| 摘要: |
| 为了解紫芋 Colocasia sp. 中主要的营养成分, 以紫芋地下球茎为供试材料, 采用凯氏定氮法、
茚三酮柱后衍生离子交换色谱法、 苯酚-硫酸分光光度法和微波消解-电感耦合等离子质谱法 (ICP-MS)
进行测定。 基于 ITS 序列通过 Iqtree 软件构建系统发育树, 将其鉴定为 Colocasia sp. YN。 结果表明, 紫芋
块茎中蛋白质含量为 1. 98 g·100 g
-1
, 粗多糖含量为 3. 47 g·100 g
-1
, 氨基酸总量为 0. 914 g·100 g
-1
,
必需氨基酸占氨基酸总含量的 35. 34%, 以鲜甜味氨基酸为主, 其氨基酸含量和组成符合 FAO / WHO 标
准。 在测定的 28 种元素中, 钾 ( K) 的含量最高, 为 4. 370 × 10
3 mg ·kg
-1
, 其次是镁 ( Mg) 和钙
(Ca), 分别为 2. 717×10
2 mg·kg
-1 和 2. 030×10
2 mg·kg
-1
; 其中重金属元素的含量均低于 《食品安全国
家标准 食品中污染物限量》 (GB 2762-2022) 的规定。 |
| 关键词: 紫芋 系统发育 FAO / WHO 模式 营养成分 |
| DOI： |
| 分类号: |
| 基金项目:广东省林业科技创新项目 (2021KJCX002), 国家现代农业产业技术体系项目 (CARS-21), 教育部产学合作协同育人项 目 (202102195004)。 |
|
| Nutritional Analysis of Colocasia sp. |
|
XIONG Jiahui1, ZHANG Cheng1, QIU Sirun1, FENG Ying2, CAI Guihua3, SHAN Tijiang1
|
|
1.Guangdong Key Laboratory for lnnovative Development and Utilization of Forest Plant Germplasm/College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou Guangdong;2.Guangdong Forest Resources Conservation Center,Guangzhou Guangdong;3.Hezhou Academy of Agricultural Sciences,Hezhou Guangxi Zhuang Autonomous Region
|
| Abstract: |
| To analyze the major nutritional components of Colocasia sp. , the underground tubers of Colocasia sp. were used as the test material. The Kjeldahl method, orcinol post-column derivatization ion exchange
chromatography, phenol-sulfuric acid spectrophotometry, and microwave digestion-inductively coupled plasma
mass spectrometry (ICP-MS) were employed for the measurements. Based on ITS sequences, a phylogenetic
tree was constructed using the Iqtree software, confirming the species as Colocasia sp. . The results showed that
the protein content in the Colocasia sp. tuber was 1. 98 g·100 g
-1
, crude polysaccharide content was 3. 47 g·
100 g
-1
, total amino acids reached to 0. 914 g·100 g
-1
, with essential amino acids accounting for 35. 34% of
the total amino acid content, predominantly comprising sweet-tasting amino acids. The amino acid content and composition meet the FAO / WHO standards. Among the 28 elements measured, potassium (K) had the highest
content (4. 370×10
2 mg·kg
-1
), followed by magnesium (Mg) and calcium (Ca), with concentrations of
2. 717×10
2
and 2. 03×10
2 mg·kg
-1
. The concentrations of heavy metals were all below the limits specified in
the National Food Safety Standard-Maximum Levels of Contaminants in Food (GB 2762-2022). |
| Key words: Colocasia sp. phylogenetic FAO / WHO model nutritional component |
