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Volume 23
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10.3390/ijms23021008
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Article

Biochemical and Expression Analyses Revealed the Involvement of Proanthocyanidins and/or Their Derivatives in Fiber Pigmentation of Gossypium stocksii

by
Yujie Sun
,
Diandian Zhang
,
Hongli Zheng
,
Yuqing Wu
,
Jun Mei
,
Liping Ke
,
Dongliang Yu
* and
Yuqiang Sun
*
Plant Genomics & Molecular Improvement of Colored Fiber Laboratory, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou 310018, China
*
Authors to whom correspondence should be addressed.
Int. J. Mol. Sci. 2022, 23(2), 1008; https://doi.org/10.3390/ijms23021008
Submission received: 12 December 2021 / Revised: 6 January 2022 / Accepted: 11 January 2022 / Published: 17 January 2022
(This article belongs to the Topic Plant Functional Genomics and Crop Genetic Improvement)
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Abstract

The wild cotton species Gossypium stocksii produces a brown fiber that provides a valuable resource for the color improvement of naturally colored cotton (NCC) fiber. However, the biochemical basis and molecular mechanism of its fiber pigmentation remain unclear. Herein, we analyzed the dynamics of proanthocyanidins (PAs) accumulation in developing the fiber of G. stocksii, which suggested a similar role of PAs and/or their derivatives in the fiber coloration of G. stocksii. In addition, comparative transcriptomics analyses revealed that the PA biosynthetic genes were expressed at higher levels and for a longer period in developing fibers of G. stocksii than G. arboreum (white fiber), and the transcription factors, such as TT8, possibly played crucial regulatory roles in regulating the PA branch genes. Moreover, we found that the anthocyanidin reductase (ANR) was expressed at a higher level than the leucoanthocyanidin reductases (LARs) and significantly upregulated during fiber elongation, suggesting a major role of ANR in PA synthesis in G. stocksii fiber. In summary, this work revealed the accumulation of PAs and the expression enhancement of PA biosynthetic genes in developing fibers of G. stocksii. We believe this work will help our understanding of the molecular mechanisms of cotton fiber coloration and further promote the future breeding of novel NCCs.
Keywords: wild cotton; brown fiber; proanthocyanidin; TT8; ANR wild cotton; brown fiber; proanthocyanidin; TT8; ANR

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MDPI and ACS Style

Sun, Y.; Zhang, D.; Zheng, H.; Wu, Y.; Mei, J.; Ke, L.; Yu, D.; Sun, Y. Biochemical and Expression Analyses Revealed the Involvement of Proanthocyanidins and/or Their Derivatives in Fiber Pigmentation of Gossypium stocksii. Int. J. Mol. Sci. 2022, 23, 1008. https://doi.org/10.3390/ijms23021008

AMA Style

Sun Y, Zhang D, Zheng H, Wu Y, Mei J, Ke L, Yu D, Sun Y. Biochemical and Expression Analyses Revealed the Involvement of Proanthocyanidins and/or Their Derivatives in Fiber Pigmentation of Gossypium stocksii. International Journal of Molecular Sciences. 2022; 23(2):1008. https://doi.org/10.3390/ijms23021008

Chicago/Turabian Style

Sun, Yujie, Diandian Zhang, Hongli Zheng, Yuqing Wu, Jun Mei, Liping Ke, Dongliang Yu, and Yuqiang Sun. 2022. "Biochemical and Expression Analyses Revealed the Involvement of Proanthocyanidins and/or Their Derivatives in Fiber Pigmentation of Gossypium stocksii" International Journal of Molecular Sciences 23, no. 2: 1008. https://doi.org/10.3390/ijms23021008

APA Style

Sun, Y., Zhang, D., Zheng, H., Wu, Y., Mei, J., Ke, L., Yu, D., & Sun, Y. (2022). Biochemical and Expression Analyses Revealed the Involvement of Proanthocyanidins and/or Their Derivatives in Fiber Pigmentation of Gossypium stocksii. International Journal of Molecular Sciences, 23(2), 1008. https://doi.org/10.3390/ijms23021008

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