Selective manipulation of the inositol metabolic pathway for induction of salt-tolerance in indica rice variety.

08:00 EDT 29th March 2019 | BioPortfolio

Summary of "Selective manipulation of the inositol metabolic pathway for induction of salt-tolerance in indica rice variety."

Halophytes are rich sources of salt stress tolerance genes which have often been utilized for introduction of salt-tolerance character in salt-sensitive plants. In the present study, we overexpressed PcINO1 and PcIMT1 gene(s), earlier characterized in this laboratory from wild halophytic rice Porteresia coarctata, into IR64 indica rice either singly or in combination and assessed their role in conferring salt-tolerance. Homozygous T/T transgenic plants revealed that PcINO1 transformed transgenic rice lines exhibit significantly higher tolerance upto 200 mM or higher salt concentration with negligible compromise in their growth or other physiological parameters compared to the untransformed system grown without stress. The PcIMT1-lines or the double transgenic lines (DC1) having PcINO1 and PcIMT1 introgressed together, were less efficient in such respect. Comparison of inositol and/or pinitol pool in three types of transgenic plants suggests that plants whose inositol production remains uninterrupted under stress by the functional PcINO1 protein, showed normal growth as in the wild-type plants without stress. It is conceivable that inositol itself acts as a stress-ameliorator and/or as a switch for a number of other pathways important for imparting salt-tolerance. Such selective manipulation of the inositol metabolic pathway may be one of the ways to combat salt stress in plants.


Journal Details

This article was published in the following journal.

Name: Scientific reports
ISSN: 2045-2322
Pages: 5358


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Medical and Biotech [MESH] Definitions

The ability of organisms to sense and adapt to high concentrations of salt in their growth environment.

Phosphoinositide phosphatases that catalyze the removal of the 5' phosphate from INOSITOL 1,4,5-TRISPHOSPHATE or myo-inositol 1,3,4,5-tetrakisphosphate, resulting in inositol 1,4-bisphosphate and phosphate. They have important functions in the metabolism of INOSITOL PHOSPHATES and inositol 1,4,5-trisphosphate signaling pathways such as CALCIUM SIGNALING.

Intracellular receptors that bind to INOSITOL 1,4,5-TRISPHOSPHATE and play an important role in its intracellular signaling. Inositol 1,4,5-trisphosphate receptors are calcium channels that release CALCIUM in response to increased levels of inositol 1,4,5-trisphosphate in the CYTOPLASM.

Phosphoric acid esters of inositol. They include mono- and polyphosphoric acid esters, with the exception of inositol hexaphosphate which is PHYTIC ACID.

A group of disorders caused by defective salt reabsorption in the ascending LOOP OF HENLE. It is characterized by severe salt-wasting, HYPOKALEMIA; HYPERCALCIURIA; metabolic ALKALOSIS, and hyper-reninemic HYPERALDOSTERONISM without HYPERTENSION. There are several subtypes including ones due to mutations in the renal specific SODIUM-POTASSIUM-CHLORIDE SYMPORTERS.

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