Barnyard Grass Stress Triggers Changes in Root Traits and Phytohormone Levels in Allelopathic and Non-Allelopathic Rice
Despite the growing knowledge concerning allelopathic interference with barnyard grass, little is understood regarding the competitive physiological mechanisms of the interaction between allelopathic rice and herbicide-resistant barnyard grass. A hydroponic system was employed to investigate the roo...
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MDPI AG
2023-08-01
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| Series: | Biology |
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| Online Access: | https://www.mdpi.com/2079-7737/12/8/1074 |
| _version_ | 1797435972227432448 |
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| author | Qiling Yan Jianhua Tong Shuyan Li Qiong Peng |
| author_facet | Qiling Yan Jianhua Tong Shuyan Li Qiong Peng |
| author_sort | Qiling Yan |
| collection | DOAJ |
| description | Despite the growing knowledge concerning allelopathic interference with barnyard grass, little is understood regarding the competitive physiological mechanisms of the interaction between allelopathic rice and herbicide-resistant barnyard grass. A hydroponic system was employed to investigate the root morphological traits and different phytohormonal changes in allelopathic and non-allelopathic rice cultivars when co-planted with quinclorac-resistant and -susceptible barnyard grass, respectively. The results show that shoot and root biomass were greater in PI. Barnyard grass stress induced an increase in shoot and root biomass in PI at 7 and 14 days of co-culturing rice and barnyard grass. Especially under the stress of quinclorac-resistant barnyard grass, the shoot biomass of PI increased by 23% and 68%, respectively, and the root biomass increased by 37% and 34%, respectively. In terms of root morphology, PI exhibited a significantly higher fine-root length, in root diameters of <0.5 mm, a greater number of root tips, and longer root tips compared to LE. The response to quinclorac-resistant barnyard grass stress was consistent in terms of the SA and JA content. The obvious accumulation of SA and JA was observed in two rice cultivars under quinclorac-resistant barnyard grass stress, with greater amounts of SA and JA in PI. The significant decrease in auxin (IAA) and abscisic acid (ABA) content in rice was detected from 7 to 14 days under co-culture stress. Additionally, highly significant and positive correlations were found between SA and JA content, and the number of root tips and root tip length at root diameters of 0–0.5 mm in rice. |
| first_indexed | 2024-03-09T10:55:58Z |
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| id | doaj.art-18688d03b5174359ae5c362a90a59b88 |
| institution | Directory Open Access Journal |
| issn | 2079-7737 |
| language | English |
| last_indexed | 2024-03-09T10:55:58Z |
| publishDate | 2023-08-01 |
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| series | Biology |
| spelling | doaj.art-18688d03b5174359ae5c362a90a59b882023-12-01T01:38:26ZengMDPI AGBiology2079-77372023-08-01128107410.3390/biology12081074Barnyard Grass Stress Triggers Changes in Root Traits and Phytohormone Levels in Allelopathic and Non-Allelopathic RiceQiling Yan0Jianhua Tong1Shuyan Li2Qiong Peng3Longping Branch, College of Biology, Hunan University, Changsha 410125, ChinaHunan Provincial Key Laboratory of Phytohormones, Agricultural Biotechnology Research Institute, Hunan Academy of Agricultural Sciences, Hunan Agricultural University, Changsha 410128, ChinaLongping Branch, College of Biology, Hunan University, Changsha 410125, ChinaLongping Branch, College of Biology, Hunan University, Changsha 410125, ChinaDespite the growing knowledge concerning allelopathic interference with barnyard grass, little is understood regarding the competitive physiological mechanisms of the interaction between allelopathic rice and herbicide-resistant barnyard grass. A hydroponic system was employed to investigate the root morphological traits and different phytohormonal changes in allelopathic and non-allelopathic rice cultivars when co-planted with quinclorac-resistant and -susceptible barnyard grass, respectively. The results show that shoot and root biomass were greater in PI. Barnyard grass stress induced an increase in shoot and root biomass in PI at 7 and 14 days of co-culturing rice and barnyard grass. Especially under the stress of quinclorac-resistant barnyard grass, the shoot biomass of PI increased by 23% and 68%, respectively, and the root biomass increased by 37% and 34%, respectively. In terms of root morphology, PI exhibited a significantly higher fine-root length, in root diameters of <0.5 mm, a greater number of root tips, and longer root tips compared to LE. The response to quinclorac-resistant barnyard grass stress was consistent in terms of the SA and JA content. The obvious accumulation of SA and JA was observed in two rice cultivars under quinclorac-resistant barnyard grass stress, with greater amounts of SA and JA in PI. The significant decrease in auxin (IAA) and abscisic acid (ABA) content in rice was detected from 7 to 14 days under co-culture stress. Additionally, highly significant and positive correlations were found between SA and JA content, and the number of root tips and root tip length at root diameters of 0–0.5 mm in rice.https://www.mdpi.com/2079-7737/12/8/1074allelopathyroot traitphytohormonebiotic stress |
| spellingShingle | Qiling Yan Jianhua Tong Shuyan Li Qiong Peng Barnyard Grass Stress Triggers Changes in Root Traits and Phytohormone Levels in Allelopathic and Non-Allelopathic Rice Biology allelopathy root trait phytohormone biotic stress |
| title | Barnyard Grass Stress Triggers Changes in Root Traits and Phytohormone Levels in Allelopathic and Non-Allelopathic Rice |
| title_full | Barnyard Grass Stress Triggers Changes in Root Traits and Phytohormone Levels in Allelopathic and Non-Allelopathic Rice |
| title_fullStr | Barnyard Grass Stress Triggers Changes in Root Traits and Phytohormone Levels in Allelopathic and Non-Allelopathic Rice |
| title_full_unstemmed | Barnyard Grass Stress Triggers Changes in Root Traits and Phytohormone Levels in Allelopathic and Non-Allelopathic Rice |
| title_short | Barnyard Grass Stress Triggers Changes in Root Traits and Phytohormone Levels in Allelopathic and Non-Allelopathic Rice |
| title_sort | barnyard grass stress triggers changes in root traits and phytohormone levels in allelopathic and non allelopathic rice |
| topic | allelopathy root trait phytohormone biotic stress |
| url | https://www.mdpi.com/2079-7737/12/8/1074 |
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