Intraspecific variation of Haloxylon salicornicum (Amaranthaceae) seed germination under salinity and simulated drought

Haloxylon salicornicum (Moq.) Bunge ex Boiss. is a suitable species for desert and coastal restoration for its forage production and dune stabilization. Inter-population variation of seed parameters has previously received little attention. Variation in seed germination response to drought and salin...

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Bibliographic Details
Published in:Arid land research and management 2021-07, Vol.35 (3), p.330-345
Main Authors: Bhatt, Arvind, Souza-Filho, Paulo R. M., Gallacher, David
Format: Article
Language:English
Subjects:
Arabian
desert
Drought
Dune stabilization
Germination
Parameters
Population characteristics
Population studies
Populations
Restoration
Revegetation
Salinity
Salinity effects
Seed germination
seed variation
Seeds
Simulation
Sodium chloride
Species
Stress
Survival
Variation
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Summary:Haloxylon salicornicum (Moq.) Bunge ex Boiss. is a suitable species for desert and coastal restoration for its forage production and dune stabilization. Inter-population variation of seed parameters has previously received little attention. Variation in seed germination response to drought and salinity stress was evaluated for three Kuwaiti populations for use in restoration projects. Germination parameters varied significantly among populations. Seeds from Kabd were larger and germinated at a higher percentage than the other two populations, Mutla and Liya, under conditions of saline (62.8%, 40.0%, and 50.7% respectively) and moisture (58.2%, 32.6%, and 45.6%) stress. Increasing salinity and drought simulation progressively inhibited seed germination across all populations. Drought simulation by PEG 6000 inhibited germination from −0.3 MPa, while salinity affected the germination proportion from 400 mM NaCl for all the studied populations. All populations exhibited a high recovery from NaCl and PEG stress, indicating the species is broadly adapted to survival through drought and saline conditions. Our findings indicate that revegetation success with this species will be influenced by the population characteristics of the maternal seed source.
ISSN:1532-4982
1532-4990
DOI:10.1080/15324982.2020.1869862