Fig. 4.

Constitutive expression of antisense Atcel1 in transgenic A. thaliana and infection of these plant roots with the root-knot nematode, M. incognita. A) Both shoot and root development of Atcel1 antisense (ANTI) plants are compromised as compared to wild-type (WT) Arabidopsis. B) Giant cells (GC) form normally around the head of a developing root-knot nematode (N) in a (10-μm-thick) cross- section of a wild-type Arabidopsis root. C) Giant cell and nematode development in antisense Atcel1 Arabidopsis progress normally even as root and shoot development are compromised. Abbreviations are defined in the text and in Table 2.