Effects of Drought Stress on Non-Structural Carbohydrates in Different Organs of <i>Cunninghamia lanceolata</i>
The Chinese fir <i>Cunninghamia lanceolata</i> (Lamb.) Hook. is an important timber conifer species in China. Much has been studied about Chinese fir, but the distribution of non-structural carbohydrates (NSCs) among different organs (needles, branch, stem, and roots) under drought stres...
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MDPI AG
2023-06-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/12/13/2477 |
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| author | Xiaoyan Huang Wenjuan Guo Li Yang Zhiguang Zou Xinyang Zhang Shalom Daniel Addo-Danso Lili Zhou Shubin Li |
| author_facet | Xiaoyan Huang Wenjuan Guo Li Yang Zhiguang Zou Xinyang Zhang Shalom Daniel Addo-Danso Lili Zhou Shubin Li |
| author_sort | Xiaoyan Huang |
| collection | DOAJ |
| description | The Chinese fir <i>Cunninghamia lanceolata</i> (Lamb.) Hook. is an important timber conifer species in China. Much has been studied about Chinese fir, but the distribution of non-structural carbohydrates (NSCs) among different organs (needles, branch, stem, and roots) under drought stress remains poorly understood. In this study, we used one-year-old <i>C. lanceolata</i> plantlets to evaluate the effects of simulated drought under four water regimes, i.e., adequate water or control, light drought, moderate drought, and severe drought stress corresponding to 80%, 60%, 50%, and 40%, respectively of soil field maximum capacity on various NSCs in the needles, branch, stem and roots. The degree and duration of drought stress had significant effects on fructose, glucose, sucrose, soluble sugar, starch, and NSC content in various organs (<i>p</i> < 0.05). Fructose content increased in stem xylem, stem phloem, and leaves. Glucose and sucrose content declined in stem and branch xylem under light drought stress and moderate drought stress, and increased under severe drought stress conditions. Soluble sugars content declined, and starch content increased in leaf and branch phloem, but the latter could not compensate for soluble sugar consumption in the whole plant, and therefore, total NSCs decreased. Correlation analysis showed that a significant positive correlation existed in the soluble sugar content between leaves and roots, and between xylem and phloem in the stems and branches. Chinese fir appears to have different NSCs distribution strategies in response to drought stress, viz., allocating more soluble sugars to fine roots and increasing starch content in the needles, as well as ensuring osmosis to prevent xylem embolism. Our study may broaden the understanding of the various mechanisms that Chinese fir and other plants have to enhance their tolerance to drought stress. |
| first_indexed | 2024-03-11T01:30:57Z |
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| institution | Directory Open Access Journal |
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| language | English |
| last_indexed | 2024-03-11T01:30:57Z |
| publishDate | 2023-06-01 |
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| series | Plants |
| spelling | doaj.art-092d0462653d495dab1fab169910de072023-11-18T17:18:02ZengMDPI AGPlants2223-77472023-06-011213247710.3390/plants12132477Effects of Drought Stress on Non-Structural Carbohydrates in Different Organs of <i>Cunninghamia lanceolata</i>Xiaoyan Huang0Wenjuan Guo1Li Yang2Zhiguang Zou3Xinyang Zhang4Shalom Daniel Addo-Danso5Lili Zhou6Shubin Li7College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, ChinaCollege of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, ChinaCollege of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, ChinaCollege of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, ChinaCollege of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, ChinaForests and Climate Change Division, CSIR-Forestry Research Institute of Ghana, Kumasi P.O. Box UP 63 KNUST, GhanaChinese Fir Engineering Technology Research Center of the State Forestry and Grassland Administration, Fuzhou 350002, ChinaCollege of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, ChinaThe Chinese fir <i>Cunninghamia lanceolata</i> (Lamb.) Hook. is an important timber conifer species in China. Much has been studied about Chinese fir, but the distribution of non-structural carbohydrates (NSCs) among different organs (needles, branch, stem, and roots) under drought stress remains poorly understood. In this study, we used one-year-old <i>C. lanceolata</i> plantlets to evaluate the effects of simulated drought under four water regimes, i.e., adequate water or control, light drought, moderate drought, and severe drought stress corresponding to 80%, 60%, 50%, and 40%, respectively of soil field maximum capacity on various NSCs in the needles, branch, stem and roots. The degree and duration of drought stress had significant effects on fructose, glucose, sucrose, soluble sugar, starch, and NSC content in various organs (<i>p</i> < 0.05). Fructose content increased in stem xylem, stem phloem, and leaves. Glucose and sucrose content declined in stem and branch xylem under light drought stress and moderate drought stress, and increased under severe drought stress conditions. Soluble sugars content declined, and starch content increased in leaf and branch phloem, but the latter could not compensate for soluble sugar consumption in the whole plant, and therefore, total NSCs decreased. Correlation analysis showed that a significant positive correlation existed in the soluble sugar content between leaves and roots, and between xylem and phloem in the stems and branches. Chinese fir appears to have different NSCs distribution strategies in response to drought stress, viz., allocating more soluble sugars to fine roots and increasing starch content in the needles, as well as ensuring osmosis to prevent xylem embolism. Our study may broaden the understanding of the various mechanisms that Chinese fir and other plants have to enhance their tolerance to drought stress.https://www.mdpi.com/2223-7747/12/13/2477<i>Cunninghamia lanceolata</i> (Lamb.) Hookplant physiologyxylem and phloemsoluble sugarstarchnon-structural carbohydrates |
| spellingShingle | Xiaoyan Huang Wenjuan Guo Li Yang Zhiguang Zou Xinyang Zhang Shalom Daniel Addo-Danso Lili Zhou Shubin Li Effects of Drought Stress on Non-Structural Carbohydrates in Different Organs of <i>Cunninghamia lanceolata</i> Plants <i>Cunninghamia lanceolata</i> (Lamb.) Hook plant physiology xylem and phloem soluble sugar starch non-structural carbohydrates |
| title | Effects of Drought Stress on Non-Structural Carbohydrates in Different Organs of <i>Cunninghamia lanceolata</i> |
| title_full | Effects of Drought Stress on Non-Structural Carbohydrates in Different Organs of <i>Cunninghamia lanceolata</i> |
| title_fullStr | Effects of Drought Stress on Non-Structural Carbohydrates in Different Organs of <i>Cunninghamia lanceolata</i> |
| title_full_unstemmed | Effects of Drought Stress on Non-Structural Carbohydrates in Different Organs of <i>Cunninghamia lanceolata</i> |
| title_short | Effects of Drought Stress on Non-Structural Carbohydrates in Different Organs of <i>Cunninghamia lanceolata</i> |
| title_sort | effects of drought stress on non structural carbohydrates in different organs of i cunninghamia lanceolata i |
| topic | <i>Cunninghamia lanceolata</i> (Lamb.) Hook plant physiology xylem and phloem soluble sugar starch non-structural carbohydrates |
| url | https://www.mdpi.com/2223-7747/12/13/2477 |
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