Morphological and physiological responses and drought resistance enhancement of ornamental shrubs by trinexapac-ethyl application

Elansary, Hosam O.; Salem, Mohamed Z. M.

doi:10.1016/j.scienta.2015.03.033

Cited by 33 publications

(23 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Viburnum and Polygala, in fact, showed different morphological adaptations to overcome the imposed drought stress, reducing leaf number and area, and dry biomass. These adaptations are similar to those found in roses [38], Callistemon [8,39], Spirea nipponica 'Snowmound', Pittosporum eugenioides 'Variegatum', Viburnum nadum [40], and some Mediterranean shrubs [41].…”

Section: Discussionsupporting

confidence: 78%

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

et al. 2019

View full text Add to dashboard Cite

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...

show abstract

Section: Discussionsupporting

confidence: 78%

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

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The effect of drought stress on plant growth and dry matter has been noticed in numerous ornamental species-for example, Pistacia [12], Spiraea, Pittosporum [19], Bougainvillea [20], Callistemon [21], Laurus, and Thunbergia [22] (Table 1). Since the photosynthetic pathways strongly influence the response to water stress, only the responses of C3 plants are presented in Table 1.…”

Section: Growth and Morpho-anatomical Modificationmentioning

confidence: 99%

“…'Lindleyana' shrubby vines C = substrate moisture close to container capacity and irrigation applied when 20% of the water was leached; deficit irrigation (DI), 25% of the amount of water supplied in C. Two-year-old plants Leaf, flower, total biomass dry weight, total leaf area (−); stomatal resistance (+); Ψl and Ψp (+); Stomatal length and width (−) [Spirea nipponica (S), Pittosporum eugenioides (P), Viburnum nudum (V) bushy shrubs 4 irrigation levels (100, 70, 50, and 25% of container capacity) and Trinexapac-ethyl (TE) treatments (0.1, 0.2, and 0.3 L ha −1 ) Plant heights 10 (S and V) and 40 cm (P) Leaf number and area (−), plant dry weight and height (−), root dry weight (+). A, E, and gs (−).The application of 0.2 and 0.3 L ha −1 TE enhanced S, P and V tolerance to drought stress[19]…”

mentioning

confidence: 99%

Response of Mediterranean Ornamental Plants to Drought Stress

2019

View full text Add to dashboard Cite

Ornamental plants use unique adaptive mechanisms to overcome the negative effects of drought stress. A large number of species grown in the Mediterranean area offer the opportunity to select some for ornamental purposes with the ability to adapt to drought conditions. The plants tolerant to drought stress show different adaptation mechanisms to overcome drought stress, including morphological, physiological, and biochemical modifications. These responses include increasing root/shoot ratio, growth reduction, leaf anatomy change, and reduction of leaf size and total leaf area to limit water loss and guarantee photosynthesis. In this review, the effect of drought stress on photosynthesis and chlorophyll a fluorescence is discussed. Recent information on the mechanisms of signal transduction and the development of drought tolerance in ornamental plants is provided. Finally, drought-induced oxidative stress is analyzed and discussed. The purpose of this review is to deepen our knowledge of how drought may modify the morphological and physiological characteristics of plants and reduce their aesthetic value-that is, the key parameter of assessment of ornamental plants.

show abstract

“…Gas exchange measurements were performed on fully expanded leaves, under clear, sunny conditions using a portable photosynthesis system analyzer (ADC BioScientific, LCi, Bioscientific, Ltd., Hoddesdon, UK) and included photosynthetic rate (A), transpiration rate (E), and stomatal conductance (gs). Leaf midday water potential and midday relative water content were calculated at the end of the experiments at noon following the methods of Elansary et al [17]. Leaf proline composition was also determined following the methods of Elansary et al [18].…”

Section: Morphological and Physiologicalmentioning

confidence: 99%

Effects of Water Stress and Modern Biostimulants on Growth and Quality Characteristics of Mint

et al. 2019

View full text Add to dashboard Cite

Natural biostimulants combine different elicitors that may influence economic properties of herbal crops, such as mint. Mint (Mentha longifolia L.) plants were subjected to three water levels based on container substrate capacity (CSC; 100% CSC, 70% CSC, and 50% CSC) and/or applications of four biostimulants (CRADLE™, Mobilizer™, Nanozim De’Lite™ [ND], and Nanozim NXT™ [NN]). ND and NN exhibited higher vegetative growth and root dry weight than the control (without biostimulants) and other treatments. NN produced the highest fresh and dry mint yields under all water levels. Irrigation water-use efficiency (IWUE) of NN was highest (2.78 kg m−3) with 70% CSC, whereas the control produced the lowest IWUE (1.85 kg m−3) with 100% CSC. Biostimulants boosted physiological and metabolic responses, including gas exchange, leaf water potential, relative water content, and proline accumulation of stressed plants. NN treatment with 70% CSC had the highest essential oil (EO) ratio (3.35%). Under 70% and 50% CSC with NN treatment, the proportion of 1,8-cineol increased and that of pulegone decreased in EOs. Increased antioxidant activities, reduced H2O2 levels, and increased catalase and superoxide dismutase activities were observed. Applications of ND and NN during water stress conditions increased economic and medicinal properties of mint EOs with applications in the agricultural and pharmaceutical industries.

show abstract

Morphological and physiological responses and drought resistance enhancement of ornamental shrubs by trinexapac-ethyl application

Cited by 33 publications

References 50 publications

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

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

Response of Mediterranean Ornamental Plants to Drought Stress

Effects of Water Stress and Modern Biostimulants on Growth and Quality Characteristics of Mint

Contact Info

Product

Resources

About