Screening for broad mite susceptibility in Rhododendron simsii hybrids

Luypaert, Gil; Huylenbroeck, Johan Van; Riek, Jan De; Clercq, Patrick De

doi:10.1007/bf03356521

Cited by 13 publications

(12 citation statements)

References 12 publications

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“…A small number of 20 mites or less can cause serious economic damage in crops such as pepper [8,9], cucumber [10], lime [9] and chili [9,11]. Also in pot azalea, it has been shown that low mite numbers can lead to high damage rates [12]. Even after treatment, symptoms may continue to develop [13] and damage initiated in a plant progresses even when mites are no longer present.…”

Section: Introductionmentioning

confidence: 99%

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Jasmonic Acid and Salicylic Acid Levels in Defense Response of Azalea (Rhododendron simsii Hybrid) to Broad Mite (Polyphagotarsonemus latus)

et al. 2022

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The broad mite (Polyphagotarsonemus latus (Banks)) is an important pest in many crops, including azalea (Rhododendron simsii Planch. hybrid). Broad mites cause the malformation of shoot tips, leaves and flowers in azalea. It is known that the jasmonic acid (JA)- and salicylic acid (SA)-dependent signaling pathways are related to the presence of herbivorous mites. Here, we describe the levels of the two main plant defense-related hormones, SA and JA, in mite-infested plants. The plant hormones were analyzed using liquid chromatography combined with tandem mass spectrometry (LC-MS/MS). We studied both short-term hormonal responses under controlled conditions with artificial inoculation, and long-term responses under culture conditions with natural infestation. The long-term development of broad mite populations and hormone response were studied during two subsequent growing seasons on 3 and 18 different cultivars, respectively. During the experiments on 18 azalea cultivars under natural infestation, the presence of different species of tarsonemid mites was also examined. JA concentrations only showed variation in the early phase of infestation. Subsequently, the SA levels increased significantly for all the cultivars where broad mites were detected. Based on the observed timing of the defense responses, we suggest that the interaction of the JA and SA pathways as a defense response for pot azalea against P. latus involves a primary plant response through the JA pathway. In the presence of the mites, the production of SA increased in the plants in a later phase as the P. latus population grew. Our results also show that the hormone response depends on type of mite. Changes in hormone levels were found upon infestation with P. latus, but not in the presence of another frequently occurring tarsonemid mite, Tarsonemus confusus Ewing.

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Section: Introductionmentioning

confidence: 99%

“…Differences in susceptibility to broad mites have been observed in pot azalea, along with the damage rate, and in relation to the population sizes of P. latus on the tested azalea cultivars [12]. Trichomes (plant hairs) are potentially involved in broad mite resistance in pot azalea [14].…”

Section: Introductionmentioning

confidence: 99%

Jasmonic Acid and Salicylic Acid Levels in Defense Response of Azalea (Rhododendron simsii Hybrid) to Broad Mite (Polyphagotarsonemus latus)

et al. 2022

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“…Plant resistance to P. latus has been found in several plant species (Luypaert et al, 2014). The presence and density of trichomes have been reported as a predominant factor related to plant resistance/defence to this mite (Thungrabeab & Boonlertnirun, 2002;Matos et al, 2009;Luypaert et al, 2014). This constitutive physical trait, though, is not the only defence mechanism identified until now.…”

Section: Introductionmentioning

confidence: 99%

The response of citrus plants to the broad mitePolyphagotarsonemus latus(Banks) (Acari: Tarsonemidae)

Cabedo‐López

Cruz-Miralles

Peris

et al. 2021

Agri and Forest Entomology

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Polyphagotarsonemus latus (Banks) (Acari: Tarsonemidae) is a common polyphagous mite in tropical and subtropical areas and is considered as an important citrus pest. 2 To understand the response of citrus to P. latus infestation, we have characterized the volatile profile and the molecular defence mechanisms of two citrus genotypes, namely sour orange (Citrus aurantium) and Cleopatra mandarin (Citrus reshni), to P. latus infestation. These two species are important rootstocks for the citrus industry and display differential resistance to Tetranychus urticae Koch (Acari: Tetranychidae), with sour orange showing elevated levels of constitutive and induced resistance associated with the jasmonic acid (JA) pathway compared with Cleopatra mandarin. 3 P. latus infestation activated both the JA-and the salicylic acid-dependent pathways in sour orange but not in Cleopatra mandarin. However, this differential activation resulted in the production of similar volatile blends (a mixture of green leaf volatiles and aromatic compounds). 4 Contrary to T. urticae infestation, sour orange supported larger densities of P. latus than Cleopatra mandarin with similar injury levels. 5 Therefore, sour orange may be more tolerant to P. latus than Cleopatra mandarin.

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“…As an important ornamental pot plant in China, western Europe, USA, and Japan, R. simsii was introduced to Europe from Asia at the end of the 18th century (Galle 1985). Wild R. simsii germplasm resources are still today used to develop new cultivars with desired ornamental characters (Luypaert et al 2014). Furthermore, R. simsii plays a vital roles in preventing soil erosion and maintaining stability of forest ecological systems (Hahn et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity and population structure of Rhododendron simsii (Ericaceae) as revealed by microsatellite markers

Wang

Jin

YanYan

et al. 2019

Nordic Journal of Botany

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Rhododendron simsii Planch. (Ericaceae) is a valuable horticultural and medicinal plant species. In this study, the genetic diversity of eight wild R. simsii populations from the Dabie Mountains (central China) was investigated with 29 microsatellite markers. The results showed that R. simsii harbored a high level of genetic diversity (HE: 0.64–0.79; HO: 0.71–0.94; I = 1.917; h = 0.826), and 84.34% of this genetic variation was maintained within populations, while variation among populations only accounted for 15.66%. The number of alleles ranged from 6 to 11, with an average of 9.069. Heterozygote excess was found, with the mean FIS and FIT values of −0.1739 and 0.0092, respectively. The average value of gene flow (Nm) was 1.3525. Within‐population, genetic diversity (I) ranged from 1.131 to 1.681. Cluster analyses divided the eight populations into two clades: the ‘Ltjiuzihe’ population formed its own cluster, while the other seven populations clustered together. There was a weak negative correlation between genetic and geographic distance. The results are highly relevant for the conservation and sustainable utilization of wild R. simsii germplasm resources in central China.

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Screening for broad mite susceptibility in Rhododendron simsii hybrids

Cited by 13 publications

References 12 publications

Jasmonic Acid and Salicylic Acid Levels in Defense Response of Azalea (Rhododendron simsii Hybrid) to Broad Mite (Polyphagotarsonemus latus)

Jasmonic Acid and Salicylic Acid Levels in Defense Response of Azalea (Rhododendron simsii Hybrid) to Broad Mite (Polyphagotarsonemus latus)

The response of citrus plants to the broad mitePolyphagotarsonemus latus(Banks) (Acari: Tarsonemidae)

Genetic diversity and population structure of Rhododendron simsii (Ericaceae) as revealed by microsatellite markers

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