Unveiling the germination patterns of Alternaria porri (Ellis) by using regression analysis and hydrothermal time modeling
Yar, Ali, Ullah, Rehman, Khan, Muhammad Nauman, Iqbal, Majid, Ercisli, Sezai, Kaplan, Alevcan, Olana, Diriba Dereje, Javed, Muhammad Ammar, Mohamed, ELsiddig Idriss, Baowidan, Souad, Harakeh, Steve, Moulay, Mohammed
Purple blotch disease is a major fungal disease of Allium cepa L. plants which is caused by the fungus Alternaria porri. The best conditions for the growth of Alternaria porri are temperatures between 22 degrees C and 25 degrees C and relatively high humidity. The Hydrotime, Thermal Time, and Hydrothermal Time models were used to measure different parameters of seed germination; therefore, we used them to measure the interactive effects of temperature and water potential on the germination conidia of Alternaria porri. The laboratory experiments were carried out at five constant temperatures, between 5 and 30 degrees C, and five different water potentials between 0 MPa and - 6 MPa. The germination of Alternaria porri conidia was highest at 25 degrees C and 0 MPa and lowest at 5 degrees C and - 6 MPa. The percentage of conidia germination decreased rapidly after 25 oC. Conidia germination was also affected by different water potentials, decreasing at lower water potential. Models based on HTT showed a reasonable fit to the germination and growth rate datasets. The best fitting model for conidia germination (R2 = 0.98491) was based on variable base and maximum temperature as a function of water potential. Based on the TT, HT, and models, the highest and lowest values for theta T1 were observed at -6.0 MPa at 30 degrees C, and 0 MPa at 5 degrees C and the highest and lowest theta T2 values were recorded at -6.0 MPa at 5 degrees C and 0 MPa at 30 degrees C while the lowest and highest theta H values were recorded at -6.0 MPa at 5 degrees C and 0 MPa at 25 degrees C, respectively, for the HTT model, the predicted theta HTT average value is 16.32 (MPa degrees Ch-1). Based on the statistical analysis, the cardinal hydrothermal time constant (theta HTT) accurately explains the interactive effect of T and Psi on the germination of Alternaria porri conidia under different environmental conditions.
- Journal
- SCIENTIFIC REPORTS
- Year
- 2024
- Volume
- 14
- Issue
- 1
- ISSN
- 2045-2322
- DOI
- 10.1038/s41598-024-76050-4
- WoS UID
- WOS:001345832100023