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Engineering trehalose biosynthesis pathway improves yield potential in rice under drought, saline and sodic conditions

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Title Engineering trehalose biosynthesis pathway improves yield potential in rice under drought, saline and sodic conditions
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Creator Joshi R, Khirod Kumar Sahoo, Anil Kumar Singh, Khalid Anwar, Raj Kumar Gautam, S L Krishnamurthy, S K Sopory, Ashwani Pareek, Sneh Lata Singla-Pareek
 
Subject rice salinity
 
Description Not Available
Edaphic factors such as salinity, sodicity, and drought alone, or in combination, adversely affect crop productivity. Despite the burgeoning soil sodicity problem being reported worldwide, limited efforts have been made to address this issue. In the present study, we have targeted the generation of sodicity tolerant rice in conjunction with tolerance to salinity and drought. Using a fusion gene from E. coli coding for trehalose-6-phosphate synthase/phosphatase (TPSP) under the control of ABA-inducible promoter, we report here generation of marker-free transgenic high yielding rice (IR64) which can tolerate high pH (~9.9), high EC (~10.0 dS/m) and severe drought (30-35% soil moisture content). These plants retain higher relative water content, chlorophyll content, K+/Na+ ratio, stomatal conductance and photosynthetic efficiency than wild type under above-mentioned stresses. A positive correlation between trehalose overproduction and high yield parameters has been observed under drought, saline and sodic conditions. Metabo-profiling using GC-MS reflects that overproduction of trehalose in leaves differently modulates other metabolic switches leading to significant changes in the levels of sugars, amino acids, and organic acids in transgenic plants under control and stress conditions. Our findings reveal a novel technological solution to tackle multiple stresses under changing climatic conditions.
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Date 2019-12-04T04:05:38Z
2019-12-04T04:05:38Z
2019-09-01
 
Type Research Paper
 
Identifier 1. Joshi R, Khirod Kumar Sahoo, Anil Kumar Singh, Khalid Anwar, Raj Kumar Gautam, S L Krishnamurthy, S K Sopory, Ashwani Pareek, Sneh Lata Singla-Pareek. 2019. Engineering trehalose biosynthesis pathway improves yield potential in rice under drought, saline and sodic conditions, Journal of Experimental Botany, erz462, https://doi.org/10.1093/jxb/erz462
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http://krishi.icar.gov.in/jspui/handle/123456789/26806
 
Language English
 
Relation Not Available;
 
Publisher Journal of Experimental Botany