1
|
Araujo-León JA, Sánchez-Del Pino I, Ortiz-Andrade R, Hidalgo-Figueroa S, Carrera-Lanestosa A, Brito-Argáez LG, González-Sánchez A, Giácoman-Vallejos G, Hernández-Abreu O, Peraza-Sánchez SR, Xingú-López A, Aguilar-Hernández V. HPLC-Based Metabolomic Analysis and Characterization of Amaranthus cruentus Leaf and Inflorescence Extracts for Their Antidiabetic and Antihypertensive Potential. Molecules 2024; 29:2003. [PMID: 38731493 DOI: 10.3390/molecules29092003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 04/08/2024] [Accepted: 04/24/2024] [Indexed: 05/13/2024] Open
Abstract
The aim of this study was to investigate the potential of Amaranthus cruentus flavonoids (quercetin, kaempferol, catechin, hesperetin, naringenin, hesperidin, and naringin), cinnamic acid derivatives (p-coumaric acid, ferulic acid, and caffeic acid), and benzoic acids (vanillic acid and 4-hydroxybenzoic acid) as antioxidants, antidiabetic, and antihypertensive agents. An analytical method for simultaneous quantification of flavonoids, cinnamic acid derivatives, and benzoic acids for metabolomic analysis of leaves and inflorescences from A. cruentus was developed with HPLC-UV-DAD. Evaluation of linearity, limit of detection, limit of quantitation, precision, and recovery was used to validate the analytical method developed. Maximum total flavonoids contents (5.2 mg/g of lyophilized material) and cinnamic acid derivatives contents (0.6 mg/g of lyophilized material) were found in leaves. Using UV-Vis spectrophotometry, the maximum total betacyanin contents (74.4 mg/g of lyophilized material) and betaxanthin contents (31 mg/g of lyophilized material) were found in inflorescences. The leaf extract showed the highest activity in removing DPPH radicals. In vitro antidiabetic activity of extracts was performed with pancreatic α-glucosidase and intestinal α-amylase, and compared to acarbose. Both extracts exhibited a reduction in enzyme activity from 57 to 74%. Furthermore, the in vivo tests on normoglycemic murine models showed improved glucose homeostasis after sucrose load, which was significantly different from the control. In vitro antihypertensive activity of extracts was performed with angiotensin-converting enzyme and contrasted to captopril; both extracts exhibited a reduction of enzyme activity from 53 to 58%. The leaf extract induced a 45% relaxation in an ex vivo aorta model. In the molecular docking analysis, isoamaranthin and isogomphrenin-I showed predictive binding affinity for α-glucosidases (human maltase-glucoamylase and human sucrase-isomaltase), while catechin displayed binding affinity for human angiotensin-converting enzyme. The data from this study highlights the potential of A. cruentus as a functional food.
Collapse
Affiliation(s)
- Jesús Alfredo Araujo-León
- Unidad de Biología Integrativa, Centro de Investigación Científica de Yucatán (CICY), Mérida 97205, Yucatán, Mexico
| | - Ivonne Sánchez-Del Pino
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán (CICY), Mérida 97205, Yucatán, Mexico
| | - Rolffy Ortiz-Andrade
- Facultad de Química, Universidad Autónoma de Yucatán (UADY), Mérida 97069, Yucatán, Mexico
| | - Sergio Hidalgo-Figueroa
- CONAHCyT-División de Biología Molecular, Instituto Potosino de Investigación Científica y Tecnológica A.C., San Luis Potosí 78216, San Luis Potosí, Mexico
| | - Areli Carrera-Lanestosa
- División Académica de Ciencias Agropecuarias, Universidad Juárez Autónoma de Tabasco (UJAT), Villahermosa 86280, Tabasco, Mexico
| | - Ligia Guadalupe Brito-Argáez
- Unidad de Biología Integrativa, Centro de Investigación Científica de Yucatán (CICY), Mérida 97205, Yucatán, Mexico
| | - Avel González-Sánchez
- Facultad de Ingeniería, Universidad Autónoma de Yucatán (UADY), Mérida 97203, Yucatán, Mexico
| | | | - Oswaldo Hernández-Abreu
- Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco, Universidad Juárez Autónoma de Tabasco (UJAT), Cunduacán 86690, Tabasco, Mexico
| | - Sergio R Peraza-Sánchez
- Unidad de Biotecnología, Centro de Investigación Científica de Yucatán (CICY), Mérida 97205, Yucatán, Mexico
| | - Andrés Xingú-López
- Unidad de Biotecnología, Centro de Investigación Científica de Yucatán (CICY), Mérida 97205, Yucatán, Mexico
| | - Víctor Aguilar-Hernández
- Unidad de Biología Integrativa, Centro de Investigación Científica de Yucatán (CICY), Mérida 97205, Yucatán, Mexico
| |
Collapse
|
2
|
López-García CM, Ávila-Hernández CA, Quintana-Rodríguez E, Aguilar-Hernández V, Lozoya-Pérez NE, Rojas-Raya MA, Molina-Torres J, Araujo-León JA, Brito-Argáez L, González-Sánchez AA, Ramírez-Chávez E, Orona-Tamayo D. Extracellular Self- and Non-Self DNA Involved in Damage Recognition in the Mistletoe Parasitism of Mesquite Trees. Int J Mol Sci 2023; 25:457. [PMID: 38203628 PMCID: PMC10778891 DOI: 10.3390/ijms25010457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 12/16/2023] [Accepted: 12/23/2023] [Indexed: 01/12/2024] Open
Abstract
Psittacanthus calyculatus parasitizes mesquite trees through a specialized structure called a haustorium, which, in the intrusive process, can cause cellular damage in the host tree and release DAMPs, such as ATP, sugars, RNA, and DNA. These are highly conserved molecules that primarily function as signals that trigger and activate the defense responses. In the present study, we generate extracellular DNA (exDNA) from mesquite (P. laevigata) tree leaves (self-exDNA) and P. calyculatus (non-self exDNA) mistletoe as DAMP sources to examine mesquite trees' capacity to identify specific self or non-self exDNA. We determined that mesquite trees perceive self- and non-self exDNA with the synthesis of O2•-, H2O2, flavonoids, ROS-enzymes system, MAPKs activation, spatial concentrations of JA, SA, ABA, and CKs, and auxins. Our data indicate that self and non-self exDNA application differs in oxidative burst, JA signaling, MAPK gene expression, and scavenger systems. This is the first study to examine the molecular biochemistry effects in a host tree using exDNA sources derived from a mistletoe.
Collapse
Affiliation(s)
- Claudia Marina López-García
- Medio Ambiente y Biotecnología, Centro de Innovación Aplicada en Tecnologías Competitivas (CIATEC), León 37545, Guanajuato, Mexico; (C.M.L.-G.)
| | - César Alejandro Ávila-Hernández
- Centro de Investigación y de Estudios Avanzados (CINVESTAV), Instituto Politécnico Nacional, Irapuato 36821, Guanajuato, Mexico; (C.A.Á.-H.); (M.A.R.-R.); (E.R.-C.)
| | - Elizabeth Quintana-Rodríguez
- Medio Ambiente y Biotecnología, Centro de Innovación Aplicada en Tecnologías Competitivas (CIATEC), León 37545, Guanajuato, Mexico; (C.M.L.-G.)
| | - Víctor Aguilar-Hernández
- Unidad de Biología Integrativa, Centro de Investigación Científica de Yucatán (CICY), Mérida 97205, Yucatán, Mexico (J.A.A.-L.)
| | - Nancy Edith Lozoya-Pérez
- Medio Ambiente y Biotecnología, Centro de Innovación Aplicada en Tecnologías Competitivas (CIATEC), León 37545, Guanajuato, Mexico; (C.M.L.-G.)
| | - Mariana Atzhiry Rojas-Raya
- Centro de Investigación y de Estudios Avanzados (CINVESTAV), Instituto Politécnico Nacional, Irapuato 36821, Guanajuato, Mexico; (C.A.Á.-H.); (M.A.R.-R.); (E.R.-C.)
| | - Jorge Molina-Torres
- Centro de Investigación y de Estudios Avanzados (CINVESTAV), Instituto Politécnico Nacional, Irapuato 36821, Guanajuato, Mexico; (C.A.Á.-H.); (M.A.R.-R.); (E.R.-C.)
| | - Jesús Alfredo Araujo-León
- Unidad de Biología Integrativa, Centro de Investigación Científica de Yucatán (CICY), Mérida 97205, Yucatán, Mexico (J.A.A.-L.)
| | - Ligia Brito-Argáez
- Unidad de Biología Integrativa, Centro de Investigación Científica de Yucatán (CICY), Mérida 97205, Yucatán, Mexico (J.A.A.-L.)
| | | | - Enrique Ramírez-Chávez
- Centro de Investigación y de Estudios Avanzados (CINVESTAV), Instituto Politécnico Nacional, Irapuato 36821, Guanajuato, Mexico; (C.A.Á.-H.); (M.A.R.-R.); (E.R.-C.)
| | - Domancar Orona-Tamayo
- Medio Ambiente y Biotecnología, Centro de Innovación Aplicada en Tecnologías Competitivas (CIATEC), León 37545, Guanajuato, Mexico; (C.M.L.-G.)
| |
Collapse
|
3
|
Zárate-López MA, Quintana-Rodríguez E, Orona-Tamayo D, Aguilar-Hernández V, Araujo-León JA, Brito-Argáez L, Molina-Torres J, Hernández-Flores JL, Loyola-Vargas VM, Lozoya-Pérez NE, Lozoya-Gloria E. Metabolic Responses of the Microalga Neochloris oleoabundans to Extracellular Self- and Nonself-DNA. Int J Mol Sci 2023; 24:14172. [PMID: 37762475 PMCID: PMC10531809 DOI: 10.3390/ijms241814172] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 08/24/2023] [Accepted: 08/29/2023] [Indexed: 09/29/2023] Open
Abstract
Stressed organisms identify intracellular molecules released from damaged cells due to trauma or pathogen infection as components of the innate immune response. These molecules called DAMPs (Damage-Associated Molecular Patterns) are extracellular ATP, sugars, and extracellular DNA, among others. Animals and plants can recognize their own DNA applied externally (self-exDNA) as a DAMP with a high degree of specificity. However, little is known about the microalgae responses to damage when exposed to DAMPs and specifically to self-exDNAs. Here we compared the response of the oilseed microalgae Neochloris oleoabundans to self-exDNA, with the stress responses elicited by nonself-exDNA, methyl jasmonate (MeJA) and sodium bicarbonate (NaHCO3). We analyzed the peroxidase enzyme activity related to the production of reactive oxygen species (ROS), as well as the production of polyphenols, lipids, triacylglycerols, and phytohormones. After 5 min of addition, self-exDNA induced peroxidase enzyme activity higher than the other elicitors. Polyphenols and lipids were increased by self-exDNA at 48 and 24 h, respectively. Triacylglycerols were increased with all elicitors from addition and up to 48 h, except with nonself-exDNA. Regarding phytohormones, self-exDNA and MeJA increased gibberellic acid, isopentenyladenine, and benzylaminopurine at 24 h. Results show that Neochloris oleoabundans have self-exDNA specific responses.
Collapse
Affiliation(s)
- Mónica A. Zárate-López
- Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV-IPN), Unidad Irapuato, Km 9.6 Carretera Irapuato-León, Irapuato 36824, Guanajuato, Mexico; (M.A.Z.-L.); (J.M.-T.); (J.L.H.-F.)
- Centro de Innovación Aplicada en Tecnologías Competitivas (CIATEC), Omega # 201 Col. Industrial Delta, León 37545, Guanajuato, Mexico; (D.O.-T.); (N.E.L.-P.)
| | - Elizabeth Quintana-Rodríguez
- Centro de Innovación Aplicada en Tecnologías Competitivas (CIATEC), Omega # 201 Col. Industrial Delta, León 37545, Guanajuato, Mexico; (D.O.-T.); (N.E.L.-P.)
| | - Domancar Orona-Tamayo
- Centro de Innovación Aplicada en Tecnologías Competitivas (CIATEC), Omega # 201 Col. Industrial Delta, León 37545, Guanajuato, Mexico; (D.O.-T.); (N.E.L.-P.)
| | - Víctor Aguilar-Hernández
- Centro de Investigación Científica de Yucatán, A.C. (CICY), Calle 43 # 130, Chuburná de Hidalgo, Mérida 97205, Yucatán, Mexico; (V.A.-H.); (J.A.A.-L.); (L.B.-A.); (V.M.L.-V.)
| | - Jesús A. Araujo-León
- Centro de Investigación Científica de Yucatán, A.C. (CICY), Calle 43 # 130, Chuburná de Hidalgo, Mérida 97205, Yucatán, Mexico; (V.A.-H.); (J.A.A.-L.); (L.B.-A.); (V.M.L.-V.)
| | - Ligia Brito-Argáez
- Centro de Investigación Científica de Yucatán, A.C. (CICY), Calle 43 # 130, Chuburná de Hidalgo, Mérida 97205, Yucatán, Mexico; (V.A.-H.); (J.A.A.-L.); (L.B.-A.); (V.M.L.-V.)
| | - Jorge Molina-Torres
- Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV-IPN), Unidad Irapuato, Km 9.6 Carretera Irapuato-León, Irapuato 36824, Guanajuato, Mexico; (M.A.Z.-L.); (J.M.-T.); (J.L.H.-F.)
| | - José Luis Hernández-Flores
- Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV-IPN), Unidad Irapuato, Km 9.6 Carretera Irapuato-León, Irapuato 36824, Guanajuato, Mexico; (M.A.Z.-L.); (J.M.-T.); (J.L.H.-F.)
| | - Víctor M. Loyola-Vargas
- Centro de Investigación Científica de Yucatán, A.C. (CICY), Calle 43 # 130, Chuburná de Hidalgo, Mérida 97205, Yucatán, Mexico; (V.A.-H.); (J.A.A.-L.); (L.B.-A.); (V.M.L.-V.)
| | - Nancy E. Lozoya-Pérez
- Centro de Innovación Aplicada en Tecnologías Competitivas (CIATEC), Omega # 201 Col. Industrial Delta, León 37545, Guanajuato, Mexico; (D.O.-T.); (N.E.L.-P.)
| | - Edmundo Lozoya-Gloria
- Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV-IPN), Unidad Irapuato, Km 9.6 Carretera Irapuato-León, Irapuato 36824, Guanajuato, Mexico; (M.A.Z.-L.); (J.M.-T.); (J.L.H.-F.)
| |
Collapse
|
4
|
Aguilar-Venegas M, Quintana-Rodríguez E, Aguilar-Hernández V, López-García CM, Conejo-Dávila E, Brito-Argáez L, Loyola-Vargas VM, Vega-Arreguín J, Orona-Tamayo D. Protein Profiling of Psittacanthus calyculatus during Mesquite Infection. Plants (Basel) 2023; 12:464. [PMID: 36771550 PMCID: PMC9920738 DOI: 10.3390/plants12030464] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/13/2023] [Accepted: 01/16/2023] [Indexed: 06/18/2023]
Abstract
Psittacanthus calyculatus is a hemiparasite mistletoe that represents an ecological problem due to the impacts caused to various tree species of ecological and commercial interest. Although the life cycle for the Psittacanthus genus is well established in the literature, the development stages and molecular mechanism implicated in P. calyculatus host infection are poorly understood. In this study, we used a manageable infestation of P. laevigata with P. calyculatus to clearly trace the infection, which allowed us to describe five phenological infective stages of mistletoe on host tree branches: mature seed (T1), holdfast formation (T2), haustorium activation (T3), haustorium penetration (T4), and haustorium connection (T5) with the host tree. Proteomic analyses revealed proteins with a different accumulation and cellular processes in infective stages. Activities of the cell wall-degrading enzymes cellulase and β-1,4-glucosidase were primarily active in haustorium development (T3), while xylanase, endo-glucanase, and peptidase were highly active in the haustorium penetration (T4) and xylem connection (T5). Patterns of auxins and cytokinin showed spatial concentrations in infective stages and moreover were involved in haustorium development. These results are the first evidence of proteins, cell wall-degrading enzymes, and phytohormones that are involved in early infection for the Psittacanthus genus, and thus represent a general infection mechanism for other mistletoe species. These results could help to understand the molecular dialogue in the establishment of P. calyculatus parasitism.
Collapse
Affiliation(s)
- Montserrat Aguilar-Venegas
- Ciencias Agrogenómicas, Escuela Nacional de Estudios Superiores, Unidad León, UNAM, León CP 37684, Guanajuato, Mexico
| | | | - Víctor Aguilar-Hernández
- Unidad de Bioquímica y Biología Molecular de Plantas, CICY, A.C., Mérida CP 97205, Yucatán, Mexico
| | | | - Efraín Conejo-Dávila
- Unidad Profesional Interdisciplinaria de Ingeniería Campus Guanajuato, Instituto Politécnico Nacional, Silao de la Victoria CP 36275, Guanajuato, Mexico
| | - Ligia Brito-Argáez
- Unidad de Bioquímica y Biología Molecular de Plantas, CICY, A.C., Mérida CP 97205, Yucatán, Mexico
| | - Víctor M. Loyola-Vargas
- Unidad de Bioquímica y Biología Molecular de Plantas, CICY, A.C., Mérida CP 97205, Yucatán, Mexico
| | - Julio Vega-Arreguín
- Ciencias Agrogenómicas, Escuela Nacional de Estudios Superiores, Unidad León, UNAM, León CP 37684, Guanajuato, Mexico
| | | |
Collapse
|
5
|
Avilez-Montalvo JR, Quintana-Escobar AO, Méndez-Hernández HA, Aguilar-Hernández V, Brito-Argáez L, Galaz-Ávalos RM, Uc-Chuc MA, Loyola-Vargas VM. Auxin-Cytokinin Cross Talk in Somatic Embryogenesis of Coffea canephora. Plants 2022; 11:plants11152013. [PMID: 35956493 PMCID: PMC9370429 DOI: 10.3390/plants11152013] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 07/01/2022] [Accepted: 07/28/2022] [Indexed: 11/16/2022]
Abstract
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.
Collapse
Affiliation(s)
- Johny R. Avilez-Montalvo
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, Calle 43, No. 130 × 32 y 34, Mérida 97205, Mexico; (J.R.A.-M.); (A.O.Q.-E.); (H.A.M.-H.); (L.B.-A.); (R.M.G.-Á.); (M.A.U.-C.)
| | - Ana O. Quintana-Escobar
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, Calle 43, No. 130 × 32 y 34, Mérida 97205, Mexico; (J.R.A.-M.); (A.O.Q.-E.); (H.A.M.-H.); (L.B.-A.); (R.M.G.-Á.); (M.A.U.-C.)
| | - Hugo A. Méndez-Hernández
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, Calle 43, No. 130 × 32 y 34, Mérida 97205, Mexico; (J.R.A.-M.); (A.O.Q.-E.); (H.A.M.-H.); (L.B.-A.); (R.M.G.-Á.); (M.A.U.-C.)
| | - Víctor Aguilar-Hernández
- Catedrático CONACYT, Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, Mérida 97205, Mexico;
| | - Ligia Brito-Argáez
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, Calle 43, No. 130 × 32 y 34, Mérida 97205, Mexico; (J.R.A.-M.); (A.O.Q.-E.); (H.A.M.-H.); (L.B.-A.); (R.M.G.-Á.); (M.A.U.-C.)
| | - Rosa M. Galaz-Ávalos
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, Calle 43, No. 130 × 32 y 34, Mérida 97205, Mexico; (J.R.A.-M.); (A.O.Q.-E.); (H.A.M.-H.); (L.B.-A.); (R.M.G.-Á.); (M.A.U.-C.)
| | - Miguel A. Uc-Chuc
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, Calle 43, No. 130 × 32 y 34, Mérida 97205, Mexico; (J.R.A.-M.); (A.O.Q.-E.); (H.A.M.-H.); (L.B.-A.); (R.M.G.-Á.); (M.A.U.-C.)
| | - Víctor M. Loyola-Vargas
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, Calle 43, No. 130 × 32 y 34, Mérida 97205, Mexico; (J.R.A.-M.); (A.O.Q.-E.); (H.A.M.-H.); (L.B.-A.); (R.M.G.-Á.); (M.A.U.-C.)
- Correspondence: ; Tel.: +52-999-942-83-30 (ext. 243)
| |
Collapse
|
6
|
Uc-Chuc MA, Pérez-Hernández C, Galaz-Ávalos RM, Brito-Argaez L, Aguilar-Hernández V, Loyola-Vargas VM. YUCCA-Mediated Biosynthesis of the Auxin IAA Is Required during the Somatic Embryogenic Induction Process in Coffea canephora. Int J Mol Sci 2020; 21:E4751. [PMID: 32635392 PMCID: PMC7369726 DOI: 10.3390/ijms21134751] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 06/24/2020] [Accepted: 06/28/2020] [Indexed: 12/24/2022] Open
Abstract
Despite the existence of considerable research on somatic embryogenesis (SE), the molecular mechanism that regulates the biosynthesis of auxins during the SE induction process remains unknown. Indole-3-acetic acid (IAA) is an auxin that is synthesized in plants through five pathways. The biosynthetic pathway most frequently used in this synthesis is the conversion of tryptophan to indol-3-pyruvic acid (IPA) by tryptophan aminotransferase of Arabidopsis (TAA) followed by the conversion of IPA to IAA by enzymes encoded by YUCCA (YUC) genes of the flavin monooxygenase family; however, it is unclear whether YUC-mediated IAA biosynthesis is involved in SE induction. In this study, we report that the increase of IAA observed during SE pre-treatment (plants in MS medium supplemented with 1-naphthaleneacetic acid (NAA) 0.54 µM and kinetin (Kin) 2.32 µM for 14 days) was due to its de novo biosynthesis. By qRT-PCR, we demonstrated that YUC gene expression was consistent with the free IAA signal found in the explants during the induction of SE. In addition, the use of yucasin to inhibit the activity of YUC enzymes reduced the signal of free IAA in the leaf explants and dramatically decreased the induction of SE. The exogenous addition of IAA restored the SE process in explants treated with yucasin. Our findings suggest that the biosynthesis and localization of IAA play an essential role during the induction process of SE in Coffea canephora.
Collapse
Affiliation(s)
- Miguel A. Uc-Chuc
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, A.C. Calle 43 No. 130 × 32 y 344 Col. Chuburná de Hidalgo, Mérida C.P. 97205, Mexico; (M.A.U.-C.); (C.P.-H.); (R.M.G.-Á.); (L.B.-A.)
| | - Cleyre Pérez-Hernández
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, A.C. Calle 43 No. 130 × 32 y 344 Col. Chuburná de Hidalgo, Mérida C.P. 97205, Mexico; (M.A.U.-C.); (C.P.-H.); (R.M.G.-Á.); (L.B.-A.)
| | - Rosa M. Galaz-Ávalos
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, A.C. Calle 43 No. 130 × 32 y 344 Col. Chuburná de Hidalgo, Mérida C.P. 97205, Mexico; (M.A.U.-C.); (C.P.-H.); (R.M.G.-Á.); (L.B.-A.)
| | - Ligia Brito-Argaez
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, A.C. Calle 43 No. 130 × 32 y 344 Col. Chuburná de Hidalgo, Mérida C.P. 97205, Mexico; (M.A.U.-C.); (C.P.-H.); (R.M.G.-Á.); (L.B.-A.)
| | - Víctor Aguilar-Hernández
- Catedrático CONACYT, Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, Mérida C.P. 97205, Mexico;
| | - Víctor M. Loyola-Vargas
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, A.C. Calle 43 No. 130 × 32 y 344 Col. Chuburná de Hidalgo, Mérida C.P. 97205, Mexico; (M.A.U.-C.); (C.P.-H.); (R.M.G.-Á.); (L.B.-A.)
| |
Collapse
|