New Ornamental Plants for Horticulture

Seaton, Kevin; Bettin, Andreas; Grüneberg, Heiner

doi:10.1007/978-94-017-8578-5_12

Cited by 10 publications

(7 citation statements)

References 31 publications

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“…Unsurprisingly, horticulturalists are continually searching for new plants with ‘unique’ features to be sold. Seaton, Bettin & Grüneberg (, p. 435) for instance wrote that ‘Introduction of new plants is critical to the survival and profitability of the horticultural industries’ in their article on how to find new plant species in the world's existing plant diversity. Furthermore, new molecular‐based breeding technologies have reached the horticultural industry (e.g.…”

Section: The Next Generation Of Invading Alien Horticultural Plantsmentioning

confidence: 99%

The changing role of ornamental horticulture in alien plant invasions

et al. 2018

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The number of alien plants escaping from cultivation into native ecosystems is increasing steadily. We provide an overview of the historical, contemporary and potential future roles of ornamental horticulture in plant invasions. We show that currently at least 75% and 93% of the global naturalised alien flora is grown in domestic and botanical gardens, respectively. Species grown in gardens also have a larger naturalised range than those that are not. After the Middle Ages, particularly in the 18th and 19th centuries, a global trade network in plants emerged. Since then, cultivated alien species also started to appear in the wild more frequently than non-cultivated aliens globally, particularly during the 19th century. Horticulture still plays a prominent role in current plant introduction, and the monetary value of live-plant imports in different parts of the world is steadily increasing. Historically, botanical gardens - an important component of horticulture - played a major role in displaying, cultivating and distributing new plant discoveries. While the role of botanical gardens in the horticultural supply chain has declined, they are still a significant link, with one-third of institutions involved in retail-plant sales and horticultural research. However, botanical gardens have also become more dependent on commercial nurseries as plant sources, particularly in North America. Plants selected for ornamental purposes are not a random selection of the global flora, and some of the plant characteristics promoted through horticulture, such as fast growth, also promote invasion. Efforts to breed non-invasive plant cultivars are still rare. Socio-economical, technological, and environmental changes will lead to novel patterns of plant introductions and invasion opportunities for the species that are already cultivated. We describe the role that horticulture could play in mediating these changes. We identify current research challenges, and call for more research efforts on the past and current role of horticulture in plant invasions. This is required to develop science-based regulatory frameworks to prevent further plant invasions.

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Section: The Next Generation Of Invading Alien Horticultural Plantsmentioning

confidence: 99%

The changing role of ornamental horticulture in alien plant invasions

et al. 2018

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“…Production of ornamental plants is an important branch of horticulture that is growing dynamically as a result of increasing wealth of developed societies [1]. Regular expansion of the offer with new species is the factor influencing the development of the ornamental plant market [2,3].…”

Section: Introductionmentioning

confidence: 99%

Foliar Application of Gibberellic Acid and Methyl Jasmonate Improves Leaf Greenness in Hesperantha coccinea (syn. Schizostylis coccinea), a Rare Ornamental Plant

Salachna

Łopusiewicz

Dymek

et al. 2020

The 1st International Electronic Conference on Plant Science

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Hesperantha coccinea (Iridaceaea) is a little-known ornamental plant recommended for cultivation in pots, gardens and for cut flowers. The species produces narrow, decorative green leaves that sometimes turn yellow as the plants begin to anthesis. A solution to the problem may be the application of plant growth regulators (PGRs), and so far none have been studied in Hesperantha cultivation. The study assessed the effect of foliar application of gibberellic acid solutions (GA3; 50,100 and 200 mg dm−3) and methyl jasmonate (MeJA; 100, 500 and 1000 µmol dm−3) on the leaf greenness index (SPAD index), leaf number, leaf length and leaf width of H. coccinea. Control plants were not treated with PGRs. It was found that both GA3 and MeJA applied at all tested concentrations significantly increased the greenness index of H. coccinea leaves. In addition, GA3 increased the number of leaves without affecting the length and width of the leaves. MeJA had a growth inhibitory effect. When compared to the control, plants sprayed with MeJA solutions produced fewer leaves that also had reduced length and width. These findings indicate that both regulators (GA3 and MeJA) positively affected plant quality by improving leaf greenness.

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“…Although breeders are creating new cultivars of existing ornamental taxa (Callaway & Callaway ), collectors are still looking for new potential ornamental plants in the wild around the world (Seaton et al. ). The demand for new ornamental plant taxa (Phelps & Webb ) has two potentially major negative consequences: it can pose a threat to the conservation of plant species through overharvesting and lead to the dissemination of potentially invasive species.…”

Section: Introductionmentioning

confidence: 99%

Level of environmental threat posed by horticultural trade in Cactaceae

Novoa

Roux

Richardson

et al. 2017

Conservation Biology

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Ornamental horticulture has been identified as an important threat to plant biodiversity and is a major pathway for plant invasions worldwide. In this context, the family Cactaceae is particularly challenging because it is considered the fifth most threatened large taxonomic group in the world; several species are among the most widespread and damaging invasive species; and Cactaceae is one of the most popular horticultural plant groups. Based on the Convention on International Trade in Endangered Species of Wild Flora and Fauna and the 11 largest online auction sites selling cacti, we documented the international cactus trade. To provide an in-depth look at the dynamics of the industry, we surveyed the businesses involved in the cactus trade in South Africa (a hotspot of cactus trade and invasions). We purchased seeds of every available species and used DNA barcoding to identify species to the genus level. Although <20% of this trade involved threatened species and <3% involved known invasive species, many species were identified by a common name. However, only 0.02% of the globally traded cacti were collected from wild populations. Despite a large commercial network, all South African imports (of which 15% and 1.5% were of species listed as threatened and invasive, respectively) came from the same source. With DNA barcoding, we identified 24% of the species to genus level. Based on our results, we believe that if trade restrictions are placed on the small proportion of cacti that are invasive and there is no major increase in harvesting of native populations, then the commercial trade in cactus poses a negligible environmental threat. However, there are currently no effective methods for easily identifying which cacti are traded, and both the illicit harvesting of cacti from the wild and the informal trade in invasive taxa pose on-going conservation challenges.

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New Ornamental Plants for Horticulture

Cited by 10 publications

References 31 publications

The changing role of ornamental horticulture in alien plant invasions

The changing role of ornamental horticulture in alien plant invasions

Foliar Application of Gibberellic Acid and Methyl Jasmonate Improves Leaf Greenness in Hesperantha coccinea (syn. Schizostylis coccinea), a Rare Ornamental Plant

Level of environmental threat posed by horticultural trade in Cactaceae

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