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SUPER STARCHY1/ONAC025 participates in rice grain filling

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Title SUPER STARCHY1/ONAC025 participates in rice grain filling
 
Creator Mathew, Iny Elizebeth
Priyadarshini, Richa
Mahto, Arunima
Jaiswal, Priya
Parida, Swarup K.
Agarwal, Pinky
 
Subject amylopectin
grain
NAC
rice
seed development
transcription factor
 
Description Accepted date: 10 July 2020
NAC transcription factors (TFs) are known for their role in development and stress.
This article attempts to functionally validate the role of rice SS1/ ONAC025 (LOC_
Os11g31330) during seed development. The gene is seed-specific and its promoter directs reporter expression in the developing endosperm and embryo in rice transgenic
plants. Furthermore, rice transgenic plants ectopically expressing SS1/ ONAC025
have a plantlet lethal phenotype with hampered vegetative growth, but increased
tillers and an altered shoot apical meristem structure. The vegetative cells of these
plantlets are filled with distinct starch granules. RNAseq analysis of two independent plantlets reveals the differential expression of reproductive and photosynthetic
genes. A comparison with seed development transcriptome indicates differential
regulation of many seed-related genes by SS1/ ONAC025. Genes involved in starch
biosynthesis, especially amylopectin and those encoding seed storage proteins, and
regulating seed size are also differentially expressed. In conjunction, SS1/ ONAC025
shows highest expression in japonica rice. As a TF, SS1/ ONAC025 is a transcriptional
repressor localized to endoplasmic reticulum and nucleus. The article shows that
SS1/ ONAC025 is a seed-specific gene promoting grain filling in rice, and negatively
affecting vegetative growth.
The authors acknowledge the support provided by central instrumentation and microscopy facilities of NIPGR and DBT e-library
consortium for providing online access to articles.
 
Date 2020-10-05T09:54:54Z
2020-10-05T09:54:54Z
2020
 
Type Article
 
Identifier Plant Direct 4(9): e00249
2475-4455
https://doi.org/10.1002/pld3.249
https://onlinelibrary.wiley.com/doi/10.1002/pld3.249
http://223.31.159.10:8080/jspui/handle/123456789/1108
 
Language en_US
 
Format application/pdf
 
Publisher American Society of Plant Biologists