Interactions between sucrose and jasmonate signalling in the response to cold stress

Abstract

Background Jasmonates play an important role in plant stress and defence responses and are also involved in the regulation of anthocyanin synthesis in response to sucrose availability. Here we explore the signalling interactions between sucrose and jasmonates in response to cold stress in Arabidopsis. Results Sucrose and cold treatments increased anthocyanin content additively. Comprehensive profiling of phytohormone contents demonstrated that jasmonates, salicylic acid and abscisic acid contents increased in response to sucrose treatment in plants grown on agar, but remained considerably lower than in plants grown in compost. The gibberellin GA3 accumulated in response to sucrose treatment but only at warm temperature. The role of jasmonate signalling was explored using the jasmonate response mutants jar1–1 and coi1–16. While the jar1–1 mutant lacked jasmonate-isoleucine and jasmonate-leucine, it accumulated 12-oxo-phytodienoic acid at low temperature on agar medium. Altered patterns of abscisic acid accumulation and higher sugar contents were found in the coi1–16 mutant when grown in compost. Both mutants were able to accumulate anthocyanin and to cold acclimate, but the jar-1-1 mutant showed a larger initial drop in whole-rosette photosystem II efficiency upon transfer to low temperature. Conclusions Hormone contents are determined by interactions between temperature and sucrose supply. Some of these effects may be caused indirectly through senescence initiation in response to sucrose availability. During cold stress, the adjustments of hormone contents may compensate for impaired jasmonate signalling, enabling cold acclimation and anthocyanin accumulation in Arabidopsis jasmonate response mutants, e.g. through antagonistic interactions between gibberellin and jasmonate signalling.

The Effect of Low Temperature Stress on the Leaves and MicroRNA Expression of Potato Seedlings

“…The downregulation of stu-novel-miR5125 resulted in the up-regulation of StuABF8011 and StuAAO 3 6826 which were involved in ABA metabolism and promoted the strengthening of ABAdependent signal transduction, thereby improving the ability of potato to resist low temperature stress. This result is consistent with Feng and Wingler (Feng et al, 2019;Wingler et al, 2020).…”

Function and Mechanism of Jasmonic Acid in Plant Responses to Abiotic and Biotic Stresses

“…DELLA proteins can bind to JAZ proteins, leading to the activation of jasmonate-responsive genes. This finding illustrates JA-GA crosstalk under stress conditions [66]. JA-GA antagonistic crosstalk has been examined in Camellia sinensis during herbivore attack.…”

Sugar Signaling During Fruit Ripening

“…It was later established that DELLA proteins, in GA absence, favored anthocyanin accumulation by sequestering the anthocyanin repressors JAZs and MYBL2, allowing the formation of an active MBW complex ( Qi et al., 2014 ; Xie et al., 2016 ). While anthocyanin synthesis by the mechanisms involving JA, GA-DELLA and sugar signaling could be explained as a plant response to abiotic stresses ( Tarkowski and Van den Ende, 2015 ; Zhang Y. et al., 2017 ; Wingler et al., 2020 ), its role in pigment accumulation during fruit ripening still remains to be determined.…”