info:eu-repo/semantics/article
Auxin-cytokinin cross talk in somatic embryogenesis of Coffea canephora
Autor
JOHNY RAFAEL AVILEZ MONTALVO
Ana Odetth Quintana-Escobar
Hugo Alejandro Méndez Hernández
Victor Aguilar-Hernández
Ligia Guadalupe Brito Argáez
ROSA MARIA GALAZ AVALOS
Miguel Angel Uc Chuc
Víctor Manuel Loyola Vargas
Resumen
Cytokinins (CK) are plant growth regulators involved in multiple physiological processes in plants. One less studied aspect is CK homeostasis (HM). The primary genes related to HM are involved in biosynthesis (IPT), degradation (CKX), and signaling (ARR). This paper demonstrates the effect of auxin (Aux) and CK and their cross talk in a Coffea canephora embryogenic system. The transcriptome and RT-qPCR suggest that Aux in pre-treatment represses biosynthesis, degradation, and signal CK genes. However, in the induction, there is an increase of genes implicated in the CK perception/signal, indicating perhaps, as in other species, Aux is repressing CK, and CK are inducing per se genes involved in its HM. This is reflected in the endogenous concentration of CK; pharmacology experiments helped study the effect of each plant growth regulator in our SE system. We conclude that the Aux–CK balance is crucial to directing somatic embryogenesis in C. canephora. © 2022 by the authors.
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