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Strength, stability and cis-motifs of in silico identified phloem-specific promoters in Brassica juncea (L.).

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Title Strength, stability and cis-motifs of in silico identified phloem-specific promoters in Brassica juncea (L.).
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Creator Koramutla M, Bhat D, Negi M, Venkatachalam P, Jain PK and Bhattacharya R
 
Subject Brassica juncea
Promoter
 
Description Not Available
Aphids, a hemipteran group of insects pose a serious threat to many of the major crop species including Brassica oilseeds. Transgenic strategies for developing aphid-resistant plant types necessitate phloem-bound expression of the insecticidal genes. A few known phloem-specific promoters, in spite of tissue-specific activity fail to confer high level gene-expression. Here, we identified seven orthologues of phloem-specific promoters in B. juncea (Indian mustard), and experimentally validated their strength of expression in phloem exudates. Significant cis-motifs, globally occurring in phloem-specific promoters showed variable distribution frequencies in these putative phloem-specific promoters of B. juncea. In RT-qPCR based gene-expression study promoter of Glutamine synthetase 3A (GS3A) showed multifold higher activity compared to others, across the different growth stages of B. juncea plants. A statistical method employing four softwares was devised for rapidly analysing stability of the promoter-activities across the plant developmental stages. Different statistical softwares ranked these B. juncea promoters differently in terms of their stability in promoter-activity. Nevertheless, the consensus in output empirically suggested consistency in promoter-activity of the six B. juncea phloem- specific promoters including GS3A. The study identified suitable endogenous promoters for high level and consistent gene-expression in B. juncea phloem exudate. The study also demonstrated a rapid method of assessing species-specific strength and stability in expression of the endogenous promoters.
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Date 2021-07-13T10:24:53Z
2021-07-13T10:24:53Z
2016-03-01
 
Type Research Paper
 
Identifier Koramutla M, Bhat D, Negi M, Venkatachalam P, Jain PK and Bhattacharya R (2016). Strength, stability and cis-motifs of in silico identified phloem-specific promoters in Brassica juncea (L.). Front. Plant Sci. 7:457. doi: 10.3389/ fpls.2016.00457
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http://krishi.icar.gov.in/jspui/handle/123456789/47808
 
Language English
 
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Publisher Not Available