<abstract xmlns="http://www.w3.org/1999/xhtml"><p>To gain insights into the regulatory networks of miRNAs related to golden colour formation in <italic>Ginkgo biloba</italic> leaves, we constructed an sRNA library of golden-green striped mutant leaves. A total of 213 known miRNAs comprising 54 miRNA families were obtained, and 214 novel miRNAs were identified in the mutant leaves. We further constructed a normal green leaf sRNA library as a control and compared the expression of miRNAs between mutant and normal leaves. We found 42 known and 54 novel differential expression candidate miRNAs; 39 were up-regulated and 57 down-regulated in mutants compared to normal leaves. Our transcriptome analysis and annotation of the predicted targets indicated that the potential roles of miRNAs in <italic>G. biloba</italic> leaves included involvement in the ‘Glutathione metabolism’, ‘Plant circadian rhythm’, and ‘Phenylalanine metabolism’ categories. miRNAs and their targets were further validated by qRT-PCR. The expression of miR159a and miR159c, in particular, was significantly higher in mutant leaves than in normal leaves, while their potential target gene <italic>CLT3</italic>, which is associated with chloroplast development, displayed the opposite expression pattern. In addition, the expression of miR396g-3p and miR396h was also significantly higher in mutant leaves than in normal leaves, while the target genes <italic>ABP1</italic> (auxin-related gene) and <italic>PPR32</italic> (chloroplast RNA editing protein), respectively, showed the opposite expression pattern. Combined with the transcriptome analysis, these data suggest that miR159, miR396, and their targets may participate in chloroplast development and hormone metabolism to regulate colour formation in <italic>G. biloba</italic> leaves.</p></abstract>

To gain insights into the regulatory networks of miRNAs related to golden colour formation in Ginkgo biloba leaves, we constructed an sRNA library of golden-green striped mutant leaves. A total of 213 known miRNAs comprising 54 miRNA families were obtained, and 214 novel miRNAs were identified in the mutant leaves. We further constructed a normal green leaf sRNA library as a control and compared the expression of miRNAs between mutant and normal leaves. We found 42 known and 54 novel differential expression candidate miRNAs; 39 were up-regulated and 57 down-regulated in mutants compared to normal leaves. Our transcriptome analysis and annotation of the predicted targets indicated that the potential roles of miRNAs in G. biloba leaves included involvement in the ‘Glutathione metabolism’, ‘Plant circadian rhythm’, and ‘Phenylalanine metabolism’ categories. miRNAs and their targets were further validated by qRT-PCR. The expression of miR159a and miR159c, in particular, was significantly higher in mutant leaves than in normal leaves, while their potential target gene CLT3, which is associated with chloroplast development, displayed the opposite expression pattern. In addition, the expression of miR396g-3p and miR396h was also significantly higher in mutant leaves than in normal leaves, while the target genes ABP1 (auxin-related gene) and PPR32 (chloroplast RNA editing protein), respectively, showed the opposite expression pattern. Combined with the transcriptome analysis, these data suggest that miR159, miR396, and their targets may participate in chloroplast development and hormone metabolism to regulate colour formation in G. biloba leaves.

Construction and analysis of a library of miRNA in gold-coloured mutant leaves of <italic>Ginkgo biloba</italic> L.

College of Horticulture and Plant Protection

Folia Horticulturae

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Construction and analysis of a library of miRNA in gold-coloured mutant leaves of  L.

To gain insights into the regulatory networks of miRNAs related to golden colour formation in Ginkgo biloba leaves, we constructed an sRNA library of...

Construction and analysis of a library of miRNA in gold-coloured mutant leaves of Ginkgo biloba L.

Publié en ligne: 30 juin 2019

Pages: 81 - 92

Reçu: 02 août 2018

Accepté: 20 nov. 2018

DOI: https://doi.org/10.2478/fhort-2019-0005

Mots clés
chloroplast development, leaf coloration, leaf yellowing, microRNAs

© 2019 Weixing Li et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Construction and analysis of a library of miRNA in gold-coloured mutant leaves of Ginkgo biloba L.

Publié en ligne: 30 juin 2019

Pages: 81 - 92

Reçu: 02 août 2018

Accepté: 20 nov. 2018

DOI: https://doi.org/10.2478/fhort-2019-0005

Mots cléschloroplast development, leaf coloration, leaf yellowing, microRNAs

© 2019 Weixing Li et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Mots clés
chloroplast development, leaf coloration, leaf yellowing, microRNAs