<i>Liguleless narrow</i> and <i>narrow odd dwarf</i> act in overlapping pathways to regulate maize development and metabolism

Abraham-Juárez, María Jazmín; Busche, Michael; Anderson, Alyssa A.; Lunde, China; Winders, Jeremy; Christensen, Shawn A.; Hunter, Charles T.; Hake, Sarah; Brunkard, Jacob O.

doi:10.1111/tpj.15988

Cited by 3 publications

(1 citation statement)

References 87 publications

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“…Abraham‐Juárez made the next breakthrough in this story while using co‐immunoprecipitation to discover direct interactions with the NOD protein, finding to everyone's surprise that LGN can interact directly with NOD Abraham‐Juárez et al. (2022). Since LGN is a receptor‐like kinase, the team assessed whether it can phosphorylate NOD, which it can.…”

Section: Figurementioning

confidence: 99%

Stress management: how NOD and LGN coordinate growth–defence tradeoffs in maize

Pierroz¹

2022

The Plant Journal

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Section: Figurementioning

confidence: 99%

Stress management: how NOD and LGN coordinate growth–defence tradeoffs in maize

Pierroz¹

2022

The Plant Journal

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Terminal ear 1 and phytochromes B1/B2 regulate maize leaf initiation independently

2022

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Higher plants generate new leaves from shoot meristems throughout their vegetative lifespan. The tempo of leaf initiation is dynamically regulated by physiological cues, but little is known about the underlying genetic signaling pathways that coordinate this rate. Two maize (Zea mays) mutants, terminal ear1 (te1) and phytochrome B1; phytochrome B2 (phyB1; phyB2), oppositely affect leaf initiation rates and total leaf number at flowering time: te1 mutants make leaves faster whereas phyB1; phyB2 mutants make leaves slower than wild-type plants. To test whether PhyB1, PhyB2, and TE1 act in overlapping or distinct pathways to regulate leaf initiation, we crossed te1 and phyB1; phyB2, created an F2 population segregating for these three mutations, and quantified various phenotypes among the resulting genotypes, including leaf number, leaf initiation rate, plant height, leaf length, leaf width, number of juvenile leaves, stalk diameter, and dry shoot biomass. Leaf number and initiation rate in phyB1; phyB2; te1 plants fell between the extremes of the two parents, suggesting an additive genetic interaction between te1 and phyB1; phyB2 rather than epistasis. Therefore, we conclude that PhyB1, PhyB2, and TE1 likely control leaf initiation through distinct signaling pathways.

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Widespread changes to the translational landscape in a maize microRNA biogenesis mutant

Yang,

Thompson

2024

The Plant Journal

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SUMMARYMicroRNAs are short, non‐coding RNAs that repress gene expression in both plants and animals and have diverse functions related to growth, development, and stress responses. The ribonuclease, DICER‐LIKE1 (DCL1) is required for two steps in plant miRNA biogenesis: cleavage of the primary miRNAs (pri‐miRNAs) to release a hairpin structure, called the precursor miRNA (pre‐miRNA) and cleavage of the pre‐miRNA to generate the miRNA/miRNA* duplex. The mature miRNA guides the RNA‐induced silencing complex to target RNAs with complementary sequences, resulting in translational repression and/or RNA cleavage of target mRNAs. However, the relative contribution of translational repression versus mRNA degradation by miRNAs remains unknown at the genome‐level in crops, especially in maize. The maize fuzzy tassel (fzt) mutant contains a hypomorphic mutation in DCL1 resulting in broad developmental defects. While most miRNAs are reduced in fzt, the levels of miRNA‐targeted mRNAs are not dramatically increased, suggesting that translational regulation by miRNAs may be common. To gain insight into the repression mechanism of plant miRNAs, we combined ribosome profiling and RNA‐sequencing to globally survey miRNA activities in maize. Our data indicate that translational repression contributes significantly to regulation of most miRNA targets and that approximately one‐third of miRNA targets are regulated primarily at the translational level. Surprisingly, ribosomes appear altered in fzt mutants suggesting that DCL1 may also have a role in ribosome biogenesis. Thus, DICER‐LIKE1 shapes the translational landscape in plants through both miRNA‐dependent and miRNA‐independent mechanisms.

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Liguleless narrow and narrow odd dwarf act in overlapping pathways to regulate maize development and metabolism

Cited by 3 publications

References 87 publications

Stress management: how NOD and LGN coordinate growth–defence tradeoffs in maize

Stress management: how NOD and LGN coordinate growth–defence tradeoffs in maize

Terminal ear 1 and phytochromes B1/B2 regulate maize leaf initiation independently

Widespread changes to the translational landscape in a maize microRNA biogenesis mutant

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