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1. Microtubes with Complex Cross Section Fabricated by C-Shaped Bessel Laser Beam for Mimicking Stomata That Opens and Closes Rapidly

Author:
Pan, Deng; Cai, Ze; Ji, Shengyun; Fan, Shengying; Wang, Pengrui; Lao, Zhaoxin; Yang, Liang; Ni, Jincheng; Wang, Chaowei; Li, Jiawen; Hu, Yanlei; Wu, Dong; Chen, Shaochen; Chu, JiaRu
Source:
ACS applied materials & interfaces 2018 v.10 no.42 pp. 36369-36376
ISSN:
1944-8252
Subject:
stomata,   etc   ; microparticles; polymerization; solvents;     Show all 4 Subjects
Abstract:
... This article presents a new method for fabricating complex cross-sectional microtubes with a high aspect ratio at micro/nanoscale. The microtubes are directly written in a photoresist using a femtosecond pulsed laser combined with a spatial light modulator (SLM). A new method for generating a C-shaped Bessel beam by modifying the Bessel beams with a SLM is reported for the first time. Using this g ...
DOI:
10.1021/acsami.8b11173

2. Assessment of leaf micromorphology after full desiccation of resurrection plants

Author:
Vassileva, Valya; Moyankova, Daniela; Dimitrova, Anna; Mladenov, Petko; Djilianov, Dimitar
Source:
Plant biosystems 2019 v.153 no.1 pp. 108-117
ISSN:
1724-5575
Subject:
stomata,   etc   ; drought tolerance; leaves; mesophyll; microscopy; microstructure; trichomes;     Show all 7 Subjects
Abstract:
... Resurrection plants are unique among higher plants because of their ability to withstand long periods of dehydration without damages. In this study, leaf epidermis and palisade mesophyll of three resurrection species, Haberlea rodopensis, Ramonda serbica and Ramonda myconi, grown under full desiccation and benign conditions, were analyzed by differential interference contrast microscopy. Detailed ...
DOI:
10.1080/11263504.2018.1473306

3. Blue and red light effects on stomatal oscillations

Author:
Ballard, Trevor; Peak, David; Mott, Keith
Source:
Functional plant biology 2019 v.46 no.2 pp. 146-151
ISSN:
1445-4408
Subject:
stomata,   etc   ; blue light; fiber optics; guard cells; leaves; red light;     Show all 6 Subjects
Abstract:
... The response of stomata to red and blue light was investigated using small fibre optics (66µm diameter) to control light levels on a single pair of guard cells without affecting the surrounding tissue. Low intensity red light (50µmolm-2s-1) applied to the entire leaf caused stomata to oscillate continuously for several hours with no apparent decrease in amplitude with time. Adding low intensity bl ...
DOI:
10.1071/FP18104

4. Evolution of Guard-Cell Theories: The Story of Sugars

Author:
Granot, David; Kelly, Gilor
Source:
Trends in plant science 2019 v.24 no.6 pp. 507-518
ISSN:
1360-1385
Subject:
stomata,   etc   ; aerial parts; carbon dioxide; guard cells; osmoregulation; osmotic pressure; photosynthesis; sugars; vascular plants;     Show all 9 Subjects
Abstract:
... Stomata are dynamic pores in the impermeable cuticle that coats the aerial parts of vascular plants, allowing the entry of CO2 for photosynthesis and controlling water loss. They are composed of two guard cells that can swell or shrink due to an increase or decrease in their osmotic pressure, respectively. Swelling opens the stomata and shrinking closes the stomata. For more than a century, scient ...
DOI:
10.1016/j.tplants.2019.02.009

5. Comparative survey of secretory structures and floral anatomy of Cohniella cepula and Cohniella jonesiana (Orchidaceae: Oncidiinae). New evidences of nectaries and osmophores in the genus

Author:
Kettler, Belén Araceli; Solís, Stella Maris; Ferrucci, María Silvia
Source:
Protoplasma 2019 v.256 no.3 pp. 703-720
ISSN:
0033-183X
Subject:
stomata,   etc   ; Orchidaceae; callus; calyx; corolla; epithelium; nectar; nectar secretion; nectaries; pollinators; surveys; vascular bundles;     Show all 12 Subjects
Abstract:
... The morpho-anatomical structure of nectaries, osmophores, and elaiophores, and the anatomical and micromorphological features of floral pieces of Cohniella cepula Hoffmans. and Cohniella jonesiana Rchb.f. were comparatively analyzed. In both species, bracteal and sepal nectaries are structured, i.e., they present a secretory epidermis, secretory parenchyma, and vascular bundles. Nectar secretion i ...
DOI:
10.1007/s00709-018-1330-1

6. Improving the representation of stomatal responses to CO2 within the Penman–Monteith model to better estimate evapotranspiration responses to climate change

Author:
Li, Xiaojie; Kang, Shaozhong; Niu, Jun; Huo, Zailin; Liu, Junzhou
Source:
Journal of hydrology 2019 v.572 pp. 692-705
ISSN:
0022-1694
Subject:
stomata,   etc   ; carbon dioxide; climate change; evapotranspiration; linear models; stomatal conductance; stomatal movement;     Show all 7 Subjects
Abstract:
... An increase in atmospheric CO2 concentration (CO2) affects stomatal conductance (gs). Since gs is an important parameter in the Penman–Monteith model (P-M), an accurate estimate of gs can improve the accuracy of the estimation of evapotranspiration (ET) by P-M when CO2 increases. This paper identifies three models of the relationship between gs and CO2 (the linear model, L, the hyperbolic model, H ...
DOI:
10.1016/j.jhydrol.2019.03.029

7. Effects of instantaneous and growth CO2 levels and abscisic acid on stomatal and mesophyll conductances

Author:
Mizokami, Yusuke; Noguchi, Ko; Kojima, Mikiko; Sakakibara, Hitoshi; Terashima, Ichiro
Source:
Plant, cell and environment 2019 v.42 no.4 pp. 1257-1269
ISSN:
0140-7791
Subject:
stomata,   etc   ; Arabidopsis thaliana; C3 photosynthesis; abscisic acid; carbon dioxide; diffusivity; leaves; mesophyll; mutants; stomatal movement;     Show all 10 Subjects
Abstract:
... C₃ photosynthesis is often limited by CO₂ diffusivity or stomatal (gₛ) and mesophyll (gₘ) conductances. To characterize effects of stomatal closure induced by either high CO₂ or abscisic acid (ABA) application on gₘ, we examined gₛ and gₘ in the wild type (Col‐0) and ost1 and slac1‐2 mutants of Arabidopsis thaliana grown at 390 or 780 μmol mol⁻¹ CO₂. Stomata of these mutants were reported to be in ...
DOI:
10.1111/pce.13484

8. Morphological structure and physiological research of heterophylly in Potamogeton octandrus

Author:
Li, Xiaoxia; He, Dingxuan; Guo, Youhao
Source:
Plant systematics and evolution 2019 v.305 no.3 pp. 223-232
ISSN:
0378-2697
Subject:
stomata,   etc   ; Potamogeton; abscisic acid; aquatic plants; chlorophyll; gibberellic acid; hormones; indole acetic acid; leaves;     Show all 9 Subjects
Abstract:
... Heterophylly is regarded as a manifestation of aquatic plants adapting to environment in evolutionary process. We studied the morphological and anatomical structure of submerged and floating leaves of Potamogeton octandrus. The changes of four endogenous hormones levels during the development of heterophylly were measured. The results showed that the epidermis thickness of floating leaves increase ...
DOI:
10.1007/s00606-019-1564-1

9. Phylogenetic position of the South African endemic genus Perdicium in the Gerbera-complex (Compositae, Mutisieae)

Author:
Zheng, W.; Zhu, Y.; Xu, X.; Funk, V.A.; Wen, J.
Source:
South African journal of botany 2019 v.121 pp. 478-485
ISSN:
0254-6299
Subject:
stomata,   etc   ; Gerbera; chloroplasts; guard cells; internal transcribed spacers; leaves; phylogeny; pollen; South Africa;     Show all 9 Subjects
Abstract:
... Perdicium of the Gerbera-complex (Mutisieae, Compositae) contains two species from the Western Cape of South Africa, but its phylogenetic position within the complex remains poorly understood. In this study, we assess the position of Perdicium based on a molecular phylogenetic analysis as well as leaf and pollen morphology, using a sampling scheme that includes 28 species from the Gerbera-complex. ...
DOI:
10.1016/j.sajb.2018.12.013

10. Taxonomy of the four-scaled species of Struthiola L. (Thymelaeaceae)

Author:
Makhoba, T.C.; Boatwright, J.S.; Manning, J.C.; Magee, A.R.
Source:
South African journal of botany 2019 v.121 pp. 577-583
ISSN:
0254-6299
Subject:
stomata,   etc   ; Thymelaeaceae; allopatry; calyx; color; ecology; fynbos; hypanthium; leaves; lectotypes; sand; shale; topographic slope; South Africa;     Show all 14 Subjects
Abstract:
... We present a taxonomic treatment of the four-scaled species of Struthiola (Thymelaeaceae) in which we recognise two species, S. striata and S. tetralepis, differing in ecology, growth form and flower morphology (bracteole and hypanthium length as well as the shape and colour of the sepals). Both species have amphistomatic foliage, with a higher density of stomata on the adaxial surface of the leav ...
DOI:
10.1016/j.sajb.2019.01.031

11. Cytokinin – A Developing Story

Author:
Wybouw, Brecht; De Rybel, Bert
Source:
Trends in plant science 2019 v.24 no.2 pp. 177-185
ISSN:
1360-1385
Subject:
stomata,   etc   ; apical meristems; biosynthesis; cytokinins; females; flowers; gametophytes; plant hormones; signal transduction;     Show all 9 Subjects
Abstract:
... In the past decade tremendous advances have been made in understanding the biosynthesis, perception, and signaling pathways of the plant hormone cytokinin. It also became clear that interfering with any of these steps greatly impacts all on stages of growth and development. This has recently spurted renewed effort to understand how cytokinin signaling affects developmental processes. As a result, ...
DOI:
10.1016/j.tplants.2018.10.012

12. The earliest evidence of cordaitalean cuticles from coal in the Pennsylvanian of Europe (Langsettian, Upper Silesian Basin, Czech Republic)

Author:
Šimůnek, Zbyněk
Source:
Review of palaeobotany and palynology 2019 v.261 pp. 81-94
ISSN:
0034-6667
Subject:
stomata,   etc   ; Pennsylvanian period; basins; cell walls; coal; guard cells; new species; peat; Czech Republic;     Show all 9 Subjects
Abstract:
... A dispersed cuticular assemblage with Cordaites Unger represents the oldest record of cordaitalean remains in peat deposits. Cordaitalean cuticles are easily distinguished by their elongated tetragonal or oblong cells and typical stomatal complexes. This assemblage comes from the coal seam 26 of the Karviná Formation, Lower Suchá Member, a few meters above the Namurian/Westphalian boundary in the ...
DOI:
10.1016/j.revpalbo.2018.11.007

13. Night-Time Transpiration – Favouring Growth?

Author:
Fricke, Wieland
Source:
Trends in plant science 2019
ISSN:
1360-1385
Subject:
stomata,   etc   ; acclimation; carbohydrates; carbon; carbon dioxide; leaf development; plant growth; transpiration;     Show all 8 Subjects
Abstract:
... Plants grow and transpire water during the day and night. Recent work highlights the idea that night-time transpirational water loss is a consequence of allowing respiratory CO2 to escape at sufficiently high rates through stomata. Respiration fuels night-time leaf expansion and requires carbohydrates produced during the day. As carbohydrate availability and growth are under the control of the pla ...
DOI:
10.1016/j.tplants.2019.01.007

14. Achene anatomy and stomatal characteristics of eighteen Crepis L. (Asteraceae) taxa from Turkey with notes on their systematic significance

Author:
Inceer, Huseyin; Kalmuk, Nursen Aksu; Imamoglu, Kemal Vehbi; Arslan, Gokhan; Duman, Ozge; Hayırlıoglu‐Ayaz, Sema; Guner, Gul
Source:
Nordic journal of botany 2018 v.36 no.8 pp. e01829
ISSN:
0107-055X
Subject:
stomata,   etc   ; Crepis; leaves; pericarp; Turkey (country);     Show all 5 Subjects
Abstract:
... Achene anatomy and stomatal characteristics of eighteen Crepis taxa from Turkey are here described for the first time. In all taxa examined the pericarp is composed of several layers of sclerenchymatous and parenchymatous cells. As for the achene, differences among taxa mainly concern the pericarp structure and its thickness and width. Stomata are present on both surface of the leaf in all studied ...
DOI:
10.1111/njb.01829

15. Size matters: point pattern analysis biases the estimation of spatial properties of stomata distribution

Author:
Naulin, Paulette I.; Valenzuela, Gerardo; Estay, Sergio A.
Source:
The new phytologist 2017 v.213 no.4 pp. 1956-1960
ISSN:
0028-646X
Subject:
stomata,   etc   ; Arabidopsis thaliana; models;     Show all 3 Subjects
Abstract:
... Stomata distribution is an example of biological patterning. Formal methods used to study stomata patterning are generally based on point‐pattern analysis, which assumes that stomata are points and ignores the constraints imposed by size on the placement of neighbors. The inclusion of size in the analysis requires the use of a null model based on finite‐size object geometry. In this study, we comp ...
DOI:
10.1111/nph.14305

16. Growing season extension affects ozone uptake by European forests

Author:
Anav, Alessandro; De Marco, Alessandra; Friedlingstein, Pierre; Savi, Flavia; Sicard, Pierre; Sitch, Stephen; Vitale, Marcello; Paoletti, Elena
Source:
The Science of the total environment 2019 v.669 pp. 1043-1052
ISSN:
0048-9697
Subject:
stomata,   etc   ; air; climate change; forest health; forests; growing season; inventories; models; ozone; peroxidase; phytotoxicity; pollution; stomatal conductance; terrestrial ecosystems;     Show all 14 Subjects
Abstract:
... Climate change significantly modifies terrestrial ecosystems and vegetation activity, yet little is known about how climate change and ozone pollution interact to affect forest health. Here we compared the trends of two metrics widely used to protect forests against negative impacts of ozone pollution, the AOT40 (Accumulated Ozone over Threshold of 40 ppb) which only depends on surface air ozone c ...
DOI:
10.1016/j.scitotenv.2019.03.020

17. Genesis of ultra-specialized histology with stable traits in mesophyll of drought tolerant apple cultivars

Author:
Hajnajari, Hassan; Akbari, Hamed; Abdossi, Vahid
Source:
Scientia horticulturae 2019 v.249 pp. 168-176
ISSN:
0304-4238
Subject:
stomata,   etc   ; apples; cultivars; deficit irrigation; drought tolerance; extracellular space; histology; leaves; mesophyll; trees; vascular bundles; water stress;     Show all 12 Subjects
Abstract:
... Even if some biological defense responses are activated instantaneously after stress occurrence, but other mechanisms of drought tolerance could be probed, detected and diagnosed as sable traits at mesophyll level. The present observations demonstrated multilateral modifications in different leaf parts, specialized parenchyma tissues and cribro-vascular bundles that facilitate vital activities in ...
DOI:
10.1016/j.scienta.2018.12.046

18. Modeling canopy conductance and transpiration from solar-induced chlorophyll fluorescence

Author:
Shan, Nan; Ju, Weimin; Migliavacca, Mirco; Martini, David; Guanter, Luis; Chen, Jingming; Goulas, Yves; Zhang, Yongguang
Source:
Agricultural and forest meteorology 2019 v.268 pp. 189-201
ISSN:
0168-1923
Subject:
stomata,   etc   ; canopy; chlorophyll; cropland; ecosystems; eddy covariance; energy; forests; grasslands; leaves; models; photosynthesis; remote sensing; stomatal conductance; vegetation cover;     Show all 15 Subjects
Abstract:
... Vegetation transpiration (T) is the process of plant water loss through the stomata on the leaf surface and plays a key role in the energy and water balance of the land surface, especially with dense vegetation cover. To date, however, estimation of ecosystem-scale T is still rather uncertain mainly due to errors in modeling canopy resistance or conductance. Considering the intrinsic link between ...
DOI:
10.1016/j.agrformet.2019.01.031

19. Acquiring Control: The Evolution of Stomatal Signalling Pathways

Author:
Sussmilch, Frances C.; Schultz, Jörg; Hedrich, Rainer; Roelfsema, M. Rob G.
Source:
Trends in plant science 2019 v.24 no.4 pp. 342-351
ISSN:
1360-1385
Subject:
stomata,   etc   ; Angiospermae; abscisic acid; carbon dioxide; evolution; genes; mosses and liverworts; signal transduction; stomatal movement; vascular plants;     Show all 10 Subjects
Abstract:
... In vascular plants, stomata balance two opposing functions: they open to facilitate CO2 uptake and close to prevent excessive water loss. Here, we discuss the evolution of three major signalling pathways that are known to control stomatal movements in angiosperms in response to light, CO2, and abscisic acid (ABA). We examine the evolutionary origins of key signalling genes involved in these pathwa ...
DOI:
10.1016/j.tplants.2019.01.002

20. On the origins of osmotically driven stomatal movements

Author:
Sussmilch, Frances C.; Roelfsema, M. Rob G.; Hedrich, Rainer
Source:
Thenew phytologist 2019 v.222 no.1 pp. 84-90
ISSN:
0028-646X
Subject:
stomata,   etc   ; Angiospermae; Bryophyta; biomechanics; dry environmental conditions; embryophytes; genes; guard cells; ion channels; mosses and liverworts; spores; stomatal movement; turgor;     Show all 13 Subjects
Abstract:
... Contents Summary 84 I. Introduction 84 II. Stomatal form and biomechanics 85 III. Stomatal function 86 IV. Evolution of guard cell ion channels 87 V. Conclusions 88 Acknowledgements 88 Author contributions 88 References 88 SUMMARY: Stomatal pores with apertures that can be adjusted by changes in guard cell turgor have facilitated plant success in dry environments. We explore their evolutionary ori ...
DOI:
10.1111/nph.15593