Resistance and biomass in Arabidopsis: a new model for Salicylic Acid perception

被引：47

作者：

Canet, Juan V. ^{[1
]}

Dobon, Albor ^{[1
]}

Ibanez, Federico ^{[1
]}

Perales, Lorena ^{[1
]}

Tornero, Pablo ^{[1
]}

机构：

[1] UPV CSIC, Inst Biol Mol & Celular Plantas, Valencia, Spain

来源：

PLANT BIOTECHNOLOGY JOURNAL | 2010年 / 8卷 / 02期

关键词：

salicylic acid; BTH; NIP1; AXR3; Arabidopsis; SYSTEMIC ACQUIRED-RESISTANCE; RECOMBINANT INBRED LINES; PLANT-DISEASE RESISTANCE; TRANSCRIPTION FACTORS; DEFENSE RESPONSES; NATURAL VARIATION; FITNESS COSTS; NPR1; GENE; THALIANA;

D O I：

10.1111/j.1467-7652.2009.00468.x

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Salicylic acid (SA) is an essential hormone for plant defence and development SA perception is usually measured by counting the number of pathogens that grow in planta upon an exogenous application of the hormone. A biological SA perception model based on plant fresh weight reduction caused by disease resistance in Arabidopsis thaliana is proposed This effect is more noticeable when a chemical analogue of SA is used, like Benzothiadiazole (BTH) By spraying BTH several times, a Substantial difference in plant biomass is observed when compared with the mock treatment Such difference is dose-dependent and does not require pathogen inoculation The model is robust and allows for the comparison of different Arabidopsis ecotypes, recombinant inbreed lines, and mutants Our results show that two mutants, non-expresser of pathogenesis-related genes 1 (npr1) and auxin resistant 3 (axr3), fail to lose biomass when BTH is applied to them Further experiments show that axr3 responds to SA and BTH in terms of defence induction. NPR1-related genotypes also confirm the pivotal role of NPR1 in SA perception, and suggest an active program of depletion of resources in the infected tissues

引用

页码：126 / 141

页数：16

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