A Survey of Phytophthora Species on Hainan Island of South China |
| |
Authors: | Hui-cai Zeng Hon-hing Ho Fuy-Cong Zheng |
| |
Affiliation: | Authors' addresses: The Institute of Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, Hainan, China;;Department of Biology, State University of New York, New Paltz, New York 12561, USA;;College of Environment and Plant Protection, Hainan University, Baodoa Xincun, Danzhou City, Hainan 571737, China (correspondence to H.-H. Ho. E-mail: ) |
| |
Abstract: | During the period 1997–2007, a comprehensive study of the occurrence and distribution of Phytophthora species was conducted on Hainan Island of South China. To date, 14 species of Phytophthora have been recovered and their distribution determined. Phytophthora nicotianae ( =P. parasitica ) is the most important species attacking a wide variety of crops, followed by Phytophthora capsici and Phytophthora citrophthora . In contrast to Phytophthora colocasiae attacking taro leaves throughout the entire island, Phytophthora cyperi was found only once on Digitaria ciliaris in Danzhou. It is of interest to note that Phytophthora heveae, Phytophthora katsurae and Phytophthora insolita are commonly found in forest soil/water of protected mountains without causing any plant diseases. Although Phytophthora species are usually terrestrial or found in fresh water, one isolate of Phytophthora resembling closely the asexual isolates of P. insolita in Hainan was obtained from decaying Rhizophora leaves submerged in seawater. An unidentified Phytophthora species producing non-papillate; internally proliferating sporangia was isolated from the soil in which Ceriops tagel and Bruguiera serangula were growing in a salt water shrimp farm. |
| |
Keywords: | Phytophthora capsici Phytophthora cinnamomi Phytophthora citrophthora Phytophthora heveae Phytophthora insolita Phytophthora katsurae Phytophthora nicotianae marine isolates |
|
|