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Journal article
Competition for S-containing amino acids between rhizosphere microorganisms and plant roots: the role of cysteine in plant S acquisition
Biology and fertility of soils, Vol.57(6), pp.825-836
2021
Abstract
Plant S deficiency is common, but the role of S-containing amino acids such as cysteine in plant S uptake is unknown. We applied C-14-, S-35-, C-13-, and N-15-labelled cysteine to wheat and oilseed rape rhizospheres and traced the plants' elemental uptake. Both plants absorbed 0.37-0.81% of intact cysteine after 6 h with no further increase after 24 h. They absorbed 1.6-11.5% S-35 and 12.3-7.6% N-15 from cysteine after 24 h and utilised SO42- as their main S source (75.5-86.4%). Added and naturally occurring cysteine-S contributed 5.6 and 1.1% of total S uptake by wheat and oilseed rape, respectively. Cysteine and inorganic S derived from cysteine contributed 24.5 and 13.6% of uptake for wheat and oilseed rape, respectively, after 24 h. Oilseed rape absorbed similar to 10-fold more S from cysteine and SO42- than did wheat. The highest absorption of free cysteine should be in the organic-rich soil patches. Soil microorganisms rapidly decomposed cysteine (t(1/2) = 1.37 h), and roots absorbed mineralised inorganic N and S. After 15 min, 11.7-14.3% of the S-35-cysteine was retained in the microbial biomass, while 30.2-36.7% of the SO42- was released, suggesting that rapid microbial S immobilisation occurs after cysteine addition. Plants acquire N and S from cysteine via unidirectional soil-to-root nutrient flow, and cysteine is an important S source for plants.
Details
- Title
- Competition for S-containing amino acids between rhizosphere microorganisms and plant roots: the role of cysteine in plant S acquisition
- Authors/Creators
- Qingxu Ma - Bangor UniversityPaul W. Hill - Bangor UniversityDavid R. Chadwick - Bangor UniversityLianghuan Wu - Zhejiang UniversityDavey L. Jones - Bangor University
- Publication Details
- Biology and fertility of soils, Vol.57(6), pp.825-836
- Publisher
- Springer Nature
- Number of pages
- 12
- Grant note
- Chinese Ministry of Science and Technology; Ministry of Science and Technology, China 2020YFD1100402 / National Key Research and Development Program of China 31872180; 31572194 / National Natural Science Foundation of China; National Natural Science Foundation of China (NSFC) BB/N013468/1 / UKChina Virtual Joint Centre for Agricultural Nitrogen (CINAg) - NERC BB/N013468/1 / UKChina Virtual Joint Centre for Agricultural Nitrogen (CINAg) - Newton Fund, via UK BBSRC; UK Research & Innovation (UKRI); Biotechnology and Biological Sciences Research Council (BBSRC)
- Identifiers
- 991005560325207891
- Copyright
- © 2021 Crown Copyright
- Murdoch Affiliation
- Centre for Sustainable Farming Systems
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.45 Soil Science
- 3.45.112 Soil Carbon Dynamics
- Web Of Science research areas
- Soil Science
- ESI research areas
- Agricultural Sciences