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| Content Provider | Springer Nature Link |
|---|---|
| Author | Habibi, G. |
| Copyright Year | 2014 |
| Abstract | This paper reports the effects of silicon (Si) supplementation (0.35 g Na$_{2}$SiO$_{3}$/kg soil, 2.73 mmol Si/kg soil) on some physiological characteristics of canola (Brassica napus L. cv. Okapi) plants grown in pots and treated with or without Si under water stress for 25 days. In this study, Si-supplied plants showed the higher shoot dry weight (SDW), root dry weight (RDW), relative growth rate (RGR), net assimilation rate (NAR), and relative water content (RWC) as compared to those without application of Si under drought conditions. However, Si did not significantly affect dry weight accumulation under well-watered conditions. CO$_{2}$ absorbance (A) was increased by silicon under water stress conditions. The intracellular CO$_{2}$ concentration (C $_{i}$), which was significantly elevated under water stress, was decreased by Si. Silicon application significantly increased the root amino acid content after 20 and 25 days of water stress. In Si-supplemented water-deficit plants, the amount of MDA remained unchanged after 25 days of water stress, obviously because of an efficient scavenging following significant enhancement of superoxide dismutase (SOD) and peroxidase (POD) activities. These results indicated that Si ameliorated growth reduction of drought-stressed canola plants, accompanied by an increase in the root water uptake through the formation of more fine roots and more amino acids as osmotica for supporting water uptake. The results of this study revealed that Si application alleviated water stress damages because of the higher water uptake, better photosynthetic rate, and the lowered lipid peroxidation in canola plants. |
| Starting Page | 784 |
| Ending Page | 791 |
| Page Count | 8 |
| File Format | |
| ISSN | 10214437 |
| Journal | Russian Journal of Plant Physiology |
| Volume Number | 61 |
| Issue Number | 6 |
| e-ISSN | 16083407 |
| Language | English |
| Publisher | Pleiades Publishing |
| Publisher Date | 2014-10-12 |
| Publisher Place | Moscow |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Brassica napus antioxidant defense system CO$_{2}$ absorbance sodium silicate water stress Plant Physiology Plant Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science |
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