INCREASED EXPRESSION OF PHOSPHATE TRANSPORTER OSPT2, OSPT6 AND A NOVEL GENE NRR NOT ENHANCES THE P-UPTAKE AND ACQUISITION IN RICE (ORYZA SATIVA L.) IN P-STRESS CONDITION

Abstract

Phosphorus (P) is one of the most important macronutrients in the plant lifecycle. Lack of phosphate (inorganic
phosphate, Pi) inhibits plant growth. Here, we report on the expression patterns, and the field validation of two
members of this family OsPT2 and OsPT6 along with a novel gene NRR, responds to macronutrient deûciency
and regulates root growth. The study showed that the expression of OsPT2, OsPT2 and NRR are much higher in
Satabdi, a P-deficient non-tolerant variery, whereas expression is low in P-deficient tolerant genotype, Gobindobhog
in P-srtess condition. Thus, OsPT2 , OsPT6 and NRR alleles of Gobindabhog were suitable for introgression into
non-tolerant cultivars.