Cell Wall Composition Impacts Structural Characteristics of the Stems and Thereby Biomass Yield

Lozano, Ana; Santiago, Rogelio; Souto, X. Carlos; Barros-Ríos, Jaime; Gómez, Leonardo D.; Malvar, R. A.

doi:10.1021/acs.jafc.2c04380

Cited by 1 publication

(1 citation statement)

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“…Cell walls constitute more than 50% of the weight of dry biomass, which is largely dependent on cell wall components ( López-Malvar et al., 2022 ), being candidates to be contributing, at least in part, to the different phenotypes observed in plants inoculated in low and high-N ( Ballesteros et al., 2021 ). In contrast to the patterns observed in N metabolism and the hormonal pathway, the set of DE genes in the different cell wall-related families did not show a similar regulation of genes between CTN+ vs CTN- and INN- vs CTN- comparisons ( Figure 10 ).…”

Section: Discussionmentioning

confidence: 99%

Dual RNA-seq of maize and H. seropedicae ZAE94 association, in different doses of nitrate, reveals novel insights into Plant-PGPB-environment relationship

Rosman,

Urquiaga,

Thiebaut

et al. 2024

Front. Plant Sci.

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The interactions between plants, beneficial bacteria and their environment are profoundly shaped by various environmental factors, including light, temperature, water availability, and soil quality. Despite efforts to elucidate the molecular mechanisms involved in the association between plants and beneficial bacteria, like Plant Growth-Promoting Bacteria (PGPB), with many studies focusing on the transcriptional reprogramming in the plant, there is no report on the modulation of genetic controls from both plant and associated bacteria standpoints, in response to environment. The main goal of this study was to investigate the relationship between plant-bacteria-environment signaling, using as a model maize plants inoculated with H. seropedicae ZAE94 and cultivated with different doses of N (0.3 and 3 mM). For this purpose, we performed rRNA-depleted RNA-seq to determine the global gene expression of both maize roots and associated H. seropedicae ZAE94. Our results revealed a differential modulation of maize nitrogen metabolism, phytohormone and cell wall responses when associated with H. seropedicae ZAE94 at different N concentrations. In parallel, a modulation of the bacterial metabolism could be observed, by regulating genes involved in transport, secretion system, cell mobility, oxidoreductases, and chemotaxis, when bacteria were associated with maize roots and cultivated at different doses of N. The molecular and phenotypic data of maize plantlets suggested that different doses of N fertilization differentially regulated the beneficial effects of bacterial inoculation, as higher doses (3 mM) favored shoot elongation and lower doses (0.3 mM) favored increase in plant biomass. Our results provide a valuable integrated overview of differentially expressed genes in both maize and associated H. seropedicae ZAE94 in response to different N availability, revealing new insights into pathways involved in grass-PGPB associations.

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Section: Discussionmentioning

confidence: 99%