Acta Agriculturae Boreali-Sinica ›› 2018, Vol. 33 ›› Issue (4): 9-16. doi: 10.7668/hbnxb.2018.04.002

Special Issue: Cotton Biotechnology

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The Temporal Spatial Expression of Gibberell in Key Metabolic Enzyme in Upland Cotton

SHI Jianbin, WANG Ning, ZHOU Hong, XU Qinghua, QIAO Wenqing, YAN Gentu   

  1. Institute of Cotton Research of Chinese Academy of Agricultural Sciences, State Key Laboratory of Cotton Biology, Anyang 455000, China
  • Received:2018-04-18 Published:2018-08-28

Abstract: To reveal the relationship between the key enzyme gene expression of gibberellin synthesis pathway and different tissues or stages of growth, the CCRI49 cotton was selected as material, and relative quantification Real-time PCR was developed to determine the gibberellin key gene expression of different cotton organizations in different stages of development. The results showed that, in seedling, the expression level of all gibberellin synthesis pathway genes was higher in stem, except GA2ox1 gene. In full-blooming stage, the expression of GA2ox1, GA3ox1, GID1B in root, CPS1, GA20ox1, GA3ox1, GID1B in stem and GA3ox1 in leaf had an up-regulation. In boll opening stage, the expression levels of GA2ox1 and GA3ox1 were up-regulated in root, while the remaining genes were down-regulated. The expression levels of KS and GID1B in stem were down-regulated, while the other genes were up-regulated, with GA2ox1 rise in maximum. And GA2ox1 in the leaf was down-regulated and the rest were up-regulated. In full-blooming stage, the high expression of GA20ox1 gene provided the necessary active gibberellin level for the elongation and growth of the plant stem, and the GA3ox1 gene might be associated with flowering and bell. In boll opening stage, the expression of GA2ox1 gene in root and stem gradually increased to reduce the synthesis of active, gibberellic acid. The gene expression levels of GA3ox1 and GA20ox1 in leaf tissues were raised to provide the necessary hormone levels for cotton boll growth and dehydration. The results indicated that cotton plant by changing the key enzymes gene expression of gibberellin synthesis metabolic pathway to regulate plant growth and development, and the purpose gene expression volume trends exist a certain difference along with the growth and development. It provides a theoretical basis for studying the regulation mechanism of gibberellin on upland cotton, which can help accelerate the improvement of variety and germplasm innovation.

Key words: Cotton, Gibberellin, Gene expression, Different tissues, Growth and development

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Cite this article

SHI Jianbin, WANG Ning, ZHOU Hong, XU Qinghua, QIAO Wenqing, YAN Gentu. The Temporal Spatial Expression of Gibberell in Key Metabolic Enzyme in Upland Cotton[J]. Acta Agriculturae Boreali-Sinica, 2018, 33(4): 9-16. doi: 10.7668/hbnxb.2018.04.002.

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