在Populus叶中揭示了可变的素结构
Nathan Bryant1, Nancy Engle2, Timothy Tschaplinski2
1Department of Chemical and Biomolecular Engineering, University of Tennessee Knoxville Tennessee 37996 USA.
RSC advances
|July 7, 2023
概括
树叶中的叶状素显示出显著的结构变异性,特别是在干旱压力之外的syringyl/guaiacyl比率. 这项研究揭示了树叶木质素组成的新见解.
科学领域:
- 植物生物学 植物生物学
- 生物化学 生物化学
- 生物质科学 生物质科学
背景情况:
- 红素对于生物能源原料如Populus至关重要,但叶状红素与茎状红素相比仍未得到充分研究.
- 了解树叶的木质素变异性对于优化生物质利用至关重要.
研究的目的:
- 研究不同基因型和灌处理的Populus trichocarpa树叶中的素的结构多样性.
- 为了识别树叶红素的关键结构特征及其变异性.
主要方法:
- 使用高灵敏度定量 (HSQC) 核磁共振 (NMR),富里埃转换红外光谱 (FTIR) 和气色谱-质谱 (GC-MS) 分析了11种Populus trichocarpa基因型.
- 干旱应激处理对一组基因型的应用,以评估其对红素结构的影响.
- 统计分析,包括主要成分分析 (PCA),以将光谱数据与素成分相关联.
主要成果:
- 观察到高度可变的素结构,注射/瓜亚 (S/G) 比率从0.52到11.9不等.
- 存在可观的缩的syringyl lignin结构,它们的水平在不同的灌处理中是一致的,这表明它们不是压力诱导的.
- 与注射剂单位相关的FTIR吸收率显著促进了样本变异性,并且与NMR衍生的S / G比率相对相关.
- GC-MS分析显示了二次代谢物的变异性,沙利衍生物与NMR发现有很好的相关性.
结论:
- 松树叶表现出显著且以前未被探索的木质素结构变异性,特别是在S/G比率和凝结的注射器结构中.
- 叶中的素成分似乎取决于基因型,而不是对短期干旱压力的直接反应.
- 这些发现提供了对叶组织组成的更深入的了解,这与生物质原料开发和遗传改进有关.
相关概念视频
01:15Cellulose and Pectic Polysaccharides
3.7K
Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth. Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
As a cell matures, its cell wall specializes according to its type. For example, the...
As a cell matures, its cell wall specializes according to its type. For example, the...
3.7K
02:43Plant Cell Wall
56.9K
The plant cell wall gives plant cells shape, support, and protection. As a cell matures, its cell wall specializes according to the cell type. For example, the parenchyma cells of leaves possess only a thin, primary cell wall.
56.9K
01:21Wood Products
109
Wood products encompass a broad range of materials crafted from wood strands, veneers, lumber, and even waste wood-like shreds, designed for both structural and nonstructural purposes. Various specialized wood products have been developed to enhance strength, durability, and versatility in building applications.
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
109
01:28Softwoods and Hardwoods
195
Softwoods and hardwoods, derived from different types of trees, are distinguished by their leaf structures and cellular compositions, each serving unique purposes in construction and manufacturing. Softwoods come from cone-bearing trees with needle-like leaves and are predominantly composed of longitudinal cells called tracheids and a smaller proportion of radial cells known as rays. Due to their cellular structure, softwoods are commonly used in construction for structural frames, sheathing,...
195
03:25Chemistry of Carbohydrates
73.5K
Carbohydrates are an essential part of the diet in humans and animals. Grains, fruits, and vegetables are natural sources of carbohydrates that provide energy to the body, particularly through glucose, a simple sugar that is a component of starch and an ingredient in many staple foods. The stoichiometric formula (CH2O)n, where n is the number of carbons in the molecule represents carbohydrates. In other words, the ratio of carbon to hydrogen to oxygen is 1:2:1 in carbohydrate molecules. This...
73.5K