Concomitant effects of mercuric chloride on mesophyll conductance and carbonic anhydrase activity in Populus trichocarpa Torr. & Gray
| Autor: | Mina Momayyezi, Robert D. Guy |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Populus trichocarpa Stomatal conductance Physiology Plant Science Photosynthesis 01 natural sciences Chloride Petiole (botany) 03 medical and health sciences chemistry.chemical_compound Carbonic anhydrase Botany medicine Chlorophyll fluorescence Ecology biology Chemistry Forestry biology.organism_classification 030104 developmental biology Chlorophyll biology.protein 010606 plant biology & botany medicine.drug |
| Zdroj: | Trees. 32:301-309 |
| ISSN: | 1432-2285 0931-1890 |
| Popis: | Mercuric chloride, an inhibitor of CO2 transport via aquaporins, reduces mesophyll conductance in black cottonwood, and more so in northern than in southern genotypes, and it also reduces carbonic anhydrase activity. To investigate the potential involvement of aquaporins (AQPs) in latitude-dependent variation in mesophyll conductance (g m) of Populus trichocarpa Torr. & Gray (black cottonwood), photosynthetic susceptibility to mercuric chloride (HgCl2; a chemical inhibitor for AQPs) was tested in three northern and three southern representative cottonwood genotypes. The chlorophyll fluorescence method combined with a gas exchange system, was used to estimate g m in leaves under distilled water (control) and 1.5 mM aqueous HgCl2 fed through the petiole. Compared to the control, in both northern and southern genotypes photosynthetic rate (A n), g m, stomatal conductance (g s) and chloroplast CO2 concentration (C c) decreased significantly under HgCl2 (P |
| Databáze: | OpenAIRE |
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