Development of tolerance of egg plant (Solanum melangena L.) to field application of dimethoate.
Dimethoate, at field concentration (1.419 mg g(-1) fr wt), caused inhibition of photosynthesis, transpiration and stomatal conductance of Solanum melangena L. on first treatment but subsequent treatments caused adaptation and recovery of these parameters. The variable fluorescence (F(v)), dissipation (DI(0)/RC), 2 ms relative variable fluorescence (V(j)), net rate of PS II closure (M(0)), and maximum trapping rate of active PS II (TR(0)/RC) increased initially but reduced to the control value with repetition of treatment. However, fluorescence yield (TR(0)/Abs), electron transport probability (ET(0)/TR(0)) and activity of RC (ET(0)/RC) increased with each treatment. With each subsequent treatment there was enhancement of activities of esterases and decrease of insecticide content of leaves.
Khillar
R
R
PG Department of Botany, Utkal University, Bhubaneswar 751 004, India.
Acharya
S
S
Mohapatra
P K
PK
D002734:Chlorophyll / Q000378:metabolism; D004117:Dimethoate / Q000633:toxicity*; D004361:Drug Tolerance; D004579:Electron Transport; D004950:Esterases / Q000378:metabolism; D005453:Fluorescence; D007306:Insecticides / Q000633:toxicity*; D045332:Photosystem II Protein Complex / Q000378:metabolism; D018515:Plant Leaves / Q000187:drug effects / Q000201:enzymology / Q000254:growth & development / Q000378:metabolism; D032322:Solanum / Q000187:drug effects* / Q000201:enzymology / Q000254:growth & development / Q000378:metabolism; D013997:Time Factors
D007306:Insecticides; D045332:Photosystem II Protein Complex; D002734:Chlorophyll; D004950:Esterases; D004117:Dimethoate