Keeping Nitrate in the Roots: An Unexpected Requirement for Cadmium Tolerance in Plants

• 来源期刊: 分子细胞生物学报（英文版）
• 年，卷（期）: 2010,（6）
• 页码范围: 299-301
• 页数: 3页
• 语种: 中文
• DOI: 10.1093/jmcb/mjq019

摘要

The nitrate ion (NO-3) is a major nitrogen source for higher plants. Following uptake from the soil solution into the plant, nitrate can be either stored in the vacuoles or assimilated to supply the nitrogen atom for amino acid biosynthesis. In many herbaceous species, nitrate assimilation occurs redominantly in the leaves (Andrews, 1986), where a large part of the reducing power needed for this process directLy originates from the photosystems.