フザリウム萎凋下におけるトマト葉の光合成装置および酸化ストレスパラメータに及ぼすβ-1,3-グルカンの効果

β-1,3-glucan effect on the photosynthetic apparatus and oxidative stress parameters of tomato leaves under fusarium wilt.

• Liudmila Kabashnikova
• Larisa Abramchik
• Irina Domanskaya
• Galina Savchenko
• Sviatoslav Shpileuski

抄録

人為的に真菌病原体Fusarium oxysporum sp.によって引き起こされたフザリウム萎凋病を受けたトマト(Lycopersicon esculentum Mill., cv. Tamara)の葉の光合成装置および酸化ストレスパラメータに及ぼすβ-1,3-グルカンの影響を2ヶ月齢のトマト植物を用いて検討した。トマト植物を病原体で感染させると，葉の脂質過酸化（LPO）プロセスが活性化され，光合成装置に大きな変化が生じた。β-1,3-グルカンで植物を前処理すると、LPOの安定化に寄与し、感染した葉の葉緑体における光合成色素と光化学的プロセスのレベルを正常化し、薬剤の保護活性を示す。

The effect of β-1,3-glucan on the photosynthetic apparatus and oxidative stress parameters of tomato (Lycopersicon esculentum Mill., cv. Tamara) leaves under fusarium wilt caused artificially by the fungal pathogen Fusarium oxysporum sp. was studied in 2-month-old tomato plants. Infection of tomato plants with a pathogen causes activation of lipid peroxidation (LPO) processes in leaves and significant changes in the photosynthetic apparatus, which is reflected in a decrease in the chlorophyll (Chl) a and Chl a/Chl b ratio and carotenoid content, disturbances in the absorption and utilisation of light energy in PSII. Pretreatment of plants with β-1,3-glucan contributes to the stabilisation of LPO and normalises the level of a photosynthetic pigments and a course of photochemical processes in the chloroplasts of infected leaves, which indicates the protective activity of a drug.