Drought Resistance in Qingke Involves a Reprogramming of the Phenylpropanoid Pathway and UDP-Glucosyltransferase Regulation of Abiotic Stress Tolerance Targeting Flavonoid Biosynthesis
文献类型： 外文期刊
作者： Xu, Congping 1 ; Wei, Lingling 2 ; Huang, Sishu 1 ; Yang, Chunbao 2 ; Wang, Yulin 2 ; Yuan, Hongjun 2 ; Xu, Qijun 2 ; Zha 1 ;
作者机构： 1.Hainan Univ, Coll Trop Crops, Haikou 570228, Peoples R China
2.State Key Lab Hulless Barley & Yak Germplasm Reso, Lhasa 850002, Peoples R China
3.Agr Res Inst, Tibet Acad Agr & Anim Husb Sci Lhasa, Lhasa 850002, Tibet, Peoples R China
4.Tibet Agr & Anim Husb Univ, Plant Sci Coll, Lhasa 860000, Tibet, Peoples R China
5.Wuhan Metware Biotechnol Co Ltd, Wuhan 430070, Peoples R China
关键词： drought stress; phenylpropanoid pathway; flavonoids; UDP-glucosyltransferase; transcriptome; metabolome; qingke
期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：4.192； 五年影响因子：4.289 ）
ISSN： 0021-8561
年卷期： 2021 年 69 卷 13 期
页码：
收录情况： SCI
摘要： Tibetan hulless barley (qingke) is an important food crop in the Tibetan plateau. However, it often suffers from drought stress resulting in reduction of food production because of the extreme plateau environment. To elucidate the molecular mechanisms underlying the drought resistance of qingke, the transcriptomic and metabolomic responses of drought-sensitive (D) and drought-resistant (XL) accessions were characterized in experiments with a time course design. The phenylpropanoid pathway was reprogrammed by downregulating the lignin pathway and increasing the biosynthesis of flavonoids and anthocyanins, and this regulation improved plant tolerance for drought stress. Besides, flavonoid glycosides have induced accumulation of metabolites that participated in drought stress resistance. HVUL7H11410 exhibited the activity of wide-spectrum glucosyltransferase and mediated flavonoid glycosylation to enhance drought stress resistance. Overall, the findings provide insights into the regulatory mechanism underlying drought stress tolerance associated with metabolic reprogramming. Furthermore, the flavonoid-enriched qingke is more tolerant to drought stress and can be used as a functional food to benefit human health.
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