Carbonic anhydrases CA1 and CA4 function in atmospheric CO2 -modulated disease resistance

Planta
Yeling ZhouSaskia C M Van Wees

Abstract

Carbonic anhydrases CA1 and CA4 attenuate plant immunity and can contribute to altered disease resistance levels in response to changing atmospheric CO2 conditions. β-Carbonic anhydrases (CAs) play an important role in CO2 metabolism and plant development, but have also been implicated in plant immunity. Here we show that the bacterial pathogen Pseudomonas syringae and application of the microbe-associated molecular pattern (MAMP) flg22 repress CA1 and CA4 gene expression in Arabidopsis thaliana. Using the CA double-mutant ca1ca4, we provide evidence that CA1 and CA4 play an attenuating role in pathogen- and flg22-triggered immune responses. In line with this, ca1ca4 plants exhibited enhanced resistance against P. syringae, which was accompanied by an increased expression of the defense-related genes FRK1 and ICS1. Under low atmospheric CO2 conditions (150 ppm), when CA activity is typically low, the levels of CA1 transcription and resistance to P. syringae in wild-type Col-0 were similar to those observed in ca1ca4. However, under ambient (400 ppm) and elevated (800 ppm) atmospheric CO2 conditions, CA1 transcription was enhanced and resistance to P. syringae reduced. Together, these results suggest that CA1 and CA4 attenuate p...Continue Reading

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Citations

Jan 18, 2021·Current Opinion in Plant Biology·Jong Hum KimSheng Yang He
Dec 9, 2020·Plant Science : an International Journal of Experimental Plant Biology·Qingyuan XiangSixue Chen
May 1, 2021·International Journal of Molecular Sciences·Kai-Ting FanYet-Ran Chen

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