Regulation of root development in nitrogen-susceptible and nitrogen-tolerant sweet potato cultivars under different nitrogen and soil moisture conditions
Abstract Background Due to unreasonable nitrogen (N) application and water supply, sweet potato vines tend to grow excessively. Early development of storage roots is conducive to inhibiting vine overgrowth. Hence, we investigated how N and soil moisture affect early root growth and development. Resu...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2023-09-01
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| Series: | BMC Plant Biology |
| Online Access: | https://doi.org/10.1186/s12870-023-04461-y |
| _version_ | 1797577122304229376 |
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| author | Wenxue Duan Haiyan Zhang Qingmei Wang Beitao Xie Liming Zhang |
| author_facet | Wenxue Duan Haiyan Zhang Qingmei Wang Beitao Xie Liming Zhang |
| author_sort | Wenxue Duan |
| collection | DOAJ |
| description | Abstract Background Due to unreasonable nitrogen (N) application and water supply, sweet potato vines tend to grow excessively. Early development of storage roots is conducive to inhibiting vine overgrowth. Hence, we investigated how N and soil moisture affect early root growth and development. Results A pot experiment was conducted using the sweet potato cultivars Jishu26 (J26, N-susceptible) and Xushu32 (X32, N-tolerant). Two N application rates of 50 (N1) and 150 mg kg− 1 (N2) and two water regimes, drought stress (DS) (W1) and normal moisture (W2), were applied to each cultivar. For J26, the lowest expansion root weight was observed in the N2W2 treatment, while for X32, the N1W2 and N2W2 treatments resulted in higher root weights compared to other treatments. The interaction between N rates and water regimes significantly affected root surface area and volume in J26. Root cross-sections revealed that N2W2 increased the percentage of root area covered by xylem vessels and decreased the amount of secondary xylem vessels (SXV) in J26. However, in X32, it increased the number of SXV. A high N rate reduced the 13 C distribution ratio in J26 expansion roots, but had no significant effect on X32. In J26, N2W2 inhibited starch synthesis in roots by downregulating the expression of AGPa, AGPb, GBSS I, and SBE I. Conclusion The observed effects were more pronounced in J26. For X32, relatively high N and moisture levels did not significantly impact storage root development. Therefore, special attention should be paid to N supply and soil moisture for N-susceptible cultivars during the early growth stage. |
| first_indexed | 2024-03-10T22:03:33Z |
| format | Article |
| id | doaj.art-a0f4dfe2ee434d3cb6f4d08d0e46d23d |
| institution | Directory Open Access Journal |
| issn | 1471-2229 |
| language | English |
| last_indexed | 2024-03-10T22:03:33Z |
| publishDate | 2023-09-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Plant Biology |
| spelling | doaj.art-a0f4dfe2ee434d3cb6f4d08d0e46d23d2023-11-19T12:52:24ZengBMCBMC Plant Biology1471-22292023-09-0123111210.1186/s12870-023-04461-yRegulation of root development in nitrogen-susceptible and nitrogen-tolerant sweet potato cultivars under different nitrogen and soil moisture conditionsWenxue Duan0Haiyan Zhang1Qingmei Wang2Beitao Xie3Liming Zhang4Crop Research Institute, Shandong Academy of Agricultural SciencesCrop Research Institute, Shandong Academy of Agricultural SciencesCrop Research Institute, Shandong Academy of Agricultural SciencesCrop Research Institute, Shandong Academy of Agricultural SciencesShandong Engineering Laboratory for Characteristic CropsAbstract Background Due to unreasonable nitrogen (N) application and water supply, sweet potato vines tend to grow excessively. Early development of storage roots is conducive to inhibiting vine overgrowth. Hence, we investigated how N and soil moisture affect early root growth and development. Results A pot experiment was conducted using the sweet potato cultivars Jishu26 (J26, N-susceptible) and Xushu32 (X32, N-tolerant). Two N application rates of 50 (N1) and 150 mg kg− 1 (N2) and two water regimes, drought stress (DS) (W1) and normal moisture (W2), were applied to each cultivar. For J26, the lowest expansion root weight was observed in the N2W2 treatment, while for X32, the N1W2 and N2W2 treatments resulted in higher root weights compared to other treatments. The interaction between N rates and water regimes significantly affected root surface area and volume in J26. Root cross-sections revealed that N2W2 increased the percentage of root area covered by xylem vessels and decreased the amount of secondary xylem vessels (SXV) in J26. However, in X32, it increased the number of SXV. A high N rate reduced the 13 C distribution ratio in J26 expansion roots, but had no significant effect on X32. In J26, N2W2 inhibited starch synthesis in roots by downregulating the expression of AGPa, AGPb, GBSS I, and SBE I. Conclusion The observed effects were more pronounced in J26. For X32, relatively high N and moisture levels did not significantly impact storage root development. Therefore, special attention should be paid to N supply and soil moisture for N-susceptible cultivars during the early growth stage.https://doi.org/10.1186/s12870-023-04461-y |
| spellingShingle | Wenxue Duan Haiyan Zhang Qingmei Wang Beitao Xie Liming Zhang Regulation of root development in nitrogen-susceptible and nitrogen-tolerant sweet potato cultivars under different nitrogen and soil moisture conditions BMC Plant Biology |
| title | Regulation of root development in nitrogen-susceptible and nitrogen-tolerant sweet potato cultivars under different nitrogen and soil moisture conditions |
| title_full | Regulation of root development in nitrogen-susceptible and nitrogen-tolerant sweet potato cultivars under different nitrogen and soil moisture conditions |
| title_fullStr | Regulation of root development in nitrogen-susceptible and nitrogen-tolerant sweet potato cultivars under different nitrogen and soil moisture conditions |
| title_full_unstemmed | Regulation of root development in nitrogen-susceptible and nitrogen-tolerant sweet potato cultivars under different nitrogen and soil moisture conditions |
| title_short | Regulation of root development in nitrogen-susceptible and nitrogen-tolerant sweet potato cultivars under different nitrogen and soil moisture conditions |
| title_sort | regulation of root development in nitrogen susceptible and nitrogen tolerant sweet potato cultivars under different nitrogen and soil moisture conditions |
| url | https://doi.org/10.1186/s12870-023-04461-y |
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