作者
Sichul Lee, Joohyun Lee, Felipe K Ricachenevsky, Tracy Punshon, Ryan Tappero, David E Salt, Mary Lou Guerinot
发表日期
2021/11
期刊
The Plant Journal
卷号
108
期号
4
页码范围
1162-1173
简介
Zinc (Zn) is essential for normal plant growth and development. The Zn‐regulated transporter, iron‐regulated transporter (IRT)‐like protein (ZIP) family members are involved in Zn transport and cellular Zn homeostasis throughout the domains of life. In this study, we have characterized four ZIP transporters from Arabidopsis thaliana (IRT3, ZIP4, ZIP6, and ZIP9) to better understand their functional roles. The four ZIP proteins can restore the growth defect of a yeast Zn uptake mutant and are upregulated under Zn deficiency. Single and double mutants show no phenotypes under Zn‐sufficient or Zn‐limited growth conditions. In contrast, triple and quadruple mutants show impaired growth irrespective of external Zn supply due to reduced Zn translocation from root to shoot. All four ZIP genes are highly expressed during seed development, and siliques from all single and higher‐order mutants exhibited an increased …
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