血管苗中旋转的进化:在早期过渡性菌异质植物兰花的分类中进行序列,拼接和表达
Rachel M Muti1,2, Craig F Barrett3, Brandon T Sinn1,4
1Department of Biology and Earth Science, Otterbein University, Westerville, OH, United States.
Frontiers in plant science
|July 15, 2024
概括
塑转录因子Whirly1 (WHY1) 在菌异体的兰花中显示出改变的拼接和表达. 这些变化在显著的选择转移之前发生,这表明WHY1在过渡到菌类异质变的过程中不是主要的.
科学领域:
- 植物分子进化 植物分子进化
- 菌异质变性 菌异质变性 菌异质变性
- 兰花科的基因组学
背景情况:
- Whirly1 (WHY1) 是一种塑体转录因子,对叶绿体生物发生和基因组稳定性至关重要.
- 了解WHY1进化是研究血管精子中自性损失的关键.
- 已知异质植物的基因损失,但基因组稳定性进化的分子机制尚不清楚.
研究的目的:
- 描述WHY1在早期的过渡性菌异质植物兰花 (Corallorhiza) 中的进化轨迹.
- 为了研究WHY1在转变为菌类异质变异中的作用.
- 为了提供一个全面的 WHY1 进化跨血管精子的图景.
主要方法:
- 来自21个苗种类的WHY1基因组序列的遗传学分析.
- 对四种Corallorhiza物种的转录和比较基因组分析.
- 用于选择性疗法和功能影响突变的识别的基因和编码子水平测试.
主要成果:
- 在非绿色的Corallorhiza物种中观察到非正规WHY1异型的增加,包括内部保留.
- WHY1的组织特异性差异表达发生在具有光合作用能力的Corallorhiza中,在完全菌异质的物种中出现异型变化.
- 关于WHY1的放松选择推断在晚期菌类异质 (Epipogium,Gastrodia) 中,只有在这些物种中出现无意义突变.
结论:
- 在WHY1中发生的剪接和表达变化可能会在晚期菌类异构体中之前检测到选择性转移.
- 这些发现不支持WHY1在Orchidaceae中过渡到真菌异质变性中的主要作用.
- 这项研究提供了迄今为止对血管精子中WHY1演变的最广泛的分析.
相关概念视频
Non-vascular Seedless Plants
64.4K
The diverse plant life on Earth—consisting of nearly 400,000 species—can be divided into three broad categories based on biological characteristics: nonvascular, seedless vascular, and seed plants.
64.4K
Morphogenesis
28.0K
Plant morphogenesis—the development of a plant’s form and structure—involves several overlapping developmental processes, including growth and cell differentiation. Precursor cells differentiate into specific cell types, which are organized into the tissues and organ systems that make up the functional plant.
28.0K
Eukaryotic Evolution
33.4K
The endosymbiont theory is the most widely accepted theory of eukaryotic evolution; however, its progression is still somewhat debated. According to the nucleus-first hypothesis, the ancestral prokaryote first evolved a membrane to enclose DNA and form the nucleus. Conversely, the mitochondria-first hypothesis suggests that the nucleus was formed after endosymbiosis of mitochondria.
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
33.4K
Seed Structure and Early Development of the Sporophyte
28.1K
Seed structures are composed of a protective seed coat surrounding a plant embryo, and a food store for the developing embryo. The embryo contains the precursor tissues for leaves, stem, and roots. The endosperm and cotyledons—seed leaves—act as the food reserves for the growing embryo.
28.1K
Evolutionary Relationships through Genome Comparisons
5.7K
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
5.7K
The Angiosperm Life Cycle
65.0K
Plants have a life cycle split between two multicellular stages: a haploid stage—with cells containing one set of chromosomes—and a diploid stage—with cells containing two sets of chromosomes. The haploid stage is the gamete-producing gametophyte, and the diploid stage is the spore-producing sporophyte.
65.0K


