scholarly journals A Decrease in Mesophyll Conductance by Cell-Wall Thickening Contributes to Photosynthetic Downregulation

2020 ◽  
Vol 183 (4) ◽  
pp. 1600-1611 ◽  
Author(s):  
Daisuke Sugiura ◽  
Ichiro Terashima ◽  
John R. Evans
Keyword(s):  
Cell Wall ◽  
Wall Thickening ◽  
Mesophyll Conductance ◽  
Photosynthetic Downregulation

scholarly journals Reduced mesophyll conductance by cell wall thickening and chloroplasts decreasing driven the decline of photosynthesis under sole NH4+ supply

2022 ◽  
Author(s):  
yiwen cao ◽  
Yonghui Pan ◽  
Tianheng Liu ◽  
Min Wang ◽  
Shiwei Guo
Keyword(s):  
Cell Wall ◽  
Wall Thickening ◽  
Mesophyll Conductance ◽  
N Sources ◽  
Unit Leaf ◽  
Use Efficiency ◽  
The Difference ◽  
The Relationship ◽  
Exposed Surface Area ◽  
N Use

The relationship between nitrogen (N) sources and photosynthetic capacity of leaf differs between species. However, the leaf anatomical variabilities related to photosynthesis (A) of shrubs under different forms of N remain imperfectly known. Here, Lonicera Japonica (a shrub) was grown hydroponically in the presence of three forms of N (sole NH4+, 50%/50% NH4+/NO3– and sole NO3–). A and photosynthetic N use efficiency significantly decreased under sole NH4+ supply, in parallel with down-regulated stomatal conductance (gs), mesophyll conductance (gm), and electron transfer rate (J). Up to the total A decline of 41.28% in sole NH4+ supply (compare with sole NO3–), the gm attributed to 60.3% of the total limitations. Besides, the decreased internal air space explained the increase of gas-phase resistance, and the increased liquid-phase resistance in sole NH4+ supply was ascribed to the thicker cell wall thickness (Tcw) and decreased chloroplasts exposed surface area per unit leaf area (Sc/S). The discrepancy of Sc/S could be interpreted by the altered chloroplasts numbers and the distance between adjacent chloroplasts (Dchl-chl). These results indicate the alteration of Tcw and chloroplast numbers were the main causes of the difference in gm in coping with varied N sources.

Cell wall thickening in two Ulva species in response to heavy metal marine pollution

2020 ◽  
Vol 35 ◽  
pp. 101125 ◽  
Author(s):  
Safia Zeroual ◽  
Salah Eddine El Bakkal ◽  
Mounir Mansori ◽  
Sabine Lhernould ◽  
Céline Faugeron-Girard ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Cell Wall ◽  
Marine Pollution ◽  
Wall Thickening

Regulation of Cell Wall Thickening by a Medley of Mechanisms

2019 ◽  
Vol 24 (9) ◽  
pp. 853-866 ◽  
Author(s):  
Ian W. McCahill ◽  
Samuel P. Hazen
Keyword(s):  
Cell Wall ◽  
Wall Thickening

scholarly journals Increase in Cell Wall Thickening and Biomass Production by Overexpression of PmCesA2 in Poplar

2020 ◽  
Vol 11 ◽  
Author(s):  
Samaneh Sadat Maleki ◽  
Kourosh Mohammadi ◽  
Ali Movahedi ◽  
Fan Wu ◽  
Kong Shu Ji
Keyword(s):  
Cell Wall ◽  
Biomass Production ◽  
Wall Thickening

Stem Protective Tissue in Erythroxylum Tortuosum (Erythroxylaceae), A Fire Tolerant Species from Cerrado

IAWA Journal ◽  
2008 ◽  
Vol 29 (1) ◽  
pp. 69-77 ◽  
Author(s):  
Alexandre Antonio Alonso ◽  
Silvia Rodrigues Machado
Keyword(s):  
Cell Wall ◽  
Wall Thickening ◽  
Brazilian Cerrado ◽  
Tolerant Species ◽  
Phenolic Substances ◽  
Shrubby Species ◽  
Terminal Buds

The origin and structure are described of the secondary protective tissue in the stem of Erythorxylum tortuosum Mart., a fire tolerant shrubby species common in Brazilian cerrado. The highly tortuous stems are covered with thick bark which is more developed at the base of the stem. After fire in the cerrado, rhytidome fragments of the burned stem flake off, revealing newly formed cork. The first periderm appears near of the terminal buds and is iniated by periclinal divisions in subepidermal cells giving rise to radial rows of cells. The first phellogen is discernible only after the differentiation of the several radial rows of cork cells. Other phellogens have their origin in successively deeper layers of the cortex. The sucessive periderms are discontinuous around the circumference. The collapsed cells with phenolic substances and the accumulated dead cells cause the formation of discontinuous blackish lines, which delimit the sucessive periderms in the rhytidome. The rhytidome contains large quantities of sclereids developed from cell wall thickening of cortex cells. The occurrence of periderm in the young parts of the stem and of rhytidome in the older parts represents pyrophytic characteristics and may explain, in part, the fire tolerance of this species.

scholarly journals Cell wall composition strongly influences mesophyll conductance in gymnosperms

2020 ◽  
Vol 103 (4) ◽  
pp. 1372-1385 ◽  
Author(s):  
Marc Carriquí ◽  
Miquel Nadal ◽  
María J. Clemente‐Moreno ◽  
Jorge Gago ◽  
Eva Miedes ◽  
...  
Keyword(s):  
Cell Wall ◽  
Cell Wall Composition ◽  
Mesophyll Conductance

Fine structure of tissue bordering lesions induced by wounding and virus infection

1978 ◽  
Vol 56 (23) ◽  
pp. 2990-2999 ◽  
Author(s):  
G. Faulkner ◽  
Warwick C. Kimmins
Keyword(s):  
Cell Wall ◽  
Fine Structure ◽  
Secondary Cell Wall ◽  
Wall Material ◽  
Wall Thickening ◽  
Pinto Bean ◽  
Local Lesions ◽  
Virus Localization ◽  
Similar Appearance ◽  
Secondary Cell Wall Thickening

Tissue in Phaseolus vulgaris L. cv. Pinto bean bordering local lesions induced by tobacco mosaic virus showed cell wall deposition associated with paramural body formation in a narrow ring of viable cells extending one to three cell diameters around the lesions. Deposition, which led to secondary cell wall thickening, was greatest 3–4 days after inoculation, the time when the lesion stopped expanding. Secondary cell wall thickening, of similar appearance but less pronounced, was seen in tissue bordering local lesions which continued to expand; no significant secondary cell wall thickening was observed in leaves with a nonlocalized infection. Cells bordering mechanical lesions differed markedly in fine structure from cells bordering virus and chemical lesions. It is suggested that the deposition of extra cell wall material in the wall regions of cells bordering fully expanded local lesions is associated with virus localization.

Sign in / Sign up

Export Citation Format

Share Document