Unknown

Dataset Information

0

Abscisic acid signaling is controlled by a BRANCHED1/HD-ZIP I cascade in Arabidopsis axillary buds.


ABSTRACT: Shoot-branching patterns determine key aspects of plant life and are important targets for crop breeding. However, we are still largely ignorant of the genetic networks controlling locally the most important decision during branch development: whether the axillary bud, or branch primordium, grows out to give a lateral shoot or remains dormant. Here we show that, inside the buds, the TEOSINTE BRANCHED1, CYCLOIDEA, PCF (TCP) transcription factor BRANCHED1 (BRC1) binds to and positively regulates the transcription of three related Homeodomain leucine zipper protein (HD-ZIP)-encoding genes: HOMEOBOX PROTEIN 21 (HB21), HOMEOBOX PROTEIN 40 (HB40), and HOMEOBOX PROTEIN 53 (HB53). These three genes, together with BRC1, enhance 9-CIS-EPOXICAROTENOID DIOXIGENASE 3 (NCED3) expression, lead to abscisic acid accumulation, and trigger hormone response, thus causing suppression of bud development. This TCP/HD-ZIP genetic module seems to be conserved in dicot and monocotyledonous species to prevent branching under light-limiting conditions.

SUBMITTER: Gonzalez-Grandio E 

PROVIDER: S-EPMC5240681 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature

altmetric image

Publications

Abscisic acid signaling is controlled by a BRANCHED1/HD-ZIP I cascade in Arabidopsis axillary buds.

González-Grandío Eduardo E   Pajoro Alice A   Franco-Zorrilla José M JM   Tarancón Carlos C   Immink Richard G H RG   Cubas Pilar P  

Proceedings of the National Academy of Sciences of the United States of America 20161227 2


Shoot-branching patterns determine key aspects of plant life and are important targets for crop breeding. However, we are still largely ignorant of the genetic networks controlling locally the most important decision during branch development: whether the axillary bud, or branch primordium, grows out to give a lateral shoot or remains dormant. Here we show that, inside the buds, the TEOSINTE BRANCHED1, CYCLOIDEA, PCF (TCP) transcription factor BRANCHED1 (BRC1) binds to and positively regulates t  ...[more]

Similar Datasets

| S-EPMC525597 | biostudies-other
| S-EPMC3777161 | biostudies-literature
| S-EPMC6717914 | biostudies-literature
| S-EPMC3697942 | biostudies-literature
| S-EPMC3548853 | biostudies-other
| S-EPMC7023735 | biostudies-literature
2023-10-26 | GSE155028 | GEO
| S-EPMC4507714 | biostudies-literature
| S-EPMC7314967 | biostudies-literature
| S-EPMC8331031 | biostudies-literature