Search published articles


Showing 2 results for Salt Stress
A Study into the Effects of Salt Stress on Germination Components of Different Wheat (Triticum aestivum) Cultivars
Ali Namvar, Raouf Seyed Sharifi, Hashem Hadi,
Volume 4, Issue 2 (3-2018)
Abstract

In order to study the effects of different levels of salinity on germination components of wheat cultivars, a factorial experiment was conducted based on a completely randomized design with three replications. Experimental factors were wheat cultivars at eight levels (Saysons, Gaspard, Finkan, MV-17, Chamran, Sardari, Atila-4 and Azar-2) and six levels of salinity (0, 25, 50, 100, 150 and 200 mM NaCl). The results indicated that salinity had significant effects on all of the traits studied (i.e., radicle length and dry weight, plumule length and dry weight, remaining seed weight after germination, seedling weight, the longest radicle and plumule, number of radicle per seed, ratio of radicle weight to plumule weight and rate, and uniformity and percentage of germination). All of these traits declined with an increase in the salinity (except the ratio of radicle weight to plumule weight, remaining seed weight after germination and seedling weight). The highest ratio of radicle weight to plumule weight, remaining seed weight after germination and seedling weight were recorded in the salinity of 200 mM NaCl. The cultivars showed significant effects on all of the traits studied (except remaining seed weight after germination and seedling weight). Chamran cultivar showed the highest number of radicle per seed, the ratio of radicle weight to plumule weight, rate and percentage of germination. The highest radicle length and the longest radicle were obtained from the Sardari cultivar while in Azar-2 cultivar it was vice versa in plumule. Atila-4 cultivar showed the highest radicle and plumule weight. It seems that compared with other cultivars, out of the cultivars studied, Chamran, Azar-2, Sardari and Atila-4 were more resistant to salinity stress.

 
 Highlights:

  1. Introduction of wheat cultivars with more tolerance to salinity conditions at germination stage.
  2. Study of eight different wheat cultivars in terms of germination indices under salinity stress conditions.

Salinity stress tolerance in Iranian spring wheat cultivars during germination
Ronak Talebi Qormik, Hadi Alipour, Reza Darvishzadeh,
Volume 11, Issue 1 (9-2024)
Abstract
Extended abstract
Introduction: The germination stage in plants, including wheat, is a susceptible stage to biotic and abiotic stresses. Establishing the plant in the early stages of growth, especially in the germination stage, is always very important. Salinity stress is one of the abiotic stresses that cause much damage yearly, especially in arid and semi-arid regions. Therefore, the identification and use of tolerant cultivars to salinity stress is one of the effective ways to reduce the negative effects of salinity stress.
Materials and Methods: In the present study, the response of 64 spring wheat cultivars at the germination stage in two levels of salinity stress (zero as a control and 12 dS/m of sodium chloride) with two replications was investigated in the form of a simple lattice design in the Genetics Laboratory of the Faculty of Agriculture, Urmia University. During seven days, the characteristics of germination percentage, germination index, germination rate, germination energy, seedling vigor, mean germination time, and mean germination rate, and after the seventh day the characteristics of seedling length, shoot length, root length, ratio of shoot length to root length, seedling fresh weight, and seedling dry weight were measured.
Results: Among the studied cultivars, in terms of all traits including radicle length, shoot length, seedling length, fresh weight, dry weight, radicle to shoot length ratio, germination index, germination rate, germination energy, germination percentage, seedling vigor, mean germination time, and mean germination rate a statistically significant difference was observed at the probability level of 1%. Based on the results of factor analysis, in both normal conditions and salinity stress, the studied traits were grouped into four main factors, and these four factors explained 92.74% of the changes in normal conditions and 93.85% in salinity stress conditions. Using cluster analysis, cultivars were grouped into three and two clusters under normal and salinity stress conditions, respectively.
Conclusions: Based on the results of bi-plot and cluster analysis, the cultivars Moghan 2, Bistun, Akbari, Moghan 3, Dastjardi, Marvdasht, Gahar, and Mahdavi are the preferred cultivars and the cultivars Darya, Bam, Tajan, Sistan, Frontana, Kavir, and Afogh were introduced as undesirable cultivars in terms of traits measured in this experiment, which can be used in breeding projects.

Highlights:
  1. A large number of spring wheat cultivars have been investigated in relation to salinity tolerance.
  2. Mahdavi, Dastjardi, Bistun, Akbari, Moghan 2, Moghan 3, Gahar, and Marvdasht cultivars were identified as tolerant to salinity stress in the germination stage.

Page 1 from 1     

© 2024 CC BY-NC 4.0 | Iranian Journal of Seed Research

Designed & Developed by : Yektaweb


This work is licensed under a Creative Commons Attribution 4.0 International License.