气候变化领域集成服务门户(CCPortal): Non-mycorrhizal root-associated fungi increase soil C stocks and stability via diverse mechanisms

CCPortal

DOI	10.5194/bg-21-1037-2024
	Non-mycorrhizal root-associated fungi increase soil C stocks and stability via diverse mechanisms
	Stuart, Emiko K.; Castaneda-Gomez, Laura; Buss, Wolfram; Powell, Jeff R.; Carrillo, Yolima
发表日期	2024
ISSN	1726-4170
EISSN	1726-4189
起始页码	21
结束页码	4
卷号	21 期号:4
英文摘要	While various root-associated fungi could facilitate soil carbon (C) storage and therefore aid climate change mitigation, so far research in this area has largely focused on mycorrhizal fungi, and potential impacts and mechanisms for other fungi are largely unknown. Here, with the aim of identifying novel organisms that could be introduced to crop plants to promote C sequestration, we assessed the soil C storage potential of 12 root-associated, non-mycorrhizal fungal isolates (spanning nine genera and selected from a wide pool based on traits potentially linked to soil C accrual) and investigated fungal, plant and microbial mediators. We grew wheat plants inoculated with individual isolates in chambers allowing continuous 13 C labelling. After harvest, we quantified C storage potential by measuring pools of different origin (plant vs. soil) and different stability with long-term soil incubations and size/density fractionation. We assessed plant and microbial community responses as well as fungal physiological and morphological traits in a parallel in vitro study. While inoculation with 3 of the 12 isolates resulted in significant total soil C increases, soil C stability improved under inoculation with most isolates - as a result of increases in resistant C pools and decreases in labile pools and respired C. Further, these increases in soil C stability were positively associated with various fungal traits and plant growth responses, including greater fungal hyphal density and plant biomass, indicating multiple direct and indirect mechanisms for fungal impacts on soil C storage. We found more evidence for metabolic inhibition of microbial decomposition than for physical limitation under the fungal treatments. Our study provides the first direct experimental evidence in plant-soil systems that inoculation with specific non-mycorrhizal fungal strains can improve soil C storage, primarily by stabilising existing C. By identifying specific fungi and traits that hold promise for enhancing soil C storage, our study highlights the potential of non-mycorrhizal fungi in C sequestration and the need to study the mechanisms underpinning it.
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS类目	Ecology ; Geosciences, Multidisciplinary
WOS记录号	WOS:001190504700001
来源期刊	BIOGEOSCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/304243
作者单位	Western Sydney University; Australian National University
推荐引用方式 GB/T 7714	Stuart, Emiko K.,Castaneda-Gomez, Laura,Buss, Wolfram,et al. Non-mycorrhizal root-associated fungi increase soil C stocks and stability via diverse mechanisms[J],2024,21(4).
APA	Stuart, Emiko K.,Castaneda-Gomez, Laura,Buss, Wolfram,Powell, Jeff R.,&Carrillo, Yolima.(2024).Non-mycorrhizal root-associated fungi increase soil C stocks and stability via diverse mechanisms.BIOGEOSCIENCES,21(4).
MLA	Stuart, Emiko K.,et al."Non-mycorrhizal root-associated fungi increase soil C stocks and stability via diverse mechanisms".BIOGEOSCIENCES 21.4(2024).