Basal stem rot of vegetables in controlled environment greenhouses in western Saudi Arabia : (A) studies on the causal agent Pythium aphanidermatum
Other Title(s)
تعفن قاعدة الساق في الخضر المزروعة في البيوت المحمية في غرب المملكة العربية السعودية : (أ) دراسات عن سبب Pythium aphanidermatum
Author
Source
Journal of King Abdul Aziz University : Meteorology, Environment and Arid land Agriculture Sciences
Issue
Vol. 12, Issue - (31 Dec. 2001), pp.11-23, 13 p.
Publisher
King Abdulaziz University Scientific Publishing Center
Publication Date
2001-12-31
Country of Publication
Saudi Arabia
No. of Pages
13
Main Subjects
Abstract EN
Samples of diseased cucumber (Cucumis sativus L.), cantaloupe (Cucumis melo var.
cantalopensis) and sweet pepper (capsicum annum L.) exhibiting basal stem rot and damping off were collected from controlled environment greenhouses in the western region of Saudi Arabia.
Based on morphological characterization of vegetative and sexual structures (mycelium, zoospores and oospores), the causal agent was identified as Pythium aphanidermatum (Edson) Fitsp.
Mycelium was hyaline, non-septate.
Oogonia were spherical and terminal with dome-shaped, diclenous (antheridia and oogonia from different hyphae) and intercalary antheridia (one antheridium per oogonium).
Oospores were spherical and aplerotic (partially filling oogonia).
Sporangia were inflated filamentous or lobulate that germinate giving vesicles containing zoospores, which soon be released.
Four different culture broth media, V-8 Juice Broth (V-8JB), Oat Meal Broth (OMB), Corn Meal Broth (CMB) and Potato Broth (PB) were quantitatively evaluated for vegetative growth and induction of reproductive structures.
The highest mycelial dry weight was significantly (at P ≤ 0.05) observed on OMB.
No significant difference (at P ≤ 0.05) were found between PB and V-8JB.
On the other hand, the lowest mycelial growth was detected on CMB.
Oospore density was significantly (at P ≤ 0.05) the highest on CMB followed by V- 8JB then OMB.
However, oospores were not formed on PB.
Zoospore production, on the other hand was the highest when the fungus was grown in V-8JA, followed by OMA, PA then CMA.
American Psychological Association (APA)
Sunbul, Yahya Hamzah. 2001. Basal stem rot of vegetables in controlled environment greenhouses in western Saudi Arabia : (A) studies on the causal agent Pythium aphanidermatum. Journal of King Abdul Aziz University : Meteorology, Environment and Arid land Agriculture Sciences،Vol. 12, no. -, pp.11-23.
https://search.emarefa.net/detail/BIM-370552
Modern Language Association (MLA)
Sunbul, Yahya Hamzah. Basal stem rot of vegetables in controlled environment greenhouses in western Saudi Arabia : (A) studies on the causal agent Pythium aphanidermatum. Journal of King Abdul Aziz University : Meteorology, Environment and Arid land Agriculture Sciences Vol. 12 (2001), pp.11-23.
https://search.emarefa.net/detail/BIM-370552
American Medical Association (AMA)
Sunbul, Yahya Hamzah. Basal stem rot of vegetables in controlled environment greenhouses in western Saudi Arabia : (A) studies on the causal agent Pythium aphanidermatum. Journal of King Abdul Aziz University : Meteorology, Environment and Arid land Agriculture Sciences. 2001. Vol. 12, no. -, pp.11-23.
https://search.emarefa.net/detail/BIM-370552
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 20-21
Record ID
BIM-370552