Habanero pepper (Capsicum chinense) adaptation to water-deficit stress in a protected agricultural system
Alejandra Nieto-Garibay A , Aarón Barraza B , Goretty Caamal-Chan B , Bernardo Murillo-Amador A , Enrique Troyo-Diéguez A , Carlos Alexis Burgoa-Cruz C , Jhesy Nury Jaramillo-Limón D and Abraham Loera-Muro
B *
+ Author Affiliations
- Author Affiliations
A Centro de Investigaciones Biológicas del Noroeste, SC, Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, C.P. 23096, La Paz, Baja California Sur, Mexico.
B CONACYT-Centro de Investigaciones Biológicas del Noroeste, SC, Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, Baja California Sur, C.P. 23096, Mexico.
C Instituto Tecnológico de La Paz, Boulevard Forjadores de Baja California Sur 4720, 8 de Octubre 2da Secc, La Paz, Baja California Sur, C.P. 23080, Mexico.
D Universidad de Occidente, Unidad los Mochis Boulevard Macario Gaxiola SN Col. Las Malvinas, C.P. 81216, Los Mochis, Sinaloa, Mexico.
Functional Plant Biology 49(3) 295-306 https://doi.org/10.1071/FP20394
Submitted: 17 December 2020 Accepted: 11 January 2022 Published: 8 February 2022
© 2022 The Author(s) (or their employer(s)). Published by CSIRO Publishing
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.
Keywords: abiotic stress, abiotic stress-related genes, Capsicum chinense, drought, heat shock factor, heat shock protein, protected agricultural system, water-deficit stress.
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