|
Effect of salinity tension on yield, concentration and distribution of some elements in different organs of two rice (Oriza sativa L.) cultivars
|
| |
|
|
|
Abstract: (2782 Views) |
In order to investigate of effect of salinity on ions accumulation in salt sensitive (IR29) and salt tolerant (FL485) rice genotypes, a factorial experiment based on completely randomized design with three replication was carried out in Karaj Biotechnology Research Institute in 2014. Seedlings of salt sensitive and salt tolerant were grown in Youshida nutrient solution culture and after 28 days, they were treated with two concentrations of zero and 100 milli Molar sodium chloride. Samples were collected from flag leaf, stem and panicles of each plant separately at zero, 7. 14, 21 and 28 days after applying the treatment and the concentration of sodium, potassium, chlorine, calcium and magnesium elements in each of the organs was measured individually. Result showed that under tension, the percentage of increase in sodium accumulation in flag leaf, cluster and stem of sensitive cultivar was 139, 71 and 121 percent than the control treatment and more than tolerant cultivar. Significant decrease was observed in potassium concentration of flag leaf, stem and panicles in both cultivars under salinity conditions. Salinity caused significant chlorine accumulation in flag leaf and stem of sensitive cultivar by the amount of 53 and 111 percent compared to control treatment. Significant decrease was observed in the concentration of chlorine in different tolerant cultivar organs, with the exception of stem in tension conditions. Under tension conditions, calcium accumulation in different parts of the tolerant cultivar was significantly more than sensitive cultivar. Upon application of saline treatment, the concentration of magnesium in leaf and leaf pods of both cultivars significantly decreased, while no significant changes were observed in panicle magnesium concentration of the two cultivars. Salinity caused a significant reduction in yield (48.4 percent) and grain yield components in sensitive cultivar, while the percentage of yield loss in the tolerant cultivar was not significant. The results showed that the FL485 genotype has the mechanism of reducing the rate of sodium and chlorine transfer to active parts of the plant, such as young leaves and panicles, thus prevents damage to these organs and prevents the significant reduction of yield. |
|
| Keywords: Tolerant, Sensitive, Flag leaf, Sodium and Chlorine. |
|
|
Full-Text [PDF 223 kb]
(3233 Downloads)
|
Type of Study: Applicable |
Subject:
Crop Physiology
Received: 2018/03/3 | Accepted: 2018/03/3 | Published: 2018/03/3
|
|
|
|
|
|
|
| Add your comments about this article |
|
|
|
