Abstract：
:Salicylic acid (SA), produced by plants as a signal in defense against pathogens, induces metabolic heating mediated by alternative respiration in flowers of thermogenic plants, and, when exogenously applied, increases leaf temperature in nonthermogenic plants. We have postulated that the latter phenomenon would be detectable when SA is synthesized locally in plant leaves. Here, resistance to tobacco mosaic virus (TMV) was monitored thermographically before any disease symptoms became visible on tobacco leaves. Spots of elevated temperature that were confined to the place of infection increased in intensity from 8 h before the onset of visible cell death, and remained detectable as a halo around the ongoing necrosis. Salicylic acid accumulates during the prenecrotic phase in TMV-infected tobacco and is known to induce stomatal closure in certain species. We show that the time course of SA accumulation correlates with the evolution of both localized thermal effect and stomatal closure. Since the contribution of leaf respiration is marginal, we concluded that the thermal effect results predominantly from localized, SA-induced stomatal closure. The presymptomatic temperature increase could be of general significance in incompatible plant-pathogen interactions.
journal_name
Nat Biotechnoljournal_title
Nature biotechnologyauthors
Chaerle L,Van Caeneghem W,Messens E,Lambers H,Van Montagu M,Van Der Straeten Ddoi
10.1038/11765subject
Has Abstractpub_date
1999-08-01 00:00:00pages
813-6issue
8eissn
1087-0156issn
1546-1696journal_volume
17pub_type
杂志文章abstract：:Whole-genome mRNA quantitation can be used to identify the genes that are most responsive to environmental or genotypic change. By searching for mutually similar DNA elements among the upstream non-coding DNA sequences of these genes, we can identify candidate regulatory motifs and corresponding candidate sets of core...
journal_title：Nature biotechnology
pub_type： 杂志文章
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pub_type： 杂志文章,评审
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更新日期：1999-02-01 00:00:00
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更新日期：2013-11-01 00:00:00
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更新日期：2002-09-01 00:00:00
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更新日期：2020-03-01 00:00:00
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更新日期：2010-06-01 00:00:00
