A Berberine Bridge Enzyme-Like Protein, , Confers Soybean's Coordinated Adaptation to Aluminum Toxicity and Phosphorus Deficiency
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Phosphorus (P) deficiency and aluminum (Al) toxicity often coexist and are two major limiting factors for crop production in acid soils. The purpose of this study was to characterize the function of , a berberine bridge enzyme-like protein-encoding gene, in soybean () adaptation to Al and low P stresses. Present quantitative real-time PCR (qRT-PCR) assays confirmed the phosphate (Pi)-starvation enhanced and Al-stress up-regulated expression pattern of in soybean roots. Meanwhile, the expression of a chimera in both common bean hairy roots and tobacco leaves demonstrated its cell wall localization. Moreover, both transgenic Arabidopsis and soybean hairy roots revealed the function of in promoting root growth under both Al and low P stresses. -overexpression also resulted in more HO production on transgenic soybean hairy root surface with oligogalacturonides (OGs) application and antagonized the effects of Al on the expression of two genes. Taken together, our results suggest that might be involved in the soybean's coordinated adaptation to Al toxicity and Pi starvation through modulation of OGs-oxidation in the cell wall.
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