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Yang 2015 Abphyl2.pdf (1.28 MB)

A maize glutaredoxin gene, Abphyl2, regulates shoot meristem size and phyllotaxy

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posted on 2023-05-03, 09:09 authored by Fang Yang, Huyen Thanh Bui, Michael Pautler, Victor Llaca, Robyn Johnston, Byeong-ha Lee, Allison Kolbe, Hajime Sakai, David Jackson
Phyllotaxy describes the geometric arrangement of leaves and is important for plant productivity. Auxin is well known to regulate phyllotactic patterns via PIN1-dependent auxin polar transport, and studies of Zea mays (maize) aberrant phyllotaxy 1 (abph1) mutants suggest the importance of auxin and cytokinin signaling for control of phyllotaxy. However, whether additional regulators control these patterns is poorly understood. Here, we report a new dominant maize mutant, Aberrant phyllotaxy 2 (Abph2), in which the shoot meristems are enlarged and the phyllotactic pattern switches from alternate to decussate. Map-based cloning revealed that the Abph2 mutation was caused by transposition of a glutaredoxin gene, MALE STERILE CONVERTED ANTHER1 (MSCA1), which gained an altered expression pattern in Abph2 mutant embryos. msca1 loss-of-function mutants have reduced meristem size and revealed a novel function of glutaredoxins in meristem growth. In addition, MSCA1 interacts with a TGA transcription factor, FASCIATED EAR 4 (FEA4), suggesting a novel regulatory module for regulating shoot meristem size.

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Rights statement

© 2015 American Society of Plant Biologists. All rights reserved. Open Access

Language

  • English

Does this contain Māori information or data?

  • No

Publisher

American Society of Plant Biologists

Journal title

Plant Cell

ISSN

1040-4651

Citation

Yang, F., Bui, H. T., Pautler, M., Llaca, V., Johnston, R., Lee, B. H., Kolbe, A., Sakai, H., Jackson, D. (2015). A maize glutaredoxin gene, abphyl2, regulates shoot meristem size and phyllotaxy. Plant Cell, 27(1), 121-31.

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