Advanced vascular function discovered in a widespread moss

  title={Advanced vascular function discovered in a widespread moss},
  author={Timothy J. Brodribb and Marc Carriqu{\'i} and Sylvain Delzon and S. A. M. McAdam and N. Michele Holbrook},
  journal={Nature Plants},
The evolution of terrestrial plants capable of growing upwards into the dry atmosphere profoundly transformed the Earth. A transition from small, ‘non-vascular’ bryophytes to arborescent vascular plants during the Devonian period is partially attributed to the evolutionary innovation of an internal vascular system capable of functioning under the substantial water tension associated with vascular water transport. Here, we show that vascular function in one of the most widespread living… 

Stomata: the holey grail of plant evolution.

The greatest cost associated with terrestrial photosynthesis is maintaining hydration in the presence of phenomenal evaporative forces from the atmosphere (Wong et al., 1979). Without the capacity to

Deep origin and gradual evolution of transporting tissues: Perspectives from across the land plants

Improved knowledge of the intimate structure and developmental regulation of transporting tissue across the entire taxonomic breadth of extant plant lineages is required for a full understanding of the evolutionary trajectory of transporting tissues.

Water‐related innovations in land plants evolved by different patterns of gene cooption and novelty

It is shown that novel genes in the first land plants led to the single origin of stomata, but the stomatal closure of seed plants resulted from later gene expansions, suggesting that gene expansion and cooption are the most common mechanisms of biological innovation in plant evolutionary history.

What drives photosynthesis during desiccation? Mosses and other outliers from the photosynthesis-elasticity trade-off.

Structural features and hydric strategy are discussed as a possible explanation of the desertion of these species from the An-ε trade-off as well as for the general linear dependency between ε and full cessation of An during desiccation.

500 million years of charted territory: functional ecological traits in bryophytes

Since the late Cambrian era, bryophytes have been shaping terrestrial ecosystems through unique and diverse suites of anatomical, physiological, and morphological traits. In this review we highlight

Does the Removal of Non-Photosynthetic Sections Lead to a Down-Regulation of Photosynthesis in Mosses? A First Experiment

ABSTRACT When measuring photosynthesis in mosses, the non-photosynthetic (brown) sections are usually removed and only the green sections are measured. However, how this pretreatment affects

Hydraulic architecture with high root-resistance fraction contributes to efficient carbon gain of plants in temperate habitats.

The results suggest that the hydraulic architecture of plants growing in mesic and fertile habitats not only results in high root resistance due to small biomass partitioning to root organs, but contributes to efficient carbon gain.

Different Metabolic Roles for Alternative Oxidase in Leaves of Palustrine and Terrestrial Species

The alternative oxidase pathway (AOP) is associated with excess energy dissipation in leaves of terrestrial plants. To address whether this association is less important in palustrine plants, we



Anatomical constraints to nonstomatal diffusion conductance and photosynthesis in lycophytes and bryophytes.

It is concluded that the reason why bryophytes lie at the lower end of the leaf economics spectrum is their strong nonstomatal diffusion conductance limitation to photosynthesis, which is driven by their specific anatomical characteristics.

Leaf Maximum Photosynthetic Rate and Venation Are Linked by Hydraulics1[W][OA]

Sampling 43 species across the breadth of plant diversity from mosses to flowering plants, it was found that the post-vein traverse as determined by characters such as vein density, leaf thickness, and cell shape was strongly correlated with the hydraulic conductivity and maximum photosynthetic rate of foliage.

Convergence of ecophysiological traits drives floristic composition of early lineage vascular plants in a tropical forest floor.

The ecophysiology of two early lineage vascular plant groups from a tropical forest understorey is surveyed, revealing how these plant groups optimize ecophysiological function differently in tropical forest floors.

Contribution of NAC Transcription Factors to Plant Adaptation to Land

The results show conservation of transcriptional regulation and cellular function between moss and Arabidopsis thaliana water-conducting cells, and the conserved genetic basis suggests roles for NAC proteins in the adaptation of plants to land.

Evolution of plant conducting cells: perspectives from key regulators of vascular cell differentiation

This review describes how land plants evolved molecular systems to produce the specialized cells that function as WCCs and FCCs, and highlights the key transcription factors that regulate vascular cell differentiation.

Hydraulic conductances of angiosperms versus conifers: similar transport sufficiency at the whole-plant level.

The findings did not refute the "slow seedling" hypothesis per se, but failed to support one of the proposed mechanisms, and variations in other resistance components and hydraulic architecture ultimately equalize the sufficiency of water transport to leaves of conifers and angiosperms.

The origin and early evolution of vascular plant shoots and leaves

The evidence pinpoints testable developmental and genetic hypotheses relating to the origin of branching and indeterminate shoot architectures prior to the evolution of leaves, and demonstrates underestimation of polyphyly in the Evolution of leaves from branching forms in ‘telome theory’ hypotheses of leaf evolution.

Passive Origins of Stomatal Control in Vascular Plants

It is found that the complexity that characterizes stomatal control in seed plants is absent in early-diverging vascular plant lineages, indicating that a fundamental transition from passive to active metabolic control of plant water balance occurred after the divergence of ferns about 360 million years ago.

The photosynthetic capacity in 35 ferns and fern allies: mesophyll CO2 diffusion as a key trait.

Low mesophyll conductance to CO2 was the main cause for low photosynthesis in ferns and fern allies, which, in turn, was associated with thick cell walls and reduced chloroplast distribution towards intercellular mesophyLL air spaces.

Ancestral stomatal control results in a canalization of fern and lycophyte adaptation to drought.

It is found that all ferns closed stomata at very low levels of water stress and their survival afterwards was limited only by their capacitance and desiccation tolerance, which results in a monotypic strategy in f Ferns and lycophytes under water stress.