Biochar Decreases Soil Cadmium (Cd) Availability and Regulates Expression Levels of Cd Uptake/Transport-Related Genes to Reduce Cd Translocation in Rice

doi:10.1016/j.rsci.2024.04.004

摘要/Abstract

. [J]. Rice Science, 2024, 31(5): 494-498.

Fig. 1. Concentrations of Cd (A), iron (Fe, B), manganese (Mn, C), and zinc (Zn, D) in different tissues of rice varieties Zhongzao 39 (ZZ39) and Zhongjiazao 17 (ZJZ17) after application of biochar at the maturity stage. CK, Control group; RSB, Rice straw biochar; KWB, Kitchen waste biochar. Data are Mean ± SD (n = 3). Data with different lowercase letters are significantly different (P < 0.05) with regard to treatments for the same rice variety.

Fig. 2. Expression levels of OsNRAMP1, OsNRAMP5, OsHMA2, and OsHMA3 in roots of Zhongzao 39 (ZZ39) and Zhongjiazao 17 (ZJZ17) after application of biochar at the tillering stage (A), and a putative alleviation model illustrating possible role of biochar in Cd accumulation in rice varieties (B). CK, Control group; RSB, Rice straw biochar; KWB, Kitchen waste biochar; Bi, Biochar; GSH, Glutathione; MDA, Malondialdehyde. Data are Mean ± SD (n = 3). Data with different lowercase letters are significantly different (P < 0.05) with regard to treatments for the same variety. The red arrow indicates an increase, and the blue arrow indicates a decrease. The roots of ZZ39 and ZJZ17 at the tillering stage with different biochar applications were collected, and their total RNA was extracted for qRT-PCR analysis. OsActin was used as a reference gene to analyze the expression of the target genes.

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