Variation in morpho-physiological, biochemical and molecular responses of two Eucalyptus species under short-term water stress

Abstract

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.

Interactions between hydrogen sulphide and rhizobia modulate the physiological and metabolism process during water deficiency‐induced oxidative defense in soybean

“…Water deficiency has negative effects on plant growth and development, which further reduces plant production (Ashraf, 2010;Parvin et al, 2019). These negative effects are mainly caused by the imbalance in water metabolism and oxidative damage induced by water deficiency (Amrutha et al, 2019).…”

“…Water deficiency has negative effects on plant growth and development, which further reduces plant production (Ashraf, 2010; Parvin et al, 2019). These negative effects are mainly caused by the imbalance in water metabolism and oxidative damage induced by water deficiency (Amrutha et al, 2019). Significant changes in plant growth, photosynthesis, biomass production, enzymatic activity and oxidative damage parameters have been found in plants under drought conditions (Aref et al, 2013; Cotado et al, 2020; Husen et al, 2017; Matos et al, 2010).…”

Interactions between hydrogen sulfide and rhizobia modulate the physiology and metabolism during water deficiency-induced oxidative defense in soybean

“…Water deficiency has negative effects on plant growth and development, which further reduces plant production (Ashraf, 2010;Parvin et al, 2019). These negative effects are mainly due to the imbalance of water metabolism and oxidative damage induced by water deficiency (Amrutha et al, 2019). A significant change in plant growth, photosynthesis, biomass production, enzymatic activity, and oxidative damage parameters has been found in plants under drought conditions (Aref et al, 2013;Cotado et al, 2020;Husen et al, 2017;Matos et al, 2010).…”

Anatomical, physiological, biochemical and molecular responses of Eucalyptus spp. under water deficit conditions and characteristics of Tunisian arid species: an overview

“…For instance, the species of subgenus Symphyomyrtus are widely distributed across the continent, particularly in more arid habitats and regions subject to prolonged periods of water deficiency (Merchant et al, 2006). It regroups various species that are adapted to water shortage conditions, especially E. grandis, E. urophylla, E. globulus, E. camaldulensis and their hybrids and account for 80% of plantations globally (Amrutha et al, 2019). Other Eucalyptus species had screened also for their tolerance to drought such as E. behriana, E. microcarpa and E. polyanthemos (Myers and Neales, 1986); E. microtheca (Tuomela, 1997;Li, 1998), E. camaldulensis (Lemcoff et al, 1994;Farrell et al, 1996;White et al, 2000); E. nitens (White et al, 1996), E. melliodora (Clayton-Greene, 1983), E. grandis, E. viminalis and E. tereticornis (Lemcoff et al, 1994) , E.…”