Prof. Dr. Jörg Fromm

@article{b10e2e2e7812490a80c3d0c06fec8e0e,

title = "When Genetic Diversity Is Low: The Effects of Ploidy Level on Plant Functional Trait Expression in Spartina Under Global Change",

abstract = "Whole genome duplication (WGD or polyploidization) events shape plant evolution, altering ecological responses and plant traits, particularly those related to cell and tissue size. We studied genetic diversity and phenotypic plasticity in Spartina populations, focusing on hybrid ( Spartina × townsendii) and allopolyploid ( S. anglica) cytotypes in Wadden Sea salt marshes. Our results reveal low genetic diversity in both cytotypes and a complex response of plant traits to global change factors (drought, elevated CO 2 concentration). While WGD increased stomatal length, plasticity varied between cytotypes, with allopolyploids showing higher plasticity, especially under elevated CO 2. Biomass allocation patterns differed between cytotypes under global change conditions, suggesting distinct effects on ecosystem functioning, such as belowground carbon sequestration and cycling. The allopolyploid's comparatively fewer, larger-diameter stems may affect aboveground ecosystem functions differently, including sediment trapping and the slowing of tidal currents. Despite similar genetic backgrounds, allopolyploids did not consistently exhibit higher plasticity, challenging previous assumptions. Our findings highlight the complex interplay between hybridization, WGD, phenotypic plasticity, and ecosystem responses to global change, emphasizing the importance of considering polyploidization in understanding plant adaptation and evolutionary dynamics. ",

author = "Dirk Granse and Paul Wendt and Sigrid Suchrow and Dieter Hanelt and J{\"o}rg-Helmut Fromm and Morgane Milin and Oscar Lima and Armel Salmon and Malika Ainouche and Kai Jensen",

year = "2025",

month = mar,

day = "1",

doi = "10.1002/ece3.71022",

language = "English",

volume = "15",

journal = "Ecology and evolution",

issn = "2045-7758",

publisher = "John Wiley and Sons Ltd",

number = "3",

@article{4719aae048b24437ba608def901fb6b4,

title = "Phytolith assemblages from palm leaves and palm-leaf manuscripts: what is the difference and what it could mean?",

abstract = "We studied freshly collected, dried and herbarized leaf fragments of two palms, namely Borassus flabellifer L. and Corypha umbraculifera L., most commonly used for palm-leaf manuscript (PLM) production in South (S) and Southeast Asia (SE) in order to reveal differences in their phytolith assemblages. For each of the two palms, 25 leaf samples were taken from the two Indian states of Kerala and Tamil Nadu. Dried leaf material was obtained from the fresh one by drying the leaves in air. Herbarium samples were obtained from two independent herbaria, specimen origin comprises S and SE Asia with the main focus on South India and Sri Lanka. Additionally, 25 manuscripts made of Borassus flabellifer leaves and 25 manuscripts made of Corypha umbraculifera leaves were investigated for phytoliths. All manuscripts are preliminary dated back to between the 16th and the beginning of the 20th century CE; most of them assumedly were produced in S India (Tamil Nadu and Kerala), Sri Lanka, Burma or Indonesia. Phytolith assemblages significantly differed between fresh, dry and herbarized palm leaves in comparison to PLM material, both qualitatively and quantitatively (mean r2 = - 0.61 ± 9.3 for Borassus samples and r2 = - 0.75 ± 5.3 for Corypha samples, at p < 0.001). Fifty-three phytolith types described for PLM material were not observed in any of the fresh, dry or herbarized palm-leaf samples. Geographical analysis of PLM-specific phytoliths suggests that the combination of those phytoliths could be region-related. In this paper, we prove that the methods of palaeoecological reconstructions based on detailed microscopy of the PLMs surface and phytolith analysis applied in combination with methods of mathematical and computer data analysis can contribute to answer the questions posed by material codicology by revealing lost manuscript production recipes and by studying manuscript provenance in terms of the geographical origin of the artefacts. Our approach can potentially open a new perspective for palaeoecological studies expanding their traditional scope and making them applicable to a new research field.",

keywords = "Arecaceae, material codicology, palaeoecology, palm-leaf manuscripts, phytoliths",

author = "Anastasia Poliakova and Giovanni Ciotti and Agnieszka Helman-Wazny and J{\"o}rg-Helmut Fromm",

year = "2024",

doi = "10.3389/fpls.2024.1482790",

language = "English",

volume = "15",

journal = "Frontiers in Plant Science",

issn = "1664-462X",

publisher = "Frontiers Media S. A.",

@article{59e47a122e8342d0b1a59fc845b72892,

title = "Klimawandel und Lebensmittel‐Auswirkungen erh{\"o}hter CO2‐Konzentrationen und Trockenstress auf das metabolische Profil von Sojabohnen",

author = "Marina Creydt and {Da Silva Costa}, Layssa and J{\"o}rg-Helmut Fromm and Markus Fischer",

year = "2023",

language = "Deutsch",

volume = "77",

pages = "S3--52",

journal = "Lebensmittelchemie",

issn = "0937-1478",

publisher = "Wiley-VCH Verlag",

@article{dcca1fe5e22d461e80ba16db5637fdd1,

title = "Effect of Elevated CO2 and Drought on Biomass, Gas Exchange and Wood Structure of Eucalyptus grandis",

abstract = "Juvenile Eucalyptus grandis were exposed to drought and elevated CO2 to evaluate the independent and interactive effects on growth, gas exchange and wood structure. Trees were grown in a greenhouse at ambient and elevated CO2 (aCO2, 410 ppm; eCO2, 950 ppm), in combination with daily irrigation and cyclic drought during one growing season. The results demonstrated that drought stress limited intercellular CO2 concentration, photosynthesis, stomatal conductance, and transpiration, which correlated with a lower increment in height, stem diameter and biomass. Drought also induced formation of frequent and narrow vessels accompanied by a reduction in vessel lumen area. Conversely, elevated CO2 increased intercellular CO2 concentration as well as photosynthesis, and partially closed stomata, leading to a more efficient water use, especially under drought. There was a clear trend towards greater biomass accumulation at eCO2, although the results did not show statistical significance for this parameter. We observed an increase in vessel diameter and vessel lumen area at eCO2, and, contrarily, the vessel frequency decreased. Thus, we conclude that eCO2 delayed the effects of drought and potentialized growth. However, results on vessel anatomy suggest that increasing vulnerability to cavitation due to formation of larger vessels may counteract the beneficial effects of eCO2 under severe drought.",

keywords = "Eucalyptus, vessel formation, drought stress, elevated carbon dioxide, hydraulic architecture, gas exchange, climate change",

author = "Costa, {Layssa da Silva} and Jasmin Vuralhan-Eckert and J{\"o}rg Fromm",

year = "2022",

month = dec,

day = "28",

doi = "10.3390/plants12010148",

language = "English",

volume = "12",

journal = "Plants",

issn = "2223-7747",

publisher = "MDPI",

number = "1",

@article{c0a69865afa64fa98482b27fd62c4245,

title = "Wood profiling by non-targeted liquid chromatography high-resolution mass spectrometry: Part 2, Detection of the geographical origin of spruce wood (Picea abies) by determination of metabolite pattern",

abstract = "A non-targeted metabolomics-based approach using liquid chromatography high-resolution mass spectrometry was used to authenticate spruce wood (Picea abies) from two geographic source areas. The two sample sites were located in Germany and only 250 km apart. In order to achieve the highest possible metabolite coverage, the spruces samples were measured with four different methods using liquid chromatography high-resolution mass spectrometry. In this way, a total of approximately 4,100 features were detected, which included non-polar, polar, and intermediate-polar metabolites. Using supervised multivariate methods, a distinction between the two sample groups could be achieved on the basis of non-polar data sets. The major metabolites contributing to differentiation were identified by MS/MS experiments and were from the following classes of compounds: ceramides, fatty acids, glycerolipids, and phytosterols. Based on the soil descriptions of the two sites, it was concluded that there is probably a close relationship between nutrient availability and the differences in concentration of the marker compounds. The results show that a metabolomics-based approach is also suitable for differentiation of origin, even if the sample sites are close to each other. ",

keywords = "Ancient artefacts, Geographical origin, Illegal logging, Metabolomics, Non-targeted analysis, Wood",

author = "Marina Creydt and Silke Lautner and J{\"o}rg-Helmut Fromm and Markus Fischer",

year = "2022",

month = jan,

day = "25",

doi = "10.1016/j.chroma.2021.462737",

language = "English",

volume = "1663",

journal = "Journal of Chromatography A",

issn = "0021-9673",

publisher = "Elsevier BV",

@article{f274285aec5e4f2d8cea03f0cb76b7f9,

title = "Wood profiling - detection of the geographical origin of wood by non-targeted liquid chromatography high-resolution mass spectrometry",

author = "Marina Creydt and Lea Ludwig and Michael K{\"o}hl and Silke Lautner and J{\"o}rg-Helmut Fromm and Markus Fischer",

year = "2022",

language = "English",

volume = "9",

pages = "42--44",

journal = "Chrom & Food Forum - Moderne Methoden, aktuelle Trends",

@article{71ea683e6ef847d294304df02573bde8,

title = "Under salt stress guard cells rewire ion transport and abscisic acid signaling",

abstract = "Soil salinity is an increasingly global problem which hampers plant growth and crop yield. Plant productivity depends on optimal water-use efficiency and photosynthetic capacity balanced by stomatal conductance. Whether and how stomatal behavior contributes to salt sensitivity or tolerance is currently unknown. This work identifies guard cell-specific signaling networks exerted by a salt-sensitive and salt-tolerant plant under ionic and osmotic stress conditions accompanied by increasing NaCl loads. We challenged soil-grown Arabidopsis thaliana and Thellungiella salsuginea plants with short- and long-term salinity stress and monitored genome-wide gene expression and signals of guard cells that determine their function. Arabidopsis plants suffered from both salt regimes and showed reduced stomatal conductance while Thellungiella displayed no obvious stress symptoms. The salt-dependent gene expression changes of guard cells supported the ability of the halophyte to maintain high potassium to sodium ratios and to attenuate the abscisic acid (ABA) signaling pathway which the glycophyte kept activated despite fading ABA concentrations. Our study shows that salinity stress and even the different tolerances are manifested on a single cell level. Halophytic guard cells are less sensitive than glycophytic guard cells, providing opportunities to manipulate stomatal behavior and improve plant productivity.",

keywords = "abscisic acid (ABA), glycophyte Arabidopsis, guard cell, halophyte Thellungiella/Eutrema, ion transport, salt stress, soil, stomata",

author = "Karimi, {Sohail M.} and Matthias Freund and Wager, {Brittney M.} and Michael Knoblauch and J{\"o}rg Fromm and {M. Mueller}, Heike and Peter Ache and Markus Krischke and Mueller, {Martin J.} and Tobias M{\"u}ller and Marcus Dittrich and Geilfus, {Christoph Martin} and Alfarhan, {Ahmed H.} and Rainer Hedrich and Rosalia Deeken",

note = "Publisher Copyright: {\textcopyright} 2021 The Authors. New Phytologist {\textcopyright} 2021 New Phytologist Foundation",

year = "2021",

month = aug,

doi = "10.1111/nph.17376",

language = "English",

volume = "231",

pages = "1040--1055",

journal = "New phytologist",

issn = "0028-646X",

publisher = "Wiley-Blackwell",

number = "3",