Effects of Three Exogenous Substances on the Photosynthesis of Prunus pseudocerasu L.'Manaohong'Infected With Phytoplasma
Prunus pseudocerasu L.'Manaohong'infected with phytoplasma diseases were used as test materials.Exogenous methyl jasmonate(0.1 mmols·L-1),melatonin(0.1 mmol·L-1),and tetracycline(1 mmol·L-1)were used for treatments.Then the photosynthetic parameters,chlorophyll and related enzyme activity of plants were determined,the microstructure of leaves was observed,and the effects of three exogenous substances on photosynthesis after phytoplasma infection were studied,in order to provide reference for the prevention and control of Prunus pseudocerasu L.'Manaohong'phytoplasma disease.The results showed that the three substances could improve the microstructure of the leaves of susceptible plants,increase chlorophyll content,increase photosynthetic parameters and some enzyme activity.The results of methyl jasmonate treatment were similar to those of tetracycline treatment,but superior to melatonin treatment.
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