Comparative Analysis of Epicarp Tissue Anatomical in Low Pesticide Residue
Cucumber Strain
ZHAO Wen，QIN Zhi-wei*，WU Peng，ZHOU Xiu-yan
College of Horticulture， Northeast Agricultural University， Key Laboratory of Biology and Genetic Improvement of
Horticultural Crops（Northeast region）， Ministry of Agriculture， Key Laboratory of Cold Area Vegetable Biology，
Harbin 150030， Heilongjiang， China
Abstract：The low pesticide residue cucumber（Cucumis sativus L.）strain（D0351）and the
high pesticide residue strain（D9320）were taken as tested materials．Chlorpyrifos and propamocarb
pesticide were sprayed on cucumber plants in harvest beginning stage．The epicarp cells morphology，
stoma，chloroplast and mitochondria ultra-structure of these 2 strains were compared．The result
indicated that the biggest difference between these 2 strains was the structure of the epicarp cells．The
epicarp cell of strain D0351 was elongated，while that of strain D9320 was foursquare．The outer area
of the epicarp cell of D0351was smaller than that of D9320．After pesticide sprayed treatment，the
epicarp cells of the strain D0351 became round or oblong，and the epicarp morphology of strain D0351
was changed，while that of strain D9320 was not changed．The epicarp cell areas of both strains were
increased．As for the stoma opening degree the strain D9320 is bigger than strains D0351．The number of osmium particle of both strains were increased and their sizes became larger in the chloroplast.
Mitochondrial morphology and internal structure was not changed .
