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Article

The B-Type Cyclin CYCB1-1 Regulates Embryonic Development and Seed Size in Maize

by
Bingbing Zhao
1,2,
Miaoyi Zhou
2,
Wen Ren
2,
Hanshuai Li
2,
Qian Zhang
2,3,
Guangming He
4,
Ya Liu
2,* and
Haohua He
1,*
1
Key Laboratory of Crop Physiology, Ecology and Genetic Breeding Ministry of Education, College of Agronomy, Jiangxi Agricultural University, Nanchang 330046, China
2
Beijing Key Laboratory of Maize DNA Fingerprinting and Molecular Breeding, Maize Research Institute, Beijing Academy of Agriculture & Forestry Sciences, Beijing 100097, China
3
College of Life Science, Yangtze University, Jingzhou 434025, China
4
Peking-Tsinghua Center for Life Sciences, School of Life Sciences and School of Advanced Agriculture Sciences, Peking University, Beijing 100871, China
*
Authors to whom correspondence should be addressed.
Int. J. Mol. Sci. 2022, 23(11), 5907; https://doi.org/10.3390/ijms23115907
Submission received: 29 April 2022 / Revised: 20 May 2022 / Accepted: 21 May 2022 / Published: 25 May 2022
(This article belongs to the Special Issue Molecular Biology of Plant Seed Development)
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Abstract

Progress through the cell cycle is a critical process during plant embryo and seed development and its progression is regulated by cyclins. Despite extensive study of cyclins in other systems, their role in embryo and seed development of maize is unclear. In this study, we demonstrate that ZmCYCB1-1 overexpression significantly accelerated embryo growth and increased seed size. In situ hybridization and toluidine blue staining indicated that ZmCYCB1-1 was highly expressed in the plumule of embryos, and the cells of the plumule were smaller, denser, and more regularly arranged in ZmCYCB1-1 overexpression plants. Overexpression of ZmCYCB1-1 in maize also resulted in an increased ear length and enhanced kernel weight by increasing kernel width. Transcriptome analysis indicated that the overexpression of ZmCYCB1-1 affected several different metabolic pathways, including photosynthesis in embryos and leaves, and lipid metabolism in leaves. Conversely, knocking out ZmCYCB1-1 resulted in plants with slow growth. Our results suggest that ZmCYCB1-1 regulates embryo growth and seed size, making it an ideal target for efforts aimed at maize yield improvement.
Keywords: cell cycle; B-type cyclin; embryo development; seed size; maize cell cycle; B-type cyclin; embryo development; seed size; maize

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MDPI and ACS Style

Zhao, B.; Zhou, M.; Ren, W.; Li, H.; Zhang, Q.; He, G.; Liu, Y.; He, H. The B-Type Cyclin CYCB1-1 Regulates Embryonic Development and Seed Size in Maize. Int. J. Mol. Sci. 2022, 23, 5907. https://doi.org/10.3390/ijms23115907

AMA Style

Zhao B, Zhou M, Ren W, Li H, Zhang Q, He G, Liu Y, He H. The B-Type Cyclin CYCB1-1 Regulates Embryonic Development and Seed Size in Maize. International Journal of Molecular Sciences. 2022; 23(11):5907. https://doi.org/10.3390/ijms23115907

Chicago/Turabian Style

Zhao, Bingbing, Miaoyi Zhou, Wen Ren, Hanshuai Li, Qian Zhang, Guangming He, Ya Liu, and Haohua He. 2022. "The B-Type Cyclin CYCB1-1 Regulates Embryonic Development and Seed Size in Maize" International Journal of Molecular Sciences 23, no. 11: 5907. https://doi.org/10.3390/ijms23115907

APA Style

Zhao, B., Zhou, M., Ren, W., Li, H., Zhang, Q., He, G., Liu, Y., & He, H. (2022). The B-Type Cyclin CYCB1-1 Regulates Embryonic Development and Seed Size in Maize. International Journal of Molecular Sciences, 23(11), 5907. https://doi.org/10.3390/ijms23115907

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