Journal Article Epublish
PubMed: 39765845 DOI: 10.3390/antiox13121517
(T6) Peptaibols Inhibiting the Growth and Inducing Pear Fruit Resistance in Its Infection.
Antioxidants (Basel) 13(12)
Authors: Hang Lv, Shuwu Zhang, Nan Ma, Solomon Boamah, Bingliang Xu
Affiliations
- College of Plant Protection, Gansu Agricultural University, Lanzhou 730070, China.
- Biocontrol Engineering Laboratory of Crop Diseases and Pests of Gansu Province, Lanzhou 730070, China.
- College of Plant Protection, Gansu Agricultural University, Lanzhou 730070, China. Biocontrol Engineering Laboratory of Crop Diseases and Pests of Gansu Province, Lanzhou 730070, China. State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China.
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China.
Abstract
Pear fruit brown rot, caused by , affects pear fruit yields and quality. The present study determined T6 (T6) peptaibols as a biological control alternative to synthetic fungicides and assessed its efficacy against through dual plate culture and surface spraying at different concentrations. T6 peptaibols effectively inhibited growth, achieving an 85.99% inhibitory rate at 1250 µg/mL after inoculation on PDA medium for 5 days, and 84.57% control efficacy on pear fruit with the same concentration at 6 days. Treatment with T6 peptaibols significantly decreased the average contents of malondialdehyde (MDA) and hydrogen peroxide (HO), as well as electrolyte leakage, by 31.99%, 27.93%, and 21.00% from days 1 to 9 post-inoculation, respectively, in comparison to the negative control. Additionally, the average antioxidant enzyme activities of catalase (CAT), superoxide dismutase (SOD), peroxidase (POD) and polyphenol oxidase (PPO) increased by 86.27%, 56.76%, 25.94%, and 47.88%, respectively; the average defense enzyme activities of phenylalanine ammonia-lyase (PAL), lipoxygenase (LOX), chitinase (CHI), and β-1,3-glucanase (β-Glu) increased by 63.00%, 55.70%, 26.19%, and 16.34%, respectively. Moreover, the expression levels of the antioxidant and defense-related genes (, , , , , , , ) were significantly upregulated by 2.80, 2.81, 3.03, 2.79, 3.37, 2.49, 2.73, and 1.83-folds at 3 days after inoculation compared to the negative control. Thus, T6 peptaibols effectively reduced the pathogen infection through growth inhibition and antioxidant defenses, thereby boosting fruit immunity.
MeSH
Growth, Peroxides, Fruit, Antioxidants, Enzymes, Peptaibols, Infections