Additional notes on the taxonomy of Parakeelya Hershk. (Montiaceae) DOI Creative Commons
Mark Hershkovitz

Published: Sept. 30, 2023

Parakeelya Hershk. (Montiaceae) has become the name conserved over older Rumicastrum Ulb. for a lineage of Australian plants historically classified in Calandrinia Kunth. In Candollean taxonomy persistent to late 20th Century, were large, heterogeneous, and polyphyletic circumscription Calandrinia, later referred by designation “Calandrinia s. l.” Following cladistic dissection, “s. str.” was restricted small, homogeneous, well-supported clade American plants. The formerly monotypic poorly studied genus Ulb., Parakeelya, which specifically excluded latter. specialists, however, eschewed both these names continued classify existing new species as Calandrinia. However, they never justified this usage on taxonomic evidence. some cases, used though it applied exclusively plants, explained why does or not pertain lineage. Phylogenetics researchers appropriated refer plus str., predicated disprove its monophyly, supported first place. They demonstrated that indeed pertains lineage, but proposed nomenclatural conservation Parakeelya. Yet, numerous subsequent publications, use describe present work, I demonstrate application str. conceptually illegitimate, because are conceptual homonyms taxa had been applied. discuss evidence deliberate with objective preventing correct from being accepted includes is limited earlier-reported irregularities authors’ proposal conserve including considerable factually incorrect otherwise misleading information biased favor approved conservation. terms equivalence scientific assertions, be erroneous, incidentally deliberately so.

Language: Английский

Variation in green roof vegetation health driven by age and design DOI Creative Commons
Wenxi Liao, Madison Appleby,

Howard Rosenblat

et al.

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

Abstract Green roofs have been increasingly implemented in cities globally to enhance urban ecosystem services degraded by climate change and rapid urbanization. However, temporal trends green roof vegetation health the effects of design considerations at a large scale remain unclear. Here, we used 8-cm very-high-resolution multispectral remote sensing imagery quantify changes associated drivers across 1,380 individual modules Toronto from 2011 2018. Results show an average increase decline patchiness as age. We identify module area, building height, type primary factors influencing health, with area positively height inversely affecting health. In terms type, sedum mats are generally healthier than woody plants grasses on roofs. Additionally, specific thresholds, sizes linear dimensions 3.2–4.8 m heights 14.4 m, for which smaller higher performance abruptly declines. These findings present robust, cost-effective analytical framework long-term assessment modeling infrastructure scales, providing valuable insights into greening practices.

Language: Английский

Citations

0
Regulation of Crassulacean acid metabolism at the protein level in Kalanchoë laxiflora DOI Creative Commons
Katharina Schiller,

Saskia Janshoff,

Sanja Zenker

et al.

PLANT PHYSIOLOGY, Journal Year: 2025, Volume and Issue: 197(4)

Published: March 28, 2025

Abstract Crassulacean acid metabolism (CAM) is an adaptation to environments where water availability seasonal or extremely low. It serves ensure plant survival and/or maintain productivity in these adverse environments. CAM has repeatedly evolved many lineages, although it requires a large and complex set of enzymes, transporters, regulatory processes control metabolite flux pools. To test the potential levels at which regulated, we analyzed Kalanchoë laxiflora compared with genomes transcriptomes other plants across wide phylogenetic range. We show that CAM-associated transcripts proteins did not exhibit binary on/off pattern abundance between day night K. laxiflora. Instead, displayed shared amino changes among C3 plants, especially starch metabolism. Phosphoproteomics identified differential phosphorylation night. Taken together, our results demonstrate photosynthesis regulated both transcript protein levels.

Language: Английский

Citations

0
The late occurrence of specialized hunter-gatherer occupation of tropical rainforests in Pang Mapha, northwestern Thailand DOI
Kantapon Suraprasit, Rasmi Shoocongdej, Athiwat Wattanapituksakul

et al.

Quaternary Science Reviews, Journal Year: 2024, Volume and Issue: 329, P. 108573 - 108573

Published: March 8, 2024

Language: Английский

Citations

3
Shifting photosynthesis between the fast and slow lane: Facultative CAM and water-deficit stress DOI Creative Commons
Klaus Winter, Joseph A. M. Holtum

Journal of Plant Physiology, Journal Year: 2024, Volume and Issue: 294, P. 154185 - 154185

Published: Jan. 28, 2024

Five decades ago, the first report of a shift from C

Language: Английский

Citations

2
Low internal air space in plants with crassulacean acid metabolism may be an anatomical spandrel DOI Creative Commons
Alistair Leverett, Anne M. Borland,

Emma J Inge

et al.

Annals of Botany, Journal Year: 2023, Volume and Issue: 132(4), P. 811 - 817

Published: Aug. 25, 2023

Abstract Crassulacean acid metabolism (CAM) is a photosynthetic adaptation found in at least 38 plant families. Typically, the anatomy of CAM plants characterized by large cells and low percentage leaf volume consisting internal air space (% IAS). It has been suggested that reduced mesophyll conductance (gm) arising from % IAS benefits preventing movement CO2 out ultimately minimizing leakage leaves into atmosphere during day-time decarboxylation. Here, we propose does not provide any adaptive benefit to plants, because stomatal closure phase III will result concentrations becoming saturated, meaning gm have meaningful impact on flux gases within leaves. We suggest more likely an indirect consequence maximizing cellular leaf, for overnight storage malic cycle.

Language: Английский

Citations

3
Crassulacean acid metabolism (CAM) at the crossroads: a special issue to honour 50 years of CAM research by Klaus Winter DOI Open Access
Rowan F. Sage, Erika J. Edwards, Karolina Heyduk

et al.

Annals of Botany, Journal Year: 2023, Volume and Issue: unknown

Published: Oct. 19, 2023

A spectacular feature of the botanical world is succulent flora, which presents a diversity life forms from fascinating to strange (Figs 123).Succulence describes fleshy tissue with high water content, yet as character state highly variable, ranging slightly planar leaves grossly corpulent stems cacti and aloes (Fig. 2; Grace, 2019;Peréz-Lopéz et al., 2023).The associated function also shows marked variation, salt storage, mechanical support and, in majority succulents, storage organic acids used crassulacean acid metabolism (CAM).Succulence hypothesized be essential for CAM photosynthetic pathway because it allows large amounts assimilated carbon form malate, assists process by trapping CO 2 released during day (Males, 2017; Borland 2018;Edwards, 2019).In typical photosynthesis, plants open stomata at night fix inorganic into malic using phosphoenolpyruvate (PEP) carboxylase (see figs 1 Chomthong Griffiths, 2023, this issue explanatory diagrams).The then stored vacuoles.During day, close, decarboxylated raise concentrations within levels that suppress wasteful photorespiration.Rubisco refixes trapped closed stomata, fixation products are synthesized sugars starch same biochemistry C 3 photosynthesis.Because over much transpiration low thus exhibit water-use efficiencies (WUE) photosynthesis.High WUE enables survival dry locations, include arid semi-arid landscapes, soil-less environments such epiphyte habitat on tree branches or lithophyte habit rock faces.CAM abundant well dispersed across world's flora occurring ferns, gymnosperms, monocots eudicots.As examined (Gilman 2023), photosynthesis independently evolved 60 times vascular plants, making one best examples evolutionary convergence complex trait living world.The repeated evolution has resulted hundreds genera close 18 000 species some degree CAM, numerous being recognized iconic

Language: Английский

Citations

1
Additional notes on the taxonomy of Parakeelya Hershk. (Montiaceae) DOI Creative Commons
Mark Hershkovitz

Published: Sept. 30, 2023

Parakeelya Hershk. (Montiaceae) has become the name conserved over older Rumicastrum Ulb. for a lineage of Australian plants historically classified in Calandrinia Kunth. In Candollean taxonomy persistent to late 20th Century, were large, heterogeneous, and polyphyletic circumscription Calandrinia, later referred by designation “Calandrinia s. l.” Following cladistic dissection, “s. str.” was restricted small, homogeneous, well-supported clade American plants. The formerly monotypic poorly studied genus Ulb., Parakeelya, which specifically excluded latter. specialists, however, eschewed both these names continued classify existing new species as Calandrinia. However, they never justified this usage on taxonomic evidence. some cases, used though it applied exclusively plants, explained why does or not pertain lineage. Phylogenetics researchers appropriated refer plus str., predicated disprove its monophyly, supported first place. They demonstrated that indeed pertains lineage, but proposed nomenclatural conservation Parakeelya. Yet, numerous subsequent publications, use describe present work, I demonstrate application str. conceptually illegitimate, because are conceptual homonyms taxa had been applied. discuss evidence deliberate with objective preventing correct from being accepted includes is limited earlier-reported irregularities authors’ proposal conserve including considerable factually incorrect otherwise misleading information biased favor approved conservation. terms equivalence scientific assertions, be erroneous, incidentally deliberately so.

Language: Английский

Citations

0