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Abstract
Two new species of Pustula, P. cancriniae and P. xinyuanensis associated with Cancrinia discoidea and Convolvulus gortschakovii, respectively, are described based on morphological and molecular characters. They were placed in Pustula based on the following morphological characters: primary sporangia with an overall thickened wall, secondary sporangia with laterally thickened annulus, and oospores with reticulate wall ornamentation. In phylogenetic analysis inferred from the cox2 mtDNA region, P. xinyuanensis and P. cancriniae formed two independent lineages, apart from other known species of Pustula. Both morphological and molecular evidence confirmed the placement of the two species in Pustula and showed its relations with similar species in the genus. Moreover, this is the first record of Pustula on Convolvulaceae in the world.
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1 College of Life Sciences/Province-Ministry Joint Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin, Tarim University, Aral, China; Department of Plant Pathology/Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, China
2 Department of Biology, Kunsan National University, Gunsan, South Korea
3 College of Life Sciences/Province-Ministry Joint Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin, Tarim University, Aral, China
4 College of Life Sciences/Province-Ministry Joint Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin, Tarim University, Aral, China; Department of Plant Pathology, Xinjiang Agricultural University, Urumqi, China
5 Department of Plant Pathology/Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, China
6 Division of Environmental Science and ecological engineering, Korea University, Seoul, South Korea