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- Title
Effects of temperature, moisture and nutrition on conidial germination, survival, colonization and sporulation of Trichothecium roseum.
- Authors
Li, Xue; Li, Bao-hua; Lian, Sen; Dong, Xiang-li; Wang, Cai-xia; Liang, Wen-xing
- Abstract
Trichothecium roseum is an important pathogen and causes moldy core and black spots on apple fruit. The effects of temperature, moisture and nutrition on conidial germination, survival, colonization and sporulation of T. roseum were examined in controlled environments. The results revealed that external nutriments, such as extracts from apple fruit and flower promoted the conidial germination. The temperature required for conidial germination and sporulation of T. roseum ranged from 10 °C to 35 °C, with an optimum at approximately 28 °C. No conidia were produced at 35 °C, although conidia germinated at this temperature. The lethal temperature for the conidia was 46 °C and the conidia survived for 6.8 days at 40 °C. The most favorable moisture for conidial germination and sporulation of the pathogen was 95% relative humidity (RH). The humidity limit was RH = 90% for the conidial germination and RH = 70% for the fungal sporulation. At the optimum temperature, the fungi finished one generation (i.e., from conidial germination to sporulation) was no more than two days in Malus micromalus flowers, although the conidia germinated more slowly in vitro. Conidial germination and sporulation dynamics of T. roseum were well described by modified logistic models. The results can be used to develop disease forecasting model and help improving fungicide control of the disease.
- Subjects
BACTERIAL sporulation; FUNGI imperfecti; MICROSTRUCTURE; FUNGAL spores; GERMINATION
- Publication
European Journal of Plant Pathology, 2019, Vol 153, Issue 2, p557
- ISSN
0929-1873
- Publication type
Article
- DOI
10.1007/s10658-018-1583-8