Plant Physiology Laboratory
Head
- Guillermo Santa-María, PhD - Principal Investigator CONICET. Asocciate Professor UNSAM gsantama@intech.gov.ar
Members
- Jorge Moriconi PhD, Adjunct Research CONICET. Head of practical work UNSAM jmoriconi@intech.gov.ar
- Silvina Mangano PhD, Adjuntc Research CONICET smangano@intech.gov.ar
- Leonardo Gualano, Eng - Doctoral feloww CONICET. Head of practical work UNSAM leo.gualano@intech.gov.ar
Lines of investigation
Modern agriculture requires maintaining, or if possible improving, crop yield, while minimizing the cost and the potential negative impact exerted on ecosystems by some agricultural practices. In this context, the efficient use of resources, most of them non-renewable, is considered a main objective for the improvement of next generation crops. In our laboratory we try to identify traits associated with greater efficiency in the use of nutrients, which may help reduce the use of fertilizers. In particular, we examine large and diverse collections of wheat (Triticum aestivum), previously genotyped, in order to associate valuable phenotypic traits -for the efficiency in the use of phosphorus and potassium- to discrete regions of the genome. Next, we attempt to characterize the physiological and molecular processes that determine these phenotypic traits. Reciprocally, we explore the efficiency of nutrient acquisition and utilization in plants that carry alternative alleles of genes known to have a significant impact on crop performance.
In this line of work, an attempt is made to link the variability in the efficiency of potassium and phosphorus utilization with SNPs (Single Nucleotide Polimorphisms) in bread wheat; for which an association mapping population adequately characterized at the molecular level is used. Surveying such populations requires, previously, the development of appropriate «phenotyping» systems, which has been the subject of work in our laboratory in recent years. It is expected that association mapping will make it possible to link the differences in the efficiency of use of each of these nutrients with defined chromosomal zones and eventually move towards the identification of allelic variants responsible for such differences.
An alternative approach to the one just mentioned is to try to examine the performance of plants that – it is known from previous work – carry different versions of genes that can potentially influence the elemental composition of plants and their ability to produce dry matter (biomass) . The so-called «dwarfism genes» have played a critical role in the increased yield during the green revolution. Our work, together with that of other research groups, has made it possible to propose that such «genes» notably influence the elemental composition of plants and the efficiency with which they acquire potassium and phosphorus and use them. Our current work seeks to explore the mechanisms through which these genes exert their action. This knowledge is expected to allow the design of new allelic variants with potential impact on agriculture.
Publications
Castellano MM, Muñoz A, Okeke I, Novo-Uzal E, Toribio R, Mangano S. The role of the co-chaperone HOP in plant homeostasis during development and stress. Journal of Experimental Botany 75, 14, 4274–4286. 2024. https://doi.org/10.1093/jxb/erae013
Gabay G, Wang H, Zhang J, Moriconi JI, Burguener GF, Gualano LD, Howell T, Lukaszewski A, Staskawicz B, Cho MJ, Tanaka J, Fahima T, Ke H, Dehesh K, Zhang GL, Gou JY, Hamberg M, Santa Maria GE, Dubcovsky J. Dosage differences in 12-OXOPHYTODIENOATE REDUCTASE genes modulate wheat root growth. Nature Communications 14, 539. 2023. https://doi.org/10.1038/s41467-023-36248-y
Santa-María GE, Lavres J, Rubio G. The concept of mineral plant nutrient in the light of evolution. Plant Science 334, 111747. 2023. https://doi.org/10.1016/j.plantsci.2023.111747
Buet A, Luquet M, Santa-María GE, Galatro A. Can NO signaling and its metabolism be used to improve nutrient use efficiency? Toward a research agenda. Frontiers in Plant Science 13, 787594. 2022. https://doi.org/10.3389/fpls.2022.787594
Moriconi JL, Silva M, Zhang J, Tranquilli GE, Santa-María GE. A genome-wide association study unveils key chromosome regions involved in determining sodium accumulation in wheat under conditions of low potassium supply. Journal of Plant Physiology 275, 153739. 2022. https://doi.org/10.1016/j.
Moriconi JI, Silva M, Zhang J, Tranquilli G, Santa-M GE. Corrigendum to “A genome-wide association study unveils key chromosome regions involved in determining sodium accumulation in wheat under conditions of low potassium supply” [J. Plant Physiol. 275 (2022) 153739]. Journal of Plant Physiology 276, 153785. 2022. https://doi.org/10.1016/j.jplph.2022.153785
Cumpa-Velásquez LM, Moriconi JI, Dip DP, Castagno LN, Puig ML, Maiale SJ, Santa María GE, Sannazzaro AI, Estrella MJ. Prospecting phosphate solubilizing bacteria in alkaline-sodic environments reveals intra-specific variability in Pantoea eucalypti affecting nutrient acquisition and rhizobial nodulation in Lotus tenuis. Applied Soil Ecology 168, 104125. 2021. https://doi.org/10.1016/j.
D’Amico I, Silva M , Moriconi JI, Santa-María GE, Bainotti CT, Tabbita F. Grain mineral composition of Argentinean-adapted wheat cultivars: A case study. Crop and Pasture Science 72, 113–124. 2021. https://doi.org/10.1071/CP20380
Gabay G, Zhang J, Burguener GF, Howell T, Wang H, Fahima T, Lukaszewski A, Moriconi JI, Santa Maria GE, Dubcovsky J. Structural rearrangements in wheat (1BS)-rye (1RS) recombinant chromosomes affect gene dosage and roor length. The Plant Genome 2021, e20079. 2021. https://doi.org/10.1002/tpg2.20079
Gualano LA, Moriconi JI, Oliferuk S, Silva M, Tranquilli GE, Santa-María GE. Barley plants carrying the altered function Sln1d allele display modified responses to low phosphorus supply: implications for phosphorus utilisation efficiency. Functional Plant Biology 48, 780-792. 2021. https://doi.org/10.1071/FP19250.
Nieves Cordones M, Rubio F, Santa María GE. Editorial: Nutrient Use-Efficiency in Plants: An Integrative Approach. Frontiers in Plant Science. 11, 623976. 202o. https://doi.org/10.3389/fpls.2020.623976
Oliferuk S, Simontacchi M, Rubio F, Santa-María GE. 2020. Exposure to a natural nitric oxide donor negatively affects the potential influx of rubidium in potassium-starved Arabidopsis plants. Plant Physiol Biochem. 150, 204-208. 2020. https://doi.org/10.1016/j.plaphy.2020.02.043
Howell T, Moriconi JI, Zhao X, Hegarty J, Fahima T, Santa-María GE, Dubcovsky J. A wheat/rye polymorphism affects seminal root length and yield across different irrigation regimes. J Exp Bot. 70: 4027–4037. 2019. https://doi.org/10.1093/jxb/erz169
Moriconi JI, Kotula L, Santa-María GE, Colmer TD. Root phenotypes of dwarf and «overgrowth» SLN1 barley mutants, and implications for hypoxic stress tolerance. J Plant Physiol. 234-235: 60-70. 2019. https://doi.org/10.1016/j.jplph.2019.01.009