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Relationship of Resistance-Related Enzyme Activity and Salicylic Acid Content in Phalaenopsis Species with Different Levels of Resistance to Dickeya dadantii

I Putu Wahyu Sanjaya

I Putu Wahyu Sanjaya

Plant Breeding and Biotechnology Study Program, Graduate School, IPB UniversityIndonesia
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Sanjaya, I Putu Wahyu
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Dewi Sukma

Dewi Sukma

Department of Agronomy and Horticulture, Faculty of Agriculture, IPB UniversityIndonesia
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Sukma, Dewi
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Sudarsono Sudarsono

Sudarsono Sudarsono

Department of Agronomy and Horticulture, Faculty of Agriculture, IPB UniversityIndonesia
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Sudarsono, Sudarsono
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Ming-Tsair Chan

Ming-Tsair Chan

Academia Sinica, Biotechnology Center in Southern TaiwanTaiwan
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Chan, Ming-Tsair
  
31. Dez. 2021
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Online veröffentlicht: 31. Dez. 2021
Seitenbereich: 31 - 44
Eingereicht: 01. Juli 2021
Akzeptiert: 01. Nov. 2021
DOI: https://doi.org/10.2478/johr-2021-0018
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© 2021 I Putu Wahyu Sanjaya et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Figure 1

The development of soft-rot disease symptoms among four species: (A) SrSD on infected leaves at 0–18 hours post-inoculation (HPI), D. dadantii colony-forming units (CFU) in infected leaves at 18 HPI, (B) the area under disease progress curve in four Phalaenopsis species at various HPI
The development of soft-rot disease symptoms among four species: (A) SrSD on infected leaves at 0–18 hours post-inoculation (HPI), D. dadantii colony-forming units (CFU) in infected leaves at 18 HPI, (B) the area under disease progress curve in four Phalaenopsis species at various HPI

Figure 2

Percentage of lignin content in dry weight of Phalaenopsis species resistant (P. amboinensis) and very susceptible (P. amabilis) of D. dadantii at 12 HPI. There is no significant difference between the two species based on the Student’s T-test
Percentage of lignin content in dry weight of Phalaenopsis species resistant (P. amboinensis) and very susceptible (P. amabilis) of D. dadantii at 12 HPI. There is no significant difference between the two species based on the Student’s T-test

The reaction of four Phalaenopsis species to D_ dadantii inoculation

Species 6 HPI 12 HPI 18 HPI
SrSD (mm) DS (%) RC SrSD (mm) DS (%) RC SrSD (mm) DS (%) RC
P. amboinensis 0.5 ± 0.1d 7 ± 0.0 R 0.6 ± 0.5d 7 ± 0.1 R 1.3 ± 0.8c 20 ± 0.1 R
P. pantherina 2.7 ± 1.3c 30 ± 0.1 MR 4.4 ± 3.2c 50 ± 0.4 MS 7.9 ± 7.1b 70 ± 0.5 S
P. schilleriana 4.4 ± 0.6b 50 ± 0.0 MS 10.1 ± 2.5b 93 ± 0.2 VS 15.4 ± 4.7a 100 ± 0.2 VS
P. amabilis 7.9 ± 0.4a 83 ± 0.1 VS 14.3 ± 1.4a 100 ± 0.0 VS 20.0 ± 1.5a 100 ± 0.0 VS

POD, PAL, and SA content in P_ amabilis and P_ amboinensis 12 hours post-inoculation

Resistance level to dadantii D. Treatment POD (unit·min−1·mg−1 protein × 10−4) PAL (unit·min−1·mg−1 protein × 10−4) SA (ppm of fresh sample)
very susceptible P. amabilis non-inoculated 15.30 ± 6.93a 12.20 ± 1.60a 5.26 ± 0.22a
P. amabilis inoculated 14.96 ± 11.78a 10.78 ± 7.59a 5.32 ± 0.46a
resistant P. amboinensis non-inoculated 2.35 ± 0.22b 1.54 ± 0.16b 12.56 ± 2.83b
P. amboinensis inoculated 1.64 ± 0.83b 1.26 ± 0.44b 12.88 ± 2.14b
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