NOVELTY - Plant exhibiting modulated expression of one or more lipase/esterase/thioesterase family gene(s), where the plant comprises an altered or modified lignin and/or lignin composition, is new.    USE - The plant or biomass is useful for: accessing and/or processing carbohydrate polymers from plant matter and/or biofuel production; and producing biofuel, animal feed, bioplastic, chemical, pulp and paper, where the plant includes a crop, a grass species, and a species or hybrid including Saccharum, Zea, Triticum, Secale, Hordeum, Glycine, Oryza, Sorghum, Lolium, Vitis, Medicago, Eucalyptus and Panicum genera, the biomass includes stems, leaves and/or roots of the plant, and the biofuel is bioethanol (all claimed).    ADVANTAGE - The plant or biomass is capable of simply and economically producing the biofuel in an efficient manner.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) a plant exhibiting modulated expression, function and/or activity of one or more lipase/esterase/thioesterase family gene(s), where the lipase/esterase/thioesterase family gene(s) comprises (i) a gene encoded by a sequence of SEQ ID NO: 1 (an 1419 base pair sequence fully defined in the specification) or its fragment, (ii) a gene having a degree of identity or homology with SEQ ID NO: 1, (iii) a gene encoded by the sequences of SEQ ID NO: 3 (an 1316 base pair sequence fully defined in the specification), SEQ ID NO: 5 (a 981 base pair sequence fully defined in the specification), SEQ ID NO: 7 (a 966 base pair sequence fully defined in the specification), SEQ ID NO: 9 (an 1232 base pair sequence fully defined in the specification), SEQ ID NO: 11 (an 1295 base pair sequence fully defined in the specification), SEQ ID NO: 13 (an 1000 base pair sequence fully defined in the specification), SEQ ID NO: 15 (an 1113 base pair sequence fully defined in the specification) and/or SEQ ID NO: 17 (a 933 base pair sequence fully defined in the specification) or its fragment, and (iv) a gene encoding a protein functionally similar or equivalent to a protein encoded by the sequences of SEQ ID NOs: 1, 3, 5, 7, 9, 11, 13, 15 or 17;    (2) a plant exhibiting modulated expression, function and/or activity of one or more esterase/lysophospholipase enzyme(s), where the esterase/lysophospholipase enzyme(s) comprises (ia) an esterase/lipophospholipase enzyme encoded by a sequence of SEQ ID NO: 2 (a 332 base pair sequence fully defined in the specification) or its fragment, (iia) an esterase/lipophospholipase enzyme encoded by a protein having a degree of homology/identity with SEQ ID NO: 2, (iiia) an esterase/lipophospholipase enzyme encoded by a protein having a sequence corresponding to a sequence of SEQ ID NO: 4 (a 326 base pair sequence fully defined in the specification), SEQ ID NO: 6 (a 326 base pair sequence fully defined in the specification), SEQ ID NO: 8 (a 321 base pair sequence fully defined in the specification), SEQ ID NO: 10 (a 326 base pair sequence fully defined in the specification), SEQ ID NO: 12 (a 326 base pair sequence fully defined in the specification), SEQ ID NO: 14 (a 343 base pair sequence fully defined in the specification), SEQ ID NO: 16 (a 311 base pair sequence fully defined in the specification) or SEQ ID NO: 18 (a 311 base pair sequence fully defined in the specification) or its fragment, (iva) an esterase/lipophospholipase enzyme encoded by a sequence having a degree of homology/identity with the sequences of SEQ ID NOs: 4, 6, 8, 10, 12, 14, 16 or 18, and (va) an esterase/lipophospholipase enzyme functionally similar or equivalent to the lipophospholipase enzyme encoded by the sequences of SEQ ID NOs: 2, 4, 6, 8, 10, 12, 14, 16 or 18;    (3) producing a biofuel comprising obtaining material from the plant and subjecting the material or carbohydrates to a fermentation protocol;    (4) modifying the lignin content of the plant, comprising modifying the expression of the lipase/esterase/thioesterase family gene(s) and/or the expression, function and/or activity of a lipase/esterase/thioesterase family protein(s); and    (5) a modified plant or material derived from the plant, for producing biofuel.