%0 Journal Article %1 citeulike:11005932 %A Dahal, Keshav %A Gadapati, Winona %A Savitch, LeonidV %A Singh, Jas %A Hüner, NormanP %B Planta %D 2012 %I Springer-Verlag %J Planta %K citeulikeExport co2, crop, ma16, protein %N 5 %P 1639--1652 %R 10.1007/s00425-012-1710-2 %T Cold acclimation and BnCBF17-over-expression enhance photosynthetic performance and energy conversion efficiency during long-term growth of Brassica napus under elevated CO2 conditions %U http://dx.doi.org/10.1007/s00425-012-1710-2 %V 236 %X The effects of cold acclimation and long-term elevated CO 2 on photosynthetic performance of wild-type (WT) and BnCBF17 -over-expressing line of Brassica napus cv. Westar ( BnCBF17 -OE) grown at either 20/16 °C (non-acclimated) or 5/5 °C (cold acclimated) and at either ambient (380 μmol C mol −1 ) or elevated (700 μmol C mol −1 ) CO 2 were studied. Compared with non-acclimated WT, the BnCBF17 -OE grown at 20 °C mimicked the effects of cold acclimation on WT B. napus with respect to compact dwarf phenotype and increased rates of light-saturated CO 2 assimilation and photosynthetic electron transport. This was associated with enhanced energy conversion efficiency into biomass as assessed by decreased excitation pressure coupled to decreased dependence on non-photochemical energy dissipation for a given irradiance. Growth at elevated CO 2 decreased the light and CO 2 -saturated rates of photosynthesis by 30 \% for non-acclimated WT relative to growth at ambient CO 2 . This was associated with inhibition in electron transport rates (20 \%), decrease in amount of rbcL (35 \%) and cytosolic FBPase (70 \%) and increased excitation pressure and non-photochemical quenching in elevated versus ambient CO 2 -grown non-acclimated WT. In contrast, light and CO 2 -saturated rates of photosynthesis, electron transport, excitation pressure, non-photochemical quenching and levels of rbcL, cytosolic FBPase and Lhcb1 were insensitive to growth under elevated CO 2 in BnCBF17 -OE and cold-acclimated WT. Thus, BnCBF17 -over-expression and cold acclimation maintain enhanced energy conversion efficiency and reduced sensitivity to feedback-limited photosynthesis during long-term growth of B. napus under elevated CO 2 . Our results indicated that CBFs transcription factors regulate not only freezing tolerance but also has major whole plant effects.

@article{citeulike:11005932, abstract = {{The effects of cold acclimation and long-term elevated CO 2 on photosynthetic performance of wild-type (WT) and BnCBF17 -over-expressing line of Brassica napus cv. Westar ( BnCBF17 -OE) grown at either 20/16 °C (non-acclimated) or 5/5 °C (cold acclimated) and at either ambient (380 μmol C mol −1 ) or elevated (700 μmol C mol −1 ) CO 2 were studied. Compared with non-acclimated WT, the BnCBF17 -OE grown at 20 °C mimicked the effects of cold acclimation on WT B. napus with respect to compact dwarf phenotype and increased rates of light-saturated CO 2 assimilation and photosynthetic electron transport. This was associated with enhanced energy conversion efficiency into biomass as assessed by decreased excitation pressure coupled to decreased dependence on non-photochemical energy dissipation for a given irradiance. Growth at elevated CO 2 decreased the light and CO 2 -saturated rates of photosynthesis by 30 \% for non-acclimated WT relative to growth at ambient CO 2 . This was associated with inhibition in electron transport rates (20 \%), decrease in amount of rbcL (35 \%) and cytosolic FBPase (70 \%) and increased excitation pressure and non-photochemical quenching in elevated versus ambient CO 2 -grown non-acclimated WT. In contrast, light and CO 2 -saturated rates of photosynthesis, electron transport, excitation pressure, non-photochemical quenching and levels of rbcL, cytosolic FBPase and Lhcb1 were insensitive to growth under elevated CO 2 in BnCBF17 -OE and cold-acclimated WT. Thus, BnCBF17 -over-expression and cold acclimation maintain enhanced energy conversion efficiency and reduced sensitivity to feedback-limited photosynthesis during long-term growth of B. napus under elevated CO 2 . Our results indicated that CBFs transcription factors regulate not only freezing tolerance but also has major whole plant effects.}}, added-at = {2019-03-31T01:14:40.000+0100}, author = {Dahal, Keshav and Gadapati, Winona and Savitch, LeonidV and Singh, Jas and H\"{u}ner, NormanP}, biburl = {https://www.bibsonomy.org/bibtex/2748b3438923a0e8840c2e9adc4cc02c3/dianella}, booktitle = {Planta}, citeulike-article-id = {11005932}, citeulike-linkout-0 = {http://dx.doi.org/10.1007/s00425-012-1710-2}, citeulike-linkout-1 = {http://www.springerlink.com/content/6133350213222k3t}, citeulike-linkout-2 = {http://link.springer.com/article/10.1007/s00425-012-1710-2}, day = 31, doi = {10.1007/s00425-012-1710-2}, interhash = {87b8d33b516ad102eaf2c0115d664b1b}, intrahash = {748b3438923a0e8840c2e9adc4cc02c3}, issn = {0032-0935}, journal = {Planta}, keywords = {citeulikeExport co2, crop, ma16, protein}, month = jul, number = 5, pages = {1639--1652}, posted-at = {2016-01-14 02:30:04}, priority = {2}, publisher = {Springer-Verlag}, timestamp = {2019-03-31T01:16:26.000+0100}, title = {{Cold acclimation and BnCBF17-over-expression enhance photosynthetic performance and energy conversion efficiency during long-term growth of Brassica napus under elevated CO2 conditions}}, url = {http://dx.doi.org/10.1007/s00425-012-1710-2}, volume = 236, year = 2012 }