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- 저자 : Wagdi Saber Soliman (검색결과 2 건)
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Wagdi Saber Soliman,Shu-ichi Sugiyama,Ahmed M. Abbas 한국원예학회 2018 Horticulture, Environment, and Biotechnology Vol.59 No.1
Salinity is a potential environmental stress factor for plants. Improving plant growth under salinity stress requires an understandingof resistance mechanisms. Salinity stress resistance is related to both salinity avoidance and tolerance. In this study,interspecific differences in salinity stress resistance, avoidance, and tolerance were examined in eight C3turfgrass species,namely Agrostis alba, Agrostis tenius, Dactylis glomerata, Festuca ovina, Festuca rubra, Lolium perenne, Phleum pratense,and Poa pratensis. In a greenhouse experiment, plants were exposed to 50, 100, or 200 mM NaCl for 2 weeks supplied via ahydroponics system. We found that interspecific differences in salinity stress resistance were associated mainly with salinitytolerance. Salinity avoidance mechanisms also contributed significantly to stress resistance. The contribution of genotypetowards interspecific variation in salinity resistance and tolerance was higher than that of Na+concentration. Salinity stresshad negative effects on shoot dry mass, water status, and membrane stability. Relative water content was significantly correlatedwith salinity resistance, avoidance, and tolerance, whereas no significant correlation was observed for ion leakage. Mineral contents showed no clear contribution to salinity tolerance. Species varied in their proline content even in controlconditions, and there was a positive association between proline content and salinity resistance and tolerance, but a negativeassociation between proline content and salinity avoidance. F. ovina and P. pratense displayed the highest and lowest salinitystress resistance, respectively. The results of this study suggest that both salinity tolerance and avoidance mechanismscontribute towards salinity resistance, and that variation in salinity stress resistance among species is attributed to differencesin proline content.
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Yahya Zakaria Hassanein,S. S. A. Abdel-Rahman,Wagdi Saber Soliman,Sabri Salaheldin 한국원예학회 2021 Horticulture, Environment, and Biotechnology Vol.62 No.6
Nanoparticles are one of the most widely studied materials in this century, and they have important uses in various fi elds,including agriculture. Bio-stimulants play a vital role in the sustainable development of horticultural crops. The aim of thisstudy was to assess the eff ect of nano zinc and bio-stimulants (salicylic acid, moringa extract, seaweed extract) on growth,yield, and quality of roselle plants. The experiment was conducted during 2018 and 2019 and was a completely randomizedsplit-plot design. Nano zinc oxide of 0, 5, 10, and 15 ppm was used as the main plot, and bio-stimulants were used as the subplot. The results showed that application of nano zinc led to signifi cant increases in growth, yield, photosynthetic pigments,as well as anthocyanin content associated with increased zinc content in leaves. The highest values of all traits occurredunder treatment of 10 ppm of nano zinc. Also, bio-stimulants showed positive eff ects on all traits, and the best results wereachieved under treatment with seaweed, followed by moringa extract. The correlation coeffi cients showed signifi cant positivecorrelations among calyxes yield and anthocyanin and zinc content as well as with other growth traits and photosyntheticpigments. These results highlighted the important role of nano zinc in improving the growth, yield, and quality of the roselleplant, as well as the positive eff ects of seaweed as a bioactive stimulant. Therefore, it is recommended to include nano zincand seaweed extract in fertilization programs for achieving a sustainable production system of such crops.
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