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Root-to-shoot signaling positively mediates source-sink relation in late growth stages in diploid and tetraploid wheat.
- Source :
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BMC plant biology [BMC Plant Biol] 2024 Jun 03; Vol. 24 (1), pp. 492. Date of Electronic Publication: 2024 Jun 03. - Publication Year :
- 2024
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Abstract
- Non-hydraulic root source signaling (nHRS) is a unique positive response to soil drying in the regulation of plant growth and development. However, it is unclear how the nHRS mediates the tradeoff between source and sink at the late growth stages and its adaptive mechanisms in primitive wheat. To address this issue, a root-splitting design was made by inserting solid partition in the middle of the pot culture to induce the occurrence of nHRS using four wheat cultivars (MO1 and MO4, diploid; DM22 and DM31, tetraploid) as materials. Three water treatments were designed as 1) both halves watered (CK), 2) holistic root system watered then droughted (FS), 3) one-half of the root system watered and half droughted (PS). FS and PS were designed to compare the role of the full root system and split root system to induce nHRS. Leaves samples were collected during booting and anthesis to compare the role of nHRS at both growth stages. The data indicated that under PS treatment, ABA concentration was significantly higher than FS and CK, demonstrating the induction of nHRS in split root design and nHRS decreased cytokinin (ZR) levels, particularly in the PS treatment. Soluble sugar and proline accumulation were higher in the anthesis stage as compared to the booting stage. POD activity was higher at anthesis, while CAT was higher at the booting stage. Increased ABA (nHRS) correlated with source-sink relationships and metabolic rate (i.e., leaf) connecting other stress signals. Biomass density showed superior resource acquisition and utilization capabilities in both FS and PS treatment as compared to CK in all plants. Our findings indicate that nHRS-induced alterations in phytohormones and their effect on source-sink relations were allied with the growth stages in primitive wheat.<br /> (© 2024. The Author(s).)
- Subjects :
- Plant Shoots growth & development
Plant Shoots metabolism
Plant Shoots genetics
Plant Growth Regulators metabolism
Abscisic Acid metabolism
Cytokinins metabolism
Plant Leaves growth & development
Plant Leaves metabolism
Plant Leaves genetics
Triticum genetics
Triticum growth & development
Triticum metabolism
Tetraploidy
Plant Roots growth & development
Plant Roots metabolism
Plant Roots genetics
Diploidy
Signal Transduction
Subjects
Details
- Language :
- English
- ISSN :
- 1471-2229
- Volume :
- 24
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- BMC plant biology
- Publication Type :
- Academic Journal
- Accession number :
- 38831289
- Full Text :
- https://doi.org/10.1186/s12870-024-05046-z