Enhanced Stomatal Conductance by a Spontaneous Arabidopsis Tetraploid, Me-0, Results from Increased Stomatal Size and Greater Stomatal Aperture

Monda, Keina; Araki, Hiromitsu; Kuhara, Satoru; Ishigaki, Genki; Akashi, Ryo; Negi, J. D. S.; Kojima, Mikiko; Sakakibara, Hitoshi; Takahashi, Sho; Hashimoto-Sugimoto, Mimi; Gotô, Nobuharu; Iba, Koh

doi:10.1104/pp.15.01450

Cited by 46 publications

(46 citation statements)

References 53 publications

(65 reference statements)

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“…Transcription generally scales with cell size (Zhurinsky et al, 2010;Marguerat and Bähler, 2012); in Arabidopsis, this scaling has been demonstrated for the gene FLOWERING LOCUS C (Ietswaart et al, 2017). It is thus likely that transcriptome size (transcript abundance per cell) is increased in newly formed Arabidopsis autopolyploids, for which cell size is increased (Yu et al, 2009;Li et al, 2012;Tsukaya, 2013;del Pozo and Ramirez-Parra, 2014;Monda et al, 2016), but this has not been measured to date. Aside from mechanisms to scale global transcriptional output to cell size, the effect of autopolyploidy on gene expression in a number of plant species, including Arabidopsis, tends to be modest relative to what is observed in allopolyploids (del Pozo and Ramirez-Parra, 2015;Spoelhof et al, 2017).…”

Section: Two Kinds Of Ploidy Change Occur In Plantsmentioning

confidence: 99%

Ploidy and Size at Multiple Scales in the Arabidopsis Sepal

et al. 2018

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Ploidy and size phenomena are observed to be correlated across several biological scales, from subcellular to organismal. Two kinds of ploidy change can affect plants. Whole-genome multiplication increases ploidy in whole plants and is broadly associated with increases in cell and organism size. Endoreduplication increases ploidy in individual cells. Ploidy increase is strongly correlated with increased cell size and nuclear volume. Here, we investigate scaling relationships between ploidy and size by simultaneously quantifying nuclear size, cell size, and organ size in sepals from an isogenic series of diploid, tetraploid, and octoploid Arabidopsis thaliana plants, each of which contains an internal endopolyploidy series. We find that pavement cell size and transcriptome size increase linearly with whole-organism ploidy, but organ area increases more modestly due to a compensatory decrease in cell number. We observe that cell size and nuclear size are maintained at a constant ratio; the value of this constant is similar in diploid and tetraploid plants and slightly lower in octoploid plants. However, cell size is maintained in a mutant with reduced nuclear size, indicating that cell size is scaled to cell ploidy rather than to nuclear size. These results shed light on how size is regulated in plants and how cells and organisms of differing sizes are generated by ploidy change.

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Section: Two Kinds Of Ploidy Change Occur In Plantsmentioning

confidence: 99%

Ploidy and Size at Multiple Scales in the Arabidopsis Sepal

et al. 2018

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“…; Monda et al . ). Despite their higher pore lengths, the observed maximal stomatal apertures of the tank epiphytes were lower than for the Pitcairnia species with unmodified stomatal morphology.…”

Section: Discussionmentioning

confidence: 97%

Specialized stomatal humidity responses underpin ecological diversity in C3 bromeliads

Males

Griffiths

2017

Plant Cell & Environment

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The Neotropical Bromeliaceae display an extraordinary level of ecological variety, with species differing widely in habit, photosynthetic pathway and growth form. Divergences in stomatal structure and function, hitherto understudied in treatments of bromeliad evolutionary physiology, could have been critical to the generation of variety in ecophysiological strategies among the bromeliads. Because humidity is a key factor in bromeliad niches, we focussed on stomatal responses to vapour pressure deficit (VPD). We measured the sensitivity of stomatal conductance and assimilation rate to VPD in eight C 3 bromeliad species of contrasting growth forms and ecophysiological strategies and parameterised the kinetics of stomatal responses to a step change in VPD. Notably, three tankepiphyte species displayed low conductance, high sensitivity and fast kinetics relative to the lithophytes, while three xeromorphic terrestrial species showed high conductance and sensitivity but slow stomatal kinetics. An apparent feedforward response of transpiration to VPD occurred in the tank epiphytes, while water-use efficiency was differentially impacted by stomatal closure depending on photosynthetic responses. Differences in stomatal responses to VPD between species of different ecophysiological strategies are closely linked to modifications of stomatal morphology, which we argue has been a pivotal component of the evolution of high diversity in this important plant family.

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“…; Monda et al . ). In C. ruber , the higher frequency of larger stomata in HD than LD leaves is in agreement with earlier observations that larger stomata develop in leaves covered with dust (Sett ).…”

Section: Discussionmentioning

confidence: 99%

Dust accumulation due to anthropogenic impact induces anatomical and photochemical changes in leaves of Centranthus ruber growing on the slope of the Vesuvius volcano

et al. 2019

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In Mediterranean ecosystems, some natural areas are exposed to severe anthropogenic impact. Especially in summer, the considerable number of tourists visiting such areas, often with vehicles, causes deposition of dust over the vegetation due to formation of powder clouds, also favoured by wind erosion, high temperature, low precipitation and incoherent soil structure. The main aim of this study was to analyse whether the deposition of dust can induce changes in leaf anatomical functional traits and in the efficiency of photosynthetic apparatus in Centranthus ruber, a species widespread in Mediterranean ecosystems.• Leaf morpho-functional traits were quantified in plants growing at sites characterised by high (HD) and low (LD) dust deposition, in periods with high anthropogenic impact. Analyses included quantification of chlorophyll fluorescence emission parameters, photosynthetic pigment concentration as well as stomatal size and frequency, leaf lamina thickness, quantification of intercellular spaces and phenolics in the mesophyll through microscopy.• The overall analysis suggested that the different conditions of dust deposition induced different adjustment of morpho-functional traits in leaves of C. ruber. High dust deposition shielded the leaf lamina, protecting the photosynthetic apparatus from excess light and favoured plant photochemical efficiency. Leaves exposed to low dust deposition showed higher accumulation of phenolic compounds, protecting chloroplast membranes and characterised by high thermal dissipation of excess light.• Such adaptive phenomena can affect vegetation dynamics due to possible different species-specific plant responses, resulting in different plant competitiveness under the limiting conditions of Mediterranean environments.Plant Biology 22 (Suppl. 1) (2020) 93-102

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Enhanced Stomatal Conductance by a Spontaneous Arabidopsis Tetraploid, Me-0, Results from Increased Stomatal Size and Greater Stomatal Aperture

Cited by 46 publications

References 53 publications

Ploidy and Size at Multiple Scales in the Arabidopsis Sepal

Ploidy and Size at Multiple Scales in the Arabidopsis Sepal

Specialized stomatal humidity responses underpin ecological diversity in C3 bromeliads

Dust accumulation due to anthropogenic impact induces anatomical and photochemical changes in leaves of Centranthus ruber growing on the slope of the Vesuvius volcano

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