|本期目录/Table of Contents|

[1]冯俊俊,贾明敏,黄晓倩,等.泥炭沉积磷脂脂肪酸（PLFAs）对温度的响应 [J].武汉工程大学学报,2026,48(02):177-185.[doi:10.19843/j.cnki.CN42-1779/TQ.202404018]
　FENG Junjun,JIA Mingmin,HUANG Xiaoqian,et al. Response of phospholipid fatty acids (PLFAs) in peat deposit to temperature variations [J].Journal of Wuhan Institute of Technology,2026,48(02):177-185.[doi:10.19843/j.cnki.CN42-1779/TQ.202404018]
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泥炭沉积磷脂脂肪酸（PLFAs）对温度的响应
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
48
期数:
2026年02期
页码:
177-185
栏目:
现代大化工
出版日期:
2026-04-30

文章信息/Info

Title:
Response of phospholipid fatty acids (PLFAs) in peat deposit to temperature variations
文章编号:
1674 - 2869（2026）02 - 0177 - 09
作者:
冯俊俊; 贾明敏; 黄晓倩; 谭 严; 黄雨泽; 冯雪晴; 薛建涛*
武汉工程大学环境生态与生物工程学院，长江中游生源要素微生物转化与调控湖北省重点实验室，湖北 武汉 430205
Author(s):
School of Environmental Ecology and Biological Engineering, Hubei Key Laboratory of Microbial Transformation and Regulation of Biogenic Elements in the Middle Reaches of the Yangtze River，Wuhan Institute of Technology, Wuhan 430205, China
关键词:
磷脂脂肪酸; 环境因子; 微生物量; 微生物群落结构
Keywords:
phospholipid fatty acids;  environmental factors;  microbial biomass;  microbial community structure
分类号:
Q939.9；X16
DOI:
10.19843/j.cnki.CN42-1779/TQ.202404018
文献标志码:
A
摘要:
近年来，极端干旱事件频发，威胁陆地生态系统尤其是泥炭生态系统的碳汇功能。极端干旱发生过程中温度是最主要的控制因素，温度升高会导致湿地泥炭功能失衡，进而影响泥炭土壤微生物群落结构，但对微生物的干旱胁迫缺乏足够的了解。对神农架大九湖泥炭土壤开展不同温度梯度的培养实验，研究了5、15、25、35 ℃下泥炭土壤微生物磷脂脂肪酸（PLFAs）变化特征，同时讨论了各类环境因子与PLFAs的相关关系。结果显示在不同温度培养下的泥炭土壤样品中放线菌（54.66~162.97 nmol/g）、革兰氏阳性菌（35.49~206.19 nmol/g）、革兰氏阴性菌（51.73~513.87 nmol/g）的PLFAs含量变化范围较大。在不同的培养温度下，革兰氏阴性菌是优势菌群，且其含量与温度呈正相关关系。在25 ℃下，PLFAs的总含量随着培养时间的增加呈下降趋势，而15 ℃下PLFAs的总含量随着培养时间的增加呈上升趋势，25 ℃下的PLFAs的总含量高于5、15、35 ℃下的PLFAs的总含量，表明25 ℃是泥炭沉积微生物生长的最适温度。冗余分析发现总有机碳（TOC）与各类PLFAs含量都有显著负相关性，说明TOC变化特征是控制泥炭不同温度下PLFAs分布的主要因素。综上，温度调控泥炭微生物生物量和群落结构的变化，对深入认识长江中游泥炭湿地土壤碳循环过程及其对全球气候变化的响应提供了科学依据。
Abstract:
In recent years, frequent extreme drought events have threatened the carbon sink function of terrestrial ecosystems, particularly peatlands. Temperature is a critical controlling factor during extreme drought events, as rising temperatures can disrupt the functional balance of wetland peat and subsequently alter the microbial community structure. However, our understanding of microbial responses to drought stress remains limited. In this study, incubation experiments were conducted on peat soil collected from Dajiu Lake in Shennongjia at different temperature gradients (5, 15, 25, and 35 ℃).?The variation characteristics of microbial phospholipid fatty acids (PLFAs) in peat soil were investigated, along with the correlations between various environmental factors and PLFAs.?Results showed that the PLFA contents of Actinobacteria (54.66-162.97 nmol/g), gram-positive bacteria (35.49-206.19 nmol/g), and gram-negative bacteria (51.73-513.87 nmol/g) in peat soil samples varied considerably across different incubation temperatures. Gram-negative bacteria were the dominant microbial group at all incubation temperatures and exhibited a positive correlation with temperature. At 25 ℃, the total PLFA content decreased with increasing incubation time, whereas at 15 ℃, it increased over time. The highest total PLFA content was observed at 25 ℃ compared to 5, 15, and 35 ℃, indicating that 25 ℃ is the optimal temperature for microbial growth in peat sediments. Redundancy analysis revealed significant negative correlations between total organic carbon (TOC) and all PLFA types, suggesting that variations in TOC characteristics are the primary factor controlling the distribution of PLFAs in peat under different temperature conditions. Overall, temperature regulates changes in microbial biomass and community structure in peatlands. These findings provide a scientific basis for understanding soil carbon cycling processes in peat wetlands of the middle reaches of the Yangtze River and their responses to global climate change.

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备注/Memo

备注/Memo:
收稿日期： 2024-04-11
基金项目：国家自然科学基金（41903066）；流域关键带演化湖北省重点实验室开放基金（CZE2022F05）；生物地质与环境地质国家重点实验室基金（GBL202402）
作者简介：冯俊俊，硕士研究生。Email：fjunjun163@163.com
*通信作者：薛建涛，博士，副教授。Email：xuejiantaocug@163.com
更新日期/Last Update: 2026-05-07