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Acta Prataculturae Sinica ›› 2014, Vol. 23 ›› Issue (4): 330-342.DOI: 10.11686/cyxb20140440

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Research progress on alfalfa bacterial diseases

ZHANG Zhen-fen,NAN Zhi-biao   

  1. State Key Laboratory of Grassland Agro-ecosystems,College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730020,China
  • Received:2012-06-14 Online:2014-08-20 Published:2014-08-20

Abstract: Research progress on alfalfa bacterial diseases,both in China and overseas,are reviewed. Nine bacterial diseases of alfalfa were recorded in worldwide and they were caused by 8 bacterial pathogens belonging to 6 genera. They were alfalfa bacterial wilt caused by the gram-positive bacterium (Clavibacter michiganensisi subsp. insidiosus),and 8 bacterial diseases of alfalfa caused by gram-negative bacteria:bacterial sprout wilt (Erwinia persicinus),bacterial sprout rot (Erwinia chrysanthemi pv. chrysanthemi),crown gall (Agrobacterium tumefaciens),crown and root rot complex (Pseudomonas viridiflava),bacterial leaf spot and damping off (Xanthomonas campestris pv. alfalfae),bacterial stem blight (Pseudomonas syringae pv. syringae) and dwarf (Xylella fastidiosa). Alfalfa bacterial leaf spot and bacterial stem blight were recorded,and bacterial sprout wilt,a new disease,was first reported in 2012,in China. In this paper,the types of alfalfa bacterial diseases and their characteristics,distribution and host range are summarized and listed. The symptoms distinguishing methods and pathogen phenotypic characteristics of alfalfa bacterial diseases are detailed. The frequently used phenotypic characteristic identification methods for alfalfa bacterial pathogen were used together with 16S rRNA sequence analysis and the Biolog identification system.

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