Comparative dehydration tolerance of foliage of several ornamental crops

Augé, Robert M.; Stodola, Ann J.W.; Moore, Jennifer L.; Klingeman, William E.; Duan, Xiangrong

doi:10.1016/s0304-4238(03)00037-2

Cited by 38 publications

(35 citation statements)

References 4 publications

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“…The RWC value at which a plant shows symptoms of a negative environmental impact depends on the species and can differ considerably depending on the taxon, its origin, and environmental conditions to which a given species is naturally adapted. As shown by Augé et al [19], the RWC value determined at wilting point in numerous ornamental plants varied considerably. The following species were most sensitive to soil water deficit: Impatiens walleriana -73% RWC at the moment of wilting, Dahlia hybrida -64% RWC, and Heuchera sanguinea -68% RWC.…”

Section: Date Of Observationmentioning

confidence: 92%

Effects of CaCl2 solutions to alleviate drought stress effects in potted ornamentals Salvia splendens and Ageratum houstonianum

2016

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Bedding plants are often subjected to soil water deficit -either after planting and/ or during the market chain. Methods to alleviate the negative water stress effects are sought for to preserve ornamental values of plants. The aim of this study was to evaluate the response of two bedding plants, Ageratum houstonianum Mill. and Salvia splendens Sellow ex Scult., to water stress and treatments with calcium chloride aimed to alleviate drought effects. Plants were subjected either to 45 days of periodical stress (five cycles when watering was off for 5 consecutive days, followed by four cycles on for 5 consecutive days) or 10 days of radical drought (complete water withdrawal). On the first day, before the onset of drought, plants were watered with 0.5% Ca or 1% Ca w/v as a solution of calcium chloride (5 g or 10 g Ca per 1 dm 3 of the growing substrate). The similarly Ca-treated but routinely watered plants provided controls to evaluate the water shortage effects. Plant height, inflorescence length/number, leaf number, leaf area (in Salvia splendens only), aboveground plant part weight, and root weight (in Salvia splendens only) as well as leaf relative water content (RWC) were measured at the beginning and at the end of the experiments. Water withdrawal during 10 days of growth (radical drought) reduced by half RWC in leaves of withering Salvia splendens and Ageratum hous tonianum plants. Its effects on the growth parameters were less pronounced and mitigated by Ca applications. Also in the periodically stressed plants of both species, RWC and most growth parameters were reduced by water shortage but Ca applications alleviated the negative stress effects.

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Section: Date Of Observationmentioning

confidence: 92%

Effects of CaCl2 solutions to alleviate drought stress effects in potted ornamentals Salvia splendens and Ageratum houstonianum

2016

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“…Prolonged drought markedly affects look of these shrubs by leaf wilting, colour defects and precocious fall-off, lower vegetative growth, phenological anomalies, and in extreme cases by branch/ plant die-back (Cameron et al, 2008;Augé et al, 2003). However, in case of soil water deficit after inflorescence initiation, rhododendrons flower sooner with richer inflorescence (Sharp et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Drought and frost tolerance in rhododendron collection of the Mlyňany Arboretum (Slovakia): a screening for future climate

2017

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Ferus, P., Hoťka, P., Konôpková, J., 2017. Drought and frost tolerance in rhododendron collection of the Mlyňany Arboretum (Slovakia): a screening for future climate. Folia Oecologica, Rhododendrons are jewels of the Mlyňany Arboretum, Institute of Forest Ecology of the Slovak Academy of Sciences (IFE SAS). Blossoming in May, they attract thousands of visitors. But recently these woody plants have much suffered from climatic extremes such as summer droughts and winter frosts, associated with the advancing climate change. To assess the rhododendron collection´s stability, its drought and frost injury level were tested in field, in summer 2015 and winter 2017, respectively. The tested parameters were: leaf wilting and electrolyte leakage combined with shrub leaf area, insolation level and overall health state. We found that the drought effect was strong or very strong in only ca. 30% rhododendron species and ca. 10% rhododendron cultivars, and that around 60% shrubs showed no or only moderate symptoms of water deficit. The drought injury level was only associated with the genotype. The most tolerant / sensitive genotypes, commonly occurring in the park, were: R. catawbiense, R. ponticum, R. smirnowii, cv. ´Boursault´, cv. ´Cunningham´s White´ and cv. ´Purpureum Elegans´ / R. fortunei and cv. ´Tamarindos´. On the other hand, the most frequent response to frost in the observed rhododendron genotypes was moderate injury (28 and 37% for species and cultivars, respectively), nevertheless more than 18% species and almost 6% cultivars exhibited strong frost damage. Despite absence of significant differences in the factor-response between the species, we may suggest this decreasing sequence of the genotypes ordered according to their frost resistance: genotypes: cv. ´Cunningham´s White´ > R. decorum > R. fortunei and cv. ´Duke of York´ > R. smirnowii > cvs. ´Purpureum Elegans´and ´Tamarindos´ > R. macrophyllum and cv. ´Nova Zembla´ > R. catawbiense > R. ponticum. These results have been compared with similar works in rhododendron species/cultivars as well as suggested species drought/frost tolerance derived from climatic conditions in the area of their natural distribution.

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“…Most of these companies have changed their focus on producing synthetically materials, but rely mostly on natural products (Burt, 2004;Lima et al, 2004). Such products are used for preparation of different commodities such as antiseptics, spices, fragrance for commercial purposes (Nguefack et al, 2004;Auge et al, 2003;Tan et al, 2002). Consequently, most medicinal, essential oil, flower and fragrance producing plants are subjected to extensive research for their products.…”

Section: Introductionmentioning

confidence: 99%

“…Some of these species have been recommended because of their strong affinity for digestive and metabolic processes as well as, respiration and blood formation (Sur et al, 1991;Sivropoulou et al, 1997;Dorman and Deans, 2000;Seaman, 2005;Kamatou et al, 2008;Dyubeni and Buwa, 2012). In literature, the Thymus vulgaris L, Ocimum sanctum, Salvia serotina, Acinos arvensis, Rosmarinus officinalis are few examples of species belonging to these families that have often been used to treat ailments associated with the weakness of vital centers such as diabetes, digestive problems, respiratory problems, and anaemia (Sivropoulou et al, 1997;Chalchat et al, 1998;Auge et al, 2003;Kamatou et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

A comparative study on essential oil yield and composition of rose-scented geranium (P. c. v. Rose) commercially grown on three different sites of the Amathole region in the Eastern Cape, South Africa

Lw¹,

Dyubeni²,

Mayekiso³

et al. 2012

Afr. J. Agric. Res.

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Comparative dehydration tolerance of foliage of several ornamental crops

Cited by 38 publications

References 4 publications

Effects of CaCl2 solutions to alleviate drought stress effects in potted ornamentals Salvia splendens and Ageratum houstonianum

Effects of CaCl2 solutions to alleviate drought stress effects in potted ornamentals Salvia splendens and Ageratum houstonianum

Drought and frost tolerance in rhododendron collection of the Mlyňany Arboretum (Slovakia): a screening for future climate

A comparative study on essential oil yield and composition of rose-scented geranium (P. c. v. Rose) commercially grown on three different sites of the Amathole region in the Eastern Cape, South Africa

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