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- Title
Soil-Root Relationship in a Leaf Succulent Halophyte Suaeda vera from Differently Salt-Affected Habitats.
- Authors
Asghar, Naila; Hameed, Mansoor; Ahmad, Muhammad Sajid Aqeel; Ahmad, Farooq
- Abstract
Suaeda vera is a succulent halophyte that colonizes hypersaline soils. Ecotypic variability is extremely high. Plant roots are the first line of defense and respond instantly to soil salinity. In the present study, we collected 21 ecotypes from ecologically different habitats to explore the degree of salt tolerance, which can be proved extremely beneficial. This study was conducted to explore the alterations in root morphology, anatomy, and physiology likely to be associated with salinity tolerance. A mechanistic insight was developed to evaluate interaction of soil properties with root modifications toward enhancing survival and development under hypersaline conditions. Increase in salinity was associated with longer root, and, high root fresh and dry biomass. The highest shoot biomass and water contents were found in populations from highly saline habitat (ECe 36.33 to 55.51 dS m−1). Discrete anatomical variations such as reduced parenchymatous region thickness, increased sclerification in the stelar region, and broad metaxylem vessels were recorded at high salinities. The reduced or disintegrated primary tissues (epidermis, endodermis, and cortex) were found to be the main reason that supported the absorption of nutrient from soil-root and root to shoot. The salinity tolerance mechanism relied on root structural modification. The dominant traits enabling salinity tolerance of this species were much larger and fast-conducting metaxylem vessels that enhanced compartmentalization aboveground plant organs. Extensive sclerification in the stelar region involved in water conservation and mechanical strength of roots hence enabled this species to colonize hot arid and saline conditions.
- Subjects
HALOPHYTES; SUCCULENT plants; ANATOMICAL variation; WATER conservation; SOIL salinity; HABITATS; PLANT roots
- Publication
Water, Air & Soil Pollution, 2023, Vol 234, Issue 7, p1
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-023-06407-4