高结晶度聚乳酸降解对堆肥中真菌群落结构的影响

IF 2 4区 农林科学 Q3 ECOLOGY
Mehlika Karamanlioglu, Ü. Alkan
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引用次数: 5

摘要

摘要聚乳酸(PLA)是一种可堆肥塑料,其降解率受其物理性能和环境条件的影响。由于不同物理性质的聚乳酸进入堆肥系统,研究不同温度下强物理性质聚乳酸在堆肥中的降解及其对堆肥真菌群落结构的影响是本研究的主要关注点。为了确定缓慢降解PLA对真菌群落的影响,将结晶度为60%的PLA颗粒在25℃的堆肥中孵育 °C和50 °C 4 0、10、25和50%(w/w)浓度下的月份;比较了它们的降解率,并通过末端限制性片段长度多态性(TRFLP)检测了PLA降解对堆肥真菌群落的影响。25℃堆肥中的PLA颗粒 °C没有物理变化,但在50 4℃后发生物理崩解 月。TRFLP显示堆肥中的真菌群落分布受到PLA的影响,尤其是在50 °C,PLA降解。在PLA存在下堆肥真菌群落 °C的变化比25°C时大63% °C(52%)。培养时间影响真菌群落结构,在第2个月,群落结构在50时发生了特殊变化 然而,在两种温度下,在第4个月底,在50%(w/w)的PLA与没有PLA的情况下的PLA变得相似,这表明具有高度结晶度的PLA会在堆肥真菌群落中引起时间扰动。在含有50 PLA的堆肥中 °C时,代表真菌种群的某些TRF的丰度增加到30%,这可能涉及PLA的利用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of Degradation of PLA with High Degree of Crystallinity on Fungal Community Structure in Compost
Abstract Degradation rate of poly(lactic acid) (PLA), a compostable plastic, is affected by its physical properties and environmental conditions. Since PLA with different physical properties enter composting systems, investigation of degradation of PLA with strong physical properties in compost at different temperatures and its influence on compost fungal community structure are the main concerns of this study. To determine the effect of slow PLA degradation on fungal communities, PLA granules with high degree of crystallinity, 60%, were incubated in compost at 25 °C and 50 °C for 4 months at 0, 10, 25 and 50% (w/w) concentrations; their degradation rates were compared and impact of PLA degradation on compost fungal communities was examined by terminal restriction fragment length polymorphism (TRFLP). PLA granules in compost at 25 °C showed no physical changes but at 50 °C physical disintegration occurred after 4 months. TRFLP revealed that fungal community profiles in compost were affected by PLA, particularly at 50 °C where PLA degraded. Compost fungal communities in the presence of PLA at 50 °C had more variation, 63%, than at 25 °C (52%). Incubation time affected fungal community structure as during 2nd month, community structure changed specifically at 50 °C and at 50% (w/w) PLA, however, became similar to that in the absence of PLA at the end of 4th month at both temperatures indicating PLA with a high degree of crystallinity causes a temporal perturbation in compost fungal communities. In compost containing PLA at 50 °C, abundance of certain TRFs representing fungal populations increased to 30% which may involve in PLA utilization.
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来源期刊
Compost Science & Utilization
Compost Science & Utilization 农林科学-生态学
CiteScore
4.10
自引率
0.00%
发文量
0
审稿时长
>36 weeks
期刊介绍: 4 issues per year Compost Science & Utilization is currently abstracted/indexed in: CABI Agriculture & Environment Abstracts, CSA Biotechnology and Environmental Engineering Abstracts, EBSCOhost Abstracts, Elsevier Compendex and GEOBASE Abstracts, PubMed, ProQuest Science Abstracts, and Thomson Reuters Biological Abstracts and Science Citation Index
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