Mechanism of calcium signal response to cadmium stress in duckweed

Ren, Qiuting; Xu, Ziyi; Xue, Ying; Yang, Rui; Ma, Xu; Sun, Jinge; Wang, Jing; Lin, Shuo; Wang, Wenqiao; Yang, Lin; Sun, Zhanpeng

doi:10.1080/15592324.2022.2119340

Cited by 12 publications

(11 citation statements)

References 63 publications

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“…In Le. turionifera , Ca influxes through roots and is stored in both fronds and roots, and in exceptional cases it can also be effluxed out of roots ( Ren et al , 2022 ). In contrast, Wolffioideae species have soluble Ca in cell sap and accordingly also cannot store excess Ca in the roots ( Landolt and Kandeler, 1987 ; Appenroth et al , 2017 ); thus Ca and Mg might be lower in Wolffiodeae because they lack roots as a storage organ.…”

Section: Discussionmentioning

confidence: 99%

“…In contrast, Wolffioideae species have soluble Ca in cell sap and accordingly also cannot store excess Ca in the roots ( Landolt and Kandeler, 1987 ; Appenroth et al , 2017 ); thus Ca and Mg might be lower in Wolffiodeae because they lack roots as a storage organ. Given that Ca was kept sufficiently available in our experiment through media refreshes, and rooted duckweeds use their roots as an additional storage compartment ( Ren et al , 2022 ), this might result in overall higher accumulation when compared with their rootless counterparts.…”

Section: Discussionmentioning

confidence: 99%

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The evolution of the duckweed ionome mirrors losses in structural complexity

Smith,

Zhou,

Flis

et al. 2024

Annals of Botany

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Background and Aims The duckweeds (Lemnaceae) consist of 36 species exhibiting impressive phenotypic variation, including the progressive evolutionary loss of a fundamental plant organ, the root. Loss of roots and reduction of vascular tissues in recently derived taxa occur in concert with genome expansions of up to 14-fold. Given the paired loss of roots and reduction in structural complexity in derived taxa, we focus on the evolution of the ionome (whole-plant elemental contents) in the context of these fundamental body plan changes. We expect that progressive vestigiality and eventual loss of roots may have both adaptive and maladaptive consequences which are hitherto unknown. Methods We quantify the ionomes of 34 accessions in 21 species across all duckweed genera, spanning 70 million years in this rapid cycling plant (doubling times are as rapid as ~24 hours (Lam & Michael, 2022)). We relate both micro- and macroevolutionary ionome contrasts to body plan remodelling and show nimble microevolutionary shifts in elemental accumulation and exclusion in novel accessions. Key Results We observe a robust directional trend in calcium and magnesium levels decreasing from the ancestral representative Spirodela genus towards the derived rootless Wolffia, with the latter also accumulating cadmium. We also identify abundant within-species variation and hyperaccumulators of specific elements, with this extensive variation at the fine – as opposed to broad – scale. Conclusions These data underscore the impact of root loss, and reveal the very fine scale of microevolutionary variation in hyperaccumulation and exclusion of a wide range of elements. Broadly, they may point to trade-offs not well recognized in ionomes.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The evolution of the duckweed ionome mirrors losses in structural complexity

Smith,

Zhou,

Flis

et al. 2024

Annals of Botany

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“…The acid ninhydrin mixing method was used to determine the proline (Pro) content [26] . The non-invasive microtomography (NMT) technique was used to determine the ow of calcium ions at the root surface site located 300µm away from the apex of the root tip [27] . Calcium ion content was determined using inductively coupled plasma emission spectroscopy [28] .…”

Section: Analysis Of Physiological Indexmentioning

confidence: 99%

Effects of exogenous calcium and calcium inhibitor on physiological characteristics of winter rape (Brassica rapa) under low temperature stress

Wu,

Pan,

Muhammad

et al. 2024

Preprint

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Low temperature is one of the environmental factors that restrict the growth and geographical distribution of brassica. To investigate the effects of exogenous calcium and calcium inhibitors on the ability of winter rapeseed (Brassica rapa L.) to withstand low temperatures, and its effect on physiological characteristics we used a strong cold-resistant Longyou 7 (L7) and a weak cold-resistant Longyou 99 (L99) cultivar. The seedlings were treated with CaCl2 (20 mmol·L-1) and the calcium inhibitor LaCl3 (10 mmol·L-1) at 0 h, 6 h, 12 h, 24 h and 48 h, the Ca2+ flux and Ca2+ concentration in the roots after 12 h and 24 h of treatment were analyzed, and results after low-temperature treatment, L99 showed Ca2+ efflux with a rate of 30.21 pmol‧cm-2‧s-1, whereas L7 briefly showed efflux then returned to influx. Moreover. our findings illustrate that under low-temperature conditions, the activities of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) were increased by both CK and exogenous CaCl2 treatments. The contents of soluble protein (SP) and proline (Pro) were increased, while the contents of malondialdehyde (MDA) were decreased, resulting in reduced membrane lipid peroxidation. But enzyme activity decreased and MDA content increased following treatment with exogenous LaCl3. The rate of Ca2+ flow showed a higher uptake in L7 roots compared with L99. Calcium ion content in root showed a decrease in ion content in both cultivars after CaCl2 treatment. The results of RNA-seq data revealed that the genes that are differentially expressed in response to low temperatures, hormones, photosystem II, chloroplasts, DNA replication, ribosomal RNA processing, and translation were significantly enriched. This study found significant expression of genes related to cellular signal transduction (MAPK signaling pathway) and material metabolism (nitrogen metabolism, glycerol ester metabolism). The analysis of MAPK signaling pathway and genes in two modules led to the screening of 8 candidate genes related to the regulation of root growth, development and signal transduction.

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“…Furthermore, the Ca 2+ inflow study suggested that Ca 2+ inflow was stable at a slow speed; however, the treatment of Cd changed to high-speed efflux. Additionally, the introduction of exogenous γ-aminobutyric acid (GABA) to duckweed resulted in the stabilization of the Ca 2+ signal, highlighting its significant regulatory function in managing the Ca 2+ signal under Cd-induced stress [ 16 ]. In addition to Cd, cobalt (Co 2+ ) is another metal ion that has a phyto-modulatory effect in duckweed species.…”

Section: Importance Of Duckweed In Physiological Researchmentioning

confidence: 99%

Duckweed: Beyond an Efficient Plant Model System

Thingujam,

Pajerowska-Mukhtar,

Mukhtar

2024

Biomolecules

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Duckweed (Lemnaceae) rises as a crucial model system due to its unique characteristics and wide-ranging utility. The significance of physiological research and phytoremediation highlights the intricate potential of duckweed in the current era of plant biology. Special attention to duckweed has been brought due to its distinctive features of nutrient uptake, ion transport dynamics, detoxification, intricate signaling, and stress tolerance. In addition, duckweed can alleviate environmental pollutants and enhance sustainability by participating in bioremediation processes and wastewater treatment. Furthermore, insights into the genomic complexity of Lemnaceae species and the flourishing field of transgenic development highlight the opportunities for genetic manipulation and biotechnological innovations. Novel methods for the germplasm conservation of duckweed can be adopted to preserve genetic diversity for future research endeavors and breeding programs. This review centers around prospects in duckweed research promoting interdisciplinary collaborations and technological advancements to drive its full potential as a model organism.

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Mechanism of calcium signal response to cadmium stress in duckweed

Cited by 12 publications

References 63 publications

The evolution of the duckweed ionome mirrors losses in structural complexity

The evolution of the duckweed ionome mirrors losses in structural complexity

Effects of exogenous calcium and calcium inhibitor on physiological characteristics of winter rape (Brassica rapa) under low temperature stress

Duckweed: Beyond an Efficient Plant Model System

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