Raw data from Chemical Composition of Leaf Biomass in Asparagaceae Species

These datasets were produced as part of a research study on the chemical composition and anatomical structure of leaf biomass from seven Asparagaceae species. The data include quantitative measurements of total extractives and lignocellulosic fractions (cellulose, hemicelluloses, and lignin), as well as Fourier-transform infrared (FTIR) spectra of purified lignin and cellulose. Leaves were collected from mature plants, air-dried, and milled prior to analysis. Total extractives were determined by sequential Soxhlet extraction with organic solvents. The extractive-free material was subsequently used for lignocellulosic fractionation following standard analytical protocols. Klason lignin and purified cellulose fractions were isolated for spectroscopic analysis. FTIR spectra were acquired using an Agilent Cary 630 FTIR spectrometer. Lignin spectra were recorded in the 800–1800 cm⁻¹ region, while cellulose spectra were obtained in the 4000–650 cm⁻¹ range, with 30 scans at 4 cm⁻¹ resolution. Spectra were baseline-corrected and averaged prior to analysis. Band intensity ratios were used to estimate the syringyl/guaiacyl (S/G) ratio of lignin and the total crystallinity index (TCI) of cellulose.本数据集源自一项针对7种天门冬科（Asparagaceae）物种叶片生物质的化学组成与解剖结构的研究。数据包含总抽出物及木质纤维素组分（纤维素、半纤维素与木质素）的定量测定结果，以及纯化木质素与纤维素的傅里叶变换红外（Fourier-transform infrared, FTIR）光谱。 实验所用叶片采集自成熟植株，经风干、粉碎后开展后续分析。总抽出物含量通过有机溶剂索氏连续提取法测定。脱除抽出物的原料随后依照标准分析流程开展木质纤维素组分分离，并分离得到克劳斯木质素（Klason lignin）与纯化纤维素组分，用于后续光谱学分析。 FTIR光谱采集采用安捷伦Cary 630 FTIR光谱仪。木质素光谱的采集波段为800–1800 cm⁻¹，纤维素光谱的采集波段为4000–650 cm⁻¹，测试分辨率设为4 cm⁻¹，累计扫描30次。光谱经基线校正与均值化处理后用于后续分析。通过谱带强度比值分别估算木质素的紫丁香基/愈创木基（syringyl/guaiacyl, S/G）比值，以及纤维素的总结晶度指数（total crystallinity index, TCI）。