Inhibition of biphasic ethylene production enhances tolerance to abiotic stress by reducing the accumulation of reactive oxygen species in Nicotiana tabacum

Molecules and Cells
Soo Jin WiKy Young Park

Abstract

Reactive oxygen species (ROS), such as H(2)O(2), are important plant cell signaling molecules involved in responses to biotic and abiotic stresses and in developmental and physiological processes. Despite the well-known physiological functions of ethylene production and stress signaling via ROS during stresses, whether ethylene acts alone or in conjunction with ROS has not yet been fully elucidated. Therefore, we investigated the relationship between ethylene production and ROS accumulation during the response to abiotic stress. We used three independent transgenic tobacco lines, CAS-AS-2, -3 and -4, in which an antisense transcript of the senescence-related ACC synthase (ACS) gene from carnation flower (CARACC, Gen-Bank accession No. M66619) was expressed heterologously. Biphasic ethylene biosynthesis was reduced significantly in these transgenic plants, with or without H(2)O(2) treatment. These plants exhibited significantly reduced H(2)O(2)-induced gene-specific expression of ACS members, which were regulated in a time-dependent manner. The higher levels of NtACS1 expression in wild-type plants led to a second peak in ethylene production, which resulted in a more severe level of necrosis and cell death, as determined by tryp...Continue Reading

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Citations

Jul 15, 2011·Molecular Plant-microbe Interactions : MPMI·Osman RadwanSteven J Clough
Aug 20, 2015·International Journal of Molecular Sciences·Mayank Anand GururaniHanhong Bae
May 23, 2012·Plant Physiology and Biochemistry : PPB·Priscila L GratãoRicardo A Azevedo
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Apr 30, 2021·Chemico-biological Interactions·Nadeem IqbalAttila Ördög
Sep 14, 2018·Journal of Agricultural and Food Chemistry·Gai-Fang YaoHua Zhang

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