TY - JOUR
T1 - Cuticle permeability is an important parameter for the trade-off strategy between drought tolerance and CO2 uptake in land plants
AU - Monda, Keina
AU - Mabuchi, Atsushi
AU - Negi, Juntaro
AU - Iba, Koh
N1 - Funding Information:
This work was supported by JSPS KAKENHI, Japan (grant nos. JP20K15820 to K.M., JP18K06293 to J.N., and JP20H03279 to K.I.) and by JST CREST, Japan (grant no. JPMJCR15O5 to K.I.), and by Kyushu University Qdai-jump Research Program, Japan (grant no. 02306 to A.M.).
Publisher Copyright:
© 2021 Taylor & Francis Group, LLC.
PY - 2021
Y1 - 2021
N2 - To protect against water loss, land plants have developed the cuticle; however, the cuticle strongly restricts CO2 uptake for photosynthesis. Controlling this trade-off relationship is an important strategy for plant survival, but the extent to which the changes in cuticle affects this relationship is not clear. To evaluate this, we measured CO2 assimilation rate and transpiration rate together in the Arabidopsis thaliana mutant excessive transpiration1 (extra1), which exhibited marked evaporative water loss due to an increased cuticle permeability caused by a new allele of ACETYL-COA CARBOXYLASE 1 (ACC1). Under high humidity (85%) conditions, the extra1 mutant exhibited higher CO2 assimilation rate in exchange for decreasing water use efficiency by one-third compared to the slow anion channel-associated 1 (slac1) mutant, whose stomata are continuously open. Our results indicate that the increased cuticle permeability in extra1 affects transpiration rate more than CO2 assimilation rate, but the effect on CO2 assimilation rate is larger than the effect of open stomata in slac1, suggesting that the cuticle permeability is an important parameter for the trade-off relationship between drought tolerance and CO2 uptake in land plants.
AB - To protect against water loss, land plants have developed the cuticle; however, the cuticle strongly restricts CO2 uptake for photosynthesis. Controlling this trade-off relationship is an important strategy for plant survival, but the extent to which the changes in cuticle affects this relationship is not clear. To evaluate this, we measured CO2 assimilation rate and transpiration rate together in the Arabidopsis thaliana mutant excessive transpiration1 (extra1), which exhibited marked evaporative water loss due to an increased cuticle permeability caused by a new allele of ACETYL-COA CARBOXYLASE 1 (ACC1). Under high humidity (85%) conditions, the extra1 mutant exhibited higher CO2 assimilation rate in exchange for decreasing water use efficiency by one-third compared to the slow anion channel-associated 1 (slac1) mutant, whose stomata are continuously open. Our results indicate that the increased cuticle permeability in extra1 affects transpiration rate more than CO2 assimilation rate, but the effect on CO2 assimilation rate is larger than the effect of open stomata in slac1, suggesting that the cuticle permeability is an important parameter for the trade-off relationship between drought tolerance and CO2 uptake in land plants.
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U2 - 10.1080/15592324.2021.1908692
DO - 10.1080/15592324.2021.1908692
M3 - Article
C2 - 33830857
AN - SCOPUS:85104067024
VL - 16
JO - Plant Signaling and Behavior
JF - Plant Signaling and Behavior
SN - 1559-2316
IS - 6
M1 - 1908692
ER -