi, Awadh
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2.

001-es BibID:BIBFORM107524
035-os BibID:(Scopus)85042186157 (WOS)000428832200017
Első szerző:Alsaeedi, Abdullah
Cím:Exogenous nanosilica improves germination and growth of cucumber by maintaining K+/Na+ ratio under elevated Na+ stress / Abdullah Alsaeedi, Hassan El-Ramady, Tarek Alshaal, Mohamed El-Garawani, Nevien Elhawat, Awadh Al-Otaibi
Dátum:2018
ISSN:0981-9428
Megjegyzések:The current work was aimed to elucidate the role of engineered nanosilica (SiNPs) particles to mitigate the damaging impacts of Na+-derived salinity on cucumber (Cucumis sativus) Beit Alpha variety by conducting in vitro experiments applying various Na+ concentrations i.e. 0, 1000, 2000, 3000, 4000 and 5000 mg L?1. By treating seeds and seedlings, respectively, of cucumber with SiNPs (0, 100, 200 and 300 ppm) and subsequent determination some germination and vegetative parameters as well as chemical analysis of seedlings, we verified that SiNPs succeeded to alleviate the detrimental effects of high Na+ salinity by increasing germination parameters and vegetative growth of cucumber seedlings. Even as little as 100 ppm of N-Si results in considerable improvement of seed germination and seedlings growth of cucumber compared to the control, while 200 ppm was optimal among the doses tested. At 5000 mg Na+ L?1, applying SiNPs with 200 ppm increased final germination percentage by 101% over control, vigor index by 101%, germination rate index by 116%, germination index by 110%, fresh mass by 13%, K+/Na+ ratio by 77%, shoot dry mass by 384%, root dry mass by 304% and plant height by 70%. The results mentioned in this paper obviously outline the large practical relevance of SiNPs and imply that applying of SiNPs for cucumber seeds and seedlings under high Na+-derived salinity enhances germination and growth as a result for decreasing Na+ uptake and sequentially improves high K+/Na+ ratio.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Nanosilica
Seed germination
Seedlings development
Germination rate index
Na+ -stress
Cucumber
Megjelenés:Plant Physiology And Biochemistry. - 125 (2018), p. 164-171. -
További szerzők:El-Ramady, Hassan (1969-) (agrármérnök) Alshaal, Tarek Ali Ahmed Ibrahim (1980-) (Soil Scientist) El-Garawany, Mohamed Elhawat, Nevien Adel (1984-) (agrármérnök) Al-Otaibi, Awadh
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3.

001-es BibID:BIBFORM107519
035-os BibID:(WOS)000469896200001 (Scopus)85062727999
Első szerző:Alsaeedi, Abdullah
Cím:Silica nanoparticles boost growth and productivity of cucumber under water deficit and salinity stresses by balancing nutrients uptake / Abdullah Alsaeedi, Hassan El-Ramady, Tarek Alshaal, Mohamed El-Garawany, Nevien Elhawat, Awadh Al-Otaibi
Dátum:2019
ISSN:0981-9428 1873-2690
Megjegyzések:The role of amorphous silica nanoparticles (SiNPs) in enhancing growth and yield of cucumber under water deficit and salinity stresses was assessed. A field experiment under greenhouse conditions was established using 4 different levels of SiNPs (100, 200, 300 and 400 mg kg(-1)) and 3 different watering regimes calculated based on crop evapotranspiration (ET,) (100, 85 and 70% of ETc). Electrical conductivity and sodium adsorption ratio of irrigation water were 1.7 dS m(-1) and 4.63 respectively. The results revealed that SiNPs improved growth and productivity of cucumber regardless of quantity of supplied water; however, the greatest increase corresponded to irrigating cucumber at the rate of 85% of ETc. Applying SiNPs at rate of 200 mg kg(-1) showed the greatest increase specially when cucumber plants received 85% of their ETc causing an increase of 20, 51 and 156% in plant height, chlorophyll and fruit yield, respectively, compared to untreated plants. These increases could be due to alerting nutrient uptake as SiNPs clearly increased contents of nitrogen (by 30%), potassium (by 52, 75 and 41% in root, stem and leaf, respectively) and silicon (by 51, 57, 8 and 78% in root, stem, leaf and fruit, respectively). Otherwise, same treatment reduced sodium uptake by 38, 77 and 38% in root, stem and leaf, respectively; consequently, potassium-sodium ratio increased by 149, 735 and 127% in root, stem and leaf, respectively. The significant role of SiNPs in mitigating water deficit and salinity stresses could be referred to high silicon content found in leaf which regulates water losses via transpiration. Also, high K content found in roots of cucumber helps plants to tolerate abiotic stresses as a result of maintaining ion homeostasis and regulating the osmotic balance as well as controlling stomatal opening which helps plants to adapt to salinity and water deficit stresses.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Water deficit
Salinity
Silica nanoparticles
Nutrient use efficiency
Cucumber
Megjelenés:Plant Physiology And Biochemistry. - 139 (2019), p. 1-10. -
További szerzők:El-Ramady, Hassan (1969-) (agrármérnök) Alshaal, Tarek Ali Ahmed Ibrahim (1980-) (Soil Scientist) El-Garawany, Mohamed Elhawat, Nevien Adel (1984-) (agrármérnök) Al-Otaibi, Awadh
Pályázati támogatás:EFOP-3.6.2- 16-2017-00001
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