Identification of ornamental shrubs tolerant to saline aerosol for coastal urban and peri-urban greening

Farieri, Elisa; Toscano, Stefania; Ferrante, António; Romano, Daniela

doi:10.1016/j.ufug.2016.02.014

Cited by 17 publications

(12 citation statements)

References 61 publications

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“…This parameter also did not show wide variation in the previous experiment conducted by Farieri et al [32], indicating that the plants, even in conditions of saline aerosol, were able to preserve leaf functionality.…”

Section: Discussionmentioning

confidence: 45%

“…The growth reduction of plants, and hence the lower plant biomass, represents the final expression of a number of processes analyzed to determine salt and water stress tolerance [28,32,42]. In our study, in both species, the severe drought stress (20% WC and 10% WC) led in particular to a decrease of the shoot dry biomass.…”

Section: Discussionmentioning

confidence: 57%

“…80; 22]. This demonstrates that the damage of the foliar tissues is not irreversible, that PSII was not permanently damaged [32], and that the chloroplasts of Mediterranean species are able to adopt different mechanisms during drought stress conditions to avoid photo-inhibitory processes, such as the mechanism to dissipate the reducing power produced by the PSII.…”

Section: Discussionmentioning

confidence: 94%

“…The species is considered as a low water-use plant [28,29] and is able to grow in regions with mild winters [30].Both species are widespread in the Mediterranean area of Italy, in gardens and green areas, because of their ornamental value and adaptability to many environmental conditions. Different studies were carried out on Viburnum to investigate on salt stress response [28,31], but little information is available in terms of growth parameters, photosynthetic efficiency, leaf functional anatomical traits in drought stress conditions.These two species were chosen on the basis of our previous studies [32]; Polygala myrtifolia L. and Viburnum tinus L. 'Lucidum' were found, respectively, to be moderately sensitive and sensitive to salinity. Since salinity and drought stresses share important adaptation strategies, this work was carried out to verify if unavailability of water activates the same adaptation strategy observed under salinity stress.…”

mentioning

confidence: 99%

“…These two species were chosen on the basis of our previous studies [32]; Polygala myrtifolia L. and Viburnum tinus L. 'Lucidum' were found, respectively, to be moderately sensitive and sensitive to salinity. Since salinity and drought stresses share important adaptation strategies, this work was carried out to verify if unavailability of water activates the same adaptation strategy observed under salinity stress.…”

mentioning

confidence: 99%

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Effects of Water Stress on Gas Exchange, Water Relations and Leaf Structure in Two Ornamental Shrubs in the Mediterranean Area

et al. 2019

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One of the main problems in the Mediterranean area is the long dry season, and hence there is a need to individuate plants that are tolerant to low water availability. The mechanisms adopted by different plant species to overcome drought stress conditions and reduce water loss could allow the identification of tolerant species to drought stress, thereby increasing the sustainability of ornamental plant utilization in green areas. In this regard, the aim of this study was to investigate the morphological, physiological, and anatomical responses of Polygala myrtifolia L. and Viburnum tinus L. 'Lucidum' irrigated under different irrigation deficits. In pot plants, four water regimes were adopted (10%, 20%, 30% and 40% of water container capacity (WC)). Drought stress significantly reduced the biomass accumulation in both shrubs. In Viburnum, total dry biomass reduction was observed only in 10% WC with a reduction by 33%, while in Polygala, this was observed both in 20% WC and 10% WC (~48%). The higher deficit irrigation conditions improve the root-to-shoot ratio, which was increased in Polygala 20% WC (by 20%) but not in Viburnum ones. The latter species shows higher drought tolerance, as demonstrated by the gas exchange values, chlorophyll fluorescence, leaf structure, and water relationship.Mediterranean native shrub species to water stress [5], also allowing the identification of new ornamentals suitable for sustainable landscaping. The ability of Mediterranean shrubs to tolerate severe drought conditions, one of the main factors affecting plant survival and species distribution, increases their use in the revegetation of semiarid areas [6].Different species growing in Mediterranean areas could provide good candidates for ornamental plants regarding their tolerance to water shortages. Drought stress harms aesthetic aspects and consequently affects ornamental plant quality. The latter in fact mainly depends on visual appearance, identified as leaf size and color, flower characteristics, number and longevity [7]. Drought stress can also dramatically reduce plant survival after transplantation with high economic losses and impacts on the aesthetic quality of green areas [8].The successful establishment of ornamental green areas in Mediterranean regions can be achieved through the adequate selection of plant species characterized by a high tolerance to water stress [9]. Tolerant plants are those plants that have the ability to modify their metabolism to guarantee vital and essential physiological processes with a limited amount of water [10]; most of them are Mediterranean-native species.Drought-tolerant plants are able to modify, during water stress conditions, their morphology and to activate physiological and biochemical processes able to cope with water deficit [11,12]. The morphological modifications linked to drought stress reduce shoot and leaf growth, although the modality and the intensity of these phenomena depend on the genotypes, even within the same species [12]. Previous results showed that in Lantana c...

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Section: Discussionmentioning

confidence: 45%

Section: Discussionmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 94%