Articles
Red-light treatment induces resistance in bell pepper to Phytophthora capsici
Article number
1337_12
Pages
89 – 92
Language
English
Abstract
This study was conducted to investigate the effects of red-light treatment on inducing resistance in bell pepper to Phytophthora capsici.
Seeds of bell pepper (Capsicum annuum, Hybrid SPP 6112) were sown in 10-cm-diameter plastic pots containing steamed soil mix and were grown on a greenhouse bench under red light irradiation (600-700 nm) from fluorescent tubes.
The fluorescent tubes provided red light with an intensity of 287 µW cm‑2, which was a supplement to natural daylight.
Control seedlings were kept under white light (WL) or under natural daylight (NDL) in the same greenhouse.
Three- and four-week-old seedlings were inoculated with a zoospore suspension of P. capsici (20×104 zoospores mL‑1 water). Plants were evaluated for damping-off symptoms every day for 15 days after inoculation.
Red-light treatment of seedlings reduced Phytophthora damping-off by up to 73%. Red-light treatment for four weeks was significantly more effective than red-light treatment for three-week in reducing Phytophthora damping-off.
Seeds of bell pepper (Capsicum annuum, Hybrid SPP 6112) were sown in 10-cm-diameter plastic pots containing steamed soil mix and were grown on a greenhouse bench under red light irradiation (600-700 nm) from fluorescent tubes.
The fluorescent tubes provided red light with an intensity of 287 µW cm‑2, which was a supplement to natural daylight.
Control seedlings were kept under white light (WL) or under natural daylight (NDL) in the same greenhouse.
Three- and four-week-old seedlings were inoculated with a zoospore suspension of P. capsici (20×104 zoospores mL‑1 water). Plants were evaluated for damping-off symptoms every day for 15 days after inoculation.
Red-light treatment of seedlings reduced Phytophthora damping-off by up to 73%. Red-light treatment for four weeks was significantly more effective than red-light treatment for three-week in reducing Phytophthora damping-off.
Authors
M. Babadoost, S.Z. Islam
Keywords
red light, pepper, Phytophthora capsici, Phytophthora blight, damping-off
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