Details

Autor(en) / Beteiligte

• Wang, Ting
• Li, Pan
• Mu, Tianjiao
• Dong, Guangrui
• Zheng, Chengchao
• Jin, Shanghui
• Chen, Tingting
• Hou, Bingkai
• Li, Yanjie

Titel

Overexpression of UGT74E2 , an Arabidopsis IBA Glycosyltransferase, Enhances Seed Germination and Modulates Stress Tolerance via ABA Signaling in Rice

Ist Teil von

• International journal of molecular sciences, 2020-10, Vol.21 (19), p.7239

Ort / Verlag

Switzerland: MDPI AG

Erscheinungsjahr

2020

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• UDP-glycosyltransferases (UGTs) play key roles in modulating plant development and responses to environmental challenges. Previous research reported that the Arabidopsis UDP-glucosyltransferase 74E2 ( ), which transfers glucose to indole-3-butyric acid (IBA), is involved in regulating plant architecture and stress responses. Here, we show novel and distinct roles of in rice. We found that overexpression of in rice could enhance seed germination. This effect was also observed in the presence of IBA and abscisic acid (ABA), as well as salt and drought stresses. Further investigation indicated that the overexpression lines had lower levels of free IBA and ABA compared to wild-type plants. Auxin signaling pathway gene expression such as for and genes, as well as ABA signaling pathway genes and was substantially downregulated in germinating seeds of overexpression lines. Consistently, due to reduced IBA and ABA levels, the established seedlings were less tolerant to drought and salt stresses. The regulation of rice seed germination and stress tolerance could be attributed to IBA and ABA level alterations, as well as modulation of the auxin/ABA signaling pathways by . The distinct roles of in rice implied that complex and different molecular regulation networks exist between Arabidopsis and rice.