植物生长物质对茄茎剥皮后新皮再生的影响

THE EFFECTS OF PLANT GROWTH SUBSTANCES ON RINDREGENERATION AFTER GIRDLING IN SOLANUM MELONGENA CV.ESCULANTUM

近年发现一些具较强木质化的草本植物,例如茄、菊芋等的茎干剥皮后,也能不同程度地再生出新皮,它们新皮再生的速度比木本植物的迅速,而且草本植物与木本植物形成过程中的组织分化方式也有不同。现将植物生长物质处理对茄茎剥皮后。

This paper deals with the effects of four plant growth substances,ie.IAA,NAA,2,4-D and GA and their different concentration on rind-regeneration after girdling in Solanum me- longen var.esculantum.The formation of callus was promoted by IAA,NAA and GA,but retarded by 2,4-D in early stage.The initiation of vascular cambium in callus was retarded by all these substances.However,an increase in amount of xylem was promoted by IAA at low concentrations.The different concentrations of NAA and GA affected a decrease in amount of xylem. The formation of“bundled”vascular tissue was impelled by NAA,GA and 2,4-D.The initiation of phellogen was promoted by IAA and NAA at high concentrtion.In addition,the nest-like tracheid mass was induced in callus by IAA and NAA frequently.