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Cadmium (Cd) is one of the most toxic heavy metals and a non-essential element to all organisms, including plants; however, the genes involved in Cd resistance in plants remain poorly characterized. To identify Cd resistance genes in rice, we screened a rice cDNA expression library treated with CdCl using a yeast (Saccharomyces cerevisiae) mutant ycf1 strain (DTY167) and isolated two rice phytochelatin synthases (OsPCS5 and OsPCS15). The genes were strongly induced by Cd treatment and conferred increased resistance to Cd when expressed in the ycf1 mutant strain. In addition, the Cd concentration was 2-fold higher in yeast expressing OsPCS5 and OsPCS15 than in vector-transformed yeast, and OsPCS5 and OsPCS15 localized in the cytoplasm. Arabidopsis thaliana plants overexpressing OsPCS5/-15 paradoxically exhibited increased sensitivity to Cd, suggesting that overexpression of OsPCS5/-15 resulted in toxicity due to excess phytochelatin production in A. thaliana plants. These data indicate that OsPCS5 and OsPCS15 are involved in Cd tolerance, which may be related to the relative abundances of phytochelatins synthesized by these phytochelatin synthases. This article is protected by copyright. All rights reserved.
This article was published in the following journal.
Name: Plant biology (Stuttgart, Germany)
Seed size has been extensively studied in crop plants, as it determines crop yield. However, the mechanism of seed development remains elusive. In this study, we explored the mechanism of seed develop...
Rice (Oryza sativa L.) is one of the most important crops that serves as staple food for ~ 50% of the human population worldwide. Some important agronomic traits that allow rice to cope with numerou...
Host-plant resistance is the most desirable and economic way to overcome BPH damage to rice. As single-gene resistance is easily lost due to the evolution of new BPH biotypes, it is urgent to explore ...
Rice (Oryza sativa L.) is both a major staple food for the worldwide population and a model crop plant for studying the mode of action of agronomically valuable traits, providing information that can ...
LC/MS-based phytochemical analysis of an EtOH extract of the roots of rice (Oryza sativa; Gramineae), which takes a crucial role in the stable crop population in Asia, resulted in the isolation of a n...
Previous preclinical investigations have found that Medicago sativa promotes the decrease of glucose concentrations. To evaluate the acute effect of Medicago sativa administration on gluco...
This is a pilot study. The aim of the investigators' study is to evaluate the effectiveness of nigella sativa seed in the treatment of dyslipidemia. Dyslipidemia is a common risk f...
This study was conducted to investigate the effects of rice based-meal on functional constipation in young Korean women.
To find out whether consumption of different kinds of plant based functional food ingredients, traditionally used in Asia, can improve post-meal response of indicators of heart and metabol...
The purpose is to assess feasibility of rice bran consumption in weaning children and collect pilot data on gut microbiome and metabolome modulation with rice bran intake for diarrheal pre...
Annual cereal grass of the family POACEAE and its edible starchy grain, rice, which is the staple food of roughly one-half of the world's population.
A genus of grass family (Poaceae) that include several rice species.
The anamorphic form of the fungus MAGNAPORTHE GRISEA and the most important pathogen of rice worldwide. It causes rice blast which prevents maturation of the rice grains.
OIL extracted from the hard outer brown layer of rice bran after the husk has been removed.
A genus of DNA plant viruses in the family CAULIMOVIRIDAE. The sole species, Rice tungro bacilliform virus, shows 25% identity with BADNAVIRUS. It is transmitted by leafhoppers with the assistance of RICE TUNGRO SPHERICAL VIRUS.
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