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Glomalin-Related Soil Protein Reflects the Heterogeneity of Substrate and Vegetation in the campo rupestre Ecosystem
Journal of Soil Science and Plant Nutrition ( IF 3.4 ) Pub Date : 2021-01-12 , DOI: 10.1007/s42729-020-00396-7
Vanessa M. Gomes , Igor R. Assis , Richard J. Hobbs , G. Wilson Fernandes

We examined whether glomalin-related soil protein (GRSP), produced by arbuscular mycorrhizal fungi (AMF), and with role in soil quality, structuring, and carbon storage, varies in relation to substrate and plant community in the campo rupestre ecosystem. Soil samples were collected for physical-chemical and GRSP content analysis, in 40 plots, where the vegetation was also surveyed. GRSP content was compared between substrate types, and its relationship was assessed against soil attributes, vegetation dissimilarity, and abundance of non-mycorrhizal species and species with low AMF dependency. GRSP content varied greatly among the sites (total fraction ranging from 4.66 to 135.46 mg g −1 ), differed significantly between ferruginous and quartzitic substrates, and was correlated with soil organic carbon (SOC), soil nutrients, soil texture, and vegetation dissimilarity. Total glomalin contributed about 20% to the SOC. GRSP content declined with increasing cover of species that are both sand-binding and have AMF associations, and non-mycorrhizal species. The study shows how AMF, through GRSP, is associated to the ecosystem heterogeneity, suggesting the GRSP as an important soil factor to be considered in management and conservation issues in campo rupestre and similar ecosystems. GRSP content was shown to contribute to carbon storage and was linked to soil chemical and physical properties, and affected by variation in cover of non- or less-AMF-dependent plant species, perhaps providing a useful indicator in the heterogeneous campo rupestre system.

中文翻译:

Glomalin 相关土壤蛋白反映了 Campo rupestre 生态系统中基质和植被的异质性

我们研究了由丛枝菌根真菌 (AMF) 产生并在土壤质量、结构和碳储存中发挥作用的球囊蛋白相关土壤蛋白 (GRSP) 是否因 Campo rupestre 生态系统中的基质和植物群落而异。在 40 个地块中收集土壤样品用于物理化学和 GRSP 含量分析,其中还对植被进行了调查。GRSP 含量在基质类型之间进行比较,并根据土壤属性、植被差异、非菌根物种和具有低 AMF 依赖性的物种的丰度评估其关系。GRSP 含量在不同地点之间差异很大(总分数范围为 4.66 至 135.46 mg g -1 ),在铁质和石英质基质之间差异显着,并且与土壤有机碳 (SOC)、土壤养分、土壤质地、和植被的不同。总球囊蛋白对 SOC 的贡献约为 20%。GRSP 含量随着固沙和具有 AMF 关联的物种以及非菌根物种的覆盖率的增加而下降。该研究表明 AMF 如何通过 GRSP 与生态系统异质性相关联,表明 GRSP 是在 Campo rupestre 和类似生态系统的管理和保护问题中需要考虑的重要土壤因素。GRSP 含量被证明有助于碳储存,并与土壤化学和物理特性有关,并受非或较少依赖 AMF 的植物物种覆盖变化的影响,这可能为异质 Campo rupestre 系统提供了一个有用的指标。GRSP 含量随着固沙和具有 AMF 关联的物种以及非菌根物种的覆盖率的增加而下降。该研究表明 AMF 如何通过 GRSP 与生态系统异质性相关联,表明 GRSP 是在 Campo rupestre 和类似生态系统的管理和保护问题中需要考虑的重要土壤因素。GRSP 含量被证明有助于碳储存,并与土壤化学和物理特性有关,并受非或较少依赖 AMF 的植物物种覆盖变化的影响,这可能为异质 Campo rupestre 系统提供了一个有用的指标。GRSP 含量随着固沙和具有 AMF 关联的物种以及非菌根物种的覆盖率的增加而下降。该研究表明 AMF 如何通过 GRSP 与生态系统异质性相关联,表明 GRSP 是在 Campo rupestre 和类似生态系统的管理和保护问题中需要考虑的重要土壤因素。GRSP 含量被证明有助于碳储存,并与土壤化学和物理特性有关,并受非或较少依赖 AMF 的植物物种覆盖变化的影响,这可能为异质 Campo rupestre 系统提供了一个有用的指标。建议将 GRSP 作为重要的土壤因素,在 Campo rupestre 和类似生态系统的管理和保护问题中予以考虑。GRSP 含量被证明有助于碳储存,并与土壤化学和物理特性有关,并受非或较少依赖 AMF 的植物物种覆盖变化的影响,这可能为异质 Campo rupestre 系统提供了一个有用的指标。建议将 GRSP 作为重要的土壤因素,在 Campo rupestre 和类似生态系统的管理和保护问题中予以考虑。GRSP 含量被证明有助于碳储存,并与土壤化学和物理特性有关,并受非或较少依赖 AMF 的植物物种覆盖变化的影响,这可能为异质 Campo rupestre 系统提供了一个有用的指标。
更新日期:2021-01-12
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