Genetic variation of BnaA3.NIP5;1 expressing in the lateral root cap contributes to boron deficiency tolerance in Brassica napus.
Boron (B) is essential for vascular plants. Rapeseed (Brassica napus) is the second leading crop source for vegetable oil worldwide, but its production is critically dependent on B supplies. BnaA3.NIP5;1 was identified as a B-efficient candidate gene in B. napus in our previous QTL fine mapping. How...
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Public Library of Science (PLoS)
2021
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oai:doaj.org-article:9c4582b4d9f445529b5d4319a056a6c52021-12-02T20:02:58ZGenetic variation of BnaA3.NIP5;1 expressing in the lateral root cap contributes to boron deficiency tolerance in Brassica napus.1553-73901553-740410.1371/journal.pgen.1009661https://doaj.org/article/9c4582b4d9f445529b5d4319a056a6c52021-07-01T00:00:00Zhttps://doi.org/10.1371/journal.pgen.1009661https://doaj.org/toc/1553-7390https://doaj.org/toc/1553-7404Boron (B) is essential for vascular plants. Rapeseed (Brassica napus) is the second leading crop source for vegetable oil worldwide, but its production is critically dependent on B supplies. BnaA3.NIP5;1 was identified as a B-efficient candidate gene in B. napus in our previous QTL fine mapping. However, the molecular mechanism through which this gene improves low-B tolerance remains elusive. Here, we report genetic variation in BnaA3.NIP5;1 gene, which encodes a boric acid channel, is a key determinant of low-B tolerance in B. napus. Transgenic lines with increased BnaA3.NIP5;1 expression exhibited improved low-B tolerance in both the seedling and maturity stages. BnaA3.NIP5;1 is preferentially polar-localized in the distal plasma membrane of lateral root cap (LRC) cells and transports B into the root tips to promote root growth under B-deficiency conditions. Further analysis revealed that a CTTTC tandem repeat in the 5'UTR of BnaA3.NIP5;1 altered the expression level of the gene, which is tightly associated with plant growth and seed yield. Field tests with natural populations and near-isogenic lines (NILs) confirmed that the varieties carried BnaA3.NIP5;1Q allele significantly improved seed yield. Taken together, our results provide novel insights into the low-B tolerance of B. napus, and the elite allele of BnaA3.NIP5;1 could serve as a direct target for breeding low-B-tolerant cultivars.Mingliang HeSheliang WangCheng ZhangLiu LiuJinyao ZhangShou QiuHong WangGuangsheng YangShaowu XueLei ShiFangsen XuPublic Library of Science (PLoS)articleGeneticsQH426-470ENPLoS Genetics, Vol 17, Iss 7, p e1009661 (2021) |
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Genetics QH426-470 |
| spellingShingle |
Genetics QH426-470 Mingliang He Sheliang Wang Cheng Zhang Liu Liu Jinyao Zhang Shou Qiu Hong Wang Guangsheng Yang Shaowu Xue Lei Shi Fangsen Xu Genetic variation of BnaA3.NIP5;1 expressing in the lateral root cap contributes to boron deficiency tolerance in Brassica napus. |
| description |
Boron (B) is essential for vascular plants. Rapeseed (Brassica napus) is the second leading crop source for vegetable oil worldwide, but its production is critically dependent on B supplies. BnaA3.NIP5;1 was identified as a B-efficient candidate gene in B. napus in our previous QTL fine mapping. However, the molecular mechanism through which this gene improves low-B tolerance remains elusive. Here, we report genetic variation in BnaA3.NIP5;1 gene, which encodes a boric acid channel, is a key determinant of low-B tolerance in B. napus. Transgenic lines with increased BnaA3.NIP5;1 expression exhibited improved low-B tolerance in both the seedling and maturity stages. BnaA3.NIP5;1 is preferentially polar-localized in the distal plasma membrane of lateral root cap (LRC) cells and transports B into the root tips to promote root growth under B-deficiency conditions. Further analysis revealed that a CTTTC tandem repeat in the 5'UTR of BnaA3.NIP5;1 altered the expression level of the gene, which is tightly associated with plant growth and seed yield. Field tests with natural populations and near-isogenic lines (NILs) confirmed that the varieties carried BnaA3.NIP5;1Q allele significantly improved seed yield. Taken together, our results provide novel insights into the low-B tolerance of B. napus, and the elite allele of BnaA3.NIP5;1 could serve as a direct target for breeding low-B-tolerant cultivars. |
| format |
article |
| author |
Mingliang He Sheliang Wang Cheng Zhang Liu Liu Jinyao Zhang Shou Qiu Hong Wang Guangsheng Yang Shaowu Xue Lei Shi Fangsen Xu |
| author_facet |
Mingliang He Sheliang Wang Cheng Zhang Liu Liu Jinyao Zhang Shou Qiu Hong Wang Guangsheng Yang Shaowu Xue Lei Shi Fangsen Xu |
| author_sort |
Mingliang He |
| title |
Genetic variation of BnaA3.NIP5;1 expressing in the lateral root cap contributes to boron deficiency tolerance in Brassica napus. |
| title_short |
Genetic variation of BnaA3.NIP5;1 expressing in the lateral root cap contributes to boron deficiency tolerance in Brassica napus. |
| title_full |
Genetic variation of BnaA3.NIP5;1 expressing in the lateral root cap contributes to boron deficiency tolerance in Brassica napus. |
| title_fullStr |
Genetic variation of BnaA3.NIP5;1 expressing in the lateral root cap contributes to boron deficiency tolerance in Brassica napus. |
| title_full_unstemmed |
Genetic variation of BnaA3.NIP5;1 expressing in the lateral root cap contributes to boron deficiency tolerance in Brassica napus. |
| title_sort |
genetic variation of bnaa3.nip5;1 expressing in the lateral root cap contributes to boron deficiency tolerance in brassica napus. |
| publisher |
Public Library of Science (PLoS) |
| publishDate |
2021 |
| url |
https://doaj.org/article/9c4582b4d9f445529b5d4319a056a6c5 |
| work_keys_str_mv |
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