Acclimation of mesophyll conductance and anatomy to light during leaf ageing in Arabidopsis thaliana

2021 ◽  
Author(s):  
Marc Carriquí ◽  
Miquel Nadal ◽  
Jaume Flexas
Keyword(s):  
Arabidopsis Thaliana ◽  
Mesophyll Conductance ◽  
Leaf Ageing

scholarly journals Photosynthetic efficiency and mesophyll conductance are unaffected in Arabidopsis thaliana aquaporin knock-out lines

2019 ◽  
Author(s):  
Johannes Kromdijk ◽  
Katarzyna Głowacka ◽  
Stephen P Long
Keyword(s):  
Arabidopsis Thaliana ◽  
Photosynthetic Efficiency ◽  
Mesophyll Conductance ◽  
Knock Out ◽  
Extensive Evaluation

Extensive evaluation of gm and photosynthetic efficiency of Arabidopsis aquaporin knock-out lines using a range of methods and measurement conditions failed to establish significant deviations from the Col-0 background.

scholarly journals Measurement of leaf day respiration using a new isotopic disequilibrium method compared with the Laisk method

2017 ◽  
Author(s):  
Xiao Ying Gong ◽  
Guillaume Tcherkez ◽  
Johannes Wenig ◽  
Rudi Schäufele ◽  
Hans Schnyder
Keyword(s):  
Plant Physiology ◽  
Direct Measurement ◽  
Photosynthetic Performance ◽  
List Type ◽  
Biogeochemical Processes ◽  
Mesophyll Conductance ◽  
Leaf Respiration ◽  
Leaf Ageing ◽  
Mechanistic Understanding ◽  
Isotopic Disequilibrium

SummaryQuantification of leaf respiration is of great importance for the understanding of plant physiology and ecosystem biogeochemical processes. Leaf respiration continues in light (RL) but supposedly at a lower rate compared to the dark (RD). Yet, there is no method for direct measurement of RL and most available methods require unphysiological measurement conditions.A method based on isotopic disequilibrium quantified RL (RL 13C) and mesophyll conductance of young and old fully-expanded leaves of six species compared RL 13C to RL values determined by the Laisk method (RL Laisk).RL 13C and RL Laisk were consistently lower than RD. Leaf ageing negatively affected photosynthetic performance, but had no significant effect on RL or RL/RD as determined by both methods. RL Laisk and RL 13C were measured successively on the same leaves and correlated positively (r2=0.38), but average RL Laisk was 28% lower than RL13C. Using A/Cc curves instead of A/Ci curves, a higher photocompensation point Γ* (by 5 μmol mol-1) was found but the correction had no influence on RL Laisk estimates.The results suggest that the Laisk method underestimated RL. The isotopic disequilibrium method is useful for assessing responses of RL to irradiance and CO2, improving our mechanistic understanding of RL.

Mesophyll conductance to CO2in Arabidopsis thaliana

2007 ◽  
Vol 175 (3) ◽  
pp. 501-511 ◽  
Author(s):  
J. Flexas ◽  
M. F. Ortuño ◽  
M. Ribas-Carbo ◽  
A. Diaz-Espejo ◽  
I. D. Flórez-Sarasa ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Mesophyll Conductance

Mesophyll conductance: the leaf corridors for photosynthesis

2020 ◽  
Vol 48 (2) ◽  
pp. 429-439 ◽  
Author(s):  
Jorge Gago ◽  
Danilo M. Daloso ◽  
Marc Carriquí ◽  
Miquel Nadal ◽  
Melanie Morales ◽  
...  
Keyword(s):  
Molecular Mechanisms ◽  
Current Knowledge ◽  
Main Role ◽  
Mesophyll Conductance ◽  
Future Studies ◽  
Cell Structures ◽  
Leaf Tissues ◽  
Change Framework ◽  
Chloroplast Stroma

Besides stomata, the photosynthetic CO2 pathway also involves the transport of CO2 from the sub-stomatal air spaces inside to the carboxylation sites in the chloroplast stroma, where Rubisco is located. This pathway is far to be a simple and direct way, formed by series of consecutive barriers that the CO2 should cross to be finally assimilated in photosynthesis, known as the mesophyll conductance (gm). Therefore, the gm reflects the pathway through different air, water and biophysical barriers within the leaf tissues and cell structures. Currently, it is known that gm can impose the same level of limitation (or even higher depending of the conditions) to photosynthesis than the wider known stomata or biochemistry. In this mini-review, we are focused on each of the gm determinants to summarize the current knowledge on the mechanisms driving gm from anatomical to metabolic and biochemical perspectives. Special attention deserve the latest studies demonstrating the importance of the molecular mechanisms driving anatomical traits as cell wall and the chloroplast surface exposed to the mesophyll airspaces (Sc/S) that significantly constrain gm. However, even considering these recent discoveries, still is poorly understood the mechanisms about signaling pathways linking the environment a/biotic stressors with gm responses. Thus, considering the main role of gm as a major driver of the CO2 availability at the carboxylation sites, future studies into these aspects will help us to understand photosynthesis responses in a global change framework.

Stable genetic transformation of Arabidopsis thaliana by Agrobacterium inoculation in planta

1994 ◽  
Vol 5 (4) ◽  
pp. 551-558 ◽  
Author(s):  
Seok So Chang ◽  
Soon Ki Park ◽  
Byung Chul Kim ◽  
Bong Joong Kang ◽  
Dal Ung Kim ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Genetic Transformation ◽  
In Planta

The effect of daylength on the transition to flowering in phytochrome-deficient, late-flowering and double mutants of Arabidopsis thaliana

1995 ◽  
Vol 95 (2) ◽  
pp. 260-266 ◽  
Author(s):  
Maarten Koornneef ◽  
Corrie Hanhart ◽  
Patty van Loenen-Martinet ◽  
Hetty Blankestijn de Vries
Keyword(s):  
Arabidopsis Thaliana ◽  
Late Flowering ◽  
Transition To Flowering
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