Hormone profiling and heat-induced tolerance to cold stress in citrus fruit

The involvement of jasmonic acid (JA), different JA-related metabolites, salicylic acid (SA), indole-3-acetic acid (IAA) and abscisic acid (ABA) in the heat-induced cross-adaptation to chilling has been investigated in citrus fruit. The effects of heating ‘Fortune’ mandarins at 37 ºC, and storing them at a chilling temperature (2 ºC) after being exposed, or not, to a heat-conditioning treatment (3 d at 37 ºC) on the levels of these signalling molecules were examined. Jasmonate metabolism activation at 37 ºC was followed by that of SA, and then by a rise in IAA and a drop in ABA. Storage at 2 ºC transiently increased the contents of IAA, of the JA precursor, cis-(+)− 12-oxo-phytodienoic acid (OPDA), and of the JA-derivatives jasmonoyl-isoleucine (JAIle) and methyl jasmonate (MeJA), and decreased ABA in the non-conditioned fruit. The results also indicated that fruit were protected from developing chilling symptoms by virtue of the heat-conditioning treatment having higher JAIle levels than the non-conditioned fruit for very long cold storage periods, while the heat-induced rises in SA, OPDA and MeJA noted in the cold-stored fruit were transient.

Bibliographic Details

Main Authors:	Lafuente, María Teresa, Romero, Paco
Other Authors:	CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI)
Format:	artículo biblioteca
Language:	English
Published:	Elsevier 2022-09-02
Subjects:	Chilling, Indole-3-acetic acid, Cis-(+)−12-Oxo-phytodienoic acid, Jasmonic acid, Jasmonoyl-isoleucine, Methyl jasmonate, Salicylic acid,
Online Access:	http://hdl.handle.net/10261/280923 http://dx.doi.org/10.13039/501100000780 https://api.elsevier.com/content/abstract/scopus_id/85137019989
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