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Response of sugar beet plants to ultraviolet‐B (280–320 nm) radiation and Cercospom leaf spot disease
Author(s) -
Panagopoulos Ioannis,
Bornman Janet F.,
Björn Lars Olof
Publication year - 1992
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1992.tb08776.x
Subject(s) - cercospora , sugar beet , leaf spot , lipid peroxidation , sugar , dry weight , chlorophyll , chemistry , botany , chenopodiaceae , horticulture , biology , antioxidant , food science , biochemistry
Sugar beet ( Beta vulgaris L.) plants injected with Cercospora beticota Sace. as well as non‐infected plants were grown under visible light with or without ultraviolet‐B (UV‐B, 280–320 nm) radiation for 40 days. An interaction between UV‐B radiation and Cercospora leaf spot disease was observed, resulting in a large reduction in leaf chlorophyll content, dry weight of leaf laminae, petioles and storage roots. Lipid peraxidation in leaves also increased the most under the combined treatments. This was also true for ultraweak luminescence from both adaxial and abaxial leaf surfaces. However, no correlation between lipid peroxidation and ultraweak luminescence was observed. Ultraviolet‐B radiation given alone appeared to have either a stimulating effect, giving an increase in dry weight of laminae and reducing lipid peroxidation, or no effect. This lack of effect was seen in the absence of change in dry weight of storage roots and chlorophyll content relative to controls. The :study demonstrated a harmful interaction between UV‐B radiation and Cercospom leaf spot disease on sugar beet.