Long Standing Batavian (Lactuca sativa) — Plant Gene Profile | Zobium

Flavor & Sensory Profile

Dominant notes: fresh green, crisp, mild, slightly herbal.

Key Genes in Long Standing Batavian

• Terpene Synthase 1 (β-caryophyllene) (LsTPS1) — Encodes the primary sesquiterpene synthase responsible for producing (E)-β-caryophyllene, the dominant defence-related volatile in lettuce, released when plants are stressed or damaged.: produces (E)-β-caryophyllene, caryophyllene oxide
• Terpene Synthase 2 (β-ocimene) (LsTPS2) — Encodes a monoterpene synthase producing (E)-β-ocimene, a light floral-herbaceous volatile that contributes to the fresh green aroma of Batavian lettuce leaves.: produces (E)-β-ocimene
• Lipoxygenase 1 (LsLOX1) — Encodes a lipoxygenase enzyme that converts polyunsaturated fatty acids into C6 aldehydes and alcohols, generating the crisp, fresh-cut green aroma characteristic of Batavian lettuce.: produces hexanal, (Z)-3-hexenal
• Phytoene Synthase 1 (LsPSY1) — Encodes the rate-limiting enzyme in carotenoid biosynthesis, driving production of lutein and beta-carotene that give lettuce leaves their yellow-green colour and nutritional value.: produces lutein, beta-carotene
• Bolting Repressor 1 (FLC-like) (LsBOL1) — Encodes a flowering-time repressor homologous to FLC that delays bolting under long-day and warm conditions; high expression in Long Standing Batavian underpins its exceptional bolt resistance.: produces FLC-like transcription factor
• Expansin 1 (LsEXP1) — Encodes a cell-wall expansin that loosens and expands leaf cell walls, contributing to the thick, blistered, crunchy leaf texture that is the defining trait of Batavian-type lettuces.: produces cell-wall extensibility factor

Metabolic Pathways

• Terpene Biosynthesis (MEP pathway) — activity 55%: Produces (E)-β-caryophyllene, caryophyllene oxide, and (E)-β-ocimene — the spicy-woody and fresh-floral volatile blend typical of Batavian lettuce.
• Lipoxygenase (Green Leaf Volatile) Pathway — activity 55%: Generates hexanal and (Z)-3-hexenal for the fresh-cut green aroma released when leaves are cut or chewed.
• Carotenoid Biosynthesis — activity 45%: Supplies lutein and beta-carotene responsible for the light-green leaf colour and nutritional density.
• Bolting / Flowering-Time Control — activity 75%: High repressor activity delays premature flowering (bolting), extending the harvest window and preventing bitterness from elevated sesquiterpene lactones.
• Leaf Texture & Cell-Wall Architecture — activity 65%: Controls the characteristic thick, blistered, crunchy Batavian leaf texture prized by growers and consumers.

Soil Microbiome Recommendations

• Rhizophagus irregularis — Wider root network improves phosphorus uptake and drought tolerance, supporting faster head development in warm, dry conditions.
• Bacillus subtilis — Reduces risk of grey mould (Botrytis cinerea) and downy mildew on the dense Batavian head, especially under humid conditions.
• Trichoderma harzianum — Suppresses soil-borne diseases (Pythium, Rhizoctonia) that damage the shallow lettuce root system, improving establishment and uniformity.
• Bacillus amyloliquefaciens — Stimulates root growth and leaf carotenoid content, potentially improving the nutritional value of harvested heads.