1
|
Rogo U, Fambrini M, Pugliesi C. Embryo Rescue in Plant Breeding. PLANTS (BASEL, SWITZERLAND) 2023; 12:3106. [PMID: 37687352 PMCID: PMC10489947 DOI: 10.3390/plants12173106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 08/14/2023] [Accepted: 08/19/2023] [Indexed: 09/10/2023]
Abstract
Embryo rescue (ER) techniques are among the oldest and most successful in vitro tissue culture protocols used with plant species. ER refers to a series of methods that promote the development of an immature or lethal embryo into a viable plant. Intraspecific, interspecific, or intergeneric crosses allow the introgression of important alleles of agricultural interest from wild species, such as resistance or tolerance to abiotic and biotic stresses or morphological traits in crops. However, pre-zygotic and post-zygotic reproductive barriers often present challenges in achieving successful hybridization. Pre-zygotic barriers manifest as incompatibility reactions that hinder pollen germination, pollen tube growth, or penetration into the ovule occurring in various tissues, such as the stigma, style, or ovary. To overcome these barriers, several strategies are employed, including cut-style or graft-on-style techniques, the utilization of mixed pollen from distinct species, placenta pollination, and in vitro ovule pollination. On the other hand, post-zygotic barriers act at different tissues and stages ranging from early embryo development to the subsequent growth and reproduction of the offspring. Many crosses among different genera result in embryo abortion due to the failure of endosperm development. In such cases, ER techniques are needed to rescue these hybrids. ER holds great promise for not only facilitating successful crosses but also for obtaining haploids, doubled haploids, and manipulating the ploidy levels for chromosome engineering by monosomic and disomic addition as well substitution lines. Furthermore, ER can be used to shorten the reproductive cycle and for the propagation of rare plants. Additionally, it has been repeatedly used to study the stages of embryonic development, especially in embryo-lethal mutants. The most widely used ER procedure is the culture of immature embryos taken and placed directly on culture media. In certain cases, the in vitro culture of ovule, ovaries or placentas enables the successful development of young embryos from the zygote stage to maturity.
Collapse
Affiliation(s)
| | | | - Claudio Pugliesi
- Department of Agriculture Food and Environment, University of Pisa, Via del Borghetto 80, 56124 Pisa, Italy; (U.R.); (M.F.)
| |
Collapse
|
2
|
Martinez-Rodriguez A, Beltran-Garcia C, Valdez-Salas B, Santacruz-Ruvalcaba F, Di Mascio P, Beltran-Garcia MJ. Micropropagation of Seed-Derived Clonal Lines of the Endangered Agave marmorata Roezl and Their Compatibility with Endophytes. BIOLOGY 2022; 11:biology11101423. [PMID: 36290326 PMCID: PMC9598202 DOI: 10.3390/biology11101423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 09/03/2022] [Accepted: 09/21/2022] [Indexed: 11/29/2022]
Abstract
Simple Summary The wild Agave marmorata Roezl has been classified as an endangered species. Extracting these plants from the forest for commercial purposes and long maturation periods of close to 30 years have contributed to their loss. A. marmorata interacts with pollinators and other Agaves species to maintain genetic variability. Thus, the conservation and restoration of the agave ecosystem is an ecological challenge. Typically, agave micropropagation use meristem or leaves as explants to rapidly produce uniform agave plants in age and size on a large scale leading to homogeneous plantations. However, introducing these clones to the field reduces genetic variability. This study evaluated in vitro micropropagation of A. marmorata from seeds to generate clonal lines. The selected seedlings exhibited variations in multiplication capacity and stable tissue formation. Variations in clonal lines could be exploited to produce high-quality plants with different capacities, such as faster propagation, enhanced stress adaptation, and continued growth under nutrient limitation conditions, consequently maintaining genetic variability. Furthermore, some clonal lines were inoculated with four endophytic bacteria to identify other differences among these plants, including endophyte-host compatibility. Variable responses to inoculation were observed among clonal lines. We found that Achromobacter xylosoxidans was compatible, unlike Enterobacter cloacae which caused plant death. Abstract A. marmorata is the raw material used for tepextate mescal production but is classified as an endangered species. In the present study, we obtain and multiply clonal lines of Agave marmorata Roezl by selecting seedlings derived from seeds. Ten seedlings from two lots of 400 germinated seeds were selected for axillary bud proliferation induced by BAP 5 mg/L in vitamin-free Murashige and Skoog’s medium. Differences in shoot numbers, heights and senescent tissue formation were observed. Notably, the AM32 line formed 84 shoots and presented low senescent tissue after 60 d of culture. We also selected the AM31 and AM33 clonal lines. Four-month shoots were extracted with 80% methanol in water to determine the total content of saponins, flavonoids, and phenolic acids and compare the three clonal lines. Some bioactive molecules were identified using HPLC techniques and MALDI-TOF mass spectrometry none showed significant differences in content. Additionally, plants derived from the clonal lines were inoculated with four endophytic bacteria. Among these, Achromobacter xylosoxidans supported plant growth of AM32. A notable effect of plant death was observed after inoculation with Enterobacter cloacae, an endophyte of A. tequilana. Additionally, Pseudomonas aeruginosa, an endophyte from A. marmorata, reduced biomass. Our results demonstrate the incompatibility of A. marmorata to E. cloacae and specialization between the host plant and its endophytes. The compatibility of the plant-endophyte could be exploited to boost the establishment and stability of mutualisms to benefit plant development, stress tolerance and pathogen resistance. The differences in multiplication capacity, stable tissue formation, and endophyte biotization responses may indicate genetic variability. Clonal selection and micropropagation from seed-derived plants could contribute to conserving the endangered A. marmorata plant for reforestation in their natural habitats, thus, assuring mass propagation for sustainable industrial production of mescal, bioactive compounds, and prebiotics.
Collapse
Affiliation(s)
- America Martinez-Rodriguez
- Engineering Institute, Universidad Autónoma de Baja California, Mexicali 21280, Baja California, Mexico
- Lab 309-E Building, Chemistry Department, Universidad Autónoma de Guadalajara, Zapopan 45129, Jalisco, Mexico
| | - Celia Beltran-Garcia
- Lab 309-E Building, Chemistry Department, Universidad Autónoma de Guadalajara, Zapopan 45129, Jalisco, Mexico
| | - Benjamin Valdez-Salas
- Engineering Institute, Universidad Autónoma de Baja California, Mexicali 21280, Baja California, Mexico
| | - Fernando Santacruz-Ruvalcaba
- Departamento de Producción Agrícola, Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Zapopan 45110, Jalisco, Mexico
| | - Paolo Di Mascio
- Departament of Biochemistry, Institute of Chemistry, University of São Paulo, Sao Paulo 05508-000, Brazil
- Correspondence: (P.D.M.); (M.J.B.-G.)
| | - Miguel J. Beltran-Garcia
- Lab 309-E Building, Chemistry Department, Universidad Autónoma de Guadalajara, Zapopan 45129, Jalisco, Mexico
- Departamento de Biotecnologicas y Ambientales, Universidad Autónoma de Guadalajara, Zapopan 45129, Jalisco, Mexico
- Correspondence: (P.D.M.); (M.J.B.-G.)
| |
Collapse
|
3
|
Pérez-Zavala MDL, Hernández-Arzaba JC, Bideshi DK, Barboza-Corona JE. Agave: a natural renewable resource with multiple applications. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2020; 100:5324-5333. [PMID: 32535922 DOI: 10.1002/jsfa.10586] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 06/04/2020] [Accepted: 06/14/2020] [Indexed: 06/11/2023]
Abstract
Agaves are a group of succulent plants that thrive in arid or semiarid environments. Indeed, genes associated with their resilience are a potential resource for genetic engineering of other agronomically important crops grown in adverse climates. Agave is mainly used for the production of distilled (spirits) and non-distilled alcoholic beverages, including tequila, mezcal, bacanora, raicilla, and pulque, all of which have special connections to Mexican history and culture, and contribute to the Mexican economy. In recent years, there has been growing interest to maximize the use of agave plant materials for other purposes, as the bulk of their biomass pre- and post-production is wasted. In traditional practice, during the passage from fields to factories, only agave cores are used, and the leaves and bagasse are not always harnessed. To place this in perspective, during the period from 2010 to 2019, 2674.7 × 106 L of tequila was produced in Mexico, which required 9 607 400 tons of agave cores. This generated approximately the same amount of leaves and 3 842 960 tons of bagasse. The economic base of agave plants can be expanded if expended biomass could be transformed into products that are useful for applications in food, forage, ensilage, agriculture, medicine, energy, environment, textiles, cosmetics, and esthetics. This review focuses on the current utility of agave plants, as well as our perspective for future studies and uses of this formidable plant. © 2020 Society of Chemical Industry.
Collapse
Affiliation(s)
- Ma de Lourdes Pérez-Zavala
- Universidad Iberoamericana Campus León, León, Mexico
- Universidad de Guanajuato Campus Irapuato-Salamanca, División de Ciencias de la Vida, Departamento de Agronomía, Irapuato, Guanajuato, Mexico
| | | | - Dennis K Bideshi
- Department of Biological Sciences, California Baptist University, Riverside, CA, USA
- Department of Entomology, University of California, Riverside, CA, USA
| | - José E Barboza-Corona
- Universidad de Guanajuato Campus Irapuato-Salamanca, División de Ciencias de la Vida, Posgrado en Biociencias, Irapuato, Guanajuato, Mexico
- Universidad de Guanajuato Campus Irapuato-Salamanca, División de Ciencias de la Vida, Departamento de Agronomía, Irapuato, Guanajuato, Mexico
| |
Collapse
|