期刊
PLANT SCIENCE
卷 320, 期 -, 页码 -出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.plantsci.2022.111279
关键词
Flowering; Chenopodium ficifolium; Transcriptome; Abscisic acid; Jasmonic acid; Salicylic acid
资金
- Czech Science Foundation [19-01639S]
- European Regional Development Fund-Project Centre for Experimental Plant Biology [CZ.02.1.01/0.0/0.0/16_019/0000738]
The study investigated the floral induction process in Chenopodium ficifolium and found that high levels of stress-related phytohormones and the expression of oxidative stress genes were increased under long photoperiods. However, this did not affect plant growth and flowering. The stimulation of cytokinin and gibberellic acid signaling pathways under short days may indicate their involvement in floral initiation, while the accumulation of auxin metabolites suggests the presence of a regulatory network.
The survival and adaptation of angiosperms depends on the proper timing of flowering. The weedy species Chenopodium ficifolium serves as a useful diploid model for comparing the transition to flowering with the important tetraploid crop Chenopodium quinoa due to the close phylogenetic relationship. The detailed transcriptomic and hormonomic study of the floral induction was performed in the short-day accession C. ficifolium 459. The plants grew more rapidly under long days but flowered later than under short days. The high levels of abscisic, jasmonic, and salicylic acids at long days were accompanied by the elevated expression of the genes responding to oxidative stress. The increased concentrations of stress-related phytohormones neither inhibited the plant growth nor accelerated flowering in C. ficifolium 459 at long photoperiods. Enhanced content of cytokinins and the stimulation of cytokinin and gibberellic acid signaling pathways under short days may indicate the possible participation of these phytohormones in floral initiation. The accumulation of auxin metabolites suggests the presence of a dynamic regulatory network in C. ficifolium 459.
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