Responses of tea plants (Camellia sinensis) with different low-nitrogen tolerances during recovery from nitrogen deficiency
文献类型： 外文期刊
作者： Ruan, Li 1 ; Wei, Kang 1 ; Li, Jianwu 2 ; He, Mengdi 1 ; Wu, Liyun 1 ; Aktar, Shirin 1 ; Wang, Liyuan 1 ; Cheng, Hao 1 ;
作者机构： 1.Chinese Acad Agr Sci, Natl Ctr Tea Improvement, Key Lab Tea Plant Biol & Resources Utilizat, Minist Agr,Tea Res Inst, Hangzhou 310008, Peoples R China
2.Zhejiang A&F Univ, Key Lab Soil Contaminat Bioremediat Zhejiang Prov, Hangzhou, Peoples R China
关键词： tea tree; N recovery; N absorption rate; N use efficiency; FAAs; transcriptome
期刊名称：JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE （ 影响因子：3.639； 五年影响因子：3.803 ）
ISSN： 0022-5142
年卷期：
页码：
收录情况： SCI
摘要： BACKGROUND Tea plants have high nitrogen (N) consumptions, whereas molecular and physiological responses of tea plants to N recovery are still unclear. RESULTS By using non-invasive micro-test technology (NMT), N-15 tracer technique, ultra-performance liquid chromatography (UPLC), and transcriptome sequencing technology, we investigated the N recovery-induced changes in N absorptions, N tissue distributions, contents of free amino acids (FAAs), and global transcription of the low-N tolerant and intolerant tea genotypes [i.e. Wuniuzao (W) and Longjing43 (L)]. The results showed that the phenotype of Wuniuzao was better than that of Longjing43 under low-N condition. The N absorption and utilization of Wuniuzao were superior to Longjing43 under N recovery. The gamma-aminobutyric acid (GABA) ratio (N recovery/N deficiency) in the root of Wuniuzao was significantly higher than that of Longjing43, while the glutamic acid ratio in the root of Wuniuzao was significantly lower than that of Longjing43. This findings suggested that Wuniuzao tended to enhance the GABA synthesis, while Longjing43 tended to inhibit the GABA synthesis under N recovery. The key genes in response to N recovery in Wuniuzao included N transport (AMT and NRT), N transformation (NR, NirA, and GAD), and amino acid transport (GAT) genes. In addition, some ribosome and flavonoid biosynthesis genes might help to maintain proteome homeostasis. CONCLUSION The N absorption and transport, and the conversion abilities of key amino acids (Glu and GABA) might improve the adaptability of tea plants to N recovery, which provided a basis for the breeding of N efficient tea varieties. (c) 2021 Society of Chemical Industry
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