Leaf anatomy and subgeneric affiliations of C3 and C4 species of Suaeda (Chenopodiaceae) in North America

1997 ◽  
Vol 84 (9) ◽  
pp. 1198-1210 ◽  
Author(s):  
Deborah D. Fisher ◽  
H. Jochen Schenk ◽  
Jennifer A. Thorsch ◽  
Wayne R. Ferren
Keyword(s):  
North America ◽  
Leaf Anatomy ◽  
C3 And C4 Species ◽  
C4 Species

scholarly journals Carbon isotope composition and leaf anatomy as a tool to characterize the photosynthetic mechanism of Artemisia annua L.

2005 ◽  
Vol 17 (1) ◽  
pp. 187-190 ◽  
Author(s):  
José Abramo Marchese ◽  
Fernando Broetto ◽  
Lin Chau Ming ◽  
Carlos Ducatti ◽  
Roberto Antonio Rodella ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Leaf Anatomy ◽  
Vascular Tissue ◽  
Artemisia Annua ◽  
Isotope Composition ◽  
Carbon Isotope Composition ◽  
Kranz Anatomy ◽  
Artemisia Annua L ◽  
C3 And C4 Species ◽  
C4 Species

Leaves of Artemisia annua L. are a plentiful source of artemisinin, a drug with proven effectiveness against malaria. The aim of this study was to classify the photosynthetic mechanism of A. annua through studies of the carbon isotope composition (delta 13C) and the leaf anatomy. A. annua presented a delta 13C value of - 31.76 ± 0.07, which characterizes the plants as a typical species of the C3 photosynthethic mechanism, considering that the average delta 13C values for C3 and C4 species are -28 and -14, respectively. The leaf anatomy studies were consistent with the delta 13C results, where, in spite of the existence of parenchymatic cells forming a sheath surrounding the vascular tissue, the cells do not contain chloroplasts or starch. This characteristic is clearly different from that of the Kranz anatomy found in C4 species.

δ13C values of C3 and C4 species of Australian Neurachne and its allies (Poaceae)

1983 ◽  
Vol 31 (3) ◽  
pp. 317 ◽  
Author(s):  
PW Hattersley ◽  
Z Roksandic
Keyword(s):  
Leaf Anatomy ◽  
Related Species ◽  
C4 Plants ◽  
C3 Plants ◽  
Closely Related Species ◽  
Δ13c Values ◽  
C3 And C4 Species ◽  
C4 Species

δ13C values are presented for the 10 closely related species of the endemic Australian genera Thyridolepis, Paraneurachne and Neurachne (Poaceae). The three Thyridolepis species exhibit values typical of C3 plants, Paraneurachne muelleri of C4 plants. The genus Neurachne is variable; five species have C*3 values while N. munroi is typically C*4. These results generally confirm previous anatomical observations showing that Neurachne appears to contain both C3 and C4 species. N. minor, however, while having C3 δ13C values, has leaf anatomy which suggests it is C4. N. minor may be a C3/C4 intermediate.

Regulation of photorespiration in C3 and C4 species

1975 ◽  
Vol 41 (2) ◽  
pp. 137-179 ◽  
Author(s):  
Raymond Chollet ◽  
William L. Ogren
Keyword(s):  
C3 And C4 Species ◽  
C4 Species

Photosynthetic responses of C3 and C4 species from cool shaded habitats in Hawaii

Oecologia ◽  
1980 ◽  
Vol 47 (1) ◽  
pp. 106-109 ◽  
Author(s):  
Robert H. Robichaux ◽  
Robert W. Pearcy
Keyword(s):  
C3 And C4 Species ◽  
C4 Species ◽  
Photosynthetic Responses

Distribution of South African C3 and C4 species of Cyperaceae in relation to climate and phylogeny

2004 ◽  
Vol 29 (3) ◽  
pp. 313-319 ◽  
Author(s):  
W. D. STOCK ◽  
D. K. CHUBA ◽  
G. A. VERBOOM
Keyword(s):  
South African ◽  
C3 And C4 Species ◽  
C4 Species

Leaf anatomy, gas exchange and photosynthetic enzyme activity in Flaveria kochiana

2007 ◽  
Vol 34 (2) ◽  
pp. 118 ◽  
Author(s):  
Erika A. Sudderth ◽  
Riyadh M. Muhaidat ◽  
Athena D. McKown ◽  
Ferit Kocacinar ◽  
Rowan F. Sage
Keyword(s):  
Gas Exchange ◽  
Leaf Anatomy ◽  
Carbon Isotope Ratio ◽  
Compensation Point ◽  
Initial Slope ◽  
Kranz Anatomy ◽  
Pyruvate Orthophosphate Dikinase ◽  
Co2 Compensation Point ◽  
C4 Species ◽  
Flaveria Species

Flaveria (Asteraceae) is one of the few genera known to contain both C3 and C4 species, in addition to numerous biochemically-intermediate species. C3-C4 and C4-like intermediate photosynthesis have arisen more than once in different phylogenetic clades of Flaveria. Here, we characterise for the first time the photosynthetic pathway of the recently described species Flaveria kochiana B.L. Turner. We examined leaf anatomy, activity and localisation of key photosynthetic enzymes, and gas exchange characteristics and compared these trait values with those from related C4 and C4-like Flaveria species. F. kochiana has Kranz anatomy that is typical of other C4 Flaveria species. As in the other C4 lineages within the Flaveria genus, the primary decarboxylating enzyme is NADP-malic enzyme. Immunolocalisation of the major C4 cycle enzymes, PEP carboxylase and pyruvate, orthophosphate dikinase, were restricted to the mesophyll, while Rubisco was largely localised to the bundle sheath. Gas exchange analysis demonstrated that F. kochiana operates a fully functional C4 pathway with little sensitivity to ambient oxygen levels. The CO2 compensation point (2.2 µbar) was typical for C4 species, and the O2-response of the CO2 compensation point was the same as the C4 species F. trinervia. Notably, F. vaginata (B.L. Robinson & Greenman), a putative C4-like species that is the nearest relative of F. kochiana, had an identical response of the CO2 compensation point to O2. Furthermore, F. vaginata, exhibited a carbon isotope ratio (–15.4‰) similar to C4 species including F. australasica Hooker, F. trinervia Spreng. C. Mohr and the newly characterised F. kochiana. F. vaginata could be considered a C4 species, but additional studies are necessary to confirm this hypothesis. In addition, our results show that F. kochiana uses an efficient C4 cycle, with the highest initial slope of the A/Ci curve of any C4 Flaveria species.

scholarly journals Leaf Anatomy of C3-C4 Species as Related to Evolution of C4 Photosynthesis

1989 ◽  
Vol 91 (4) ◽  
pp. 1543-1550 ◽  
Author(s):  
R. Harold Brown ◽  
Paul W. Hattersley
Keyword(s):  
Leaf Anatomy ◽  
C4 Photosynthesis ◽  
C4 Species
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