GmLecRlk, a Lectin Receptor-like Protein Kinase, Contributes to Salt Stress Tolerance by Regulating Salt-Responsive Genes in Soybean

被引:20
|
作者
Zhang, Yanzheng [1 ]
Fang, Qingwei [1 ]
Zheng, Jiqiang [1 ]
Li, Zeyang [1 ]
Li, Yue [1 ]
Feng, Yuan [1 ]
Han, Yingpeng [1 ]
Li, Yongguang [1 ]
机构
[1] Northeast Agr Univ, Minist Agr & Rural Affairs, Minist Educ China, Key Lab Soybean Biol,Key Lab Soybean Biol & Breed, Harbin 150030, Peoples R China
关键词
soybean; GmLecRlk; lectin receptor protein kinase; salt tolerance; RNA-seq; LEUCINE-RICH REPEAT; ARABIDOPSIS; RECOGNITION; DROUGHT;
D O I
10.3390/ijms23031030
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Soybean [Glycine max (L.) Merr.] is an important oil crop that provides valuable resources for human consumption, animal feed, and biofuel. Through the transcriptome analysis in our previous study, GmLecRlk (Glyma.07G005700) was identified as a salt-responsive candidate gene in soybean. In this study, qRT-PCR analysis showed that the GmLecRlk gene expression level was significantly induced by salt stress and highly expressed in soybean roots. The pCAMBIA3300-GmLecRlk construct was generated and introduced into the soybean genome by Agrobacterium rhizogenes. Compared with the wild type (WT), GmLecRlk overexpressing (GmLecRlk-ox) soybean lines had significantly enhanced fresh weight, proline (Pro) content, and catalase (CAT) activity, and reduced malondialdehyde (MDA) and H2O2 content under salt stress. These results show that GmLecRlk gene enhanced ROS scavenging ability in response to salt stress in soybean. Meanwhile, we demonstrated that GmLecRlk gene also conferred soybean salt tolerance when it was overexpressed alone in soybean hairy root. Furthermore, the combination of RNA-seq and qRT-PCR analysis was used to determine that GmLecRlk improves the salt tolerance of soybean by upregulating GmERF3, GmbHLH30, and GmDREB2 and downregulating GmGH3.6, GmPUB8, and GmLAMP1. Our research reveals a new mechanism of salt resistance in soybean, which exposes a novel avenue for the cultivation of salt-resistant varieties.
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页数:13
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