2009年造成湖南省水稻大面积矮缩的是南方水稻黑条矮缩病

2009年在湖南省大面积发生一种水稻病毒病,其症状表现为植株矮缩、叶色深绿、高位分蘖、茎秆出现乳白色或浅褐色点条状突起、茎节上出现气生须根。电镜结果表明:在病株韧皮部可见具斐济病毒特征性晶格状排列球状病毒粒体。病毒基因组S10片段部分序列的相似性比对与系统进化树分析表明,该病害是南方水稻黑条矮缩病。

The dwarf disease on rice in Hunan in 2009 was the southern rice black streaked dwarf disease

In 2009, a dwarf disease was observed on the rice Oryza sativa in many districts of Hunan Province, China. The symptoms of the infected rice were stunting, dark leaf, fibrous root in stem nodes and small enations on stems. The results of ultra thin sections by an electron microscope showed that there were typical Fijivirus viroplasma containing crystalline arrayed spherical virons in parenchyma phloem cells of the infected rice. The homology and phylogenetic analyses revealed partial sequence of S10 of the viruses, sharing over 98% nucleotide identities with that of the viruses SRBSDV/RBSDV 2 in Fijivirus. These results suggested that the dwarf disease on rice in Hunan, China in 2009 was the southern rice black streaked dwarf disease.