Nutrient and stoichiometric characteristics of various organs in three typical desert plants from extreme desert ecosystems

IF 3.4 3区生物学 Q1 PLANT SCIENCES

Rhizosphere Pub Date : 2025-02-08 DOI:10.1016/j.rhisph.2025.101025

Yi Du , Yulin Zhang , Zhihao Zhang , Yanju Gao , Zhaobin Mu , Waqar Islam , Fanjiang Zeng

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引用次数: 0

Abstract

Predicting how fragile and sensitive desert ecosystems will react to environmental changes depends on understanding how soil factors influence plant nutrient concentration and stoichiometry. We studied nutrients and stoichiometric characteristics of various organs of three desert plants (Alhagi sparsifolia, Tamarix ramosissima, and Calligonum caput-medusae) in Turpan (TLF), Tarim (CL), and Dzungaria (MSW) basins of Xinjiang, China. The results showed that in three regions (CL, MSW, and TLF), the nutrient levels of total nitrogen (TN) and total potassium (TK) in the leaves, roots, and branches of A. sparsifolia were significantly higher than those of C. caput-medusae. The total phosphorus (TP) contents in the leaves, roots, and branches of A. sparsifolia were significantly higher than those of T. ramosissima and C. caput-medusae. However, the nitrogen-to-phosphorus ratio in the leaf of C. caput-medusae was significantly lower compared with A. sparsifolia and T. ramosissima. A. sparsifolia had higher root organic carbon content compared with its branches and leaves, while its leaves had higher nutrient levels of TN and TK compared with its roots and branches. The leaf organic carbon contents of T. ramosissima and C. caput-medusae were lower compared with roots and branches, but higher leaf nutrients (TN, TP, and TK contents) than in roots and branches. The soil nutrients of three desert plants experienced significant nitrogen and phosphorus element limitations. Soil electrical conductivity (EC) was identified as a common environmental factor influencing the nutrient changes in the leaves, branches, and roots of desert plants. The structural equation model that soil pH was positively correlated with branch and root stoichiometry, however, soil EC was negatively correlated with root stoichiometry. This research offers a scientific foundation and essential information for the conservation and rehabilitation of desert ecosystems.

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来源期刊

Rhizosphere Agricultural and Biological Sciences-Agronomy and Crop Science

CiteScore

5.70

自引率

8.10%

发文量

155

审稿时长

29 days

期刊介绍： Rhizosphere aims to advance the frontier of our understanding of plant-soil interactions. Rhizosphere is a multidisciplinary journal that publishes research on the interactions between plant roots, soil organisms, nutrients, and water. Except carbon fixation by photosynthesis, plants obtain all other elements primarily from soil through roots. We are beginning to understand how communications at the rhizosphere, with soil organisms and other plant species, affect root exudates and nutrient uptake. This rapidly evolving subject utilizes molecular biology and genomic tools, food web or community structure manipulations, high performance liquid chromatography, isotopic analysis, diverse spectroscopic analytics, tomography and other microscopy, complex statistical and modeling tools.