Claim 1: a plant or Plant part comprises a polinucle\u00f3tido which encodes a polypeptide of Cellulose synthase (CESA) mutated a variant of this,The expression of this polinucle\u00f3tido confers to the plant or Plant part tolerance to herbicides that inhibit ceases.Where the variant comprising one or more of the following reasons: (i) reason 1a: C \/ g \/ l [m \/ s] [f \/ V \/ l \/ I] F [f] [l \/ Q \/ h \/ r t \/ yr] [I] [V \/ C \/ t \/ s h \/ l \/ m \/ n]] [[to] [P (V \/ K \/ N \/ Q \/ R \/ t \/ e n \/ d]] [[and] P \/ F \/ g \/ A \/ t] LWL [t \/ V \/ I \/ l] Lives [RTN]Wfa [f \/ l \/ R \/ V \/ m] SW (SEQ ID no. 99) preferablyThe reason is c \/ g \/ l [m \/ s] [f \/ v [I] F \/ l \/ l \/ F] [q] [t \/ yr \/ h \/ C \/ v [I] t \/ S \/ h \/ n l] [PV] [K \/ N \/ Q \/ R \/ t \/ and \/ d] [n] [and] [P \/ F \/ g \/ A \/ t] LWL [t \/ V \/ I \/ l] Lives [RTN] Wfa [f \/ l \/ R \/ v] SW (1B SEQ ID no. 100) more preferenceThe reason is c \/ g \/ l [m] \/ [f] [L F V \/ F] [h] [t yr \/ Q \/ V \/ C \/ t \/ s [I] [HPV] K \/ N \/ R \/ e n \/ d]] [[P \/ ay \/ g LWL] [t \/ V \/ v [I] Lives]. [\/ l] (SW F 1c SEQ ID no. 101)Where the amino acid at position 8 and \/ or 23 within the sequence of the wild type was replaced with other Amino Acids (ii) 2A: yc [R \/ t \/ V \/ m \/ S \/ lpa [f]CL \/ V \/ I] [I] t [l \/ F \/ D \/ N \/ g] [R \/ K \/ t \/ Q \/ v [I] fi \/ t] P [E \/ Q \/ K \/ l] [I] [s] n [N \/ t \/ and \/ F \/ l \/ R \/ \/ A] [and] [g] [I \/ S \/ m \/ l \/ A \/ v] [W \/ C \/ F \/ l \/ V \/ I] F [I \/ m \/ l \/ V \/ l] [s] [l \/ S \/ A] F [I \/ V \/ A \/ l \/ S \/ m \/ g \/ C] [s] I (SEQ ID no. 102) preferablyThe reason is I \/ t \/ V yc [m] \/ [Ali] CL \/ F \/ V 1 [I] t [l \/ F \/ D \/ N \/ g] [R \/ K \/ t \/ and \/ Q] fiip [k] and [\/ Q \/ and \/ F \/ l \/] [\/ I] and [s] [I \/ m \/ g \/ l \/ V \/ C \/ F] [W] F [I] [l \/ l \/ m \/ S \/ v [I] LF \/ l] (Mark 2B SEQ ID no. 103) with higher preferenceThe reason is yc [R \/ t \/ V \/ m] ali [\/ I] ll F \/ v [I] [l \/ T D \/ N \/ g \
