Maize Genotypes With Different Zinc Efficiency in Response to Low Zinc Stress and Heterogeneous Zinc Supply

• DOI: 10.3389/fpls.2021.736658
• Publication Date: 2021-10-10T17:09:21Z
• Authors: Jianqin Xu; Xuejie Wang; Huaqing Zhu; Futong Yu
• Keywords: Dry weight

All over the world, a common problem in soil is low content of available zinc (Zn), which unevenly distributed and difficult to move. However, information on foraging strategies roots response heterogeneous Zn supply still very limited. Few studies have analyzed adaptability maize inbred lines with different efficiencies stress time lengths maize. This study effects various related traits lines. In addition, morphological plasticity Zn-related important gene iron-regulated transporter-like proteins (ZIPs) were studied via simulating heterogeneity nutrition soil. this report, when deficiency duration was extended (from 14 21 days), under Zn-deficient (0.5 μM), efficiency (ZE) based shoot dry weight Wu312 displayed no significant difference, ZE for Ye478 increased by 92.9%. Under longer-term deficiency, shoot, root weights 6.5 2.1-fold higher than those Wu312, respectively. Uneven strongly inhibited development some -Zn region. Difference between larger T1 (1.97 times) T2 (1.53 times). condition supply, both region +Zn upregulated expressions ZmZIP3, ZmZIP4, ZmZIP5, ZmZIP7, ZmZIP8 two These results indicate that length low-Zn will enlarge difference multiple physiological traits, especially biomass, Zn-sensitive Zn-tolerant There genotypic differences morphology supply. Compared split-supply +Zn/+Zn, above-ground biomass -Zn/+Zn higher. several ZmZIP genes may play roles tolerance stress, can provide basis further functional characterization.