Biochemical and molecular changes in rice seedlings (Oryza sativa L.) to cope with chromium stress

Plant Biology
A H Kabir

Abstract

Chromium (Cr) is very toxic to both humans and plants. This investigation aimed to understand the physiological and molecular responses of rice seedlings to Cr stress. Cr toxicity did not significantly affect morphological features and Cr accumulation in roots and shoots in Pokkali but not in BRRI 51, although there was a reduction in chlorophyll concentration in leaves of both genotypes. These results imply that Pokkali has mechanisms to cope with Cr supplementation. We therefore performed quantitative real-time PCR on the expression pattern of two chelator genes, OsPCS1 and OsMT1, but there were no significant changes in expression in roots and shoots of Pokkali and BRRI 51 following Cr stress. This suggests that there was no metal sequestration following heavy metal stress in roots of these genotypes. Moreover, no expression of two heavy metal transporter genes, OsHMA3 and OsNRAMP1, was induced after Cr stress in roots and shoots, suggesting that these transporter genes are not induced by Cr stress or might not be involved in Cr uptake in rice. We also performed a targeted study on the effect of Cr on Fe uptake mechanisms. Our studies showed a consistent reduction in Fe uptake, Fe reductase activity and expression of Fe-rela...Continue Reading

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Citations

Apr 12, 2016·Plant Physiology and Biochemistry : PPB·Most Champa BegumAhmad Humayan Kabir
Jul 20, 2016·International Journal of Phytoremediation·A K M Nazmul HudaAhmad Humayan Kabir
Aug 12, 2016·Frontiers in Plant Science·Ahmad H KabirSyed A Haider
Oct 14, 2016·Ecotoxicology and Environmental Safety·Mohammad Farhadur RahmanAhmad Humayan Kabir
Jun 1, 2019·International Journal of Phytoremediation·Mosammad Rima KhatunA K M Nazmul Huda
Nov 7, 2019·Biotechnology and Bioengineering·Nishat PassrichaNarendra Tuteja
May 15, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Izhar MuhammadKun-Ming Chen
Nov 5, 2017·Environmental Science and Pollution Research International·Ramkrishna NirolaChristopher Saint

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