Biological role of xanthomonadin pigments in Xanthomonas campestris pv. campestris
Biological role of xanthomonadin pigments in Xanthomonas campestris pv. campestris
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DOI：
10.1128/aem.66.12.5123-5127.2000
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发表时间：
2000-12-01
影响因子：
4.4
通讯作者：
Chun, W
中科院分区：
文献类型：
--
作者：
Poplawsky, AR;Urban, SC;Chun, W
以前的研究表明，黄色素（黄单胞菌）产生的植物病原性细菌是不重要的发病过程中，但可能是重要的保护免受光生物学损害。我们使用了野油菜黄单胞菌pv，野油菜亲本菌株，单位点转座子插入突变株，和染色体恢复突变株来定义黄单胞菌的生物学作用，虽然黄单胞菌突变株在暴露于紫外光时的存活率与亲本菌株相当;在暴露于光敏剂甲苯胺蓝和可见光后，存活率大大降低。染色体恢复的突变株在这些条件下完全恢复存活。同样地，在高光强度的条件下，黄单胞菌素突变株的附生存活率大大降低，而染色体恢复的突变株的附生存活率与亲本株相当。这些结果进行了讨论，相对于以前的结果，并提出了一个模型的附生生存的X，白菜PV，白菜。
Previous studies have indicated that the yellow pigments (xanthomonadins) produced by phytopathogenic Xanthomonas bacteria are unimportant during pathogenesis but may be important for protection against photobiological damage. We used a Xanthomonas campestris pv, campestris parent strain, single-site transposon insertion mutant strains, and chromosomally restored mutant strains to define the biological role of xanthomonadins, Although xanthomonadin mutant strains were comparable to the parent strain for survival when exposed to UV light; after their exposure to the photosensitizer toluidine blue and visible light, survival was greatly reduced. Chromosomally restored mutant strains were completely restored for survival in these conditions. Likewise, epiphytic survival of a xanthomonadin mutant strain was greatly reduced in conditions of high light intensity, whereas a chromosomally restored mutant strain was comparable to the parent strain for epiphytic survival. These results are discussed with respect to previous results, and a model for epiphytic survival of X, campestris pv, campestris is presented.