干旱区生态环境知识资源中心(Arid): Potassium Isotopes in Herbaceous Plants: A Potential New Tool for C3 and C4 Plant Research

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DOI	10.1029/2021JG006682
	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
ISSN	2169-8953
EISSN	2169-8961
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
推荐引用方式 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).