ArticleThe Plant cell2022
ABA-induced phosphorylation of basic leucine zipper 29, ABSCISIC ACID INSENSITIVE 19, and Opaque2 by SnRK2.2 enhances gene transactivation for endosperm filling in maize.
Article in The Plant cell, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.
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25 citing papers in PubMed, 50 citations in OpenAlex.
- SnRK2.6 phosphorylates sucrose transporter ZmSUT1 to enhance yield by modulating leaf senescence in maize.Science advances · 2026Article
- Subclass III SnRK2 Kinases Coordinate Starch and Storage Protein Synthesis During Maize Kernel Development.Plant biotechnology journal · 2026Article
- ZmMYB127 controls maize endosperm filling via dual-transcriptional regulation to improve grain yield and quality.Nature plants · 2026Article
- From development to yield: genetic and molecular regulation of agronomic traits in maize seeds.Frontiers in plant science · 2026Review
- SmbZIP5 Integrates Abscisic and Jasmonic Acid Signalling to Positively Regulate Tanshinone Biosynthesis in Salvia miltiorrhiza.Plant biotechnology journal · 2025Article
- Decades' progress and prospects on maize functional genomics and molecular breeding.Science China. Life sciences · 2025Review
- Identification and utilization of a novel large-effect QTL and linked markers for enhancing protein concentration in peanut.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2025Article
- Map-based cloning of ZmSS5, construction and validation of its regulatory pathway for maize kernel weight.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2025Article
- Maize leaf yellowing gene ZmCAAX modulates growth and drought resistance by regulating abscisic acid contents through interaction with the ABA biosynthetic enzyme ZmNCED3.Plant biotechnology journal · 2025Article
- A large-scale gene regulatory network for rice endosperm starch biosynthesis and its application in genetic improvement of rice quality.Plant biotechnology journal · 2025Article
- Genome-Wide Dissection of Sorghum B3 Transcription Factor Family Identifies SbLAV1 as a Critical Transcriptional Regulator of Starch Biosynthesis in Developing Sorghum Grains.Plants (Basel, Switzerland) · 2025Article
- GWAS-based population genetic analysis identifies bZIP29 as a heterotic gene in maize.Plant communications · 2025Article
- ABA importers ABCG17 and ABCG18 redundantly regulate seed size in Arabidopsis.The Plant journal : for cell and molecular biology · 2025Article
- Integrated metabolomic and transcriptomic analyses reveal that starch and sucrose metabolism regulate maize kernel hardness.Frontiers in plant science · 2025Article
- Differential ABA sensitivity of superior and inferior rice grains is linked to cell cycle entry into endoreduplication.Frontiers in plant science · 2025Article
- Progress of ABA function in endosperm cellularization and storage product accumulation.Plant cell reports · 2024Review
- bZIP Transcription Factors: Structure, Modification, Abiotic Stress Responses and Application in Plant Improvement.Plants (Basel, Switzerland) · 2024Review
- Central Roles of ZmNAC128 and ZmNAC130 in Nutrient Uptake and Storage during Maize Grain Filling.Genes · 2024Article
- Transcriptional Control of Seed Life: New Insights into the Role of the NAC Family.International journal of molecular sciences · 2024Review
- ZmELP1, an Elongator complex subunit, is required for the maintenance of histone acetylation and RNA Pol II phosphorylation in maize kernels.Plant biotechnology journal · 2024Article
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10 authors at 2 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Opaque2 (O2) functions as a central regulator of the synthesis of starch and storage proteins and the O2 gene is transcriptionally regulated by a hub coordinator of seed development and grain filling, ABSCISIC ACID INSENSITIVE 19 (ZmABI19), in maize (Zea mays). Here, we identified a second hub coordinator, basic Leucine Zipper 29 (ZmbZIP29) that interacts with ZmABI19 to regulate O2 expression. Like zmabi19, zmbzip29 mutations resulted in a dramatic decrease of transcript and protein levels of O2 and thus a significant reduction of starch and storage proteins. zmbzip29 seeds developed slower and had a smaller size at maturity than those of the wild type. The zmbzip29;zmabi19 double mutant displayed more severe seed phenotypes and a greater reduction of storage reserves compared to the single mutants, whereas overexpression of the two transcription factors enhanced O2 expression, storage-reserve accumulation, and kernel weight. ZmbZIP29, ZmABI19, and O2 expression was induced by abscisic acid (ABA). With ABA treatment, ZmbZIP29 and ZmABI19 synergistically transactivated the O2 promoter. Through liquid chromatography tandem-mass spectrometry analysis, we established that the residues threonine(T) 57 in ZmABI19, T75 in ZmbZIP29, and T387 in O2 were phosphorylated, and that SnRK2.2 was responsible for the phosphorylation. The ABA-induced phosphorylation at these sites was essential for maximum transactivation of downstream target genes for endosperm filling in maize.
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