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首页> 外文期刊>The Plant Journal >The genome sequence of Hirschfeldia incana, a new Brassicaceae model to improve photosynthetic light-use efficiency
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The genome sequence of Hirschfeldia incana, a new Brassicaceae model to improve photosynthetic light-use efficiency

机译：Hirschfeldia incana的基因组序列，一种新的十字花科模型，以提高光合光利用效率

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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.
机译：光合作用是维持的关键过程植物和人类的生活。农业作物的光合能力一个有吸引力的手段提高产量。而光合作用的核心机制高度保守的颈- 3植物,这些机制是很灵活的,允许相当大的吗多样性的光合特性。这种多样性的维护是高光合灯用效率高辐照度的一小部分特殊物种供给。十字花科家族的成员,是这样的特殊的物种,因为它很容易成长,这是一个优秀的模型研究这一特性的遗传和生理基础。在这里,我们提出一个参考基因组的h . incana并确认其较高的光合灯用效率。光合作用的发现到目前为止十字花科,light-saturated同化芸苔属植物拉伯和密切相关芸苔属植物黑质也很高。基因组广泛多样化的通过大型染色体b·拉伯和b质重组,特有的转座子活动和微分保留复制的基因。b·拉伯和b质参与光合作用和/或光显示积极的拷贝数和基因之间的相关性表达式,提供通向的机制潜在的光合效率高这些物种。incana基因组作为一种宝贵的资源研究高光合作用的进化灯用,提高光合效率在作物物种。

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