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Although a causal connection between the accumulation of chitinase and -1,3-glucanase and systemic protection has not yet been established, the occurrence of high levels of these enzymes in systemically protected tissue suggest their involvement in disease resistance. In fresh apples, the onset of the systemic resistance to B. cinerea closely paralleled the increase in chitinase and -1,3-glucanase activity in systemically protected tissue. These results, which are consistent with the temporal and spatial induction of pathogenesis-related (PR) proteins and likely concomitantly with induced resistance (8,21), show that apple fruit are capable of responding to microbial elicitor treatment as seen in other crops. In several plant–pathogen interactions, the induction and accumulation of PR proteins including chitinase and -1,3-glucanase is often correlated with the onset of induced resistance (12, 17,21,22). Chitinase and -1,3-glucanase hydrolyze fungal cell walls and in combination they have been shown to inhibit the in vitro growth of several pathogenic fungi (18,20). |
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sltmac: 金币+1 2012-06-10 10:03:21
sltmac: 违规存档, 机器翻译 2012-07-24 11:05:35
sltmac: 金币+1 2012-06-10 10:03:21
sltmac: 违规存档, 机器翻译 2012-07-24 11:05:35
| 虽然积累之间的因果关系几丁质酶和-1,3 - 葡聚糖酶和系统性的保护尚未建立，这些酶系统保护组织高水平的发生，表明其在抗病的参与。新鲜的苹果，全身抵抗力灰霉病的发病密切平行的组织系统保护中的几丁质酶和-1,3 - 葡聚糖酶的活性增加。 ，这是一致的病程相关（PR）的蛋白质的时空感应和随之而来可能与诱导抗性（8,21），这些结果表明，苹果果实是能够响应其他作物，微生物诱导子处理。在几种植物鈥损athogen相互作用，诱导和PR蛋白的积累，包括几丁质酶和-1,3 - 葡聚糖酶往往与诱导抗性（12，17,21,22）的发病密切相关。几丁质酶和-1,3 - 葡聚糖酶水解真菌细胞壁和组合，他们已被证明能够抑制在体外对多种病原真菌（18,20）增长。 |
2楼2012-06-10 07:06:21
3楼2012-06-10 09:57:40