期刊
PLANT JOURNAL
卷 112, 期 5, 页码 1298-1315出版社
WILEY
DOI: 10.1111/tpj.16005
关键词
photosynthesis; Brassicaceae; Hirschfeldia incana; model species; high light-use efficiency; high-production agriculture; copy number variation
资金
- Netherlands Organisation of Scientific Research (NWO) [ALWGR.2015.9]
- EU-Horizon2020 Research and Innovation project CropBooster-P [817690]
- EU-Horizon2020 Research and Innovation project CAPITALISE [862201]
- NWO
- Rijk Zwaan Breeding
- Bejo Zaden
- Genetwister Technologies
- Averis Seeds
- C. Meijer
- HZPC Holland
Photosynthesis is a crucial process for plant and human survival. The exceptional species Hirschfeldia incana has high photosynthetic light-use efficiency, which is also observed in closely related species Brassica rapa and Brassica nigra. The genome of H. incana has undergone extensive diversification compared to B. rapa and B. nigra, resulting in large chromosomal rearrangements, species-specific transposon activity, and differential retention of duplicated genes. Duplicated genes involved in photosynthesis and photoprotection show a positive correlation between copy number and gene expression. This research provides valuable insights into the evolution of high photosynthetic light-use efficiency and has implications for enhancing the photosynthetic rates in crop species.
Photosynthesis is a key process in sustaining plant and human life. Improving the photosynthetic capacity of agricultural crops is an attractive means to increase their yields. While the core mechanisms of photosynthesis are highly conserved in C-3 plants, these mechanisms are very flexible, allowing considerable diversity in photosynthetic properties. Among this diversity is the maintenance of high photosynthetic light-use efficiency at high irradiance as identified in a small number of exceptional C-3 species. Hirschfeldia incana, a member of the Brassicaceae family, is such an exceptional species, and because it is easy to grow, it is an excellent model for studying the genetic and physiological basis of this trait. Here, we present a reference genome of H. incana and confirm its high photosynthetic light-use efficiency. While H. incana has the highest photosynthetic rates found so far in the Brassicaceae, the light-saturated assimilation rates of closely related Brassica rapa and Brassica nigra are also high. The H. incana genome has extensively diversified from that of B. rapa and B. nigra through large chromosomal rearrangements, species-specific transposon activity, and differential retention of duplicated genes. Duplicated genes in H. incana, B. rapa, and B. nigra that are involved in photosynthesis and/or photoprotection show a positive correlation between copy number and gene expression, providing leads into the mechanisms underlying the high photosynthetic efficiency of these species. Our work demonstrates that the H. incana genome serves as a valuable resource for studying the evolution of high photosynthetic light-use efficiency and enhancing photosynthetic rates in crop species.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据