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RNAi-mediated abrogation of trehalase expression does not affect trehalase activity in sugarcane.


ABSTRACT: To engineer trehalose metabolism in sugarcane (Saccharum spp. hybrids) two transgenes were introduced to the genome: trehalose-6-phosphate synthase- phosphatase (TPSP), to increase trehalose biosynthesis and an RNAi transgene specific for trehalase, to abrogate trehalose catabolism. In RNAi-expressing lines trehalase expression was abrogated in many plants however no decrease in trehalase activity was observed. In TPSP lines trehalase activity was significantly higher. No events of co-integration of TPSP and RNAi transgenes were observed. We suggest trehalase activity is essential to mitigate embryonic lethal effects of trehalose metabolism and discuss the implications for engineering trehalose metabolism.

SUBMITTER: O'Neill BP 

PROVIDER: S-EPMC3606522 | biostudies-literature | 2012 Dec

REPOSITORIES: biostudies-literature

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RNAi-mediated abrogation of trehalase expression does not affect trehalase activity in sugarcane.

O'Neill Brian P BP   Purnell Matthew P MP   Nielsen Lars K LK   Brumbley Stevens M SM  

SpringerPlus 20121221 1


To engineer trehalose metabolism in sugarcane (Saccharum spp. hybrids) two transgenes were introduced to the genome: trehalose-6-phosphate synthase- phosphatase (TPSP), to increase trehalose biosynthesis and an RNAi transgene specific for trehalase, to abrogate trehalose catabolism. In RNAi-expressing lines trehalase expression was abrogated in many plants however no decrease in trehalase activity was observed. In TPSP lines trehalase activity was significantly higher. No events of co-integratio  ...[more]

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