高程梯度下森林生态系统球囊素相关土壤蛋白质积累对土壤碳储量的影响

IF 3.8 2区 生物学 Q2 MYCOLOGY
Nuttaporn Luyprasert, Palingamoorthy Gnanamoorthy, Shangwen Xia, Ashutosh Kumar Singh, Xiaodong Yang
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引用次数: 0

摘要

丛枝菌根真菌(AMF)产生的糖蛋白Glomalin-related soil protein (GRSP)在森林生态系统土壤有机碳(SOC)储存中起着至关重要的作用。然而,随着森林高程梯度的变化,影响土壤碳含量变化的因素仍然知之甚少,这限制了我们预测通过GRSP进行的土壤碳固存如何应对未来全球变暖的能力。因此,本研究在海拔666 ~ 3892 m的不同森林类型中,对云南热带雨林、亚热带森林和亚高山森林的土壤有机碳含量与气候和土壤因子的关系进行了研究。研究结果表明,随着海拔的升高,AMF孢子丰度下降,而AMF根定植和GRSP浓度增加。特别是在养分有效性较高的亚热带和亚高山森林,GRSP与AMF根定植的正相关强于与孢子丰度的正相关。在3个样地中,土壤有机碳与GRSP呈显著正相关,其中亚热带样地的相关性最强。这些结果表明,GRSP积累对气候和养分循环敏感,强调了AMF活性和GRSP作为AMF衍生化合物在跨海拔梯度介导有机碳储存中的作用,从而有助于减缓气候变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Accumulation of glomalin-related soil protein to soil carbon storage in forest ecosystems along an elevation gradient.

Glomalin-related soil protein (GRSP), a glycoprotein produced by arbuscular mycorrhizal fungi (AMF), plays a critical role in soil organic carbon (SOC) storage in forest ecosystems. However, the factors influencing its variability and contribution to SOC along forest elevation gradients remain poorly understood, limiting our ability to predict how soil carbon sequestration through GRSP will respond to future global warming. Therefore, this study explored the relationships among GRSP and SOC with climatic and edaphic factors along elevation gradients (666-3892 m) spanning diverse forest types in tropical rainforest, subtropical forest, and subalpine forest in Yunnan, Southwest China. Our findings revealed that AMF spore abundance declined, whereas AMF root colonization and GRSP concentrations increased with increasing elevation. GRSP showed a stronger positive correlation with AMF root colonization than with spore abundance, particularly in subtropical and subalpine forests where nutrient availability was higher. A significant positive relationship was observed between GRSP and SOC across all three forest sites, with the strongest association in subtropical forests. These results suggest that GRSP accumulation is sensitive to climate and nutrient cycling, emphasizing the role of AMF activity and GRSP as an AMF-derived compound in mediating SOC storage across elevation gradients, consequently contributing to climate change mitigation.

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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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