国立研究開発法人 国際農林水産業研究センター | JIRCAS

Analysis of Phyllody Disease Caused by Phytoplasmas in Sesame and Richardia Plants

JIRCAS Journal
ISSN
13407686
書誌レコードID(総合目録DB)
AA11030483
本文フルテキスト

Sesame phyllody (SP) caused by phloem-limiting bacteria, phytoplasmas, is primarily distributed in the tropics. The characteristic symptoms of this disease consist of malformation of the floral organs which appear as green leaf-like structures. In Northeast Thailand, phyllody symptoms on a rubiaceous plant, Richardia sp. (RP) were observed in addition to SP. Phylogenetically the RP phytoplasmas are close to the SP phytoplasmas based on 16S rDNA data. Hybridization assay using the chromosomal DNA fragment of the SP phytoplasmas, SP28, as a DNA probe showed that the phytoplasmas were distributed not only in flowers showing symptoms but also in symptomless leaves and stems in phyllody-diseased sesame and Richardia plants. Sesame plants inoculated with the udo dwarf phytoplasmas which are different from the SP phytoplasmas phylogenetically showed witches' broom-like symptoms, but not phyllody symptoms. These results suggest that the phyllody symptoms of sesame plants may be due to an inhibition of the morphogenesis of the floral organs by metabolites synthesized by phytoplasmas, rather than an interruption of phloem flow by phytoplasmas.

刊行年月1999-03-01
作成者Kazuo NAKASHIMAWitcha CHALEEPROMPorntip WONGKAEWPisan SIRITHORNShosuke KATO
著者キーワードphytoplasmamycoplasmalike organismdistributionudo dwarf
公開者Japan International Research Center for Agricultural Sciences
データ作成日1999-03-01
国立情報学研究所メタデータ主題語彙集(資源タイプ)Journal Article
7
開始ページ19
終了ページ27
権利Japan International Research Center for Agricultural Sciences
言語eng