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| Authors | Chen, KM; Gong, HJ; Chen, GC; Wang, SM; Zhang, CL |
| Author Full Name | Chen, KM; Gong, HJ; Chen, GC; Wang, SM; Zhang, CL |
| Title | Up-regulation of glutathione metabolism and changes in redox status involved in adaptation of reed (Phragmites communis) ecotypes to drought-prone and saline habitats |
| Source | JOURNAL OF PLANT PHYSIOLOGY |
| Language | English |
| Document Type | Article |
| Author Keywords | adaptation; drought and saline habitats; glutathione metabolisrn; reed (Phragmites communis) ecotypes; redox balance |
| Keywords Plus | PENTOSE-PHOSPHATE PATHWAY; OXIDATIVE STRESS; HYDROGEN-PEROXIDE; ENZYMES; PLANTS; ANTIOXIDANT; PHOTOSYNTHESIS; PROTECTION; RESISTANCE; TRANSPORT |
| Abstract | The glutathione (GSH) metabolic characteristics and redox balance in three ecotypes of reed (Phragmites communis), swamp reed (SR), dune reed (DR), and heavy salt meadow reed (HSMR), from different habitats in desert regions of northwest China were investigated. The DR possessed the highest rate of GSH biosynthesis and metabolism with the lowest levels of total and reduced GSH and its biosynthetic precursors, gamma-glutamylcysteine (gamma-EC) and cysteine (Cys), of the three reed ecotypes. This suggests that a higher rate of GSH biosynthesis and metabolism, but not GSH accumulation, might be involved in the adaptation of this terrestrial reed ecotype to its dry habitat. The HSMR shared this profile although it exhibited the highest reduced thiol levels of the three ecotypes. Two key enzymes in the Calvin-cycle possessing exposed sulfhydryl groups, NADP(+)-dependent glyceraldehydes-3-phosphate dehydrogenase (G3PD) and fructose-1,6-bisphosphatase (FBPase), and other two key enzymes in the pentose-phosphate pathway (PPP), glucose-6-phosphate dehydrogenase (G6PDH) and 6-phosphogluconate dehydrogenase (6-PGD), had very similar activities in the three reed ecotypes. Compared to the SR, the DR and HSMR had higher ratios of NADPH/NADP(+) and NADH/NAD(+), indicating that a more reduced redox status in the plant cells might be involved in the survival and adaptation of the two terrestrial reed ecotypes to long-term drought and salinity, respectively. These results suggest that changes of GSH metabolism and redox balance were important components of the adaptation of reed, a hydrophilic plant, to more extreme dune and saline habitats. The coordinated up-regulations of the rate of GSH biosynthesis and metabolism and reduction state of redox status of plant cells, conferred on the plant high resistance or tolerance to long-term drought and salinity. |
| Author Address | Lanzhou Univ, Coll Life Sci, Lanzhou 730000, Peoples R China; Tianshui Normal Univ, Dept Biol, Tianshui 741000, Peoples R China |
| Reprint Address | Zhang, CL (corresponding author), Lanzhou Univ, Coll Life Sci, Lanzhou 730000, Peoples R China. |
| ResearcherID Number | Gong, Haijun/AAD-6731-2020 |
| ORCID Number | Gong, Haijun/0000-0001-8670-2959 |
| Times Cited | 25 |
| Total Times Cited Count (WoS, BCI, and CSCD) | 29 |
| Publisher | URBAN & FISCHER VERLAG |
| Publisher City | JENA |
| Publisher Address | BRANCH OFFICE JENA, P O BOX 100537, D-07705 JENA, GERMANY |
| ISSN | 0176-1617 |
| 29-Character Source Abbreviation | J PLANT PHYSIOL |
| ISO Source Abbreviation | J. Plant Physiol. |
| Publication Date | MAR |
| Year Published | 2003 |
| Volume | 160 |
| Issue | 3 |
| Beginning Page | 293 |
| Ending Page | 301 |
| Digital Object Identifier (DOI) | 10.1078/0176-1617-00927 |
| Page Count | 9 |
| Web of Science Category | Plant Sciences |
| Subject Category | Plant Sciences |
| Document Delivery Number | 664VY |
| Unique Article Identifier | WOS:000182084900009 |
| Plants associated with this reference |