Habanero pepper (

Abstract

Drought is one of the major factors limiting global crop yield. In Mexico, agriculture is expected to be severely affected by drought. The Capsicum genus has several crop species of agricultural importance. In this work, we analysed the Capsicum chinense plant physiological responses and differentially expressed genes under water stress mainly focused on the responses elicited following recovery through repetitive stress. Plants were cultivated in an experimental block. Each block consisted of plants under water deficit and a control group without deficit. Morphometric and functional parameters, and the expression of genes related to resistance to abiotic stresses were measured. Morphological differences were observed. Plants subjected to water deficit showed impaired growth. Nonetheless, in the physiological parameters, no differences were observed between treatments. We selected abiotic stress-related genes that include heat-shock proteins (HSPs), heat-shock factors (HSFs), transcription factors related to abiotic stress (MYB, ETR1, and WRKY), and those associated with biotic and abiotic stress responses (Jar1 and Lox2). HSF, HSP, MYB72, ETR1, Jar1, WRKYa, and Lox2 genes were involved in the response to water-deficit stress in C. chinense plants. In conclusion, our work may improve our understanding of the morphological, physiological, and molecular mechanisms underlying hydric stress response in C. chinense.

Lipid peroxidation and stress-induced signalling molecules in systemic resistance mediated by azelaic acid/AZELAIC ACID INDUCED1: signal initiation and propagation

“…The enzyme is involved in many biotic stress responses including priming processes (Losvik et al 2017 ; Rustgi et al 2019 ; Zhao et al 2023 ), as well as drought, cold and salt stress (cf. De Domenico et al 2012 ; Nieto-Garibay et al 2022 ; Liu et al 2017 ; Du et al 2013 ; Shi et al 2022 ). Finally, hydroperoxide lyases catalyse the cleavage of C–C bonds in the hydroperoxides to generate oxylipins, including AZA (Matsui et al 2006 ).…”