Wang Yikai, Hu Hongmei, Li Binyang, Zhang Shuhao, Liu Lisong, Qi Jingxiao, Zhao Wei, Su Yulu, Wang Yarong, Liu Jin, Liu Dan, Wu Ling, Zhang Xiao, Luo Bowen, Gao Shiqiang, Gao Duojiang, Zhuo Shihai, Gao Shibin
Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100080, China.
Clinical Medical College & Affiliated Hospital, North Sichuan Medical College, Nanchong, 637100, Sichuan, China.
Planta. 2025 Apr 16;261(5):113. doi: 10.1007/s00425-025-04695-0.
Iron deficiency resulted in reduced sensitivity of the enhanced iron tolerance in maize o213 mutants, affecting pigment synthesis, photosynthesis parameters, sugar content, and iron distribution, with variable expression of the YSL gene. Iron (Fe) is a vital trace element for the growth and development of plants. A deficiency of this element results in the formation of yellow leaves. The present study demonstrated that a mutation in the ZmYSL2 gene resulted in reduced sensitivity of o213 mutant maize seedlings to Fe deficiency. The mutation resulted in a reduction in the content of photosynthetic pigments in the leaves, particularly carotenoids, and a decline in photosynthetic parameters. However, it is noteworthy that the soluble sugar content was increased. The mutant displayed increased iron accumulation in the roots and decreased accumulation in the shoots, accompanied by elevated iron content in the sap of the phloem. The expression pattern of the ZmYSL2 gene demonstrated a correlation between its expression level and the iron deficiency phenotype. In conclusion, the results of this study demonstrate that the ZmYSL2 gene plays a crucial physiological role in enabling maize to adapt to an iron-deficient environment.
缺铁导致玉米o213突变体增强的铁耐受性敏感性降低，影响色素合成、光合作用参数、糖含量和铁分布，YSL基因表达存在差异。铁（Fe）是植物生长发育所必需的微量元素。该元素缺乏会导致黄叶形成。本研究表明，ZmYSL2基因突变导致o213突变体玉米幼苗对缺铁的敏感性降低。该突变导致叶片光合色素含量降低，尤其是类胡萝卜素，光合参数下降。然而，值得注意的是可溶性糖含量增加。突变体根部铁积累增加，地上部积累减少，同时韧皮部汁液中铁含量升高。ZmYSL2基因的表达模式表明其表达水平与缺铁表型之间存在相关性。总之，本研究结果表明ZmYSL2基因在使玉米适应缺铁环境中发挥着关键的生理作用。
