کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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2018378 | 1067847 | 2007 | 7 صفحه PDF | دانلود رایگان |

RNA from the aerial parts of 15-day-old eceriferum cer6-2 mutant and control plants were used in microarray experiments to screen for differentially expressed genes. Among those which were down-regulated in the mutant, several were known to be involved in various plant defense mechanisms. The most remarkable difference was measured for the transcripts encoding the pathogenesis-related protein1 (PR-1), which is a marker of the systemic acquired resistance (SAR) pathway, with a 100-fold decrease in the cer6-2 mutant. Further, Q-PCR experiments showed that the PR-1 transcript levels were low in two other eceriferum mutants, representing 1/200th and 1/25th of the normal values in the aerial part of 15-day-old cer2 and cer1-1 mutants, respectively. Interestingly, PR-1 mRNA levels were closed to the normal values in the cer3-1 and cer6-2R mutant, the latter being a plant where the synthesis of the very-long chain fatty acids, which is deficient in the cer6-2 plants, is partially restored. Altogether, these results strongly suggested that the amount of PR1-mRNA was not directly correlated to the amount of epicuticular wax on the leaves, but was rather correlated to the presence or absence of some particular lipid-constituents in the epicuticular wax layer.
Journal: Plant Science - Volume 172, Issue 2, February 2007, Pages 299–305