Cross talk between Cu excess and Fe deficiency in the roots of rice

Gong, Xiao-Ran; Zhang, Shi‐Nan; Ye, Lina; Luo, Jia-Jun; Chang, Zhang

doi:10.1016/j.gene.2023.147491

Cited by 4 publications

(1 citation statement)

References 72 publications

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“…Cu is one of the micronutrients necessary for plant growth and development. Although Cu deficiency is adverse to the physiological reactions of cells, Cu excess causes reactive oxygen species bursts, resulting in toxicity in plant cells (Yamasaki et al ., 2009; Pilon, 2017; Gong et al ., 2023). Thus, it is crucial for plants to maintain Cu homeostasis.…”

Section: Discussionmentioning

confidence: 99%

IRON MAN interacts with Cu‐DEFICIENCY INDUCED TRANSCRIPTION FACTOR 1 to maintain copper homeostasis

Cai,

Ping,

Zhao

et al. 2023

New Phytologist

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Summary Copper (Cu) is essential for plant growth and development. IRON MAN (IMA) is a family of small peptides that can bind both iron (Fe) and Cu ions. It was reported that IMAs mediate Fe homeostasis in Arabidopsis thaliana. However, it remains unclear whether IMAs are involved in Cu homeostasis. The transcript abundance of IMA genes decreased in response to Cu deficiency. The combined disruption of all IMA genes caused enhanced tolerance to Cu deficiency and resulted in an increase in the transcript abundance of Cu uptake genes, whereas the overexpression of IMA1 or IMA3 led to the opposite results. Protein interaction assays indicated that IMAs interact with Cu‐DEFICIENCY INDUCED TRANSCRIPTION FACTOR1 (CITF1), which is a positive regulator of the Cu uptake genes. Further studies showed that IMAs not only interfere with the DNA binding of CITF1 but also repress the transcriptional activation activity of CITF1, hence resulting in downregulation of the Cu uptake genes. Genetic analyses indicated that IMAs modulate Cu homeostasis in a CITF1‐dependent manner. Our findings indicate that IMAs inhibit the functions of CITF1 in regulating Cu deficiency responses, thereby providing a conceptual framework for comprehending the regulation of Cu homeostasis.

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Section: Discussionmentioning

confidence: 99%

IRON MAN interacts with Cu‐DEFICIENCY INDUCED TRANSCRIPTION FACTOR 1 to maintain copper homeostasis

Cai,

Ping,

Zhao

et al. 2023

New Phytologist

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Copper excess transcriptional responses in roots of grapevine (Vitis sp.) rootstocks

Fiorentini,

Wairich,

Costa

et al. 2024

Journal of Hazardous Materials

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The balance between alleviating copper damage and maintaining root function during root pruning with excessive copper

Zhou,

Wu,

Jia

et al. 2024

Tree Physiology

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Coating high concentrations of copper (Cu) on the inner wall of containers can efficiently inhibit root entanglement of container-grown seedlings. However, how the protective and defensive responses of roots maintain root structure and function during Cu-root pruning is still unclear. Here, Duranta erecta seedlings were planted in the containers coated with 40 (T1), 80 (T2), 100 (T3), 120 (T4), 140 (T5), and 160 (T6) g L−1 Cu(OH)2 with containers without Cu(OH)2 as the control. Although T5 and T6 produced the best inhibitory effect on root entanglement, root anatomy structure was damaged. T1 and T2 not only failed to completely control root circling, but also led to decreased root activity and stunted growth. Cu(OH)2 treatments significantly increased lignin concentration of roots with the highest values at T3 and T4. Compared with T3, seedlings at T4 had higher height, biomass, and root activity and no significant root entanglement. Excessive Cu accumulation in Cu(OH)2 treatments changed the absorption of other mineral nutrients and their allocation in the roots, stems, and leaves. Overall, Ca was decreased while Mg, Mn, Fe, and K were increased, especially K and Mn at T4 which is related to defense capacity. The results indicate that there is a Cu threshold to balance root entanglement control, defense capacity, and nutrient uptake function under excessive Cu for container-grown D. erecta seedlings.

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Cross talk between Cu excess and Fe deficiency in the roots of rice

Cited by 4 publications

References 72 publications

IRON MAN interacts with Cu‐DEFICIENCY INDUCED TRANSCRIPTION FACTOR 1 to maintain copper homeostasis

IRON MAN interacts with Cu‐DEFICIENCY INDUCED TRANSCRIPTION FACTOR 1 to maintain copper homeostasis

Copper excess transcriptional responses in roots of grapevine (Vitis sp.) rootstocks

The balance between alleviating copper damage and maintaining root function during root pruning with excessive copper

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