PNH — Solanum lycopersicum

Summary

SlPNH (SOLYC01G010970.3) on tomato chromosome 1 encodes a protein containing Piwi, PAZ, and RNaseH-like domains, with annotated siRNA binding, RNA endonuclease activity, and histone ubiquitin ligase activity. In tomato, the gene is associated with fruit yield and axillary bud formation. It is linked to leaf polarity, leaf morphology, auxin signalling, TAS3 tasiRNA biogenesis, juvenile-to-adult transition, and virus resistance. Broader associations include style length, lycopene content, lignin biosynthesis, photosynthetic ability, root phototropism, meristem development, seed dormancy, and responses to UV light. Studies of related genes in other species connect the family to histone ubiquitination, leaf colour, flowering time, seed dormancy, and fungal susceptibility.