Ectomycorrhizal fungal communities of Shorea robusta along an elevation gradient.

IF 3.8 2区 生物学 Q2 MYCOLOGY
Sabitri Shrestha, Sujan Balami, Martina Vašutová, Magda Edwards, Tej Narayan Mandal, Jay Kant Raut, Tilak Prasad Gautam
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Abstract

Shorea robusta (Sal) is an ecologically and economically important hardwood tree species growing in the plains and lower foothills of the Himalayan region. It is a dual-mycorrhizal tree associated with both arbuscular mycorrhizal (AM) and ectomycorrhizal (ECM) fungi. To understand how ECM communities associated with Sal roots are structured, we studied their diversity, composition, and root colonisation in four tropical forests along an elevation gradient (82 to 950 m a.s.l.). The ECM community was not found to be very diverse: we obtained 155 ECM operational taxonomic units (OTUs) belonging to 13 ECM genera in 8 families of Basidiomycota. The genus Tomentella was the most dominant, followed by Russula and Inocybe. Elevation explained 10.2% of variability in ECM composition, and significant effects of forest type, geographic position, soil temperature and moisture were confirmed. The forest at the highest elevation had ECM communities whose community structure was divergent from those at lower elevation. ECM root colonisation significantly decreased with increasing elevation and decreasing available P content. Whereas a low number of ECM species produced a high ECM colonisation of Shorea roots in low-elevation forests, a more diverse ECM community formed a low ECM colonization in high-elevation forests. The identified dominant species may be potentially used as inoculum for Sal forest restoration.

沿海拔梯度分布的赤杨外生菌根真菌群落。
Shorea robusta (Sal)是一种生态和经济上重要的硬木树种,生长在喜马拉雅地区的平原和低山麓。它是一种双菌根树,与丛枝菌根(AM)和外生菌根(ECM)真菌相关。为了了解与Sal根相关的ECM群落的结构,我们研究了海拔梯度为82 ~ 950 m的四种热带森林的ECM群落的多样性、组成和根系定植。ECM群落多样性不高,共获得担子菌科8科13个ECM属155个ECM操作分类单元(OTUs)。以Tomentella属为主,其次为Russula属和Inocybe属。海拔解释了10.2%的ECM组成变异,证实了森林类型、地理位置、土壤温度和湿度的显著影响。海拔最高的森林存在ECM群落,群落结构与海拔较低的不同。随着海拔的升高和速效磷含量的降低,ECM根定植量显著降低。在低海拔森林中,低数量的ECM物种产生了Shorea根的高ECM定殖,而在高海拔森林中,更多样化的ECM群落形成了低ECM定殖。经鉴定的优势种有可能作为盐林恢复的接种物。
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来源期刊
Mycorrhiza
Mycorrhiza 生物-真菌学
CiteScore
8.20
自引率
2.60%
发文量
40
审稿时长
6-12 weeks
期刊介绍: Mycorrhiza is an international journal devoted to research into mycorrhizas - the widest symbioses in nature, involving plants and a range of soil fungi world-wide. The scope of Mycorrhiza covers all aspects of research into mycorrhizas, including molecular biology of the plants and fungi, fungal systematics, development and structure of mycorrhizas, and effects on plant physiology, productivity, reproduction and disease resistance. The scope also includes interactions between mycorrhizal fungi and other soil organisms and effects of mycorrhizas on plant biodiversity and ecosystem structure. Mycorrhiza contains original papers, short notes and review articles, along with commentaries and news items. It forms a platform for new concepts and discussions, and is a basis for a truly international forum of mycorrhizologists from all over the world.
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