Details

Autor(en) / Beteiligte

• Ren, Yun
• Liu, Jia-Min
• He, Liang-Ping
• Jiang, Jin-Jue
• Gong, Ting
• Zhou, Qian
• Liu, Jing
• Li, Qiang
• Tang, Ning
• Chen, Ze-Xiong

Titel

Effect of Salicylic Acid Treatment on Disease Resistance to Coleosporium zanthoxyli in Chinese Pepper ( Zanthoxylum armatum )

Ist Teil von

• Plant disease, 2024-04, Vol.108 (4), p.960-970

Ort / Verlag

United States

Erscheinungsjahr

2024

Quelle

MEDLINE

Beschreibungen/Notizen

• The fungus causes leaf rust in Chinese pepper ( ). To investigate the control effect of elicitor treatment on leaf rust in this species, the impact of salicylic acid (SA) on the spores and growth of and the induced resistance to leaf rust by were analyzed, and the possible defense mechanisms involved in SA induction were evaluated. The results showed that SA had no effect on spore germination and growth; however, rust resistance was induced in . The optimal SA treatment concentration was 0.4 mg/ml, and the relative cure effect reached 44.56%. SA-induced disease resistance was evident for up to 10 days, while the optimal induction interval was 48 h after stimulation. Consistent with the induced resistance, H O , total protein, total phenol, and lignin concentrations and polyphenol oxidase (PPO), peroxidase (POD), phenylalanine ammonia lyase (PAL), superoxide dismutase (SOD), and catalase (CAT) activities were significantly increased with the SA treatment, whereas the malondialdehyde content was significantly decreased. In addition, exogenous SA promoted defense-related enzyme activities, including those of POD, CAT, and PAL, and increased H O , lignin, and endogenous SA contents. Furthermore, SA induced the expression of SA signaling pathway genes such as and , and silencing enhanced the sensitivity of to leaf rust. Our results demonstrated that 0.4 mg/ml SA priming increased the activities of CAT, POD, and PAL, elevated the contents of H O , lignin, and endogenous SA, and upregulated the expression of the SA-related gene , thereby enhancing the resistance of to leaf rust.