Response of mannitol-producing Arabidopsis thaliana to abiotic stress

Functional Plant Biology : FPB
Christine M SicklerW. H. Loescher

Abstract

In celery, mannitol is a primary photosynthetic product that is associated with celery's exceptional salt tolerance. Arabidopsis plants transformed with celery's mannose-6-phosphate reductase (M6PR) gene produce mannitol and grow normally in the absence of stress. Daily analysis of the increase in growth (fresh and dry weight, leaf number, leaf area per plant and specific leaf weight) over a 12-day period showed less effect of salt (100 mm NaCl) on the M2 transformant than wild type (WT). Following a 12-day treatment of WT, M2 and M5 plants with 100 or 200 mm NaCl the total shoot fresh weight, leaf number, and leaf area were significantly greater in transformants than in WT plants. The efficiency of use of energy for photochemistry by PSII was measured daily under growth conditions. In WT plants treated with 100 mm NaCl, the PSII yield begin decreasing after 6 days with a 50% loss in yield after 12 days, indicating a severe loss in PSII efficiency; whereas, there was no effect on the transformants. Under atmospheric levels of CO2, growth with 200 mm NaCl caused an increase in the substomatal levels of CO2 in WT plants but not in transformants. It also caused a marked decrease in carboxylation efficiency under limiting levels of...Continue Reading

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Citations

Feb 19, 2014·Biometals : an International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine·Yufeng SongZhenguo Shen
Apr 21, 2017·Critical Reviews in Biotechnology·Meng-Yao LiAi-Sheng Xiong
Sep 8, 2017·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Heba Ibrahim Mohamed, Hanan Helmy Latif
May 1, 2008·Annual Review of Plant Biology·Rana Munns, Mark Tester
Dec 2, 2014·TheScientificWorldJournal·Tengale Dipak BhausoManchikatla Venkat Rajam
May 28, 2014·Molecular Genetics and Genomics : MGG·Kenia de CarvalhoDouglas S Domingues
Jan 29, 2014·The New Phytologist·Patricia V Ellsworth, Leonel S L Sternberg
Dec 1, 2011·Functional Plant Biology : FPB·Andrew Merchant, Andreas A Richter
Jan 5, 2019·Environmental Science and Pollution Research International·Ume HabibaParvaiz Ahmad
Sep 11, 2013·BMC Plant Biology·Padmaja NagabhyruChristopher L Schardl

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