Alginate Oligosaccharide Coordinately Modulates Endogenous Phytohormone Profiles to Enhance Tomato Growth
Alginate oligosaccharides (AOSs) have been shown to be effective in enhancing crop growth. However, their functions in horticulture crops and growth-promoting mechanisms remain insufficiently characterized. This study employed pot cultivation experiments to investigate the effects of AOS root drench...
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2025-05-01
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| author | Yun Li Jianxia Wang Kai Fan Lingru Guo Leiping Hou Yanxiu Miao Meihua Sun Yaling Li Longqiang Bai |
| author_facet | Yun Li Jianxia Wang Kai Fan Lingru Guo Leiping Hou Yanxiu Miao Meihua Sun Yaling Li Longqiang Bai |
| author_sort | Yun Li |
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| description | Alginate oligosaccharides (AOSs) have been shown to be effective in enhancing crop growth. However, their functions in horticulture crops and growth-promoting mechanisms remain insufficiently characterized. This study employed pot cultivation experiments to investigate the effects of AOS root drenching (0, 15, 30, 45 mg·L<sup>−1</sup>) on tomato (<i>Solanum lycopersicum</i> L.) seedling growth, photosynthetic performance, and phytohormone accumulation. The results showed that AOS promoted the leaf count per plant, leaf area of the youngest fully expanded leaves, shoot and root dry mass, chloroplast pigment contents and photosynthetic rate of tomato seedlings. And the 30 mg·L<sup>−1</sup> treatment consistently showed optimal efficacy, in which tomato seedlings also exhibited a significantly longer total root length, a larger root surface area and a greater number of root tips compared to the control. Phytohormone profiling revealed that AOS differentially regulated shoot/root phytohormones as follows: increasing auxins/cytokinins (CKs)/GA<sub>19</sub> content in shoots and Indole-3-acetic acid (IAA)/CKs/1-aminocyclopropane-1-carboxylic acid (ACC) content in roots, while decreasing root Jasmonic acid (JA)/5-deoxystrigol (5DS) contents. Finally, these findings demonstrate that AOS enhances tomato growth by coordinately reprogramming phytohormone homeostasis. |
| format | Article |
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| institution | Kabale University |
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| language | English |
| publishDate | 2025-05-01 |
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| series | Horticulturae |
| spelling | doaj-art-c0dda9cc48bd4effa5552933c36f5ee82025-08-20T03:24:36ZengMDPI AGHorticulturae2311-75242025-05-0111658010.3390/horticulturae11060580Alginate Oligosaccharide Coordinately Modulates Endogenous Phytohormone Profiles to Enhance Tomato GrowthYun Li0Jianxia Wang1Kai Fan2Lingru Guo3Leiping Hou4Yanxiu Miao5Meihua Sun6Yaling Li7Longqiang Bai8College of Horticulture, Shanxi Agricultural University, Jinzhong 030801, ChinaCollege of Horticulture, Shanxi Agricultural University, Jinzhong 030801, ChinaCollege of Horticulture, Shanxi Agricultural University, Jinzhong 030801, ChinaCollege of Horticulture, Shanxi Agricultural University, Jinzhong 030801, ChinaCollege of Horticulture, Shanxi Agricultural University, Jinzhong 030801, ChinaCollege of Horticulture, Shanxi Agricultural University, Jinzhong 030801, ChinaCollege of Horticulture, Shanxi Agricultural University, Jinzhong 030801, ChinaCollege of Horticulture, Shanxi Agricultural University, Jinzhong 030801, ChinaCollege of Horticulture, Shanxi Agricultural University, Jinzhong 030801, ChinaAlginate oligosaccharides (AOSs) have been shown to be effective in enhancing crop growth. However, their functions in horticulture crops and growth-promoting mechanisms remain insufficiently characterized. This study employed pot cultivation experiments to investigate the effects of AOS root drenching (0, 15, 30, 45 mg·L<sup>−1</sup>) on tomato (<i>Solanum lycopersicum</i> L.) seedling growth, photosynthetic performance, and phytohormone accumulation. The results showed that AOS promoted the leaf count per plant, leaf area of the youngest fully expanded leaves, shoot and root dry mass, chloroplast pigment contents and photosynthetic rate of tomato seedlings. And the 30 mg·L<sup>−1</sup> treatment consistently showed optimal efficacy, in which tomato seedlings also exhibited a significantly longer total root length, a larger root surface area and a greater number of root tips compared to the control. Phytohormone profiling revealed that AOS differentially regulated shoot/root phytohormones as follows: increasing auxins/cytokinins (CKs)/GA<sub>19</sub> content in shoots and Indole-3-acetic acid (IAA)/CKs/1-aminocyclopropane-1-carboxylic acid (ACC) content in roots, while decreasing root Jasmonic acid (JA)/5-deoxystrigol (5DS) contents. Finally, these findings demonstrate that AOS enhances tomato growth by coordinately reprogramming phytohormone homeostasis.https://www.mdpi.com/2311-7524/11/6/580AOStomatoplant growthphotosynthetic ratephytohormone |
| spellingShingle | Yun Li Jianxia Wang Kai Fan Lingru Guo Leiping Hou Yanxiu Miao Meihua Sun Yaling Li Longqiang Bai Alginate Oligosaccharide Coordinately Modulates Endogenous Phytohormone Profiles to Enhance Tomato Growth Horticulturae AOS tomato plant growth photosynthetic rate phytohormone |
| title | Alginate Oligosaccharide Coordinately Modulates Endogenous Phytohormone Profiles to Enhance Tomato Growth |
| title_full | Alginate Oligosaccharide Coordinately Modulates Endogenous Phytohormone Profiles to Enhance Tomato Growth |
| title_fullStr | Alginate Oligosaccharide Coordinately Modulates Endogenous Phytohormone Profiles to Enhance Tomato Growth |
| title_full_unstemmed | Alginate Oligosaccharide Coordinately Modulates Endogenous Phytohormone Profiles to Enhance Tomato Growth |
| title_short | Alginate Oligosaccharide Coordinately Modulates Endogenous Phytohormone Profiles to Enhance Tomato Growth |
| title_sort | alginate oligosaccharide coordinately modulates endogenous phytohormone profiles to enhance tomato growth |
| topic | AOS tomato plant growth photosynthetic rate phytohormone |
| url | https://www.mdpi.com/2311-7524/11/6/580 |
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