Drought resistance evaluation of sugar beet germplasms by response of phenotypic indicators.
Plant Signal Behav
; 18(1): 2192570, 2023 12 31.
Article
in En
| MEDLINE
| ID: mdl-36966541
ABSTRACT
Sugar beet is a main sugar crop worldwide that often faces drought stress. The identification of drought tolerance of sugar beet germplasms is beneficial for breeding, but the research about it has been rarely reported. In this study, the drought tolerance of germplasms 92005-1, 94002-2 and 92021-1-1 was tested under simulated conditions. Seven days and 9% PEG treatment were the optimal conditions for evaluation, under which more phenotypic indicators showed significant difference in drought tolerance coefficient. The objective weighting and membership function method were established for evaluating the drought tolerance of different sugar beet germplasms. Drought stress decreased the biomass of leaves and roots of sugar beet germplasms. The drought-sensitive germplasm responded faster for leaf weight, root weight, plant height and root length. These indicators declined more significantly under long-term and severe stress. Increasing the root-shoot ratio and proline content were universal strategies of sugar beet germplasms to overcome drought stress. The drought-tolerant germplasms held higher peroxidase activity and better ability to scavenge reactive oxygen for preventing the damage.
Key words
Full text:
1
Database:
MEDLINE
Main subject:
Beta vulgaris
/
Drought Resistance
Language:
En
Journal:
Plant Signal Behav
Year:
2023
Type:
Article