Role of Carrot (<i>Daucus carota</i> L.) Storage Roots in Drought Stress Adaptation: Hormonal Regulation and Metabolite Accumulation
<b>Background:</b> Drought stress has become one of the biggest concerns in threating the growth and yield of carrots (<i>Daucus carota</i> L.). Recent studies have shed light on the physiological and molecular metabolisms in response to drought in the carrot plant; however,...
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| author | Kyoung Rok Geem Ye-Jin Lee Jeongmin Lee Dain Hong Ga-Eun Kim Jwakyung Sung |
| author_facet | Kyoung Rok Geem Ye-Jin Lee Jeongmin Lee Dain Hong Ga-Eun Kim Jwakyung Sung |
| author_sort | Kyoung Rok Geem |
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| description | <b>Background:</b> Drought stress has become one of the biggest concerns in threating the growth and yield of carrots (<i>Daucus carota</i> L.). Recent studies have shed light on the physiological and molecular metabolisms in response to drought in the carrot plant; however, tissue-specific responses and regulations are still not fully understood. <b>Methods:</b> To answer this curiosity, this study investigated the interplay among carrot tissues, such as leaves (L); storage roots (SRs); and lateral roots (LRs) under drought conditions. This study revealed that the SRs played a crucial role in an early perception by upregulating key genes, including <i>DcNCED3</i> (ABA biosynthesis) and <i>DcYUCCA6</i> (auxin biosynthesis). The abundance of osmolytes (proline; GABA) and carbohydrates (sucrose; glucose; fructose; mannitol; and inositol) was also significantly increased in each tissue. In particular, LRs accumulated high levels of these metabolites and promoted growth under drought conditions. <b>Conclusions:</b> Our findings suggest that the SR acts as a central regulator in the drought response of carrots by synthesizing ABA and auxin, which modulate the accumulation of metabolites and growth of LRs. This study provides new insights into the mechanisms of tissue-specific carrot responses to drought tolerance, emphasizing that the SR plays a key role in improving drought resistance. |
| format | Article |
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| institution | Kabale University |
| issn | 2218-1989 |
| language | English |
| publishDate | 2025-01-01 |
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| spelling | doaj-art-9abb32b74f7c435fa6871e574294af892025-01-24T13:41:18ZengMDPI AGMetabolites2218-19892025-01-011515610.3390/metabo15010056Role of Carrot (<i>Daucus carota</i> L.) Storage Roots in Drought Stress Adaptation: Hormonal Regulation and Metabolite AccumulationKyoung Rok Geem0Ye-Jin Lee1Jeongmin Lee2Dain Hong3Ga-Eun Kim4Jwakyung Sung5Department of Crop Science, Chungbuk National University, Cheong-ju 28644, Republic of KoreaDivision of Soil and Fertilizer, National Institute of Agricultural Sciences, RDA, Wanju 55365, Republic of KoreaDepartment of Crop Science, Chungbuk National University, Cheong-ju 28644, Republic of KoreaDepartment of Crop Science, Chungbuk National University, Cheong-ju 28644, Republic of KoreaDepartment of Crop Science, Chungbuk National University, Cheong-ju 28644, Republic of KoreaDepartment of Crop Science, Chungbuk National University, Cheong-ju 28644, Republic of Korea<b>Background:</b> Drought stress has become one of the biggest concerns in threating the growth and yield of carrots (<i>Daucus carota</i> L.). Recent studies have shed light on the physiological and molecular metabolisms in response to drought in the carrot plant; however, tissue-specific responses and regulations are still not fully understood. <b>Methods:</b> To answer this curiosity, this study investigated the interplay among carrot tissues, such as leaves (L); storage roots (SRs); and lateral roots (LRs) under drought conditions. This study revealed that the SRs played a crucial role in an early perception by upregulating key genes, including <i>DcNCED3</i> (ABA biosynthesis) and <i>DcYUCCA6</i> (auxin biosynthesis). The abundance of osmolytes (proline; GABA) and carbohydrates (sucrose; glucose; fructose; mannitol; and inositol) was also significantly increased in each tissue. In particular, LRs accumulated high levels of these metabolites and promoted growth under drought conditions. <b>Conclusions:</b> Our findings suggest that the SR acts as a central regulator in the drought response of carrots by synthesizing ABA and auxin, which modulate the accumulation of metabolites and growth of LRs. This study provides new insights into the mechanisms of tissue-specific carrot responses to drought tolerance, emphasizing that the SR plays a key role in improving drought resistance.https://www.mdpi.com/2218-1989/15/1/56ABAauxincarbohydratescarrot (<i>Daucus carota</i> L.)GABAosmolytes |
| spellingShingle | Kyoung Rok Geem Ye-Jin Lee Jeongmin Lee Dain Hong Ga-Eun Kim Jwakyung Sung Role of Carrot (<i>Daucus carota</i> L.) Storage Roots in Drought Stress Adaptation: Hormonal Regulation and Metabolite Accumulation Metabolites ABA auxin carbohydrates carrot (<i>Daucus carota</i> L.) GABA osmolytes |
| title | Role of Carrot (<i>Daucus carota</i> L.) Storage Roots in Drought Stress Adaptation: Hormonal Regulation and Metabolite Accumulation |
| title_full | Role of Carrot (<i>Daucus carota</i> L.) Storage Roots in Drought Stress Adaptation: Hormonal Regulation and Metabolite Accumulation |
| title_fullStr | Role of Carrot (<i>Daucus carota</i> L.) Storage Roots in Drought Stress Adaptation: Hormonal Regulation and Metabolite Accumulation |
| title_full_unstemmed | Role of Carrot (<i>Daucus carota</i> L.) Storage Roots in Drought Stress Adaptation: Hormonal Regulation and Metabolite Accumulation |
| title_short | Role of Carrot (<i>Daucus carota</i> L.) Storage Roots in Drought Stress Adaptation: Hormonal Regulation and Metabolite Accumulation |
| title_sort | role of carrot i daucus carota i l storage roots in drought stress adaptation hormonal regulation and metabolite accumulation |
| topic | ABA auxin carbohydrates carrot (<i>Daucus carota</i> L.) GABA osmolytes |
| url | https://www.mdpi.com/2218-1989/15/1/56 |
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