Liua, M. and Qiao, Z. and Zhanga, S. and Wanga, Y. and Lua, P.
(2015)
Response of broomcorn millet (Panicum miliaceum L.)
genotypes from semiarid regions of China to salt stress.
Crop Journal, 3.
pp. 52-66.
![[img]](http://eprints.icrisat.ac.in/14611/1.hassmallThumbnailVersion/CropJournal_3_52-66_2015.pdf)  Preview |
|
PDF (This is an Open Access Article)
- Published Version
| Preview
|
Abstract
Salt tolerance of crops is becoming more and more important, owing to the constant
increase of salinity in arid and semi-arid regions. Broomcorn millet (Panicum miliaceum L.),
generally considered tolerant to salinity, can be an alternative crop for salt affected areas.
To assess genotypic variation for vegetative-stage salinity tolerance, 195 broomcorn millet
accessions from a core collection were evaluated for germination percentage, shoot length,
and root length during germination in 8 mL of deionized water (control) or 8 mL of a
120 mmol L−1 salt solution (treatment). Six genotypes with different levels of salt tolerance
were selected based on the growth parameters and ion concentrations in plant at the
seedling stage and used for confirmation of the initial salinity response. Substantial
variation for salinity tolerance was found on the basis of salt damage index [(germination
percentage under control − germination percentage under salinity) / germination percentage
under control × 100, SDI] and 39 accessions exhibited strong salt tolerance with SDI
lower than 20%. The salt tolerance performance of the genotypes was generally consistent
across experiments. In the seedling growth study, seedling number, root length and
belowground biomass were adversely affected (showing more than 70%, 50%, and 32%
reduction, respectively) in sensitive genotypes compared to tolerant genotypes (35%, 31%,
and 3% reduction, respectively) under 160 mmol L−1 NaCl treatment. In general,
whole-plant salinity tolerance was associated with increased Na+ concentration and Na+/
K+ ratio, and salt-tolerant genotypes often had higher root and lower shoot Na+
concentration than sensitive ones. Na+ concentration in root was closely related to salt
tolerance and may be considered as a selection criterion for screening salt tolerance of
broomcorn millet at the seedling or vegetative stages.
| Item Type: |
Article
|
| Uncontrolled Keywords: |
Salinity tolerance, Genetic variation,
Ion response, Broomcorn millet |
| Author Affiliation: |
Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China |
| Subjects: |
Crop Improvement |
| Divisions: |
Millet |
| Depositing User: |
Mr T L Gautham
|
| Date Deposited: |
06 Dec 2016 07:34 |
| Last Modified: |
06 Dec 2016 07:34 |
| URI: |
http://eprints.icrisat.ac.in/id/eprint/14611 |
Actions (login required)
 |
View Item |
