Details

Autor(en) / Beteiligte

• Gu, Kai-Di
• Zhang, Quan-Yan
• Yu, Jian-Qiang
• Wang, Jia-Hui
• Zhang, Fu-Jun
• Wang, Chu-Kun
• Zhao, Yu-Wen
• Sun, Cui-Hui
• You, Chun-Xiang
• Hu, Da-Gang
• Hao, Yu-Jin

Titel

R2R3-MYB Transcription Factor MdMYB73 Confers Increased Resistance to the Fungal Pathogen Botryosphaeria dothidea in Apples via the Salicylic Acid Pathway

Ist Teil von

• Journal of agricultural and food chemistry, 2021-01, Vol.69 (1), p.447-458

Ort / Verlag

United States

Erscheinungsjahr

2021

Quelle

MEDLINE

Beschreibungen/Notizen

• MYB transcription factors (TFs) participate in many biological processes. However, the molecular mechanisms by which MYB TFs affect plant resistance to apple ring rot remain poorly understood. Here, the R2R3-MYB gene was cloned from " " apples and functionally characterized as a positive regulator of the defense response to . qRT-PCR and GUS staining demonstrated that was strongly induced in apple fruits and transgenic calli after inoculation with . overexpression improved resistance to in apple calli and fruits, while suppression weakened. Increased resistance to was also observed in -expressing . Interestingly, salicylic acid (SA) contents and the expression levels of genes related with SA synthesis and signaling were greater in -overexpressing plant materials compared to wild-type controls after inoculation, suggesting that MdMYB73 might enhance resistance to the SA pathway. Finally, we discovered that MdMYB73 interacts with MdWRKY31, a positive regulator of . Together, MdWRKY31 and MdMYB73 enhanced resistance in apples. Our results clarify the mechanisms by which MdMYB73 improves resistance to and suggest that resistance may be affected by regulating the SA pathway.