Gibberellic acid sensitive dwarf encodes an ARPC2 subunit that mediates gibberellic acid biosynthesis, effects to grain yield in rice

The plant hormone gibberellic acid (GA) is important for plant growth and productivity. Actin-related proteins (ARPs) also play central roles in plant growth, including cell elongation and development. However, the relationships between ARPs and GA signaling and biosynthesis are not fully understood...

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Published inFrontiers in plant science Vol. 13; p. 1027688
Main Authors Um, Tae Young, Hong, So Yeon, Han, Ji Sung, Jung, Ki Hong, Moon, Sunok, Choi, Beom-Soon, Basnet, Prakash, Chung, Young Soo, Lee, Seon Woo, Yang, Won Tae, Kim, Doh Hoon
Format Journal Article
LanguageEnglish
Published Switzerland Frontiers Media S.A 22.12.2022
Subjects
actin-related protein
gibberellic acid
grain yield
Oryza sativa
Plant Science
rice growth
Oryza sativa
actin-related protein
grain yield
rice growth
gibberellic acid
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Summary:The plant hormone gibberellic acid (GA) is important for plant growth and productivity. Actin-related proteins (ARPs) also play central roles in plant growth, including cell elongation and development. However, the relationships between ARPs and GA signaling and biosynthesis are not fully understood. Here, we isolated OsGASD , encoding an ARP subunit from rice ( Oryza sativa ), using the Ac/Ds knockout system. The osgasd knockout (Ko) mutation reduced GA3 content in shoots as well as plant growth and height. However, GA application restored the plant height of the osgasd Ko mutant to a height similar to that of the wild type (WT). Rice plants overexpressing OsGASD (Ox) showed increased plant height and grain yield compared to the WT. Transcriptome analysis of flag leaves of OsGASD Ox and osgasd Ko plants revealed that OsGASD regulates cell development and the expression of elongation-related genes. These observations suggest that OsGASD is involved in maintaining GA homeostasis to regulate plant development, thereby affecting rice growth and productivity.
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These authors have contributed equally to the work and share first authorship
This article was submitted to Plant Biotechnology, a section of the journal Frontiers in Plant Science
Edited by: Joydeep Banerjee, Indian Institute of Technology Kharagpur, India
Reviewed by: Qibing Lin, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, China; Jun Fang, Key Laboratory of Soybean Molecular Design and Breeding, Chinese Academy of Sciences (CAS), China
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2022.1027688