Hydroponic Screening for Iron Deficiency Tolerance in Evergreen Azaleas

Demasi, Sonia; Caser, Matteo; Kobayashi, Nobuo; Kurashige, Y.; Scariot, Valentina

doi:10.15835/nbha.43.1.9929

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…Importantly, the pH values reported in the HWSD database are soil-water pH, which is approximately 0.9 unit higher than pH in 1 M KCl ( Kabala et al, 2016 ). The results are in accordance with the general trend that Rhododendron cannot grow well in neutral or alkaline soils and is considered to be a calcifugous genus ( Kinsman, 1999 ; Demasi et al, 2015a ). Kinsman (1999) reported that at almost all sites in Northwest Yunnan where Rhododendron s grow in shallow soils overlying limestone, the soils still had pH values of less than 6.…”

Section: Discussionsupporting

confidence: 89%

“…R. x pulchrum is a well-known taxon for landscaping and breeding. It’s cultivar R. x pulchrum ‘Sen-e-oomurasaki’ showed extremely low chlorosis and mortality rates and high ferric chelate reductase activity in high pH hydroponic conditions, resulted in iron efficient genetic resources for azalea cultivation and gardening in calcareous soils ( Demasi et al, 2015a , b ).…”

Section: Discussionmentioning

confidence: 99%

“…Although rhododendrons are of high ornamental value, they are typically recognized as calcifugous plants (which cannot grow well on lime/calcareous soils), and they usually grow well in soils with pH of 4.5 to 6.0 ( Kinsman, 1999 ). Rhododendrons growing in pH-neutral or alkaline soils frequently suffer from iron (Fe) deficiency chlorosis symptoms: interveinal chlorosis in newly formed leaves, shoot and root growth reduction, leaf wilting, defoliation, and finally, plant death ( Demasi et al, 2015a ). Fe deficiency may be caused by physical or chemical properties of lime soils, which contain high bicarbonate (HCO 3 - ) concentrations in their soil solution ( Mengel, 1994 ).…”

Section: Introductionmentioning

confidence: 99%

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Prediction of Lime Tolerance in Rhododendron Based on Herbarium Specimen and Geochemical Data

et al. 2018

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Rhododendrons are typically known to be calcifuges that cannot grow well in lime soils. Data on lime tolerance of different taxa in Rhododendron are scarce. Habitats of naturally distributed specimens of genus Rhododendron were compiled as Chinese text-based locations from the Chinese Virtual Herbarium. The locations were then geocoded into latitude/longitude pairs and subsequently connected to soil characteristics including pH and CaCO3 from the Harmonized World Soil Database (HWSD). Using the upper quartile values of pH > 7.2 and CaCO3 > 2% weight in topsoil as threshold, we predicted the lime tolerant taxa. A dataset of 31,146 Rhododendron specimens including the information on taxonomy, GPS locations and soil parameters for both top- and subsoil was built. The majority of the specimens were distributed in soils with moderately acidic pH and without presence of CaCO3. 76 taxa with potential lime tolerance were predicted out of 525 taxa. The large scale data analysis based on combined data of geocoded herbarium specimens and HWSD allows identification of valuable Rhododendron species, subspecies or botanical varieties with potential tolerance to lime soils with higher pH. The predicted tolerant taxa are valuable resources for an in-depth evaluation of lime tolerance or for further use in horticulture and breeding.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Prediction of Lime Tolerance in Rhododendron Based on Herbarium Specimen and Geochemical Data

et al. 2018

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Azalea

Riek

Keyser

Calsyn

et al. 2018

Handbook of Plant Breeding

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Floriculture and territory – the protection of the traditional Italian tipicity: the case of “La Camelia del Lago Maggiore (PGI)”

Caser¹,

Berruti²,

Bizioli³

et al. 2018

Acta Hortic.

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European Union legislation reserves specific labelling for typical products of a particular quality by offering three quality schemes: Protected Denominations of Origin (PDO), Protected Geographical Indications (PGI) and Traditional Specialities Guaranteed (TSG). PDO and PGI concern products characterized by a defined bond to a particular 'milieu géographique' and bearing a geographical trade name, consolidating the product on the market. Thus, both PDO and PGI certify the existence of a link between a product and its place of origin, yet the two differ with regard to the intensity of such a bond. The camellias of the Lake Maggiore area represent an example of a typical product of floriculture that needs to be protected and enhanced. In the first half of the 19th century, Europeans became enamoured with camellias and they were imported and planted in gardens and parks, in the many pedoclimatically suitable environmental niches, with particular regard to some Italian areas. This flowering plant was successfully introduced on the shores of the Lake Maggiore (Piedmont, Italy). For nearly two hundred years local growers have developed expertise on camellia cultivation but have recently been very open to experimenting. We hereby present the story behind the strategic decisions that are leading a consortium of growers and processing firms from the lake Maggiore area to enroll the typical local camellias, i.e. "La Camelia del Lago Maggiore (PGI)", for registration at the Community register of PGI. Major steps prior to enrollment have consisted first in a historical, archival and bibliographical research about the introduction and the cultivation of camellias in this area. After that, the characteristics that make this local product qualitatively different from those produced in other areas of the world have been identified. In addition, the typical cultivation protocol has been outlined through technical meetings and structured interviews to the growers.

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Hydroponic Screening for Iron Deficiency Tolerance in Evergreen Azaleas

Cited by 3 publications

References 13 publications

Prediction of Lime Tolerance in Rhododendron Based on Herbarium Specimen and Geochemical Data

Prediction of Lime Tolerance in Rhododendron Based on Herbarium Specimen and Geochemical Data

Azalea

Floriculture and territory – the protection of the traditional Italian tipicity: the case of “La Camelia del Lago Maggiore (PGI)”

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