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Modulation of cell cycle progression and chromatin dynamic as tolerance mechanisms to salinity and drought stress in maize
Faculty
Agriculture
Year:
2020
Type of Publication:
ZU Hosted
Pages:
Authors:
Khaled Youssef Kamal Mostafa
Staff Zu Site
Abstract In Staff Site
Journal:
physiologia plantarum Wiley online Library
Volume:
Keywords :
Modulation , cell cycle progression , chromatin dynamic
Abstract:
Salinity and drought are the major abiotic stresses that disturb several aspects of maize plants growth at the cellular level, one of these aspects is cell cycle machinery. In our study, we dissected the molecular alterations and downstream effectors of salinity and drought stress on cell cycle regulation and chromatin remodeling. Effects of salinity and drought stress were determined on maize seedlings using 200 mM NaCl (induced salinity stress), and 250 mM mannitol (induced drought stress) treatments, then cell cycle progression and chromatin remodeling dynamics were investigated. Seedlings displayed severe growth defects, including inhibition of root growth. Interestingly, stress treatments induced cell cycle arrest in S‐phase with extensive depletion of cyclins B1 and A1. Further investigation of gene expression profiles of cell cycle regulators showed the downregulation of the CDKA, CDKB, CYCA, and CYCB. These results reveal the direct link between salinity and drought stress and cell cycle deregulation leading to a low cell proliferation rate. Moreover, abiotic stress alters chromatin remodeling dynamic in a way that directs the cell cycle arrest. We observed low DNA methylation patterns accompanied by dynamic histone modifications that favor chromatin decondensation. Also, the high expression of DNA topoisomerase 2, 6 family was detected as consequence of DNA damage. In conclusion, in response to salinity and drought stress, maize seedlings exhibit modulation of cell cycle progression, resulting in the cell cycle arrest through chromatin remodeling.
Author Related Publications
Khaled Youssef Kamal Mostafa , "Evaluating deficit irrigation scheduling strategies to improve yield and water productivity of maize in arid environment using simulation", ScienceDirect, 2022
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Khaled Youssef Kamal Mostafa , "Embedding Arabidopsis Plant Cell Suspensions in Low-Melting Agarose Facilitates Altered Gravity Studies", Springer, 2017
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Khaled Youssef Kamal Mostafa , "Cell cycle acceleration and changes in essential nuclear functions induced by simulated microgravity in a synchronized Arabidopsis cell culture", Wiley Online Library, 2018
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Khaled Youssef Kamal Mostafa , "Simulated microgravity, Mars gravity, and 2g hypergravity affect cell cycle regulation, ribosome biogenesis, and epigenetics in Arabidopsis cell cultures", Nature group, 2018
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Khaled Youssef Kamal Mostafa , "Sphingolipid-induced cell death in Arabidopsis is negatively regulated by the papain-like cysteine protease RD21", Elsevier, 2019
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Abdelrahman Alsayed Ahmed Omar, "EFFECT OF SOWING METHODS, SEEDING RATE AND CHEMICAL WEED CONTROLON WHEAT UNDER SANDY SOIL CODITIONS", كلية الزراعة جامعة الزقازيق, 2013
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