Li Suzhen, Zhou Xiaojin, Chen Jingtang, Chen Rumei
a Department of Agronomy , Agricultural University of Hebei/Hebei Sub-center of Chinese National Maize Improvement Center , Baoding , China.
b Department of Crop Genomics & Genetic Improvement , Biotechnology Research Institute, Chinese Academy of Agricultural Sciences , Beijing , China.
Plant Signal Behav. 2018 Apr 3;13(4):e1161877. doi: 10.1080/15592324.2016.1161877. Epub 2018 Apr 16.
Iron is a metal micronutrient that is essential for plant growth and development. Graminaceous and nongraminaceous plants have evolved different mechanisms to mediate Fe uptake. Generally, strategy I is used by nongraminaceous plants like Arabidopsis, while graminaceous plants, such as rice, barley, and maize, are considered to use strategy II Fe uptake. Upon the functional characterization of OsIRT1 and OsIRT2 in rice, it was suggested that rice, as an exceptional graminaceous plant, utilizes both strategy I and strategy II Fe uptake systems. Similarly, ZmIRT1 and ZmZIP3 were identified as functional zinc and iron transporters in the maize genome, along with the determination of several genes encoding Zn and Fe transporters, raising the possibility that strategy I Fe uptake also occurs in maize. This mini-review integrates previous reports and recent evidence to obtain a better understanding of the mechanisms of Fe uptake in maize.
铁是一种金属微量元素，对植物生长发育至关重要。禾本科植物和非禾本科植物进化出了不同的机制来介导铁的吸收。一般来说，拟南芥等非禾本科植物采用策略I，而水稻、大麦和玉米等禾本科植物被认为采用策略II吸收铁。对水稻中OsIRT1和OsIRT2的功能进行表征后，有人提出，水稻作为一种特殊的禾本科植物，同时利用策略I和策略II铁吸收系统。同样，在玉米基因组中，ZmIRT1和ZmZIP3被鉴定为功能性锌和铁转运蛋白，同时还确定了几个编码锌和铁转运蛋白的基因，这增加了玉米中也存在策略I铁吸收的可能性。这篇小型综述整合了以前的报告和最新证据，以更好地了解玉米中铁吸收的机制。
