Deactivation of aquaporins decreases internal conductance to CO2 diffusion in tobacco leaves grown under long-term drought

Functional Plant Biology : FPB
Shin-Ichi MiyazawaChikahiro Miyake

Abstract

We compared the diffusion conductance to CO2 from the intercellular air space to the chloroplasts (internal conductance (g i)) between tobacco leaves acclimated to long-term drought (drought-acclimated (DA)) and those grown under sufficient irrigation (well-watered (WW)), and analysed the changes in g i in relation to the leaf anatomical characteristics and a possible CO2 transporter, aquaporin. The g i, which was estimated by combined analyses of CO2 gas exchange with chlorophyll fluorescence, in the DA plants was approximately half of that in the WW plants. The mesophyll and chloroplast surface areas exposing the intercellular air space, which potentially affect g i, were not significantly different between the WW and DA plants. The amounts of plasma membrane aquaporins (PIP), immunochemically determined using radish PIP antibodies, were unrelated to g i. After treatment with HgCl2, an aquaporin inhibitor, the water permeability of the leaf tissues (measured as the weight loss of fully-turgid leaf disks without the abaxial epidermis in 1 m sorbitol) in WW plants decreased with an increase in HgCl2 concentration. The g i in the WW plants decreased to similar levels to the DA plants when the detached leaflets were fed with 0.5 ...Continue Reading

References

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Citations

Mar 16, 2017·The New Phytologist·Yusuke OnodaMark Westoby
May 23, 2013·Physiologia Plantarum·Jorge GagoJaume Flexas
Apr 19, 2016·International Journal of Molecular Sciences·Francesca SecchiClaudio Lovisolo
Jul 22, 2016·F1000Research·Supratim BasuAndy Pereira
Nov 24, 2018·Plant, Cell & Environment·Yusuke MizokamiIchiro Terashima
Apr 28, 2009·Journal of Experimental Botany·Ulo NiinemetsCharles R Warren
Apr 28, 2009·Journal of Experimental Botany·John R EvansIchiro Terashima
Mar 11, 2011·Plant, Cell & Environment·Gregorio EgeaAntonio Diaz-Espejo
Jul 5, 2016·International Journal of Molecular Sciences·Adi Yaaran, Menachem Moshelion
Mar 4, 2009·Journal of Experimental Botany·Youshi TazoeJohn R Evans
Mar 17, 2009·Journal of Experimental Botany·Foteini HassiotouJohn R Evans
Jun 28, 2018·Journal of Plant Research·Shin-Ichi MiyazawaTakayuki Kawahara
Apr 1, 2016·Functional Plant Biology : FPB·Supriya TiwariTim Butler
Apr 16, 2021·Molecular Biology Reports·V K Dalal
Mar 20, 2021·Journal of Experimental Botany·Raed ElferjaniMebarek Lamara
Mar 30, 2021·Journal of Experimental Botany·Jaume FlexasMarc Carriquí

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