Arid
DOI10.1029/2021JG006682
Potassium Isotopes in Herbaceous Plants: A Potential New Tool for C3 and C4 Plant Research
Qu, Rui; Han, Guilin
通讯作者Han, GL
来源期刊JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN2169-8953
EISSN2169-8961
出版年2022
卷号127期号:11
英文摘要Plants play a critical role in the surficial environment, influencing energy transfer, the global carbon cycle, and climate change. Potassium (K) controls many essential plant physiological features like photosynthesis, cell osmosis adjustment, and enzyme activity. However, few plant species of K isotopes have been investigated and knowledge regarding the mechanism of isotopic fractionations in biological processes is still limited. This study investigated foliar K isotopic compositions of C-3 and C-4 vegetation and soil in the typical karst region of Guizhou Province, Southwest China. The results showed that: (a) The delta K-41 of soil ranged from -0.04 parts per thousand to -0.08 parts per thousand, with no K isotope ratios change between topsoil and subsoil. (b) Foliar delta K-41 of C-3 vegetation ranged from -1.06 +/- 0.06 parts per thousand to -0.15 +/- 0.06 parts per thousand and foliar delta K-41 of C-4 vegetation varied from 0.28 +/- 0.05 parts per thousand to 1.15 +/- 0.06 parts per thousand. (c) Foliar delta K-41 was negatively related to foliar K concentration (R-2 = 0.78; p < 0.01); The significant K isotope differences between C-3 and C-4 vegetation are likely attributed to their different mechanisms for drought stress or their different foliar K concentration. This study firstly documented the potential of K isotopes as a novel tool for biological processes to distinguish between C-3 and C-4 plants and also shed light on the potential future application of K isotope signatures in soil-plant interactions.
英文关键词potassium isotopes tracer C-3 and C-4 plant Southwest China
类型Article
语种英语
收录类别SCI-E
WOS记录号WOS:000878303600001
WOS关键词MC-ICP-MS ; RICE ORYZA-SATIVA ; ROCKY DESERTIFICATION ; FOLIAR-DELTA ; KARST FOREST ; ASH CONTENT ; LEAVES ; MAGNESIUM ; NUTRIENT ; CALCIUM
WOS类目Environmental Sciences ; Geosciences, Multidisciplinary
WOS研究方向Environmental Sciences & Ecology ; Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/393462
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GB/T 7714
Qu, Rui,Han, Guilin. Potassium Isotopes in Herbaceous Plants: A Potential New Tool for C3 and C4 Plant Research[J],2022,127(11).
APA Qu, Rui,&Han, Guilin.(2022).Potassium Isotopes in Herbaceous Plants: A Potential New Tool for C3 and C4 Plant Research.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,127(11).
MLA Qu, Rui,et al."Potassium Isotopes in Herbaceous Plants: A Potential New Tool for C3 and C4 Plant Research".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 127.11(2022).
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