Abstract:
:Mulberry dwarf (MD) is a serious infectious disease of mulberry caused by phytoplasma. Infection with MD phytoplasma results in stress phenotypes of yellowing, phyllody, stunting, proliferation, and witches' broom. Physiological and biochemical analysis has shown that infection with MD phytoplasma causes an increase in soluble carbohydrate and starch content, and a decrease in the net photosynthesis rate, carboxylation efficiency, and pigment content of leaves. Furthermore, damage to the chloroplast ultrastructure was detected in infected leaves. To better understand the pathogen-stress response of mulberry (Morus alba L.) to MD phytoplasma, we conducted a comparative proteomic analysis using 2-DE of infected and healthy leaves. Among 500 protein spots that were reproducibly detected, 20 were down-regulated and 17 were up-regulated. MS identified 16 differentially expressed proteins. The photosynthetic proteins rubisco large subunit, rubisco activase, and sedoheptulose-1,7-bisphosphatase showed enhanced degradation in infected leaves. Based these results, a model for the occurrence mechanism of MD is proposed. In conclusion, this study provides new insights into the mulberry response to MD phytoplasma infection.
journal_name
Proteomicsjournal_title
Proteomicsauthors
Ji X,Gai Y,Zheng C,Mu Zdoi
10.1002/pmic.200900012subject
Has Abstractpub_date
2009-12-01 00:00:00pages
5328-39issue
23eissn
1615-9853issn
1615-9861journal_volume
9pub_type
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