Back to Search
Start Over
Structural and physiological analyses in Salsoleae (Chenopodiaceae) indicate multiple transitions among C3, intermediate, and C4 photosynthesis
- Source :
- Journal of Experimental Botany
- Publication Year :
- 2013
- Publisher :
- Oxford University Press, 2013.
-
Abstract
- In subfamily Salsoloideae (family Chenopodiaceae) most species are C4 plants having terete leaves with Salsoloid Kranz anatomy characterized by a continuous dual chlorenchyma layer of Kranz cells (KCs) and mesophyll (M) cells, surrounding water storage and vascular tissue. From section Coccosalsola sensu Botschantzev, leaf structural and photosynthetic features were analysed on selected species of Salsola which are not performing C4 based on leaf carbon isotope composition. The results infer the following progression in distinct functional and structural forms from C3 to intermediate to C4 photosynthesis with increased leaf succulence without changes in vein density: From species performing C3 photosynthesis with Sympegmoid anatomy with two equivalent layers of elongated M cells, with few organelles in a discontinuous layer of bundle sheath (BS) cells (S. genistoides, S. masenderanica, S. webbii) > development of proto-Kranz BS cells having mitochondria in a centripetal position and increased chloroplast number (S. montana) > functional C3-C4 intermediates having intermediate CO2 compensation points with refixation of photorespired CO2, development of Kranz-like anatomy with reduction in the outer M cell layer to hypodermal-like cells, and increased specialization (but not size) of a Kranz-like inner layer of cells with increased cell wall thickness, organelle number, and selective expression of mitochondrial glycine decarboxylase (Kranz-like Sympegmoid, S. arbusculiformis; and Kranz-like Salsoloid, S. divaricata) > selective expression of enzymes between the two cell types for performing C4 with Salsoloid-type anatomy. Phylogenetic analysis of tribe Salsoleae shows the occurrence of C3 and intermediates in several clades, and lineages of interest for studying different forms of anatomy.
- Subjects :
- 0106 biological sciences
Physiology
Blotting, Western
Molecular Sequence Data
Salsoloideae
Plant Science
Chenopodiaceae
Salsola genistoides
Photosynthesis
Salsola masenderanica
010603 evolutionary biology
01 natural sciences
Carbon Cycle
Cell wall
Evolution, Molecular
immunolocalization
Microscopy, Electron, Transmission
Species Specificity
Botany
DNA, Ribosomal Spacer
Salsola webbii
C4 photosynthesis
Phylogeny
Terete
Plant Proteins
Carbon Isotopes
biology
photosynthetic enzymes
C3–C4 intermediate
Sequence Analysis, DNA
15. Life on land
biology.organism_classification
Vascular bundle
Salsola montana
Chloroplast
C3 plants
C4 plants
Salsola divaricata
leaf anatomy
010606 plant biology & botany
Research Paper
Subjects
Details
- Language :
- English
- ISSN :
- 14602431 and 00220957
- Volume :
- 64
- Issue :
- 12
- Database :
- OpenAIRE
- Journal :
- Journal of Experimental Botany
- Accession number :
- edsair.doi.dedup.....1dd6cfe45524977ff69b9d109b2b160f