Variation in morpho-physiological, biochemical and molecular responses of two Eucalyptus species under short-term water stress
| Autor: | Muthusamy Muthupandi, V. Sivakumar, Abdul Bari Muneera Parveen, Sivanantham Amrutha, Modhumita Ghosh Dasgupta, Raman Nautiyal |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0303 health sciences Specific leaf area fungi Plant Science Biology Photosynthesis 01 natural sciences Eucalyptus 03 medical and health sciences chemistry.chemical_compound Horticulture Water potential chemistry Shoot Proline Abscisic acid Water content Ecology Evolution Behavior and Systematics drought stress leaf temperature osmotin sugars transcription factors 030304 developmental biology 010606 plant biology & botany |
| Zdroj: | Acta Botanica Croatica Volume 78 Issue 2 |
| ISSN: | 1847-8476 0365-0588 |
| Popis: | The genus Eucalyptus occurs in a wide range of environmental conditions, including rainforests, subal-pine, arid/semi-arid and moist temperate zones. It includes species with the capacity to cope with extremely low water potential. This study aims to screen water stress tolerance in two Eucalyptus species under nursery conditions. Inter-specific variation in morphological, physiological, biochemical and molecular parameters in two Eucalyptus species (E. tereticornis and E. camaldulensis) with contrasting levels of tolerance to progressive short term water-deprived condition was evaluated. Water stress reduced growth measured in terms of root:shoot ratio and specific leaf area (SLA), photosynthetic parameters, leaf water potential and relative water content (RWC) in both genotypes. Biochemical parameters including total sugars, phenol, phytohormones (indole acetic acid and abscisic acid) and proline were found to significantly increase during stress in both genotypes. Water responsive transcripts like osmotin and DREB/CBF registered significant expression variation in the two genotypes, suggesting their key role in regulating water stress tolerance in Eucalyptus. |
| Databáze: | OpenAIRE |
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