Leaf Size Development Differences and Comparative Trancriptome Analyses of Two Poplar Genotypes
The plant leaf, the main organ of photosynthesis, is an important regulator of growth. To explore the difference between leaf size of <i>Populus</i><i>deltoides</i> ‘Danhong’ (Pd) and <i>P</i><i>opulus simonii</i> ‘Tongliao1’ (Ps), we investigated the...
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| Autores principales: | , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/61c8029743c34d06a32ae72ed5672263 |
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| Sumario: | The plant leaf, the main organ of photosynthesis, is an important regulator of growth. To explore the difference between leaf size of <i>Populus</i><i>deltoides</i> ‘Danhong’ (Pd) and <i>P</i><i>opulus simonii</i> ‘Tongliao1’ (Ps), we investigated the leaf length, leaf width, leaf thickness, leaf area, leaf mass per area (LMA), and cell size of leaves from two genotypes and profiled the transcriptome-wide gene expression patterns through RNA sequencing. Our results show that the leaf area of Pd was significantly larger than that of Ps, but the epidermal cell area was significantly smaller than that of Ps. The difference of leaf size was caused by cell numbers. Transcriptome analysis also revealed that genes related to chromosome replication and DNA repair were highly expressed in Pd, while genes such as the <i>EXPANSIN</i> (<i>EXPA</i>) family which promoted cell expansion were highly expressed in Ps. Further, we revealed that the growth-regulating factors (<i>GRFs</i>) played a key role in the difference of leaf size between two genotypes through regulation of cell proliferation. These data provide a valuable resource for understanding the leaf development of the <i>Populus</i> genus. |
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