NHX1 — Nicotiana attenuata
Summary
A4A49_04351 (NHX1/NHX2) on coyote tobacco chromosome 9 encodes a sodium/hydrogen exchanger with lithium:proton and potassium:proton antiporter activity, belonging to the cation/H⁺ exchanger CPA1 family. It is associated with vacuolar membrane transport, sodium import, lithium export, potassium ion homeostasis, cell pH regulation, and response to superoxide. The gene has been linked to leaf potassium content, sodium uptake, yield traits, photosynthetic rate, stomatal resistance, transpiration rate, plant height, root development, and abiotic stress responses including high temperature and UV-B sensitivity. Associations also include drought tolerance, stomatal conductance and regulation, cell expansion, auxin homeostasis, gravitropism, and flower development. Studies of related genes in other species connect the family to vacuolar pH homeostasis, potassium accumulation, sodium tolerance, and seed production.
Annotations
- Chromosome
- 9
- Related genes
- NHX1, NHX8, CEO, NHX3, SOS1, SNX1, NHX5, NHX6
- GO terms
- homeostasis, salinity response, sodium import, cell pH regulation, sodium:hydrogen exchanger, Response To Ozone, Programmed Cell Death, Potassium Ion Homeostasis
- Publications
- 19941154, 24337801, 27881680, 16132859, 22639643, 27940414, 30018156, 26353760
- Traits
- virescence, salt tolerance, phosphate uptake, salt stress tolerance, root-to-shoot communication, root-to-shoot long-distance signalling, circadian rhythm, heat tolerance