TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Method: In the method of engineering a plant to increase the production of a biosynthetic product in a desired tissue, the promoter is a tissue-specific secondary wall promoter and the transcription factor induces expression of secondary wall biosynthetic products. The transcription factor is NAC secondary wall-thickening promoting factor 1 (NST1), NST2, NST3, secondary wall-associated NAC domain protein 2 (SND2), SND3, MYB domain protein 103 (MYB 103), MBY85, MYB46, MYB83, MYB58, or MYB63, where the tissue-specific secondary wall promoter is an irregular xylem (IRX)1, IRX3, IRX5, IRX8, IRX9, IRX14, IRX7, IRX10, GAUT13, GAUT14, or CESA4 promoter. The transcription factor induces expression of wax and/or cutin, where the transcription factor is a shine (SHN) transcription factor selected from SHN1 (also known as WIN 1), SHN2, SHN3, SHN4, or SHN5; or MYB96, where the promoter is a CER1, CER2, CER3, CER4, CER5, CER6, CER10, WSD1, Mahl, WBC11, KCS1, KCS2, FATB, LACS1, LACS2, CYP864A, CYP86A7, CYP86A5, KCS10, or KCS5 promoter. The plant is Arabidopsis, poplar, eucalyptus, rice, corn, switchgrass, sorghum, millet, Miscanthus, sugarcane, pine, alfalfa, wheat, soy, barley, turfgrass, tobacco, hemp, bamboo, rape, sunflower, willow, or Brachypodium. Engineering a plant having increased secondary cell wall deposition, comprises introducing an expression cassette into the plant, where the expression cassette comprises a polynucleotide encoding a transcription factor that regulates the production of secondary cell wall in woody tissue operably linked to a heterologous promoter, where the promoter enhances expression of a gene that is a downstream target of the transcription factor; and culturing the plant under conditions in which the transcription factor is expressed. The plant in which the polynucleotide operably linked to the heterologous promoter is expressed is a wild-type plant. The plant in which the polynucleotide operably linked to the heterologous promoter is expressed is an engineered plant having lignin deposition that is substantially localized to the vessels of xylem tissue of the plant. Engineering a plant having lignin deposition that is substantially localized to the vessels of xylem tissue of the plant, comprises introducing an expression cassette into the plant, where the plant is modified to have a reduced level of expression of a lignin biosynthesis enzyme; and further, where the expression cassette comprises a polynucleotide encoding the lignin biosynthesis enzyme operably linked to a heterologous vessel-specific promoter; and culturing the plant under conditions in which the lignin biosynthesis enzyme is expressed. The lignin biosynthesis enzyme is phenylalanine ammonia lyase (PAL), cinnamate-4-hydroxylase (C4H) (preferred), 4-coumarate Coenzyme A (CoA) ligase (4CL), hydroxycinnamoyl transferase (HCT), p-coumarate 3-hydroxylase (C3H), or cinnamoyl-CoA reductase 1 (CCR1). The promoter is a VND1, VND2, VND3, VND4, VND5, VND6, VND7, VNI2, REF4, or RFR1 promoter. The level of expression of the lignin biosynthesis enzyme in the modified plant is reduced by contacting the plant with an antisense oligonucleotide that silences expression of the gene encoding the lignin biosynthesis enzyme. The modified plant in which the polynucleotide operably linked to the heterologous promoter is expressed has a mutation in the gene encoding the lignin synthesis enzyme that decreases expression of the enzyme. Engineering a plant having xylan deposition that is substantially localized to the vessels of xylem tissue of the plant, comprises introducing an expression cassette into the plant, where the plant is modified to have a reduced level of expression of a xylan biosynthesis enzyme; and further, where the expression cassette comprises a polynucleotide encoding the xylan biosynthesis enzyme operably linked to a heterologous vessel-specific promoter; and culturing the plant under conditions in which the xylan biosynthesis enzyme is expressed. The xylan biosynthesis enzyme is IRX8, IRX14, IRX14-like, IRX9, IRX9-like, IRX7, IRX10, IRX10-like, IRX15, IRX15-like, F8H, or PARVUS. The level of expression of the xylan biosynthesis enzyme in the modified plant is reduced by contacting the plant with an antisense oligonucleotide that silences expression of the gene encoding the xylan biosynthesis enzyme. The modified plant in which the polynucleotide operably linked to the heterologous promoter is expressed has a mutation in the gene encoding the xylan synthesis enzyme that decreases expression of the enzyme. Engineering a plant having xylan O-acetylation that is substantially localized to the vessels of xylem tissue of the plant, comprises introducing an expression cassette into the plant, where the plant is modified to have a reduced level of expression of an enzyme responsible for xylan O-acetylation; and further, where the expression cassette comprises a polynucleotide encoding the xylan O-acetylation enzyme operably linked to a heterologous vessel-specific promoter; and culturing the plant under conditions in which the xylan O-acetylation enzyme is expressed. The xylan O-acetylation enzyme is an RWA protein. The level of expression of the xylan O-acetylation enzyme in the modified plant is reduced by contacting the plant with an antisense oligonucleotide that silences expression of the gene encoding the xylan O-acetylation enzyme. The modified plant in which the polynucleotide operably linked to the heterologous promoter is expressed has a mutation in the gene encoding the xylan O-acetylation enzyme that decreases expression of the enzyme. ACTIVITY - Plant Protectant. No biological data given.    MECHANISM OF ACTION - None Given.    EXAMPLE - No suitable example given.