Abstract
The plant funiculus anchors the developing seed to the placenta within the inner dorsal pod strands of the silique wall and directly transports nutrients to the seeds. The lignified vasculature critically supports nutrient transport through the funiculus. However, molecular mechanisms underlying lignified secondary cell wall (SCW) biosynthesis in the funiculus remain elusive. Here, we show that the transcription factor ZINC FINGER PROTEIN2 (ZFP2) represses SCW formation in the cortex cells that surround the vasculature. This function is essential for efficient nutrient loading into the seeds. Notably, ZFP2 directly acts on the SCW transcription factor NAC SECONDARY WALL THICKENING PROMOTING FACTOR1 (NST1) to repress cortex cell lignification, providing a mechanism of how SCW biosynthesis is restricted to the vasculature of the funiculus to ensure proper seed loading in Arabidopsis.
| Original language | English |
|---|---|
| Pages (from-to) | 1719-1729.e6 |
| Journal | Developmental Cell |
| Volume | 60 |
| Issue number | 12 |
| DOIs | |
| State | Published - Jun 23 2025 |
Bibliographical note
Publisher Copyright:© 2025 Elsevier Inc.
Funding
We thank Dr. Hao Yu (National University of Singapore) for the seeds of N. benthamiana expressing H2B-RFP, Dr. Lisha Shen (Temasek Life Sciences Laboratory), and Dr. Chengxiang Li (Sichuan University) for suggestions on the ChIP-qPCR assay. This work was supported by the Ministry of Education (MOE) of Singapore Tier 2 (grant nos. MOE-T2EP30123-0001 and MOE-T2EP30220-0011 and to W.M.), MOE of Singapore Tier 1 (grant no. RG32/23 to W.M.), Villum Investigator (grant no. 25915 to S.P.), DNRF Chair (grant no. DNRF155 to S.P.), Novo Nordisk Laureate (grant no. NNF19OC0056076 to S.P.), Novo Nordisk Emerging Investigator (grant no. NNF20OC0060564 to S.P.), Novo Nordisk Data Science (grant no. NNF0068884 to S.P.), Independent Research Fund Denmark (grant no. 2102-00258B to D.X.), Innovation Fund Denmark (grant no. 3141-00040B to D.X.), Novo Nordisk Foundation (grant no. NNF23OC0085289 to D.X.), MOE of Singapore Tier 2 (grant no. MOE-T2EP30122-0021 to Y.M.), Singapore National Research Foundation Investigatorship (grant no. NRF-NRFI08-2022-0012 to Y.M.), and MOE of Singapore Tier 2 (grant no. MOE-T2EP30122-0017 to M.M.). L.B. is supported by the EMBO postdoctoral fellowship ALTF 37-2022 .
| Funders | Funder number |
|---|---|
| Ministry of Education China | |
| Michigan State University | |
| National University Hospital, Singapore | |
| Sichuan University, Chengdu, Sichuan | |
| MOE of Singapore | RG32/23, 25915 |
| Novo Nordisk Laureate | NNF19OC0056076 |
| Danmarks Grundforskningsfond | DNRF155 |
| Danmarks Grundforskningsfond | |
| Novo Nordisk Fonden | NNF23OC0085289, MOE-T2EP30122-0021 |
| Novo Nordisk Fonden | |
| Ministry of Education - Singapore | MOE-T2EP30123-0001, MOE-T2EP30220-0011 |
| Ministry of Education - Singapore | |
| Independent Research Fund Denmark | 2102-00258B |
| Innovationsfonden | 3141-00040B |
| Innovationsfonden | |
| Novo Nordisk A/S | NNF20OC0060564 |
| Novo Nordisk A/S | |
| European Molecular Biology Organization | ALTF 37-2022 |
| European Molecular Biology Organization | |
| National Research Foundation Singapore | NRF-NRFI08-2022-0012, MOE-T2EP30122-0017 |
| National Research Foundation Singapore | |
| Novo Nordisk Data Science | NNF0068884 |
Keywords
- Arabidopsis
- ZINC FINGER PROTEIN2
- funiculus
- secondary cell wall biosynthesis
- transcription factor
- transcriptional repression
ASJC Scopus subject areas
- Molecular Biology
- General Biochemistry, Genetics and Molecular Biology
- Developmental Biology
- Cell Biology