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TAC4 controls tiller angle by regulating the endogenous auxin content and distribution in rice.

ABSTRACT: Tiller angle, an important component of plant architecture, greatly influences the grain yield of rice (Oryza sativa L.). Here, we identified Tiller Angle Control 4 (TAC4) as a novel regulator of rice tiller angle. TAC4 encodes a plant-specific, highly conserved nuclear protein. The loss of TAC4 function leads to a significant increase in the tiller angle. TAC4 can regulate rice shoot gravitropism by increasing the indole acetic acid content and affecting the auxin distribution. A sequence analysis revealed that TAC4 has undergone a bottleneck and become fixed in indica cultivars during domestication and improvement. Our findings facilitate an increased understanding of the regulatory mechanisms of tiller angle and also provide a potential gene resource for the improvement of rice plant architecture.

SUBMITTER: Li H

PROVIDER: S-EPMC7769243 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

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TAC4 controls tiller angle by regulating the endogenous auxin content and distribution in rice.

Li Hua H Sun Hongying H Jiang Jiahuang J Sun Xianyou X Tan Lubin L Sun Chuanqing C

Plant biotechnology journal 20200720 1

Tiller angle, an important component of plant architecture, greatly influences the grain yield of rice (Oryza sativa L.). Here, we identified Tiller Angle Control 4 (TAC4) as a novel regulator of rice tiller angle. TAC4 encodes a plant-specific, highly conserved nuclear protein. The loss of TAC4 function leads to a significant increase in the tiller angle. TAC4 can regulate rice shoot gravitropism by increasing the indole acetic acid content and affecting the auxin distribution. A sequence analy ...[more]

PMID: 32628357

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BTA1 controls tiller angle and shoot gravitropism by regulating auxin transport and signaling in rice

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BTA1 controls tiller angle and shoot gravitropism by regulating auxin transport and signaling in rice

Project description:BTA1 controls tiller angle and shoot gravitropism by regulating auxin transport and signaling in rice

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